Adding Event Handler to DropDownList inside GridView - how to?

Question

Hi,

I have DropDownList inside GridView. Now I would like to add event handler for dropdownlist which would react on SelectedIndexChanged. I'm nesting DropDownList inside GridView by using RowDataBound event for GridView. (http://www.highoncoding.com/Articles/169_DropDownList_Inside_GridView__Method_1_.aspx) Can anybody help me, and tell me how to add event handling for dropdownlist, please?

Answer 1

In your GridView1_RowDataBound method, add the handler when you create the drop down by calling ddl.SelectedIndexChanged += new EventHandler(ddl_SelectedIndexChanged);

Then, declare the void ddl_SelectedIndexChanged(object sender, EventArgs e) method to handle your logic. The sender argument will be a reference to the drop down's that was selected.

Answer 2

Add the onRowCommand event on the grid view, add a command name to the dropdown list, set its autoPostback property to true and in the onRowCommand event check the e.CommandName (in case you have other events the grid view is throwing like paging).

Answer 3

ok , the issue I've had is solved. To handle SelectedIndexChanged for DropDownList nested inside GridView you have to just set AutoPostback property to true and point SelectedIndexChange event to some procedure.

The cause of issue I had was that I didn't check in Page_Load function (during binding data to GridView) following rule: "If Not Page.IsPostBack Then" . And that's all. So don't forget to do it please! :)