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Thread: Populating dropdown list from database (need help with sql - where to put it)

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  1. #1
    Join Date
    Jan 2005

    Unhappy Populating dropdown list from database (need help with sql - where to put it)

    I have a dropdown list which is populated from the database. The second should then be populated with items from the database according to what was selected in the first. How do I say to only display the items if they have the category selected in the first box???

    PS I am only using one table.

    Thanks loads

  2. #2
    Join Date
    Jan 2005


    Problem solved, I've noticed that loasds of people have the same problem so here is the code for the SelectedIndexChanged event:

    Private Sub DropDownList1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged

    Dim myconnection As SqlConnection

    Dim mydata As SqlDataAdapter

    Dim mydata7 As SqlDataAdapter

    Dim ds7 As DataSet

    myconnection = New SqlConnection("workstation id=****;packet size=4096;integrated security=SSPI;data source=""****\*" & _
    "CGA"";persist security info=False;initial catalog=table")

    mydata7 = New SqlDataAdapter("Select * from table ", myconnection)

    ds7 = New DataSet

    mydata7.Fill(ds7, "table")

    Dim dav1 As New DataView(ds7.Tables("table"))

    Dim strFilter As String

    strFilter = "Category='" & DropDownList1.SelectedValue & "'".ToString

    dav1.RowFilter = strFilter

    DropDownList3.DataSource = dav1
    DropDownList3.DataTextField = ds7.Tables(0).Columns("Question").ColumnName.ToString()

    DropDownList3.DataValueField = ds7.Tables(0).Columns("Question").ColumnName.ToString()


    End Sub

    Hope this helps anyone in the same situation!

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