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Hi All,

I have a Combobox in my Application.The Data is populating into the combo box from database.In the Stored Proc i have given "All" Explicetely.Now i have another combo box in other page in which only data fetching from the database should be populated not "All".So what i did is explecetely removed All by


but its throwing an error like "Operation not supported on read-only collection"
can anyone help on this please..

Posted 17-Aug-11 2:12am
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Solution 2

I assume you've set the ComboBox's ItemsSource.
When you've set the ItemsSource you cannot modify the Items collection, you'll have to modify the collection your ItemsSource is set to.

Also the other way around if you've added any items to the Items collection then you cannot set the ItemsSource.
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Solution 1

Try removing "All" from the dataset BEFORE binding it to the combobox.

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