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Datagrid view control producing duplicate data results when data is cached

Posted By:      Posted Date: October 10, 2010    Points: 0   Category :ASP.Net

I have a datagridview control that I'm using to display cache data to the end used on a web form. The issue that I'm having is that every time I re-run the application, and the cache data is re-generated... it loads duplicate data that's being displayed to the end user. I can't seem to figure out how to keep this from happening.

What I would like to have happen is that only unique data rows be returned and cached for the end user. Unless there are new data rows on the database that needs to be included in the cache data results...the previous data results should not be duplicated. I've tried to change a few properties on the datagridview control, but nothing seem to keep this from happening. I have included a copy of my code below. Any help would be greatly appreciated.


' Code that is used to cache data that's returned from database

Protected Sub PopulateNewhardwareSetInfo()

   Dim conn As SqlConnection = New SqlConnection(m_connectionString)

   Dim cmd As SqlCommand = New SqlCommand("Select * from HardwareSet", conn)  

   Dim sqlDA As SqlDataAdapter = New SqlDataAdapter(cmd)      

   sqlDA.FillSchema(m_ItrackerData, SchemaType.Source, "HardwareSet")

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