How to use ZedGraph in a button click

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VB

ASP.NET

Hi Friends,

I am doing a project in asp.net, and I want to show a graph using ZedGraph dll. Now I show the graph in my project corresponding to the data
but now I faced a problem that is that graph is always visible when that page is loaded.

And I want that graph shows only a button click event..

Friends plz help me to show this graph when I clicked a button.

Now am using This Code:

Private Sub OnRenderGraph1(ByVal zgw As ZedGraphWeb, ByVal g As System.Drawing.Graphics, _
    ByVal masterPane As ZedGraph.MasterPane) Handles ZedGraphWeb1.RenderGraph

    'Dim myPane As GraphPane = zgc.GraphPane
    Dim myPane As GraphPane = masterPane(0)
    Dim num As Integer
    Dim Xcount As Integer

    ' Set the titles and axis labels
    myPane.Title.Text = "LBS Financials – All Practices - April 2011 - November 2010"
    myPane.XAxis.Title.Text = "Month/Year"
    myPane.YAxis.Title.Text = "Values In ($)"

    Xcount = gvFinancialSummaryReport.Rows.Count - 1

    Dim y1(Xcount), y2(Xcount), Y3(Xcount), Y4(Xcount), y5(Xcount), y6(Xcount), _
    y7(Xcount), y8(Xcount) As Double
    Dim Xlabels(Xcount) As String

    For num = 0 To Xcount
        Xlabels(num) = gvFinancialSummaryReport.Rows(num).Cells(0).Text

        y1(num) = gvFinancialSummaryReport.Rows(num).Cells(1).Text
        y2(num) = gvFinancialSummaryReport.Rows(num).Cells(2).Text
        Y3(num) = gvFinancialSummaryReport.Rows(num).Cells(3).Text
        Y4(num) = gvFinancialSummaryReport.Rows(num).Cells(4).Text
        y5(num) = gvFinancialSummaryReport.Rows(num).Cells(5).Text
        y6(num) = gvFinancialSummaryReport.Rows(num).Cells(6).Text
        y7(num) = gvFinancialSummaryReport.Rows(num).Cells(7).Text

        If gvFinancialSummaryReport.Rows(num).Cells(8).Text = "" Then
            y8(num) = 0
        Else
            y8(num) = gvFinancialSummaryReport.Rows(num).Cells(8).Text
        End If
    Next
    ' Generate a red bar with "Charges" in the legend

    Dim myBar As BarItem = myPane.AddBar("Charges", Nothing, y1, Color.Red)
    myBar.Bar.Fill = New Fill(Color.Red, Color.White, Color.Red)


    ' Generate a blue bar with "Insurance Payments" in the legend
    myBar = myPane.AddBar("Insurance Payments", Nothing, y2, Color.Blue)
    myBar.Bar.Fill = New Fill(Color.Blue, Color.White, Color.Blue)

    ' Generate a green bar with "Patient Payments" in the legend
    myBar = myPane.AddBar("Patient Payments", Nothing, Y3, Color.Green)
    myBar.Bar.Fill = New Fill(Color.Green, Color.White, Color.Green)

    ' Generate a DarkTurquoise bar with "Total Collections" in the legend
    myBar = myPane.AddBar("Total Collections", Nothing, Y4, Color.DarkTurquoise)
    myBar.Bar.Fill = New Fill(Color.DarkTurquoise, Color.White, Color.DarkTurquoise)

    ' Generate a Black bar with "Insurance Adjustments / Write-offs" in the legend
    myBar = myPane.AddBar("Insurance Adjustments / Write-offs", Nothing, y5, Color.Black)
    myBar.Bar.Fill = New Fill(Color.Black, Color.White, Color.Black)

    ' Generate a DarkSalmon bar with "Receipt Adjustments" in the legend
    myBar = myPane.AddBar("Receipt Adjustments", Nothing, y6, Color.DarkSalmon)
    myBar.Bar.Fill = New Fill(Color.DarkSalmon, Color.White, Color.DarkSalmon)

    ' Generate a DarkMagenta bar with "Insurance AR" in the legend
    myBar = myPane.AddBar("Insurance AR", Nothing, y7, Color.DarkMagenta)
    myBar.Bar.Fill = New Fill(Color.DarkMagenta, Color.White, Color.DarkMagenta)

    ' Generate a DarkKhaki bar with "Insurance A/R Days" in the legend
    myBar = myPane.AddBar("Insurance A/R Days", Nothing, y8, Color.DarkKhaki)
    myBar.Bar.Fill = New Fill(Color.DarkKhaki, Color.White, Color.DarkKhaki)


    ' Draw the X tics between the labels instead of at the labels
    myPane.XAxis.MajorTic.IsBetweenLabels = True

    ' Set the XAxis labels
    myPane.XAxis.Scale.TextLabels = Xlabels
    ' Set the XAxis to Text type
    myPane.XAxis.Type = AxisType.Text

    ' Fill the axis area with a gradient
    myPane.Chart.Fill = New Fill(Color.White, _
       Color.FromArgb(255, 255, 166), 90.0F)
    ' Fill the pane area with a solid color
    myPane.Fill = New Fill(Color.FromArgb(250, 250, 255))

    masterPane.AxisChange(g)
    'BarItem.CreateBarLabels(myPane, False, "f0")

    'myPane.YAxis.Scale.Max += myPane.YAxis.Scale.MajorStep
End Sub

Please help me.

Thanks.