Team Foundation ASP.NET（如果条件）

Question

I'm working on TFS. My question is how can I use if condition in Default.aspx?

This is my code:

<%#DataBinder.Eval(Container.DataItem, "Fields['Severity'].Value")%>

When I try

<%!String.IsNullOrEmpty(DataBinder.Eval(
    Container.DataItem, "Fields['Severity'].Value").ToString()) ? "a" : "b";%>

it is not working. How can I fix it if

<%#DataBinder.Eval(Container.DataItem, "Fields['Severity'].Value")%>

is empty value will be " ". If workitemtype is Change the request severity will be empty, if workitemtype is Bug - severity can be Medium Critical low.

Answer 1

Your conditional operator is correct, you don't need a terminating semi-colon(;) at the last though. This should work:-

'<%# !String.IsNullOrEmpty(DataBinder.Eval(Container.DataItem,
                 "Fields['Severity'].Value").ToString()) ? "a" : "b" %>'

Update:

Your new exception might be occurringbecause ToString() will throw a null reference exception if the value is null . You can type-cast it to avoid this:-

'<%# String.IsNullOrEmpty((string)DataBinder.Eval(Container.DataItem,
           "Fields['Severity'].Value")) ? String.Empty : 
            DataBinder.Eval(Container.DataItem,"Fields['Severity'].Value").ToString() %>'