Control.Paint 事件

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

來源:

Control.cs

發生於重繪控制項時。

C#

public event System.Windows.Forms.PaintEventHandler? Paint;

事件類型

PaintEventHandler

範例

下列程式碼範例會在 PictureBox 表單上建立 控制項，並使用 Paint 事件來繪製它。

C#

// 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();
// Cache font instead of recreating font objects each time we paint.
private Font fnt = new Font("Arial",10);
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",
        fnt, 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);
}

備註

當重新繪製控制項時，就會 Paint 引發 事件。 它會將 的 PaintEventArgs 實例傳遞至處理事件的方法 () Paint 。

建立新的自訂控制項或具有不同視覺外觀的繼承控制項時，您必須提供程式碼，以覆 OnPaint 寫 方法來轉譯控制項。 如需詳細資訊，請參閱覆寫 OnPaint 方法和自訂控制項繪製和轉譯。

如需處理事件的詳細資訊，請參閱 處理和引發事件。

適用於

另請參閱

• OnPaint(PaintEventArgs)