C#.Net用户自定义控件制作教程

Net用户自定义控件继承UserControl类，设计很简单的，像平时在窗体上拖控件一样。

下面跟着我一步步做：

1. 建立一个工程，添加用户控件。

2.在打开的窗体内输入控件名称，如:"ucButton"，按确定按钮。接下来在空白区域拖放3个.Net控件。

如下图：

3.编码

代码

///

/// C#.Net 设计用户自定义控件

/// C#制作用户自定义控件 (by https://www.360docs.net/doc/f110539487.html, 易学网)

///

///

[ToolboxBitmap(typeof(CustomControl.ucButton), "ucButton.bmp")]

public partial class ucButton : UserControl

{

private bool _IsFocused = false; //标记按钮是否为焦点状态

public ucButton()

{

InitializeComponent();

this.DoHideFocusedTag();

this.MyCatpionText = https://www.360docs.net/doc/f110539487.html,;

}

private EventHandler _OnButtonClick = null;

private string _MyCatpionText = "ucButton1";

///

///按钮标题

///

[EditorBrowsable(EditorBrowsableState.Always)]

[Browsable(true)]

[DefaultValue("ucButton1")]

public string MyCatpionText

{

get { return _MyCatpionText; }

set { _MyCatpionText = value; lblCaption.Text = _MyCatpionText; } }

///

///用户自定义Click事件

///

[EditorBrowsable(EditorBrowsableState.Always)]

[Browsable(true)]

public event EventHandler OnButtonClick

{

add { _OnButtonClick += new EventHandler(value); }

remove { _OnButtonClick -= new EventHandler(value); }

}

private void lblCaption_Click(object sender, EventArgs e)

{

//转移Click事件, 触发用户自定义事件

if (_OnButtonClick != null) _OnButtonClick(this, e);

}

private void lblCaption_MouseDown(object sender, MouseEventArgs e) {

if (_IsFocused)

{

lblCaption.Font = new Font(lblCaption.Font.FontFamily, lblCaption.Font.Size, FontStyle.Bold);

}

}

private void lblCaption_MouseUp(object sender, MouseEventArgs e) {

if (_IsFocused)

{

lblCaption.Font = new Font(lblCaption.Font.FontFamily, lblCaption.Font.Size, FontStyle.Regular);

}

}

private void ucButton_SizeChanged(object sender, EventArgs e)

{

lblUnderLine.Top = this.Height - 1;

lblUnderLine.Width = this.Width - 15;

}

///

///还原按钮状态

///

public void DoHideFocusedTag()

{

this.pictureBox1.Image = global::vjsdn.CustomControl.Properties.Resources.GrayTag;

this.lblUnderLine.Visible = false;

lblCaption.ForeColor = Color.Black;

}

///

///设计按钮为焦点状态

///

public void DoShowFocusedTag()

{

this.pictureBox1.Image = global::vjsdn.CustomControl.Properties.Resources.FosedTag;

this.lblUnderLine.Visible = true;

lblCaption.ForeColor = Color.Blue;

}

private void ucButton_MouseEnter(object sender, EventArgs e)

{

if (this.Parent != null)

{

foreach (Control c in this.Parent.Controls)

{

if (c is ucButton) (c as ucButton).DoHideFocusedTag();

}

}

this.DoShowFocusedTag();

_IsFocused = true;

}

[EditorBrowsable(EditorBrowsableState.Always)]

[Browsable(true)]

[Description("")]

public Label MyCaption

{

get { return lblCaption; }

}

private void lblCaption_MouseEnter(object sender, EventArgs e)

{

this.ucButton_MouseEnter(sender, e);

}

}

4. 按F5编译项目，建立一个测试窗体，在控件工具栏会看到有个齿轮图标的项目。

在窗体上拖3个ucButton。

5.设置按钮标题及事件。

6.运行程序