• Warehouse address: github.com/ldqk/Masuit.Tools

Contains some commonly used operation classes, mostly static classes, encryption and decryption, reflection operations, weighted random filtering algorithm, distributed short id, expression tree, linq extension, file compression, multi-threaded download and FTP client, hardware information, string extension method, date-time extension operation, China lunar calendar, large file copying, image clipping, Captcha, breakpoint continuation, collection extension, Excel export and other common packaging. ** Many functions are combined in one piece, and the code size is less than 2MB!**

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Project development model: daily code accumulation + network collection
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一旦使用本开源项目以及引用了本项目或包含本项目代码的公司因为违反劳动法（包括但不限定非法裁员、超时用工、雇佣童工等）在任何法律诉讼中败诉的，一经发现，本项目作者有权利追讨本项目的使用费（公司工商注册信息认缴金额的 2-5 倍作为本项目的授权费），或者直接不允许使用任何包含本项目的源代码！任何性质的外包公司或996公司需要使用本类库，请联系作者进行商业授权！其他企业或个人可随意使用不受限。996 那叫用人，也是废人。8 小时工作制才可以让你有时间自我提升，将来有竞争力。反对 996，人人有责！

Recommended development environment

Operating system: Windows 10 1903 and above
Development tool: VisualStudio2019 v16.5 and above
SDK: . NET Core 2.1.0 and above

installer package

Basic Function Package

.NET Framework版本的包因打包环境异常，无法正常发布更新，目前暂时停更~

.NET Framework ≥ 4.6.1

PM> Install-Package Masuit.Tools.Net

NET Standard ≥ 2.1 or just want to use some basic features

通用项目推荐首选包

PM> Install-Package Masuit.Tools.Abstraction

.NET Core ≥ 2.1

.NET Core项目推荐首选包

PM> Install-Package Masuit.Tools.Core

NET Framework 4.5 Special Edition

请注意：这是.NET Framework 4.5的专用版本，相比4.6.1及.NET Core的版本，阉割了Redis、HTML、文件压缩、ASP.NET扩展、硬件监测、Session扩展等一些功能。如果你的项目版本高于 4.5，请务必使用上述版本的包，以享受完整的功能体验！

PM> Install-Package Masuit.Tools.Net45

Value-added package

Masuit.Tools.AspNetCore

AspNetCore项目推荐首选包

The ASP.NET Core Web Dedicated Package contains all the features of Masuit.Tools.Core and adds some additional support for ASP.NET Core Web features.

Masuit.Tools.Excel

Dedicated stand-alone packages imported and exported by Excel

Masuit.Tools.NoSQL.MongoDBClient

Mongodb's encapsulation operation class independent package

Register configuration for the tool library

The tool library requires the external configuration section. NET Framework projects are configured in the AppSettings configuration section of web.config/app.config, and. NET Core projects are configured in appsettings. json:

1. EmailDomainWhiteList，邮箱校验需要用到的白名单域名，英文逗号分隔，每个元素支持正则表达式，若未配置，则不启用邮箱校验白名单，示例: "^\\w{1,5}@qq.com,^\\w{1,5}@163.com,^\\w{1,5}@gmail.com,^\\w{1,5}@outlook.com"

2. EmailDomainBlockList, the blacklist domain name needed for mailbox verification, separated by English commas. Each element supports regular expressions, and the blacklist has a higher priority than the whitelist. If it is not configured, mailbox verification blacklist will not be enabled

public Startup(IConfiguration configuration)
{
    configuration.AddToMasuitTools(); // 若未调用，则默认自动尝试加载appsettings.json
}

Featured Function Sample Code

online experience

https://replit.com/@ldqk/MasuitToolsDemo?v=1#main.cs

1. Verify whether the string is Email, mobile phone number, URL, IP address, ID number, etc.

var (isMatch, match) = "337845818@qq.com".MatchEmail(); // 可在appsetting.json中添加EmailDomainWhiteList和EmailDomainBlockList配置邮箱域名黑白名单，逗号分隔，如"EmailDomainBlockList": "^\\w{1,5}@qq.com,^\\w{1,5}@163.com,^\\w{1,5}@gmail.com,^\\w{1,5}@outlook.com",
bool isInetAddress = "114.114.114.114".MatchInetAddress();
bool isUrl = "http://ldqk.org/20/history".MatchUrl();
bool isPhoneNumber = "15205201520".MatchPhoneNumber();
bool isIdentifyCard = "312000199502230660".MatchIdentifyCard();// 校验中国大陆身份证号
bool isCNPatentNumber = "200410018477.9".MatchCNPatentNumber(); // 校验中国专利申请号或专利号，是否带校验位，校验位前是否带“.”，都可以校验，待校验的号码前不要带CN、ZL字样的前缀

2. Hardware monitoring (only supports Windows, some functions only support physical machine mode)

float load = SystemInfo.CpuLoad;// 获取CPU占用率
long physicalMemory = SystemInfo.PhysicalMemory;// 获取物理内存总数
long memoryAvailable = SystemInfo.MemoryAvailable;// 获取物理内存可用率
double freePhysicalMemory = SystemInfo.GetFreePhysicalMemory();// 获取可用物理内存
double temperature = SystemInfo.GetCPUTemperature();// 获取CPU温度
int cpuCount = SystemInfo.GetCpuCount();// 获取CPU核心数
var ipAddress = SystemInfo.GetLocalIPs();// 获取本机所有IP地址
string localUsedIp = SystemInfo.GetLocalUsedIP();// 获取本机当前正在使用的IP地址
IList<string> macAddress = SystemInfo.GetMacAddress();// 获取本机所有网卡mac地址
string osVersion = Windows.GetOsVersion();// 获取操作系统版本
RamInfo ramInfo = SystemInfo.GetRamInfo();// 获取内存信息
var cpuSN=SystemInfo.GetCpuInfo()[0].SerialNumber; // CPU序列号
var driveSN=SystemInfo.GetDiskInfo()[0].SerialNumber; // 硬盘序列号

// 快速方法
var cpuInfos = CpuInfo.Locals; // 快速获取CPU的信息
var ramInfo = RamInfo.Local; // 快速获取内存的信息
var diskInfos = DiskInfo.Locals; // 快速获取硬盘的信息
var biosInfo = BiosInfo.Local; // 快速获取主板的信息

3. Anti-XSS processing of html:

string html = @"<link href='/Content/font-awesome/css' rel='stylesheet'/>
        <!--[if IE 7]>
        <link href='/Content/font-awesome-ie7.min.css' rel='stylesheet'/>
        <![endif]-->
        <script src='/Scripts/modernizr'></script>
        <div id='searchBox' role='search'>
        <form action='/packages' method='get'>
        <span class='user-actions'><a href='/users/account/LogOff'>退出</a></span>
        <input name='q' id='searchBoxInput'/>
        <input id='searchBoxSubmit' type='submit' value='Submit' />
        </form>
        </div>";
string s = html.HtmlSantinizerStandard();//清理后：<div><span><a href="/users/account/LogOff">退出</a></span></div>

4. Clean up the memory of your Windows system:

Similar to the accelerator ball function of major system optimization software

Windows.ClearMemorySilent();

5. Arbitrary binary conversion

Can be used to generate short id, short hash, random string and other operations, pure mathematical operations.

NumberFormater nf = new NumberFormater(36);//内置2-62进制的转换
//NumberFormater nf = new NumberFormater("0123456789abcdefghijklmnopqrstuvwxyz");// 自定义进制字符，可用于生成验证码
string s36 = nf.ToString(12345678);
long num = nf.FromString("7clzi");
Console.WriteLine("12345678的36进制是：" + s36); // 7clzi
Console.WriteLine("36进制的7clzi是：" + num); // 12345678
var s = new NumberFormater(62).ToString(new Random().Next(100000, int.MaxValue)); //配合随机数生成随机字符串

//扩展方法形式调用
var bin=12345678.ToBase(36);// 10进制转36进制：7clzi
var num="7clzi".FromBase(36);// 36进制转10进制：12345678

//超大数字的进制转换
var num = "e6186159d38cd50e0463a55e596336bd".FromBaseBig(16); // 大数字16进制转10进制
Console.WriteLine(num); // 十进制：305849028665645097422198928560410015421
Console.WriteLine(num.ToBase(64)); // 64进制：3C665pQUPl3whzFlVpoPqZ，22位长度
Console.WriteLine(num.ToBase(36)); // 36进制：dmed4dkd5bhcg4qdktklun0zh，25位长度
Console.WriteLine(num.ToBase(7)); // 7进制：2600240311641665565300424545154525131265221035，46位长度
Console.WriteLine(num.ToBase(12)); // 12进制：5217744842749978a756b22135b16a5998a5，36位长度
Console.WriteLine(num.ToBase(41)); // 41进制：opzeBda2aytcEeudEquuesbk，24位长度

6. Nanosecond performance timer

HiPerfTimer timer = HiPerfTimer.StartNew();
for (int i = 0; i < 100000; i++)
{
    //todo
}
timer.Stop();
Console.WriteLine("执行for循环100000次耗时"+timer.Duration+"s");

double time = HiPerfTimer.Execute(() =>
{
    for (int i = 0; i < 100000; i++)
    {
        //todo
    }
});
Console.WriteLine("执行for循环100000次耗时"+time+"s");

7. Produce distributed unique ordered short id(snowflake id)

var sf = SnowFlake.GetInstance();
string token = sf.GetUniqueId();// rcofqodori0w
string shortId = sf.GetUniqueShortId(8);// qodw9728

var set = new HashSet<string>();
double time = HiPerfTimer.Execute(() =>
{
    for (int i = 0; i < 1000000; i++)
    {
        set.Add(SnowFlake.GetInstance().GetUniqueId());
    }
});
Console.WriteLine(set.Count == 1000000); //True
Console.WriteLine("产生100w个id耗时" + time + "s"); //2.6891495s

8. Lunar conversion

ChineseCalendar.CustomHolidays.Add(DateTime.Parse("2018-12-31"),"元旦节");//自定义节假日
ChineseCalendar today = new ChineseCalendar(DateTime.Parse("2018-12-31"));
Console.WriteLine(today.ChineseDateString);// 二零一八年十一月廿五
Console.WriteLine(today.AnimalString);// 生肖：狗
Console.WriteLine(today.GanZhiDateString);// 干支：戊戌年甲子月丁酉日
Console.WriteLine(today.DateHoliday);// 获取按公历计算的节假日
...

9. Linq expression tree extension

Expression<Func<string, bool>> where1 = s => s.StartsWith("a");
Expression<Func<string, bool>> where2 = s => s.Length > 10;
Func<string, bool> func = where1.And(where2)
    .AndIf(!string.IsNullOrEmpty(name),s=>s==name)
    .Compile(); // And和AndIf可供选择，满足条件再执行And
bool b=func("abcd12345678");//true

Expression<Func<string, bool>> where1 = s => s.StartsWith("a");
Expression<Func<string, bool>> where2 = s => s.Length > 10;
Func<string, bool> func = where1
    .Or(where2)
    .OrIf(!string.IsNullOrEmpty(name),s=>s==name)
    .Compile(); // Or和OrIf可供选择，满足条件再执行Or
bool b=func("abc");// true

queryable.WhereIf(!string.IsNullOrEmpty(name),e=>e.Name==name)
    .WhereIf(()=> age.HasValue,e=>e.Age>=age); // IQueryable的WhereIf扩展函数，满足条件再执行Where

10. template engine

var tmp = new Template("{{name}}，你好！");
tmp.Set("name", "万金油");
string s = tmp.Render();//万金油，你好！

var tmp = new Template("{{one}},{{two}},{{three}}");
string s = tmp.Set("one", "1").Set("two", "2").Set("three", "3").Render();// 1,2,3

var tmp = new Template("{{name}}，{{greet}}！");
tmp.Set("name", "万金油");
string s = tmp.Render();// throw 模版变量{{greet}}未被使用

11. List to Datatable

var list = new List<MyClass>()
{
    new MyClass()
    {
        Name = "张三",
        Age = 22
    },
    new MyClass()
    {
        Name = "李四",
        Age = 21
    },
    new MyClass()
    {
        Name = "王五",
        Age = 28
    }
};
var table = list.Select(c => new{姓名=c.Name,年龄=c.Age}).ToDataTable();// 将自动填充列姓名和年龄

12. File compression and decompression

.NET Framework

MemoryStream ms = SevenZipCompressor.ZipStream(new List<string>()
{
    @"D:\1.txt",
    "http://ww3.sinaimg.cn/large/87c01ec7gy1fsq6rywto2j20je0d3td0.jpg",
});//压缩成内存流

SevenZipCompressor.Zip(new List<string>()
{
    @"D:\1.txt",
    "http://ww3.sinaimg.cn/large/87c01ec7gy1fsq6rywto2j20je0d3td0.jpg",
}, zip);//压缩成zip
SevenZipCompressor.UnRar(@"D:\Download\test.rar", @"D:\Download\");//解压rar
SevenZipCompressor.Decompress(@"D:\Download\test.tar", @"D:\Download\");//自动识别解压压缩包
SevenZipCompressor.Decompress(@"D:\Download\test.7z", @"D:\Download\");

ASP.NET Core

Startup.cs

services.AddSevenZipCompressor();

Constructor injects ISevenZipCompressor

private readonly ISevenZipCompressor _sevenZipCompressor;
public Test(ISevenZipCompressor sevenZipCompressor)
{
    _sevenZipCompressor = sevenZipCompressor;
}

Usage is the same as the. NET Framework version

13. Simple Log Component (It's not like you can't use.jpg)

LogManager.LogDirectory=AppDomain.CurrentDomain.BaseDirectory+"/logs";
LogManager.Event+=info =>
{
    //todo:注册一些事件操作
};
LogManager.Info("记录一次消息");
LogManager.Error(new Exception("异常消息"));

14. FTP client

FtpClient ftpClient = FtpClient.GetAnonymousClient("192.168.2.2");//创建一个匿名访问的客户端
//FtpClient ftpClient = FtpClient.GetClient("192.168.2.3","admin","123456");// 创建一个带用户名密码的客户端
ftpClient.Delete("/1.txt");// 删除文件
ftpClient.Download("/test/2.txt","D:\\test\\2.txt");// 下载文件
ftpClient.UploadFile("/test/22.txt","D:\\test\\22.txt",(sum, progress) =>
{
    Console.WriteLine("已上传："+progress*1.0/sum);
});//上传文件并检测进度
List<string> files = ftpClient.GetFiles("/");//列出ftp服务端文件列表
...

15. Multi-threaded background download

var mtd = new MultiThreadDownloader("https://attachments-cdn.shimo.im/yXwC4kphjVQu06rH/KeyShot_Pro_7.3.37.7z",Environment.GetEnvironmentVariable("temp"),"E:\\Downloads\\KeyShot_Pro_7.3.37.7z",8);
mtd.Configure(req =>
 {
     req.Referer = "https://masuit.com";
     req.Headers.Add("Origin", "https://baidu.com");
});
mtd.TotalProgressChanged+=(sender, e) =>
{
    var downloader = sender as MultiThreadDownloader;
    Console.WriteLine("下载进度："+downloader.TotalProgress+"%");
    Console.WriteLine("下载速度："+downloader.TotalSpeedInBytes/1024/1024+"MBps");
};
mtd.FileMergeProgressChanged+=(sender, e) =>
{
    Console.WriteLine("下载完成");
};
mtd.FileMergedComplete+=(sender,e)=>{
    Console.WriteLine("文件合并完成");
};
mtd.Start();//开始下载
//mtd.Pause(); // 暂停下载
//mtd.Resume(); // 继续下载

16. Encryption and decryption/hash

var enc="123456".MDString();// MD5
var enc="123456".MDString("abc");// MD5加盐
var enc="123456".MDString2();// MD5两次
var enc="123456".MDString2("abc");// MD5两次加盐
var enc="123456".MDString3();// MD5三次
var enc="123456".MDString3("abc");// MD5三次加盐

string aes = "123456".AESEncrypt();// AES加密为密文
string s = aes.AESDecrypt(); //AES解密为明文
string aes = "123456".AESEncrypt("abc");// AES密钥加密为密文
string s = aes.AESDecrypt("abc"); //AES密钥解密为明文

string enc = "123456".DesEncrypt();// DES加密为密文
string s = enc.DesDecrypt(); //DES解密为明文
string enc = "123456".DesEncrypt("abcdefgh");// DES密钥加密为密文
string s = enc.DesDecrypt("abcdefgh"); //DES密钥解密为明文

RsaKey rsaKey = RsaCrypt.GenerateRsaKeys();// 生成RSA密钥对
string encrypt = "123456".RSAEncrypt(rsaKey.PublicKey);// 公钥加密
string s = encrypt.RSADecrypt(rsaKey.PrivateKey);// 私钥解密

string s = "123".Crc32();// 生成crc32摘要
string s = "123".Crc64();// 生成crc64摘要
string s = "123".SHA256();// 生成SHA256摘要

string pub="hello,world!";
string hidden="ldqk";
var str = pub.InjectZeroWidthString(hidden); // 扩展函数调用：将"ldqk"以零宽字符串的方式隐藏在"hello,world!"中
var str = ZeroWidthCodec.Encrypt(pub,hidden); // 类调用：将"ldqk"以零宽字符串的方式隐藏在"hello,world!"中
var dec = str.DecodeZeroWidthString(); // 扩展函数调用：将包含零宽字符串的密文解密出隐藏字符串"ldqk"
var dec = ZeroWidthCodec.Decrypt(str); // 类调用：将包含零宽字符串的密文解密出隐藏字符串"ldqk"
var enc = hidden.EncodeToZeroWidthText(); // 扩展函数调用：将字符串编码成零宽字符串
var enc = ZeroWidthCodec.Encode(); // 类调用：将字符串编码成零宽字符串

17. solid validation

public class MyClass
{
    [IsEmail] //可在appsetting.json中添加EmailDomainWhiteList配置邮箱域名白名单，逗号分隔
    public string Email { get; set; }

    [IsPhone]
    public string PhoneNumber { get; set; }

    [IsIPAddress]
    public string IP { get; set; }

    [MinValue(0, ErrorMessage = "年龄最小为0岁"), MaxValue(100, ErrorMessage = "年龄最大100岁")]
    public int Age { get; set; }

    [ComplexPassword]//密码复杂度校验
    public string Password { get; set; }

    [EnumOf] // 检测是否是有效枚举值
    public MyEnum MyEnum { get; set; }

    [MinItemsCount(1)] // 检测集合元素最少1个
    public List<string> Strs { get; set; }
}

18. HTML operations

List<string> srcs = "html".MatchImgSrcs().ToList();// 获取html字符串里所有的img标签的src属性
var imgTags = "html".MatchImgTags();//获取html字符串里的所有的img标签
var str="html".RemoveHtmlTag(); // 去除html标签
...

19. DateTime extension

double milliseconds = DateTime.Now.GetTotalMilliseconds();// 获取毫秒级时间戳
double microseconds = DateTime.Now.GetTotalMicroseconds();// 获取微秒级时间戳
double nanoseconds = DateTime.Now.GetTotalNanoseconds();// 获取纳秒级时间戳
double seconds = DateTime.Now.GetTotalSeconds();// 获取秒级时间戳
double minutes = DateTime.Now.GetTotalMinutes();// 获取分钟级时间戳
...

20. IP Address and URL

bool inRange = "192.168.2.2".IpAddressInRange("192.168.1.1","192.168.3.255");// 判断IP地址是否在这个地址段里
bool isPrivateIp = "172.16.23.25".IsPrivateIP();// 判断是否是私有地址
bool isExternalAddress = "http://baidu.com".IsExternalAddress();// 判断是否是外网的URL

//以下需要配置baiduAK
string isp = "114.114.114.114".GetISP(); // 获取ISP运营商信息
PhysicsAddress physicsAddress = "114.114.114.114".GetPhysicsAddressInfo().Result;// 获取详细地理信息对象
Tuple<string, List<string>> ipAddressInfo = "114.114.114.114".GetIPAddressInfo().Result;// 获取详细地理信息集合

21. Element de-duplication

var list = new List<MyClass>()
{
    new MyClass()
    {
        Email = "1@1.cn"
    },
    new MyClass()
    {
        Email = "1@1.cn"
    },
    new MyClass()
    {
        Email = "1@1.cn"
    }
};
List<MyClass> classes = list.DistinctBy(c => c.Email).ToList();
Console.WriteLine(classes.Count==1);//True

22. Enumeration Extensions

public enum MyEnum
{
    [Display(Name = "读")]
    [Description("读")]
    Read,

    [Display(Name = "写")]
    [Description("写")]
    Write
}

Dictionary<int, string> dic1 = typeof(MyEnum).GetDictionary();// 获取枚举值和字符串表示的字典映射
var dic2 = typeof(MyEnum).GetDescriptionAndValue();// 获取字符串表示和枚举值的字典映射
string desc = MyEnum.Read.GetDescription();// 获取Description标签
string display = MyEnum.Read.GetDisplay();// 获取Display标签的Name属性
var value = typeof(MyEnum).GetValue("Read");//获取字符串表示值对应的枚举值
string enumString = 0.ToEnumString(typeof(MyEnum));// 获取枚举值对应的字符串表示

23. Fixed-length queue and ConcurrentHashSet implementation

如果是.NET5及以上，推荐使用框架自带的Channel实现该功能

LimitedQueue<string> queue = new LimitedQueue<string>(32);// 声明一个容量为32个元素的定长队列
ConcurrentLimitedQueue<string> queue = new ConcurrentLimitedQueue<string>(32);// 声明一个容量为32个元素的线程安全的定长队列

var set = new ConcurrentHashSet<string>(); // 用法和hashset保持一致

24. reflection operating

MyClass myClass = new MyClass();
PropertyInfo[] properties = myClass.GetProperties();// 获取属性列表
myClass.SetProperty("Email","1@1.cn");//给对象设置值
myClass.DeepClone(); // 对象深拷贝，带嵌套层级的

25. Gets unique objects within a thread

CallContext<T>.SetData("db",dbContext);//设置线程内唯一对象
CallContext<T>.GetData("db");//获取线程内唯一对象

26. mail transmission

new Email()
{
    SmtpServer = "smtp.masuit.com",// SMTP服务器
    SmtpPort = 25, // SMTP服务器端口
    EnableSsl = true,//使用SSL
    Username = "admin@masuit.com",// 邮箱用户名
    Password = "123456",// 邮箱密码
    Tos = "10000@qq.com,10001@qq.com", //收件人
    Subject = "测试邮件",//邮件标题
    Body = "你好啊",//邮件内容
}.SendAsync(s =>
{
    Console.WriteLine(s);// 发送成功后的回调
});// 异步发送邮件

27. Simple image processing

ImageUtilities.CompressImage(@"F:\src\1.jpg", @"F:\dest\2.jpg");//无损压缩图片

"base64".SaveDataUriAsImageFile();// 将Base64编码转换成图片

Image image = Image.FromFile(@"D:\1.jpg");
image.MakeThumbnail(@"D:\2.jpg", 120, 80, ThumbnailCutMode.LockWidth);//生成缩略图

Bitmap bmp = new Bitmap(@"D:\1.jpg");
Bitmap newBmp = bmp.BWPic(bmp.Width, bmp.Height);//转换成黑白
Bitmap newBmp = bmp.CutAndResize(new Rectangle(0, 0, 1600, 900), 160, 90);//裁剪并缩放
bmp.RevPicLR(bmp.Width, bmp.Height);//左右镜像
bmp.RevPicUD(bmp.Width, bmp.Height);//上下镜像

var marker=ImageWatermarker(stream);
stream=maker.AddWatermark("水印文字","字体文件",字体大小,color,水印位置,边距); // 给图片添加水印
stream=maker.AddWatermark(水印图片,水印位置,边距,字体大小,字体); // 给图片添加水印

// 图像相似度对比
var hasher = new ImageHasher();
var hash1 = hasher.DifferenceHash256("图片1"); // 使用差分哈希算法计算图像的256位哈希
var hash2 = hasher.DifferenceHash256("图片2"); // 使用差分哈希算法计算图像的256位哈希
//var hash1 = hasher.AverageHash64("图片1"); // 使用平均值算法计算图像的64位哈希
//var hash2 = hasher.AverageHash64("图片2"); // 使用平均值算法计算图像的64位哈希
//var hash1 = hasher.DctHash("图片1"); // 使用DCT算法计算图像的64位哈希
//var hash2 = hasher.DctHash("图片2"); // 使用DCT算法计算图像的64位哈希
//var hash1 = hasher.MedianHash64("图片1"); // 使用中值算法计算给定图像的64位哈希
//var hash2 = hasher.MedianHash64("图片2"); // 使用中值算法计算给定图像的64位哈希
var sim=ImageHasher.Compare(hash1,hash2); // 图片的相似度，范围：[0,1]

var imageFormat=stream.GetImageType(); // 获取图片的真实格式

28. random number

Random rnd = new Random();
int num = rnd.StrictNext();//产生真随机数
double gauss = rnd.NextGauss(20,5);//产生正态高斯分布的随机数
var s = new NumberFormater(62).ToString(new Random().Next(100000, int.MaxValue));//生成随机字符串

29. Weight filtering function

var data=new List<WeightedItem<string>>()
{
     new WeightedItem<string>("A", 1),
     new WeightedItem<string>("B", 3),
     new WeightedItem<string>("C", 4),
     new WeightedItem<string>("D", 4),
};
var item=data.WeightedItem();//按权重选出1个元素
var list=data.WeightedItems(2);//按权重选出2个元素

var selector = new WeightedSelector<string>(new List<WeightedItem<string>>()
{
    new WeightedItem<string>("A", 1),
    new WeightedItem<string>("B", 3),
    new WeightedItem<string>("C", 4),
    new WeightedItem<string>("D", 4),
});
var item = selector.Select();//按权重选出1个元素
var list = selector.SelectMultiple(3);//按权重选出3个元素

30. EF Core supports AddOrUpdate method

/// <summary>
/// 按Id添加或更新文章实体
/// </summary>
public override Post SavePost(Post t)
{
    DataContext.Set<Post>().AddOrUpdate(t => t.Id, t);
    return t;
}

31. sensitive information mask

"13123456789".Mask(); // 131****5678
"admin@masuit.com".MaskEmail(); // a****n@masuit.com

32. set extension

var list = new List<string>()
{
    "1","3","3","3"
};
list.AddRangeIf(s => s.Length > 1, "1", "11"); // 将被添加元素中的长度大于1的元素添加到list
list.AddRangeIfNotContains("1", "11"); // 将被添加元素中不包含的元素添加到list
list.RemoveWhere(s => s.Length<1); // 将集合中长度小于1的元素移除
list.InsertAfter(0, "2"); // 在第一个元素之后插入
list.InsertAfter(s => s == "1", "2"); // 在元素"1"后插入
var dic = list.ToDictionarySafety(s => s); // 安全的转换成字典类型，当键重复时只添加一个键
var dic = list.ToConcurrentDictionary(s => s); // 转换成并发字典类型，当键重复时只添加一个键
var dic = list.ToDictionarySafety(s => s, s => s.GetHashCode()); // 安全的转换成字典类型，当键重复时只添加一个键
dic.AddOrUpdate("4", 4); // 添加或更新键值对
dic.AddOrUpdate(new Dictionary<string, int>()
{
    ["5"] = 5,["55"]=555
}); // 批量添加或更新键值对
dic.AddOrUpdate("5", 6, (s, i) => 66); // 如果是添加，则值为6，若更新则值为66
dic.AddOrUpdate("5", 6, 666); // 如果是添加，则值为6，若更新则值为666
dic.GetOrAdd("7",77); // 字典获取或添加元素
dic.GetOrAdd("7",()=>77); // 字典获取或添加元素
dic.AsConcurrentDictionary(); // 普通字典转换成并发字典集合
var table=list.ToDataTable(); // 转换成DataTable类型
table.AddIdentityColumn(); //给DataTable增加一个自增列
table.HasRows(); // 检查DataTable 是否有数据行
table.ToList<T>(); // datatable转List
var set = list.ToHashSet(s=>s.Name);// 转HashSet
var cts = new CancellationTokenSource(100); //取消口令
await list.ForeachAsync(async i=>{
    await Task.Delay(100);
    Console.WriteLine(i);
},cts.Token); // 异步foreach

await list.ForAsync(async (item,index)=>{
    await Task.Delay(100);
    Console.WriteLine(item+"_"+index);
},cts.Token); // 异步for，带索引编号
await list.SelectAsync(async i=>{
    await Task.Delay(100);
    return i*10;
}); // 异步Select
await list.SelectAsync(async (item,index)=>{
    await Task.Delay(100);
    return item*10;
}); // 异步Select，带索引编号
string s=list.Join(",");//将字符串集合连接成逗号分隔的单字符串
var max=list.MaxOrDefault(); // 取最大值，当集合为空的时候不会报错
var max=list.MaxOrDefault(selector); // 取最大值，当集合为空的时候不会报错
var max=list.MaxOrDefault(selector,default); // 取最大值，当集合为空的时候不会报错
var max=list.MinOrDefault(); // 取最小值，当集合为空的时候不会报错
var max=list.MinOrDefault(selector); // 取最小值，当集合为空的时候不会报错
var max=list.MinOrDefault(selector,default); // 取最小值，当集合为空的时候不会报错
var stdDev=list.Select(s=>s.ConvertTo<int>()).StandardDeviation(); // 求标准差

var pages=queryable.ToPagedList(1,10); // 分页查询
var pages=await queryable.ToPagedListAsync(1,10); // 分页查询

var nums=Enumerable.Range(1, 10).ExceptBy(Enumerable.Range(5, 10), i => i); // 按字段取差集
var nums=Enumerable.Range(1, 10).IntersectBy(Enumerable.Range(5, 10), i => i); // 按字段取交集
var nums=Enumerable.Range(1, 10).SequenceEqual(Enumerable.Range(5, 10), i => i); // 判断序列相等
var nums=Enumerable.Range(1, 10).OrderByRandom(); // 随机排序

// 多个集合取交集
var list=new List<List<MyClass>>(){
    new List<MyClass>(){
        new MyClass(){Name="aa",Age=11},
        new MyClass(){Name="bb",Age=12},
        new MyClass(){Name="cc",Age=13},
    },
    new List<MyClass>(){
        new MyClass(){Name="bb",Age=12},
        new MyClass(){Name="cc",Age=13},
        new MyClass(){Name="dd",Age=14},
    },
    new List<MyClass>(){
        new MyClass(){Name="cc",Age=13},
        new MyClass(){Name="dd",Age=14},
        new MyClass(){Name="ee",Age=15},
    },
};
var sect=list.IntersectAll(m=>m.Name); // new MyClass(){Name="cc",Age=13}

var list=new List<List<int>>(){
    new(){1,2,3},
    new(){2,3,4},
    new(){3,4,5}
};
var sect=list.IntersectAll();// [3]

// 集合元素改变其索引位置
list.ChangeIndex(item,3); // 将元素item的索引位置变为第3个
list.ChangeIndex(t=>t.Id=="123",2); // 将id为123的元素的索引位置变为第2个

33. MIME type

var mimeMapper = new MimeMapper();
var ext = mimeMapper.GetExtensionFromMime("image/jpeg"); // .jpg
var mime = mimeMapper.GetMimeFromExtension(".jpg"); // image/jpeg

34. date-time extension

DateTime.Now.GetTotalSeconds(); // 获取该时间相对于1970-01-01 00:00:00的秒数
DateTime.Now.GetTotalMilliseconds(); // 获取该时间相对于1970-01-01 00:00:00的毫秒数
DateTime.Now.GetTotalMicroseconds(); // 获取该时间相对于1970-01-01 00:00:00的微秒数
DateTime.Now.GetTotalNanoseconds(); // 获取该时间相对于1970-01-01 00:00:00的纳秒数
var indate=DateTime.Parse("2020-8-3").In(DateTime.Parse("2020-8-2"),DateTime.Parse("2020-8-4"));//true
DateTime time="2021-1-1 8:00:00".ToDateTime(); //字符串转DateTime

//时间段计算工具
var range = new DateTimeRange(DateTime.Parse("2020-8-3"), DateTime.Parse("2020-8-5"));
range.Union(DateTime.Parse("2020-8-4"), DateTime.Parse("2020-8-6")); //连接两个时间段，结果：2020-8-3~2020-8-6
range.In(DateTime.Parse("2020-8-3"), DateTime.Parse("2020-8-6"));//判断是否在某个时间段内，true
var (intersected,range2) = range.Intersect(DateTime.Parse("2020-8-4"), DateTime.Parse("2020-8-6"));//两个时间段是否相交，(true,2020-8-3~2020-8-4)
range.Contains(DateTime.Parse("2020-8-3"), DateTime.Parse("2020-8-4"));//判断是否包含某个时间段，true
...

35. flow related

stream.SaveAsMemoryStream(); // 任意流转换成内存流
stream.ToArray(); // 任意流转换成二进制数组
stream.ToArrayAsync(); // 任意流转换成二进制数组
stream.ShuffleCode(); // 流洗码，在流的末端随即增加几个空字节，重要数据请谨慎使用，可能造成流损坏

// 池化内存流，用法与MemorySteam保持一致
using var ms=PooledMemoryStream();

// 大型内存流,最大可支持1TB内存数据，推荐当数据流大于2GB时使用，用法与MemorySteam保持一致
using var ms=LargeMemoryStream();

//文件流快速复制
FileStream fs = new FileStream(@"D:\boot.vmdk", FileMode.OpenOrCreate, FileAccess.ReadWrite);
{
        //fs.CopyToFile(@"D:\1.bak");//同步复制大文件
        fs.CopyToFileAsync(@"D:\1.bak");//异步复制大文件
        string md5 = fs.GetFileMD5Async().Result;//异步获取文件的MD5
        string sha1 = fs.GetFileSha1();//异步获取文件的SHA1
}
memoryStream.SaveFile("filename"); // 将内存流转储成文件

36. numeric conversion

1.2345678901.Digits8(); // 将小数截断为8位
1.23.ConvertTo<int>(); // 小数转int
1.23.ConvertTo<T>(); // 小数转T基本类型
bool b=1.23.TryConvertTo<T>(out result); // 小数转T基本类型
var num=1.2345.ToDecimal(2); //转decimal并保留两位小数

37. INI configuration file operation (Windows only)

INIFile ini=new INIFile("filename.ini");
ini.IniWriteValue(section,key,value); // 写值
ini.IniReadValue(section,key); // 读值
ini.ClearAllSection(); // 清空所有配置节
ini.ClearSection(section); // 清空配置节

38. Radar Chart Calculation Engine

Application scenario: Calculate the similarity between two polygons, user portraits and the like

var points=RadarChartEngine.ComputeIntersection(chart1,chart2); //获取两个多边形的相交区域
points.ComputeArea(); //计算多边形面积

39. Implementation of tree structure

Basic interface class:
ITreeChildren: Interface with Children attribute
ITreeParent: Interface with Parent attribute
ITree: Inherits ITreeParent and ITreeChildren, and adds the Name attribute

Related expansion methods:

trees.Filter(func); // 从树形集合中过滤
trees.Flatten(); // 将数据平铺开
tree.AllChildren(); // 获取所有的子级
tree.AllParent(); // 获取所有的父级
tree.IsRoot(); // 是否是根节点
tree.IsLeaf(); // 是否是叶子节点
tree.Level(); // 所处深度/层级
tree.Path(); // 全路径

var tree=list.ToTree(c => c.Id, c => c.Pid);//继承自ITreeParent<T>, ITreeChildren<T>的集合转换成树形结构
var tree=list.ToTreeGeneral(c => c.Id, c => c.Pid);//一般的集合转换成树形结构

40. Simple Excel export

需要额外依赖包：Masuit.Tools.Excel

var stream=list.Select(item=>new{
    姓名=item.Name,
    年龄=item.Age,
    item.Gender,
    Avatar=Image.FromStream(filestream) //图片列
}).ToDataTable().ToExcel("Sheet1"); //自定义列名导出
var stream=list.ToDataTable("Sheet1").ToExcel("文件密码");

Some agreed rules:

1. Picture columns support Stream, Bitmap, IEnumerable, IEnumerable, IDictionary<string,Stream>, IDictionary <string,MemoryStream>, IDictionary<string,Bitmap> types;
2. Among them, if it is a picture column of type IDictionary, the key of the dictionary is the full url of the picture hyperlink;
3. Default field names are exported as column names;
4. If list is a specific strong type, the Description tag of each field will be searched first by default. If there is a Description tag, the Description tag will be displayed as the column name
5. The ToExcel method supports direct calls to DataTable, List, Dictionary<string, DataTable> types

41. EFCore entity comparison function

Get changes to specified entities

var changes=dbContext.GetChanges<Post>();//获取变更字段信息
var added=dbContext.GetAdded<Post>();//获取添加的实体字段信息
var removed=dbContext.GetRemoved<Post>();//获取被移除的实体字段信息
var allchanges=dbContext.GetAllChanges<Post>();//获取增删改的实体字段信息

Get changes to all entities

var changes=dbContext.GetChanges();//获取变更字段信息
var added=dbContext.GetAdded();//获取添加的实体字段信息
var removed=dbContext.GetRemoved();//获取被移除的实体字段信息
var allchanges=dbContext.GetAllChanges();//获取增删改的实体字段信息

Comparison information includes attribute information, old values, new values, entity information, key information, change status, etc.

42. Chain calls are supported for any type

a.Next(func1).Next(func2).Next(func3);
"123".Next(s=>s.ToInt32()).Next(x=>x*2).Next(x=>Math.Log(x));

43. Newtonsoft.Json's contract interpreter that only allows field deserialization behavior

DeserializeOnlyContractResolver

This interpreter takes effect during deserialization for class attributes marked by DeserializeOnlyJsonPropertyAttribute and ignores them during serialization

public class ClassDto
    {
        [DeserializeOnlyJsonProperty]
        public string MyProperty { get; set; }

        public int Num { get; set; }
    }

    JsonConvert.SerializeObject(new MyClass(),new JsonSerializerSettings()
    {
        ContractResolver = new DeserializeOnlyContractResolver() // 配置使用DeserializeOnlyContractResolver解释器
    });

If WebAPI is used globally:

        //在Startup.ConfigureServices中
        services.AddMvc().AddNewtonsoftJson(options =>
             {
                 var resolver = new DeserializeOnlyContractResolver();
                 resolver.NamingStrategy = new CamelCaseNamingStrategy();
                 options.SerializerSettings.ContractResolver = resolver;
             });

FallbackJsonPropertyResolver

The interpreter sets multiple aliases for a certain property, and supports multiple alias keys to bind during deserialization, making up for the shortcoming that the official JsonProperty alias property can only set a single alias

    public class ClassDto
    {
        [FallbackJsonProperty("MyProperty","a","b")]
        public string MyProperty { get; set; }

        public int Num { get; set; }
    }

    JsonConvert.SerializeObject(new MyClass(),new JsonSerializerSettings()
    {
        ContractResolver = new FallbackJsonPropertyResolver() // 配置使用FallbackJsonPropertyResolver解释器
    });

CompositeContractResolver

The interpreter is a fusion of DeserializeOnlyContractResolver and FallbackJsonPropertyResolver

44. ASP.NET Core Action supports both queryString, form and json request types model binder BodyOrDefaultModelBinder

Usage:

引入包：Masuit.Tools.AspNetCore

PM> Install-Package Masuit.Tools.AspNetCore

Startup configuration:

    services.AddMvc(options =>
        {
             options.ModelBinderProviders.InsertBodyOrDefaultBinding();
        })

在 action 的参数模型前打上标记：[FromBodyOrDefault]即可，当然也可以省略，示例代码如下：

        [HttpGet("query"),HttpPost("query")]
        public IActionResult Query([FromBodyOrDefault]QueryModel query)
        {
            return Ok(...);
        }

        [HttpGet("query"),HttpPost("query")]
        public IActionResult Query([FromBodyOrDefault]int id,[FromBodyOrDefault]string name)
        {
            return Ok(...);
        }

45. String SimHash Similarity Algorithm

var dis="12345678".HammingDistance("1234567");
var dis=new SimHash("12345678").HammingDistance(new SimHash("1234567"));

46. Real file type detection

// 多种方式，任君调用
var detector=new FileInfo(filepath).DetectFiletype();
//var detector=File.OpenRead(filepath).DetectFiletype();
//var detector=FileSignatureDetector.DetectFiletype(filepath);
detector.Precondition;//基础文件类型
detector.Extension;//真实扩展名
detector.MimeType;//MimeType
detector.FormatCategories;//格式类别

Default supported file types

ResumeFileResult with support for breakpoint resumes and multi-threaded downloads from Asp.Net MVC and ASP.NET Core

Use breakpoint resume and multi-threaded download support when transferring file data through MVC/WebAPI applications in ASP.NET Core.

它提供了ETag标头以及Last-Modified标头。 它还支持以下前置条件标头：If-Match，If-None-Match，If-Modified-Since，If-Unmodified-Since，If-Range。

Support ASP.NET Core 2.0+

Starting from. NET Core 2.0, ASP.NET Core internally supports breakpoint resumes. Therefore, only some extensions have been made to FileResult. Only part of the "Content-Disposition" Inline is left. All code relies on the underlying. NET classes.

how to use

.NET Framework

在你的控制器中，你可以像在FileResult一样的方式使用它。

using Masuit.Tools.Mvc;
using Masuit.Tools.Mvc.ResumeFileResult;

private readonly MimeMapper mimeMapper=new MimeMapper(); // 推荐使用依赖注入

public ActionResult ResumeFileResult()
{
    var path = Server.MapPath("~/Content/test.mp4");
    return new ResumeFileResult(path, mimeMapper.GetMimeFromPath(path), Request);
}

public ActionResult ResumeFile()
{
    return this.ResumeFile("~/Content/test.mp4", mimeMapper.GetMimeFromPath(path), "test.mp4");
}

public ActionResult ResumePhysicalFile()
{
    return this.ResumePhysicalFile(@"D:/test.mp4", mimeMapper.GetMimeFromPath(@"D:/test.mp4"), "test.mp4");
}

ASP.NET Core

要使用 ResumeFileResults，必须在Startup.cs的ConfigureServices方法调用中配置服务：

using Masuit.Tools.AspNetCore.ResumeFileResults.Extensions;

public void ConfigureServices(IServiceCollection services)
{
    services.AddResumeFileResult();
}

然后在你的控制器中，你可以像在FileResult一样的方式使用它。

using Masuit.Tools.AspNetCore.ResumeFileResults.Extensions;

private const string EntityTag = "\"TestFile\"";

private readonly IHostingEnvironment _hostingEnvironment;

private readonly DateTimeOffset _lastModified = new DateTimeOffset(2016, 1, 1, 0, 0, 0, TimeSpan.Zero);

/// <summary>
///
/// </summary>
/// <param name="hostingEnvironment"></param>
public TestController(IHostingEnvironment hostingEnvironment)
{
    _hostingEnvironment = hostingEnvironment;
}

[HttpGet("content/{fileName}/{etag}")]
public IActionResult FileContent(bool fileName, bool etag)
{
    string webRoot = _hostingEnvironment.WebRootPath;
    var content = System.IO.File.ReadAllBytes(Path.Combine(webRoot, "TestFile.txt"));
    ResumeFileContentResult result = this.ResumeFile(content, "text/plain", fileName ? "TestFile.txt" : null, etag ? EntityTag : null);
    result.LastModified = _lastModified;
    return result;
}

[HttpGet("content/{fileName}")]
public IActionResult FileContent(bool fileName)
{
    string webRoot = _hostingEnvironment.WebRootPath;
    var content = System.IO.File.ReadAllBytes(Path.Combine(webRoot, "TestFile.txt"));
    var result = new ResumeFileContentResult(content, "text/plain")
    {
        FileInlineName = "TestFile.txt",
        LastModified = _lastModified
    };
    return result;
}

[HttpHead("file")]
public IActionResult FileHead()
{
    ResumeVirtualFileResult result = this.ResumeFile("TestFile.txt", "text/plain", "TestFile.txt", EntityTag);
    result.LastModified = _lastModified;
    return result;
}

[HttpPut("file")]
public IActionResult FilePut()
{
    ResumeVirtualFileResult result = this.ResumeFile("TestFile.txt", "text/plain", "TestFile.txt", EntityTag);
    result.LastModified = _lastModified;
    return result;
}

[HttpGet("stream/{fileName}/{etag}")]
public IActionResult FileStream(bool fileName, bool etag)
{
    string webRoot = _hostingEnvironment.WebRootPath;
    FileStream stream = System.IO.File.OpenRead(Path.Combine(webRoot, "TestFile.txt"));

    ResumeFileStreamResult result = this.ResumeFile(stream, "text/plain", fileName ? "TestFile.txt" : null, etag ? EntityTag : null);
    result.LastModified = _lastModified;
    return result;
}

[HttpGet("stream/{fileName}")]
public IActionResult FileStream(bool fileName)
{
    string webRoot = _hostingEnvironment.WebRootPath;
    FileStream stream = System.IO.File.OpenRead(Path.Combine(webRoot, "TestFile.txt"));

    var result = new ResumeFileStreamResult(stream, "text/plain")
    {
        FileInlineName = "TestFile.txt",
        LastModified = _lastModified
    };

    return result;
}

[HttpGet("physical/{fileName}/{etag}")]
public IActionResult PhysicalFile(bool fileName, bool etag)
{
    string webRoot = _hostingEnvironment.WebRootPath;

    ResumePhysicalFileResult result = this.ResumePhysicalFile(Path.Combine(webRoot, "TestFile.txt"), "text/plain", fileName ? "TestFile.txt" : null, etag ? EntityTag : null);
    result.LastModified = _lastModified;
    return result;
}

[HttpGet("physical/{fileName}")]
public IActionResult PhysicalFile(bool fileName)
{
    string webRoot = _hostingEnvironment.WebRootPath;

    var result = new ResumePhysicalFileResult(Path.Combine(webRoot, "TestFile.txt"), "text/plain")
    {
        FileInlineName = "TestFile.txt",
        LastModified = _lastModified
    };

    return result;
}

[HttpGet("virtual/{fileName}/{etag}")]
public IActionResult VirtualFile(bool fileName, bool etag)
{
    ResumeVirtualFileResult result = this.ResumeFile("TestFile.txt", "text/plain", fileName ? "TestFile.txt" : null, etag ? EntityTag : null);
    result.LastModified = _lastModified;
    return result;
}

[HttpGet("virtual/{fileName}")]
public IActionResult VirtualFile(bool fileName)
{
    var result = new ResumeVirtualFileResult("TestFile.txt", "text/plain")
    {
        FileInlineName = "TestFile.txt",
        LastModified = _lastModified
    };
    return result;
}

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