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Updating a list box

P: 53
Hello All,

I am trying to udapte a listbox as suggested like this,but it gives me error.Please help...

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  1.         private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
  2.         {
  4.             int index = listBox1.SelectedIndex;
  5.             Console.WriteLine("Index is {0}",index );
  6.             listBox1.Items[index] = textBox1.Text; 
  7.         }
No matter which item I select in the Listbox,the index ( listBox1.Items[index]) always it takes as -1. Error:::InvalidArgument = Value of '-1' is not a valid index.

but when I print the index value using Console.writeLine it prints the correct slected index. I am not able to figure out the reason.

Thank you all
Feb 10 '09 #1
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1 Reply

P: 12
use if(index>=0) and put your code inside it.
Feb 11 '09 #2

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