copy + paste into/ within a rich textbox?

Question

5.00/5 (2 votes)

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i use:

Clipboard.SetText(telep.Text);

to copy, and:

telep.Text = Clipboard.GetText();

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

Posted 18-Feb-11 10:02am

vlad781

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Comments

Orcun Iyigun 18-Feb-11 16:12pm

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

Sergey Alexandrovich Kryukov 18-Feb-11 16:34pm

Thank you, I credited this suggestion in my answer, but as "pretty bad" (big performance problem), a better way exists.
--SA

Orcun Iyigun 18-Feb-11 16:56pm

One of the reason I replied as a comment instead of an answer because I was unsure and yeah yours seem more efficient.

Sergey Alexandrovich Kryukov 18-Feb-11 17:20pm

Yes, you're absolutely wise, unlike Vraith84 who essentially repeated the same (see).
Thanks again.
Respect,
--SA

2 solutions

Solution 2

Source:
textBox1

Destination:
richTextBox1

SQL

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);
}

Posted 18-Feb-11 10:35am

Vraith84

Updated 18-Feb-11 10:39am

v2

Comments

Sergey Alexandrovich Kryukov 18-Feb-11 17:19pm

Not quite relevant, and not acceptable by the same reasons. This is exactly equivalent to what ocr_ocr_ocr suggested, but he knew it was not good enough to post is as an answer. Also, you repeat already mentined method.
Sorry,
--SA

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-02-18T10:17:00

There are no explicit inserts or appends for this Control.

This will insert your clipboard text at cursor or replace current selection:

C#

telep.SelectedText = Clipboard.GetText();

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:

C#

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

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

C#

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

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