C#.Net用户自定义控件制作教程

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C#.Net用户自定义控件制作教程

2013年09月02日 ⁄ 综合 ⁄ 共 2506字 ⁄ 字号小中大 ⁄ 评论关闭

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

/// <summary> 
/// C#.Net 设计用户自定义控件 
/// C#制作用户自定义控件 (by www.vjsdn.net 易学网) 
/// </summary> 
/// </summary> 
[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 = this.Name;
   }

private EventHandler _OnButtonClick = null;

private string _MyCatpionText = "ucButton1";

/// <summary> 
/// 按钮标题 
/// </summary> 
   [EditorBrowsable(EditorBrowsableState.Always)]
   [Browsable(true)]
   [DefaultValue("ucButton1")]
public string MyCatpionText
   {
get { return _MyCatpionText; }
set { _MyCatpionText = value; lblCaption.Text = _MyCatpionText; }
   }

/// <summary> 
/// 用户自定义Click事件 
/// </summary> 
   [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;
   }

/// <summary> 
/// 还原按钮状态 
/// </summary> 
   public void DoHideFocusedTag()
   {
this.pictureBox1.Image = global::vjsdn.CustomControl.Properties.Resources.GrayTag;
this.lblUnderLine.Visible = false;
      lblCaption.ForeColor = Color.Black;
   }

/// <summary> 
/// 设计按钮为焦点状态 
/// </summary> 
   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);
   }

}