ASP.net assign data to a chart

Hi

I use the code below to populate GridView in ASP.net 4 VB.net.
I need to populate a chart with the same data. What code would I use to do this?

Protected Sub Button_View_Results_Click(sender As Object, e As EventArgs) Handles Button_View_Results.Click

        If Me.Label_Reviewer.Text = "" Then
            Me.Label_Please_LogIn.Text = "Please log in first!"
            Exit Sub
        End If
        Me.Label_Please_LogIn.Text = ""

        'If Not IsPostBack Then

        Dim sSQL As String
        sSQL = "SELECT Answers.Survey, Answers.Category, Avg(Answers.Score) * 20 AS [Result Percentage] "
        sSQL = sSQL & "FROM Answers "
        sSQL = sSQL & "GROUP BY Answers.Survey, Answers.Category, Answers.ReviewerID "
        sSQL = sSQL & "HAVING (((Answers.ReviewerID)='" & Me.Label_Reviewer.Text & "'))"
        'sSQL = sSQL & "HAVING (((Answers.ReviewerID)='R'))"

        Dim queryString2 As String = sSQL


        ' Run the query and bind the resulting DataSet
        ' to the GridView control.
        Dim ds2 As DataSet = GetData(queryString2) 'test connection
        If (ds2.Tables.Count > 0) Then

            Me.GridView1.DataSource = ds2
            Me.GridView1.DataBind()

        Else

            'Me.Label_Error1.Text = "Unable to connect to the database. " & Err.Description

        End If
  

        ' End If
    End Sub

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