PaintEventArgs(Graphics, Rectangle) 建構函式

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

使用指定的圖形及裁剪 (Clipping) 方框來初始化 PaintEventArgs 類別的新執行個體。

C#

public PaintEventArgs (System.Drawing.Graphics graphics, System.Drawing.Rectangle clipRect);

參數

graphics

Graphics

用來繪製項目的 Graphics。

clipRect

Rectangle

Rectangle，表示要進行繪製的矩形。

範例

下列程式碼範例會在控制項上 PictureBox 繪製線條和文字。

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

Graphics在處置 時 PaintEventArgs ，會處置 參數所 graphics 識別的 。

適用於

另請參閱

• Rectangle
• Graphics