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06.13.2008 at 04:12PM PDT, ID: 23484316
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Convert code to use threading

Asked by clintnash in Microsoft Visual Basic.Net

Tags: VB.NET 2.0

I have a winform app that loads a large quantity of data into a datagrid at start, the apps responsiveness once the data is loaded is good, but after the uses logs in the app looks like it has hung, the login box becomes and empty white square and the main form doesnt load for up to a minute and an half while the dataset that feeds the datagrid is being loaded.  After a little research I think the best method to resolve this is to put the sub that fills the dataset an binds to the datagrid into its own thread (at this point if someone has a better approach please let me know).  With that said, I started trying to find a few examples that explained threading in a way I could implement into my code. What I found were a number of simple examples that left me confused (this makes absolutely no sense to me at all).  

This is roughly the code in my main form.

Private Sub Form1_Load(ByVal sender ....
          Get_Data()
          ... do other stuff
End Sub

Private Sub Get_Data()
      Dim strConn As String = CType(ConfigurationSettings.AppSettings("connectionString"), String)
      Dim ds As DataSet
      Dim distinctds As DataSet

      ds = SqlHelper.ExecuteDataset(strConn, "sp_camps_reg_players", Integer.Parse(lblActiveSeason.Text))

      Dim dt As DataTable
      Dim dt1 As DataTable
      dt = ds.Tables.Item(0)

      'DistinctList is creating by another sub that takes a datatable
      'and returns a dataset that has the duplicates removed from it
      distinctds = DistinctList(dt, "playerid")

      dt1 = distinctds.Tables.Item(0)
      dv = New DataView(dt1)
      DataGrid1.AutoGenerateColumns = False
      DataGrid1.DataSource = dv
      txtfilter.Focus()
End Sub

I am not sure if it matter but the above sub does call another sub (called DistinctList).  Any advice on how to approach this problem will be greatly appreciated.

Thanks,
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[+][-]06.14.2008 at 09:23AM PDT, ID: 21785870

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About this solution

Zone: Microsoft Visual Basic.Net
Tags: VB.NET 2.0
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Solution Provided By: AkisC
Participating Experts: 1
Solution Grade: A
 
 
 
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