Asp:DropDownList submits page on selection enter?

On your dropdown list make sure the attribute "AutoPostBack" is not set to "true.

On your dropdown list make sure the attribute "AutoPostBack" is not set to "true" EDIT: Saw your comment. I am not great with ASP. Net Update panels as I usually handle the ajax stuff with jquery but I believe you will have to either put your ddlCountries dropdown list in it's own update panel or move it to the states update panel and set ChildrenAsTriggers attribute to true on that update panel.

But I need it enabled, because there is another dropdown for related data. For example Countries > States. DdlStates is populated with related items when ddlCountries is changed.

– Hasan Gürsoy Nov 24 '10 at 20:59 See update. Some filler text. – Aliester Nov 24 '10 at 22:47 Not working.

Best solution so far is to remove panel and default buton – Hasan Gürsoy Nov 26 '10 at 10:13.

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