drop downlist selected value

ddlType.DataSource = ObjComplaintReportFormBLL.ComplaintType();
      ddlType.DataTextField = "ComplaintType_Name";
      ddlType.DataValueField = "complainttype_id";
      ddlType.DataBind();
     ddlType.Items.Insert(0, "All");

ObjComplaintReportFormBLL.ComplaintType() returns the Co开发者_如何学PythonmplaintType_Name, complainttype_id

All is the default value for the drop down list Now how should I set the value of this list item "All" to 0(int) I could do ddlType.Items[0].value = "0". But this is a string

Thanks Sun

Replace

ddlType.Items.Insert(0, "All");

with

ddlType.Items.Add(new ListItem(0,"All"));

By using Insert, you're putting the text "All" as the first option in the dropdown with a value of "" (empty string). To get "0" to be your value for your "All" item, provide a ListItem:

ddlType.Items.Add(new ListItem("0", "All"));

or, perhaps closer to what you want to do, this will insert your "All" item at the start of the list:

ddlType.Items.Insert(0, new ListItem("0", "All"));

then:

ddlType.SelectedValue = "0";

You can pass the listItem object to the ddlType.Items.Insert method instead of passing a string value e.g.

ListItem liItem = new ListItem("All","0");
ddlType.Items.Insert(0,liItem);