如何将面板的内容复制到richTextBox？

Question

我有一个面板，应用程序的用户。该面板允许用户以数字方式输入他们的签名。我想从面板中将图形复制到richTextBox的最后。

我对面板当前的代码如下：

public partial class Signature : Form 
{ 
    SolidBrush color; 
    float width; 
    List<List<Point>> _lines; 
    Boolean _mouseDown; 

    public Signature() 
    { 
     InitializeComponent(); 
     _lines = new List<List<Point>>(); 
     color = new SolidBrush(Color.Black); 
     _mouseDown = false; 
    } 

    private void clear_Click(object sender, EventArgs e) 
    { 
     _lines.Clear(); 
     sign.Invalidate(); 
    } 

    private void panel1_MouseDown(object sender, MouseEventArgs e) 
    { 
     _mouseDown = true; 
     _lines.Add(new List<Point>()); 
    } 


    private void panel1_MouseMove(object sender, MouseEventArgs e) 
    { 
     if (_mouseDown) 
     { 
      _lines.Last().Add(e.Location); 
      sign.Invalidate(); 

     } 
    } 

    private void panel1_Paint(object sender, PaintEventArgs e) 
    { 
     foreach (var lineSet in _lines) 
     { 
      if (lineSet.Count > 1) 
      { 
       e.Graphics.DrawLines(new Pen(Color.Black, 4.0F), lineSet.ToArray()); 
      } 
     } 
    } 
    private void panel1_MouseUp(object sender, MouseEventArgs e) 
    { 
     _mouseDown = false; 
    } 

    private void use_Click(object sender, EventArgs e) 
    { 
     MessageBox.Show("Signature successfully imported!", "Success!", MessageBoxButtons.OK, MessageBoxIcon.Exclamation); 
     Basic_Word_Processor.Instance.richTextBoxPrintCtrl1.SelectedText = ""; 
     this.Close(); 
    } 
} 

}

我怎样才能采取从面板绘图，并将其插入到RichTextBox的结束？

Answer 1

您可以先将签名绘制到Bitmap，然后通过Clipboard将该位图复制到RichTextBox。你可以试试这个，但我必须说，这是没有经过测试：

Bitmap bmp = new Bitmap(panel1.Width, panel1.Height); 
Rectangle rect = new Rectangle(0, 0, panel1.Width, panel1.Height); 
panel1.DrawToBitmap(bmp, rect); 
Clipboard.SetImage(bmp); 
richTextBox1.Paste(); 

或者，你可以借鉴Lines到Bitmap