How to use databind records in inline if statements - asp.net

Question

here is my problem:
I've got a repeater on my asp.net (VB):
<asp:Repeater ID="Repeater1" runat="server">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("Question_Number") %>' />
<%#Eval("Question_Desc")%>
Now what I want to do is, check a value that I haven't used called "Question_Type" which could be = 1, 2 or 3 depending if it is multiple choice, short answer, etc.
I have tried this:
<%
if Eval("Question_type") = 1 then
Response.Write(" <asp:RadioButton runat=""server"">test1</asp:RadioButton>")
Response.Write(" <asp:RadioButton runat=""server"">test2</asp:RadioButton>")
Response.Write(" <asp:RadioButton runat=""server"">test3</asp:RadioButton>")
end if
%>
and I get this error:
Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.
HOW can I use this value in a if statement???

Answer 1

You are going to need to handle the ItemDataBound event and manually handle the values there.
Here is how I might approach the problem given this repeater:
<asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="HandleQuestionType">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("Question_Number") %>' />
<%#Eval("Question_Desc")%>
<asp:PlaceHolder ID="phQuestions" runat="server" />
</ItemTemplate>
</asp:Repeater>
Here is my event handler for getting the possible answers to a radio button list:
protected void HandleQuestionType(object sender, RepeaterItemEventArgs e)
{
// Execute the following logic for Items and Alternating Items.
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
var question = e.Item.DataItem as Question;
var placeHolder = e.Item.FindControl("phQuestions") as PlaceHolder;
if(question != null && placeHolder != null)
{
if(question.Question_Type == QuestionTypeEnum.MultipleChoice)
{
var radioList = new RadioButtonList
{
DataTextField = "Answer",
DataValueField = "ID",
DataSource = GetPossibleAnswers()
};
radioList.DataBind();
placeHolder.Controls.Add(radioList);
}
}
}
}