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ASP.Net DropDownList SelectedIndex Not Changing (SelectedIndex Is Always 0)


ASP.Net DropDownList SelectedIndex Is Not Changing

> In some situation, the dropdownlist selected Item or Index will be always the first Item.
> We can get this Issue when we bind the dropdownlist after the button click postback.
> This is because, On Asp.Net Life Cycle, the Postback Event comes after the PageLoad Event.
> And In each Page Load, the Dropdownlist will get refreshed.
> Hence after Page Load, on Postback Event, the Selected Item will be the first one.

How To Resolve This Issue..?

> In order to resolve this Issue, we have prevent loading the dropdownlist on postback.
> We have to use IsPostback property in Asp.Net for this purpose as shown below.

If(! IsPostBack)
{
     Bind your dropdownlist here.
}


> By this way we can resolve this issue.

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