Do not recognize an expression in code

.NET
1

Hi,

I am testing the code on page 553 of book “Build your own website in asp.net 4 using C# and vb”. I could not understand the following expression,

if (sortExpression == gridSortExpression)

Where “gridSortExpression” is defined?

I am using visual studio express 2012 and not able to execute the code on page 553 and 554. I will appreciate immediate help.

2

On page 553 (maybe 554), there is the following:

Private Property gridSortExpression() As String
  Get
    If (ViewState("GridSortExpression") Is Nothing) Then
      ViewState("GridSortExpression") = "DepartmentID"
    End If
    Return ViewState("GridSortExpression")
  End Get
  Set(ByVal value As String)
    ViewState("GridSortExpression") = value
  End Set
End Property

[highlight=C#]private string gridSortExpression
{
get
{
if (ViewState[“GridSortExpression”] == null)
{
ViewState[“GridSortExpression”] = “DepartmentID”;
}
return (string) ViewState[“GridSortExpression”];
}
set
{
ViewState[“GridSortExpression”] = value;
}
}

3
4

If you ever want to find a variable and you are using visual studio, you can usually right click on it and choose “go to declaration” to figure out where it is declared.

5

That only helps if you have declared it :slight_smile: In his case, he hadn’t done that yet, as he missed that part of the code :smiley: