Question

the following code in the master.cs file

    public bool MenuIssuesManagementVisible   //defining the set false visibility property
    {
        get { return lnkIssuesManagement.Visible; }
        set { lnkIssuesManagement.Visible = value; }
    }

    public bool MenuTimeFilterVisible
    {
        get { return lnkTimeFilter.Visible; }
        set { lnkTimeFilter.Visible = value; }
    }

is setting a property which i use in a web content form in the following way–>

((Default)this.Master).MenuIssuesManagementVisible = false;
        ((Default)this.Master).MenuTimeFilterVisible = false;

but whenever i run the web content form, i get an error at the line

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Line 27:             set { lnkTimeFilter.Visible = value; }

how do i rectify that?

Answer 1

NullReference is coming from the line shown – there’s only one object reference there – lnkTimeFilter is null. Beyond that it’s hard to say with the information you’ve provided. Perhaps it is not a direct child of the master page? Where is lnkTimeFilter declared?