Cascading DropDownList in a DetailsView - asp.net

Question

I have two dropdown within a DetailsView and I want to work in cascade, the idea is that an area contains various issues and these issues depend on the selected area, but I get the following error:
Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.
in the next line:
<asp:DropDownList ID="ddlIssue" runat="server"
DataTextField="NameIssue" DataValueField="IdIssue"
The complete code is:
<asp:TemplateField HeaderText="Area" SortExpression="IdArea">
<EditItemTemplate>
<asp:DropDownList ID="ddlArea" runat="server"
DataSourceID="SqlDataSource145711" DataTextField="NameArea"
DataValueField="IdArea" AutoPostBack="true"
AppendDataBoundItems="true" SelectedValue='<%# Bind("IdArea") %>'>
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource145711" runat="server"
ConnectionString="<%$ ConnectionStrings:BaseDatosCJConnectionString %>"
SelectCommand="SELECT IdArea, NameArea FROM AREA">
</asp:SqlDataSource>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label5" runat="server"
Text='<%# Bind("IdArea") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Issue">
<EditItemTemplate>
**<asp:DropDownList ID="ddlIssue" runat="server"
DataTextField="NameIssue" DataValueField="IdIssue"**
DataSourceID="SqlDataSource22" SelectedValue='<%# Bind("IdIssue") %>'
</asp:DropDownList>
<asp:SqlDataSource runat="server"
ID="sqlDataSource22"
ConnectionString="<%$ ConnectionStrings:BaseDatosCJConnectionString %>"
SelectCommand="SELECT IdIssue, NameAIssue, IdArea FROM ISSUE"
FilterExpression="IdArea = '{0}'">
<FilterParameters>
<asp:ControlParameter Name="Param" ControlID="ddlArea"
PropertyName="SelectedValue" />
</FilterParameters>
</asp:SqlDataSource>
</EditItemTemplate>
</asp:TemplateField>
Can you help with the solution to this error?
I have to do something from the code?
blessings

Answer 1

Don't you want the problematic area to look like this:
<asp:DropDownList ID="ddlIssue" runat="server"
DataTextField="NameIssue" DataValueField="IdIssue"
DataSourceID="SqlDataSource22" SelectedValue='<%# Bind("IdIssue") %'>
Note that apostrophe ' goes before the closing paren.