RadioButtonList选择在AutoPostBack上无法正常工作

Question

I needed to set the AutoPostBack property to true in order for my SelectedIndexChanged event to fire each time a radio button item was selected. Now for some reason if I click the second item or second to last item on the list, that I item never gets selected. The screens flickers; postback, and either the first or last item on the RadioButtonList is selected instead.

Is there a way to handle/prevent this from occurring?

Answer 1

There could be number of reasons why your code acting strange. You could try following

1) Check if the You might be missing the OnSelectedIndexChanged attribute in the definition of Radiobutton list. Add OnSelectedIndexChanged="EventMethod" to RadioButtonList control definition.

2) EnableViewState may set to false on top of the page! Set it to true Add this line <%@ Page EnableViewState="true" >

If none of above work kindly post Your source code so that missing part could be recognized.

Answer 2

I see where the issue is now. Tricky one to find. It appears that because the first two items on my list have the same exact value, when the postback occurs it uses the selected value to set the item. To remedy the issue, I had to add some variation to the values when adding them to the RadioButtonList's list items, so that they are unique. Issue solved! :) I hope if anyone encountering this issue, this posting helps them out.