Using '<%# Eval("item") %>'; Handling Null Value and showing 0 against

Question

If dataitem is Null I want to show 0

<asp:Label ID="Label18" Text='<%# Eval("item") %>' runat="server"></asp:Label> 

How can I accomplish this?

Answer 1

You can also create a public method on the page then call that from the code-in-front.

e.g. if using C#:

public string ProcessMyDataItem(object myValue) {   if (myValue == null)   {      return "0 value";   }    return myValue.ToString(); } 

Then the label in the code-in-front will be something like:

<asp:Label ID="Label18" Text='<%# ProcessMyDataItem(Eval("item")) %>' runat="server"></asp:Label> 

Sorry, haven't tested this code so can't guarantee I got the syntax of "<%# ProcessMyDataItem(Eval("item")) %>" entirely correct.

Answer 2

I'm using this for string values:

<%#(String.IsNullOrEmpty(Eval("Data").ToString()) ? "0" : Eval("Data"))%> 

You can also use following for nullable values:

<%#(Eval("Data") == null ? "0" : Eval("Data"))%> 

Also if you're using .net 4.5 and above I suggest you use strongly typed data binding:

<asp:Repeater runat="server" DataSourceID="odsUsers" ItemType="Entity.User">     <ItemTemplate>         <%# Item.Title %>     </ItemTemplate> </asp:Repeater>