面板中的C#绘图 [英] C# Drawing in a Panel

问题描述

我想用这种方法绘制面板:

I want to draw in a panel with this method:

protected override void InitOutput(object output)
        {
            if (output is Control)
            {
                Control c = (Control)output;
                g.FillRectangle(hb, 7, 10, 30 - 19, 5);
                ...
            }

我可以输入文字:

protected override void InitOutput(object output)
        {
            if (output is Control)
            {
                Control c = (Control)output;
                lbl.Name = "lbl";
                lbl.Size = new System.Drawing.Size(10, 10);
                lbl.TabIndex = 5;
                lbl.Text = "test";

                panel.Location = new System.Drawing.Point(1, 1);
                panel.Name = "panelSys";
                panel.Size = new System.Drawing.Size(20, 20);
                panel.TabIndex = 5;
                panel.Controls.Add(lbl);
                c.Controls.Add(panelSys);
            }

希望你能帮助我 谢谢

推荐答案

我不确定为什么需要InitOtuput函数，但是如果要从中进行绘制，您可以这样做:

I am not sure why do you need InitOtuput function but if you want to draw from it you could do it like this:

private void InitOutput(object output)
{
    if (output is Control)
    {
        Control c = (Control)output;
        c.Paint += new System.Windows.Forms.PaintEventHandler(c_Paint);
        // Invalidate needed to rise paint event
        c.Invalidate();
    }
}
private void c_Paint(object sender, PaintEventArgs e)
{
    SolidBrush hb =  new SolidBrush(Color.Red);
    e.Graphics.FillRectangle(hb, 7, 10, 30 - 19, 5);
    e.Graphics.DrawString("test", DefaultFont, hb, new PointF(50, 50));
}

此外，您不需要使用标签来绘制文本，您可以使用Graphics.DrawSting来绘制它

Additionaly you don't need to use label to draw text u can draw it using Graphics.DrawSting

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