Web Forms :: Dropdownlist Doesn't Remember The Value After New Selection

Apr 29, 2010

I have already spent two day to solve this on my own but for some reason I can't. Maybe I'm missing the live cicle of the dropdownlist. I hve a three dropdownlist that filter a gridview and the other two dropdownlists One is "Year" the other is "Country" and the other "Species" Each one of them is filter by the other two. So if I filter for one year it will only show me the species and countries that have records on that year. So I have to reload the gridview and all the dropdownlist.

What happend is that since I'm filling again the dropdownlist with less values he can't remember the previous one. I have tried with the events: DataBinding, Load Unload and Init of the dropdown list to force it to remember. The conclusion I have reach is that the databinding and the load have the dropdown list of the previous page. So if I do

String strYears = ddlYears.SelectedValue.ToString();
ddlYears.SelectedIndex = ddlYears.Items.IndexOf(ddlYears.Items.FindByValue(strYears));

And the year was on the index 4 but after changing the country the year is now index 3 he mantains the index 4 showing me another year.............................

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