用处及效果

准备工作
这个比较简单,对label扩展,重绘划线即可
开始
添加一个类UCSplitLabel ,继承 Label
代码比较少
// ***********************************************************************
// Assembly : HZH_Controls
// Created : 2019-10-09
//
// ***********************************************************************
// <copyright file="UCSplitLabel.cs">
// Copyright by Huang Zhenghui(黄正辉) All, QQ group:568015492 QQ:623128629 Email:623128629@qq.com
// </copyright>
//
// Blog: https://www.cnblogs.com/bfyx
// GitHub:https://github.com/kwwwvagaa/NetWinformControl
// gitee:https://gitee.com/kwwwvagaa/net_winform_custom_control.git
//
// If you use this code, please keep this note.
// ***********************************************************************
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.ComponentModel;
namespace HZH_Controls.Controls
{
/// <summary>
/// Class UCSplitLabel.
/// Implements the <see cref="System.Windows.Forms.Label" />
/// </summary>
/// <seealso cref="System.Windows.Forms.Label" />
public class UCSplitLabel : Label
{
/// <summary>
/// Gets or sets the text.
/// </summary>
/// <value>The text.</value>
[Localizable(true)]
public override string Text
{
get
{
return base.Text;
}
set
{
base.Text = value;
ResetMaxSize();
}
}
/// <summary>
/// 获取或设置控件显示的文字的字体。
/// </summary>
/// <value>The font.</value>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" />
/// <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
[Localizable(true)]
public override Font Font
{
get
{
return base.Font;
}
set
{
base.Font = value;
ResetMaxSize();
}
}
/// <summary>
/// 获取或设置大小,该大小是 <see cref="M:System.Windows.Forms.Control.GetPreferredSize(System.Drawing.Size)" /> 可以指定的下限。
/// </summary>
/// <value>The minimum size.</value>
[Localizable(true)]
public override Size MinimumSize
{
get
{
return base.MinimumSize;
}
set
{
base.MinimumSize = value;
ResetMaxSize();
}
}
/// <summary>
/// 获取或设置大小,该大小是 <see cref="M:System.Windows.Forms.Control.GetPreferredSize(System.Drawing.Size)" /> 可以指定的上限。
/// </summary>
/// <value>The maximum size.</value>
[Localizable(true)]
public override Size MaximumSize
{
get
{
return base.MaximumSize;
}
set
{
base.MaximumSize = value;
ResetMaxSize();
}
}
/// <summary>
/// 获取或设置一个值,该值指示是否自动调整控件的大小以完整显示其内容。
/// </summary>
/// <value><c>true</c> if [automatic size]; otherwise, <c>false</c>.</value>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" />
/// <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
[EditorBrowsable(EditorBrowsableState.Never), Browsable(false)]
public override bool AutoSize
{
get
{
return base.AutoSize;
}
set
{
base.AutoSize = value;
}
}
/// <summary>
/// The line color
/// </summary>
private Color lineColor = LineColors.Light;
/// <summary>
/// Gets or sets the color of the line.
/// </summary>
/// <value>The color of the line.</value>
public Color LineColor
{
get { return lineColor; }
set
{
lineColor = value;
Invalidate();
}
}
/// <summary>
/// Resets the maximum size.
/// </summary>
private void ResetMaxSize()
{
using (var g = this.CreateGraphics())
{
var _width = Width;
var size = g.MeasureString(string.IsNullOrEmpty(Text) ? "A" : Text, Font);
if (MinimumSize.Height != (int)size.Height)
MinimumSize = new Size(base.MinimumSize.Width, (int)size.Height);
if (MaximumSize.Height != (int)size.Height)
MaximumSize = new Size(base.MaximumSize.Width, (int)size.Height);
this.Width = _width;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="UCSplitLabel"/> class.
/// </summary>
public UCSplitLabel()
: base()
{
if (ControlHelper.IsDesignMode())
{
Text = "分割线";
Font = new Font("微软雅黑", 8f);
}
this.AutoSize = false;
Padding = new Padding(20, 0, 0, 0);
MinimumSize = new System.Drawing.Size(150, 10);
PaddingChanged += UCSplitLabel_PaddingChanged;
this.Width = 200;
}
/// <summary>
/// Handles the PaddingChanged event of the UCSplitLabel control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
void UCSplitLabel_PaddingChanged(object sender, EventArgs e)
{
if (Padding.Left < 20)
{
Padding = new Padding(20, Padding.Top, Padding.Right, Padding.Bottom);
}
}
/// <summary>
/// Handles the <see cref="E:Paint" /> event.
/// </summary>
/// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.PaintEventArgs" />。</param>
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
var g = e.Graphics;
g.SetGDIHigh();
var size = g.MeasureString(Text, Font);
g.DrawLine(new Pen(new SolidBrush(lineColor)), new PointF(1, Padding.Top + (this.Height - Padding.Top - Padding.Bottom) / 2), new PointF(Padding.Left - 2, Padding.Top + (this.Height - Padding.Top - Padding.Bottom) / 2));
g.DrawLine(new Pen(new SolidBrush(lineColor)), new PointF(Padding.Left + size.Width + 1, Padding.Top + (this.Height - Padding.Top - Padding.Bottom) / 2), new PointF(Width - Padding.Right, Padding.Top + (this.Height - Padding.Top - Padding.Bottom) / 2));
}
}
}
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
HZHControls官网:http://www.hzhcontrols.com
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