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c#asp.netdata-binding
Ahmad Z. Tibi
Ahmad Z. Tibi

Reputation: 429

ASP.NET Custom Binding

I am trying to bind Panel.visible to be visible depending on matching database table field and querystring as: 

<asp:Panel ID="Panel2" runat="server" Visible='<%# Eval("Mjr_Id") == Request.QueryString["Mjr_Id"] %>'> ... </asp:Panel>

But it failed, do you have idea about the correct binding format to do this?

Upvotes: 0

Views: 582

Answers (1)

Richard Deeming
Richard Deeming

Reputation: 31198

The Eval function returns an object, whereas the QueryString indexer returns a string. Applying the equality operator to an object and a string will result in a reference comparison, whereas you want a value comparison.

To make the code work, you'll need to convert the object to a string:

Visible='<%# Eval("Mjr_Id", "{0}") == Request.QueryString["Mjr_Id"] %>'

NB: This will perform a case-sensitive ordinal comparison. If that's not what you want, you'll need to use the string.Equals(string, string, StringComparison) method.

Upvotes: 1

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