Problem using AppendText with Tab pages

sis · February 16th, 2004, 04:42 AM

Hi
I'm trying to gather text in txtboxes on tabpage1 and show it in txtbox on tabpage2. This is supposed to happen when clicked on a button on the form it self. However when using
txtBox.AppendText(txtbox1.Text);

the program crashes !!
I've already made sure that something is in txtBox on tabpage2 so that is not the problem...
If anyone knows what I'm doing wrong og why and how to make it work :D
I'd be grateful
wh.
sis

KABay · February 16th, 2004, 10:54 AM

You don't say that you have also made sure something is [u]selected</u> in your source textbox. Maybe you are trying to append a null string. Is it?

Code:

// Determine if text is selected in textBox1.
   if(textBox1.SelectionLength == 0)
      // No selection made, return.
      return;

   // Determine if the text being appended to textBox2 exceeds the MaxLength property.
   if((textBox1.SelectedText.Length + textBox2.TextLength) > textBox2.MaxLength)
      MessageBox.Show("The text to paste in is larger than the maximum number of characters allowed");
   else
      // Append the text from textBox1 into textBox2.
      textBox2.AppendText(textBox1.SelectedText);

{http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemwindowsformstextboxbaseclassappendtextt opic.asp}

Show us the code!

melvik · February 16th, 2004, 11:26 AM

u know I have the same problem & I still stuck on

I found out that its reason is that the control in next Tab_Page is unknown, u can see it my tracing. anyway when u visit next Tab-Page & back to previous Tab-Page it solved. I'll be glad if u tell me in any conclusion. Tnx.

Always:),
Hovik Melkomian.

sis · February 16th, 2004, 05:59 PM

Thank you but, :D
I don't think that is the problem as it works just fine if its all on the same tabPage. And I've tried checking if it selected and if it is too long...

My guess is that is has something to do woth using the tab control
sis