PaintEventHandler 委托
**命名空间:**System.Windows.Forms
**程序集:**System.Windows.Forms（在 system.windows.forms.dll 中）
语法
声明
Public Delegate Sub PaintEventHandler ( _
sender As Object, _
e As PaintEventArgs _
)
用法
Dim instance As New PaintEventHandler(AddressOf HandlerMethod)
public delegate void PaintEventHandler (
Object sender,
PaintEventArgs e
)
public delegate void PaintEventHandler (
Object^ sender,
PaintEventArgs^ e
)
/** @delegate */
public delegate void PaintEventHandler (
Object sender,
PaintEventArgs e
)
JScript 支持使用委托，但不支持进行新的声明。
参数
- sender
事件源。
- e
包含事件数据的 PaintEventArgs。
备注
当创建 PaintEventHandler 委托时，将标识处理事件的方法。若要使该事件与事件处理程序相关联，请将该委托的一个实例添加到事件中。除非移除了该委托，否则每当发生该事件时就调用事件处理程序。有关用委托处理事件的更多信息，请参见 事件和委托。
示例
' This example creates a PictureBox control on the form and draws to it.
' This example assumes that the Form_Load event handler method is connected
' to the Load event of the form.
Private pictureBox1 As New PictureBox()
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
' Dock the PictureBox to the form and set its background to white.
pictureBox1.Dock = DockStyle.Fill
pictureBox1.BackColor = Color.White
' Connect the Paint event of the PictureBox to the event handler method.
AddHandler pictureBox1.Paint, AddressOf Me.pictureBox1_Paint
' Add the PictureBox control to the Form.
Me.Controls.Add(pictureBox1)
End Sub 'Form1_Load
Private Sub pictureBox1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs)
' Create a local version of the graphics object for the PictureBox.
Dim g As Graphics = e.Graphics
' Draw a string on the PictureBox.
g.DrawString("This is a diagonal line drawn on the control", _
New Font("Arial", 10), Brushes.Red, New PointF(30.0F, 30.0F))
' Draw a line in the PictureBox.
g.DrawLine(System.Drawing.Pens.Red, pictureBox1.Left, _
pictureBox1.Top, pictureBox1.Right, pictureBox1.Bottom)
End Sub 'pictureBox1_Paint
// This example creates a PictureBox control on the form and draws to it.
// This example assumes that the Form_Load event handler method is
// connected to the Load event of the form.
private PictureBox pictureBox1 = new PictureBox();
private void Form1_Load(object sender, System.EventArgs e)
{
// Dock the PictureBox to the form and set its background to white.
pictureBox1.Dock = DockStyle.Fill;
pictureBox1.BackColor = Color.White;
// Connect the Paint event of the PictureBox to the event handler method.
pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(this.pictureBox1_Paint);
// Add the PictureBox control to the Form.
this.Controls.Add(pictureBox1);
}
private void pictureBox1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
// Create a local version of the graphics object for the PictureBox.
Graphics g = e.Graphics;
// Draw a string on the PictureBox.
g.DrawString("This is a diagonal line drawn on the control",
new Font("Arial",10), System.Drawing.Brushes.Blue, new Point(30,30));
// Draw a line in the PictureBox.
g.DrawLine(System.Drawing.Pens.Red, pictureBox1.Left, pictureBox1.Top,
pictureBox1.Right, pictureBox1.Bottom);
}
// This example creates a PictureBox control on the form and draws to it.
// This example assumes that the Form_Load event handler method is
// connected to the Load event of the form.
private:
PictureBox^ pictureBox1;
void Form1_Load( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
pictureBox1 = gcnew PictureBox;
// Dock the PictureBox to the form and set its background to white.
pictureBox1->Dock = DockStyle::Fill;
pictureBox1->BackColor = Color::White;
// Connect the Paint event of the PictureBox to the event handler method.
pictureBox1->Paint += gcnew System::Windows::Forms::PaintEventHandler( this, &Form1::pictureBox1_Paint );
// Add the PictureBox control to the Form.
this->Controls->Add( pictureBox1 );
}
void pictureBox1_Paint( Object^ /*sender*/, System::Windows::Forms::PaintEventArgs^ e )
{
// Create a local version of the graphics object for the PictureBox.
Graphics^ g = e->Graphics;
// Draw a string on the PictureBox.
g->DrawString( "This is a diagonal line drawn on the control",
gcnew System::Drawing::Font( "Arial",10 ), System::Drawing::Brushes::Blue, Point(30,30) );
// Draw a line in the PictureBox.
g->DrawLine( System::Drawing::Pens::Red, pictureBox1->Left, pictureBox1->Top,
pictureBox1->Right, pictureBox1->Bottom );
}
// This example creates a PictureBox control on the form and draws to it.
// This example assumes that the Form_Load event handler method is
// connected to the Load event of the form.
private PictureBox pictureBox1 = new PictureBox();
private void Form1_Load(Object sender, System.EventArgs e)
{
// Dock the PictureBox to the form and set its background to white.
pictureBox1.set_Dock(DockStyle.Fill);
pictureBox1.set_BackColor(Color.get_White());
// Connect the Paint event of the PictureBox to the event handler
// method.
pictureBox1.add_Paint(new System.Windows.Forms.PaintEventHandler(this.
pictureBox1_Paint));
// Add the PictureBox control to the Form.
this.get_Controls().Add(pictureBox1);
} //Form1_Load
private void pictureBox1_Paint(Object sender,
System.Windows.Forms.PaintEventArgs e)
{
// Create a local version of the graphics object for the PictureBox.
Graphics g = e.get_Graphics();
// Draw a string on the PictureBox.
g.DrawString("This is a diagonal line drawn on the control",
new Font("Arial", 10), System.Drawing.Brushes.get_Blue(),
(PointF)new PointF(30, 30));
// Draw a line in the PictureBox.
g.DrawLine(System.Drawing.Pens.get_Red(), pictureBox1.get_Left(),
pictureBox1.get_Top(), pictureBox1.get_Right(),
pictureBox1.get_Bottom());
} //pictureBox1_Paint
平台
Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。
版本信息
.NET Framework
受以下版本支持：2.0、1.1、1.0
.NET Compact Framework
受以下版本支持：2.0、1.0
请参见
参考
System.Windows.Forms 命名空间
OnPaint
Control.Paint 事件
PaintEventArgs 类