复制+粘贴到富文本框中/在其中?

问题描述

我使用:

Clipboard.SetText(telep.Text);

复制，然后:

to copy, and:

telep.Text = Clipboard.GetText();

粘贴.但它不会替换当前文本，而是替换了富文本框中的所有内容.
"telep"是富文本框.
感谢

to paste. but instead of adding onto the current context,it replaces everything in the rich textbox.
''telep'' is the rich textbox.
thanks

推荐答案

telep.SelectedText = Clipboard.GetText();

这会追加(贷记给orc_orc_orc)，但是此操作可能非常慢，因为它将把控件的整个文本复制到某些本地内存中，而不是将总和复制回到控件中.所以这种方法很糟糕:

This will do append (credit to orc_orc_orc), but this operation can be very slow, as it will copy whole text of the control to some local memory and than copy a sum back to control. So this method is pretty bad:

telep.Text = telep.Text + Clipboard.GetText();

最后，追加的最终解决方案应将光标操作与SelectedText属性结合起来.

Finally, the ultimate solution for append should combine cursor manipulation with SelectedText property.

string newText = Clipboard.GetText();
telep.SelectionStart = telep.TextLength;
telep.SelectionLength = 0;
telep.SelectedText = newText;

这对于使用属性TextLength而不是Text.Length非常重要，否则将再次变得非常慢.

这是append的最终答案.
您可能还想记住并在添加后恢复先前的选择.使用上面显示的属性SelectionStart和SelectionLength.

—SA

This is very important to use the property TextLength, not Text.Length, otherwise it will again be very slow.

This is a final answer for append.
You may also want to remember and restore previous selection after appending. Use the properties SelectionStart and SelectionLength shown above.

—SA

if (richTextBox1.SelectionLength > 0)
{
    //Replace selected text if there is any
    richTextBox1.Text = richTextBox1.Text.Remove(richTextBox1.SelectionStart, richTextBox1.SelectionLength).Insert(richTextBox1.SelectionStart, textBox1.Text);
} else {
    //simple insert
    richTextBox1.Text = richTextBox1.Text.Insert(richTextBox1.SelectionStart, textBox1.Text);
}

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