Greetings! I have a DropDownList within a FormView which are bound to XmlDataSources: <asp:FormView

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Asked: May 10, 20262026-05-10T22:29:53+00:00 2026-05-10T22:29:53+00:00

Greetings! I have a DropDownList within a FormView which are bound to XmlDataSources: <asp:FormView

0

Greetings!

I have a DropDownList within a FormView which are bound to XmlDataSources:

<asp:FormView ID='MyFormView' runat='server' DataSourceID='MyXmlDataSource'>     <ItemTemplate>         <h1><%# XPath('SomeNode')%></h1>         <asp:Label ID='MyLabel' runat='server' AssociatedControlID='MyDdl' Text='<%# XPath('SomeOtherNode')%>' />         <asp:DropDownList ID='MyDdl'                           runat='server'                           DataSourceID='MyDdlDataSource'                           DataTextField='name'                           DataValueField='value'                           AutoPostBack='true'                           OnSelectedIndexChanged='MyDdl_SelectedIndexChanged'>         </asp:DropDownList>     </ItemTemplate> </asp:FormView> <asp:XmlDataSource ID='MyXmlDataSource' runat='server' XPath='Root/MainSection' /> <asp:XmlDataSource ID='MyDdlDataSource' runat='server' XPath='Root/MainSection/Areas/*' />

In the page’s codebehind, I have the following OnLoad() method as well as the method for when the select index of the dropdownlist changes:

protected override void OnLoad(EventArgs e) {     base.OnLoad(e);      if (!IsPostBack)     {         string xml = GetMyXml(0); // default value         MyXmlDataSource.Data = xml;         MyDdlDataSource.Data = xml;     } }  protected void MyDdl_SelectedIndexChanged(object sender, EventArgs e) {     DropDownList l_MyDdl = FindControl('MyDdl') as DropDownList;     int myVal;     if (l_MyDdl != null)         if (!Int32.TryParse(l_MyDdl.SelectedItem.Value, out myVal))             myVal = 0;     string xml = GetMyXml(myVal);     MyXmlDataSource.Data = xml;     MyDdlDataSource.Data = xml; }

When a different value is selected from the dropdown list and SelectedIndexChanged is invoked, I am unable to get the value of the dropdown list (FindControl always returns null) in order to use it to re-bind the datasources. How can I get this value?