Repeater + Extended control not working

Alright this is in my aspx file in the ItemTemplate section of the repeater

<td><cwc:DataDropDownList runat="server" DataSourceID="rolesDataSource" SelectedValue=<%# Eval("Role") %>
DataTextField="Description" DataValueField="id" AutoPostBack=true OnSelectedIndexChanged=dropDownList_SelectedIndexChanged
ExtraData=<%# Eval("FirstName") %> >
</cwc:DataDropDownList></td>

And this is what the code for the DataDropDownList looks like:

namespace CustomWebControls
{
[ToolboxData("<{0}:DataDropDownList runat=server></{0}:DataDropDownList>")]
public class DataDropDownList : System.Web.UI.WebControls.DropDownList
{
string extraData;

[BindableAttribute(true, BindingDirection.TwoWay)]
public virtual string ExtraData
{
get
{
return extraData;
}
set
{
extraData = value;
}
}
}
}

If I set the ExtraData to be something like "wtf" in the aspx then in the drop down's postback it shows up fine. If I leave it at the <%# Eval("FirstName") %> the value ends up being null. And I eval that same item elsewhere and it works fine, so I know it's not a spelling mistake.

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Repeater + Extended control not working

IraW
Alright, Well I managed to figure out my problem, for all those unaware. You need to store the property value in the viewstate instead of as a member value.

so the property code now looks like this:

public virtual string ExtraData
{
get { return ViewState["ExtraData"]; }
set { ViewState["ExtraData"] = value; }
}
Joao Talles
I added some debug stuff, the Eval is getting called correctly the first time around, just not on the postback after I select a new drop down list item.
cis_student
Ok, I just looked up what control state is... It looks interesting however what do you gain by using it
JamesCandy
Good to see that you corrected by yourself using view state. Try the same thing with the control state.

Regards,
Jimmy
erickson777

Anything you store in the control state remains there until it is explicitly removed. A web page developer can disable view state for the page however control state cannot be disabled.

Regards,
Jimmy
Repeater + Extended control not working

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