Web Forms :: Put String To Label From ListBox When Changing Index In ListBox4

May 2, 2010

I have some problem to understand how this example works with the updatepanel. I have put a ListBox4 and a label inside an updatepanel and put the property for the ListBox to AutoPostBack = true; So what I now am trying to do is when I click on the four items in the ListBox, I want the label to update the new String that is clicked in the ListBox. However what first happens when I click the 2:nd item is that I get the error:

Index was out of range. Must be non-negative and less than the size of the collection. I wonder what the correct way is to do this. I am not sure to know what is right here ? I think many example I do will be solved if I learn this one.

[Code]....

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My question is probably a simple one to people used to ASP.NET, So here it is:

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[code]....

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[code]....

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Oct 25, 2010

As you can see in the picture below i've got a Page control with inital letters which cotains a listbox showing different wood articles. When i click on a Tab, the selected tab page get's a new Listbox control with the wood articels starting with the selected initial letter.

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[Code]....

[Code]....

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[Code]....

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[Code]....

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[Code]....

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[Code]....

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[code]...

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================================================================
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[Code] ....

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[Code]....

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