C # Inherits basic controls implementing custom Controls (reprint)

There are three categories of custom controls: 1. Composite Control: A combination of basic controls. Inherit from UserControl 2. extended Control: Inherits basic controls, extending some properties and events. For example, inherit Button 3. custom controls: directly inherit from Control The first situation is easier to get started, but also more commonly used, which also has a lot of skills, slowly summed up. For example, to build a separate class library project, will not cause conflict. How to defer the event code to the user. Get started with extension controls today.

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Step one: Here you first build a Windows Control Library project.

Step Two: Create a new user control, modify the code ( Note the comment out .) code in the Designer.cs file )

Extended Button

Using System;

Using System.Collections.Generic;

Using System.ComponentModel;

Using System.Drawing;

Using System.Data;

Using System.Linq;

Using System.Text;

Using System.Windows.Forms;

Namespace Winformcontrollibrary

{

public partial class Ucbutton:button

{

Public Ucbutton ()

{

InitializeComponent ();

}

Creates the private variable that would store the value of your

Property.

private int varvalue;

Declares the property.

public int ButtonValue

{

Sets the method for retrieving the value of your property.

Get

{

return varvalue;

}

Sets the method for setting the value of your property.

Set

{

Varvalue = value;

}

}

}

}

Namespace Winformcontrollibrary

{

Partial class Ucbutton

{

<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 Component 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 ()

{

components = new System.ComponentModel.Container ();

to comment out this sentence

This. AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

}

#endregion

}

}

Extended Label

Using System;

Using System.Collections.Generic;

Using System.ComponentModel;

Using System.Drawing;

Using System.Data;

Using System.Linq;

Using System.Text;

Using System.Windows.Forms;

Namespace Winformcontrollibrary

{

public partial class Uclabel:label

{

Public Uclabel ()

{

InitializeComponent ();

}

protected override void Onmouseenter (EventArgs e)

{

Base. Onmouseenter (e);

This. Font = new Font (" Arial ", 10F, fontstyle.underline);

}

protected override void OnMouseLeave (System.EventArgs e)

{

Base. OnMouseLeave (e);

This. Font = new Font (" Arial ", 10F, fontstyle.regular);

}

}

}

Step three: Add a project reference in another Windows forms project. After compiling, you see the generated custom control in the Toolbox. url:http://greatverve.cnblogs.com/archive/2012/02/16/user-control-inherit.html Reference MSDN:

http://msdn.microsoft.com/zh-cn/library/5h0k2e6x (v=vs.80). aspx

http://blog.csdn.net/yysyangyangyangshan/article/details/7078471

C # Inherits basic controls implementing custom Controls (reprint)