准备工作
这个窗体继承子基类窗体FrmBase,如果你对FrmBase还不了解,请移步 (十七)c#Winform自定义控件-基类窗体 查看
开始
添加一个Form,命名FrmTransparent,继承自FrmBase
代码不多,直接上完整代码了
// 版权所有 黄正辉 交流群:568015492 QQ:623128629
// 文件名称:FrmTransparent.cs
// 创建日期:2019-08-15 16:05:00
// 功能描述:FrmTransparent
// 项目地址:https://gitee.com/kwwwvagaa/net_winform_custom_control
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;
namespace HZH_Controls.Forms
{
public partial class FrmTransparent : FrmBase
{
private const int WM_ACTIVATE = 6;
private const int WM_ACTIVATEAPP = 28;
private const int WM_NCACTIVATE = 134;
private const int WA_INACTIVE = 0;
private const int WM_MOUSEACTIVATE = 33;
private const int MA_NOACTIVATE = 3;
public FrmBase frmchild
{
get;
set;
}
public FrmTransparent()
{
InitializeComponent();
base.SetStyle(ControlStyles.UserPaint, true);
base.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
base.SetStyle(ControlStyles.DoubleBuffer, true);
MethodInfo method = base.GetType().GetMethod("SetStyle", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.InvokeMethod);
method.Invoke(this, BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.InvokeMethod, null, new object[]
{
ControlStyles.Selectable,
false
}, Application.CurrentCulture);
}
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
base.ShowInTaskbar = false;
base.ShowIcon = true;
}
[DllImport("user32.dll")]
private static extern IntPtr SetActiveWindow(IntPtr handle);
protected override void WndProc(ref Message m)
{
if (m.Msg == 33)
{
m.Result = new IntPtr(3);
}
else
{
if (m.Msg == 134)
{
if (((int)m.WParam & 65535) != 0)
{
if (m.LParam != IntPtr.Zero)
{
FrmTransparent.SetActiveWindow(m.LParam);
}
else
{
FrmTransparent.SetActiveWindow(IntPtr.Zero);
}
}
}
else if (m.Msg == 2000)
{
}
base.WndProc(ref m);
}
}
private void FrmTransparent_Load(object sender, EventArgs e)
{
if (frmchild != null)
{
frmchild.IsShowMaskDialog = false;
var dia = frmchild.ShowDialog(this);
this.DialogResult = dia;
}
}
}
}
namespace HZH_Controls.Forms
{
partial class FrmTransparent
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(FrmTransparent));
this.SuspendLayout();
//
// FrmTransparent
//
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
this.BackColor = System.Drawing.Color.Black;
this.ClientSize = new System.Drawing.Size(284, 262);
this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
this.Name = "FrmTransparent";
this.Opacity = 0.5D;
this.ShowIcon = false;
this.ShowInTaskbar = false;
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
this.Text = "FrmTransparent";
this.Load += new System.EventHandler(this.FrmTransparent_Load);
this.ResumeLayout(false);
}
#endregion
}
}
主要就是构造函数和load事件里面的那几句话
用处及效果
用途:一般用在蒙版,比如弹出窗口的时候,显示一个半透明蒙版
最后的话
如果你喜欢的话,请到 https://gitee.com/kwwwvagaa/net_winform_custom_control 点个星 星吧
作者:冰封一夏
出处: http://www.hzhcontrols.com/doc.html
本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,
且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。
GitHub:https://github.com/kwwwvagaa/NetWinformControl
码云:https://gitee.com/kwwwvagaa/net_winform_custom_control.git