How to Check for null value in asp.net source?

Question

I want to check if Date is null then display a string . if not null display date.

  <asp:Label ID="Label9" runat="server" Text='<%# Convert.ToDateTime(Eval("Issue_Date")).ToShortDateString() %>' />

sjkm · Accepted Answer · 2014-01-28 10:34:34Z

2

You could also solve it like this:

<asp:Label ID="Label9" runat="server" 
           Text='<%# (!String.IsNullOrEmpty(Eval("Issue_Date")) ? 
                 Convert.ToDateTime(Eval("Issue_Date")).ToShortDateString() :
                 "yourStringIfNull") %>' />

answered Jan 28, 2014 at 10:34

sjkm

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Marian Ban · Accepted Answer · 2014-01-28 10:34:32Z

2

Create a method in the code-behind:

public string DisplayDateTime(object value)
{
  if (value== null)
  {
     return "Date is null";
  }

  return Convert.ToDateTime(value).ToShortDateString();
}

then call DisplayDateTime from a page:

<asp:Label Text='<%# DisplayDateTime(Eval("Issue_Date")) %>' runat="server"></asp:Label>

answered Jan 28, 2014 at 10:34

Marian Ban

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