<script runat="server"> // Demonstrates how to use the reloaded data during the post back request. void Page_Load(Object sender,EventArgs e) { if(Page.IsPostBack==false) { UserID.Text = Guid.NewGuid().ToString(); CreateChart(); } else { //use the old image System.Web.UI.WebControls.Image chartImage = new System.Web.UI.WebControls.Image(); chartImage.ID = "PostBackChart"; string basePath = Request.Path; basePath = basePath.Substring(0,basePath.LastIndexOf("/")); chartImage.ImageUrl = basePath + "/temp/chart" + UserID.Text + ".png"; chartHolder.Controls.Add(chartImage); }
} SeriesCollection getRandomData() { SeriesCollection SC = new SeriesCollection(); Random myR = new Random(); for(int a = 1; a < 5; a++) { Series s = new Series(); s.Name = "Series " + a; for(int b = 1; b < 5; b++) { Element e = new Element(); e.Name = "Element " + b; e.YValue = 25 + myR.Next(50); s.Elements.Add(e); } SC.Add(s); }
<script runat="server"> ' Demonstrates how to use the reloaded data during the post back request. Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) If Page.IsPostBack=False Then UserID.Text = Guid.NewGuid().ToString() CreateChart() Else 'use the old image Dim chartImage As System.Web.UI.WebControls.Image = New System.Web.UI.WebControls.Image() chartImage.ID = "PostBackChart" Dim basePath As String = Request.Path basePath = basePath.Substring(0,basePath.LastIndexOf("/")) chartImage.ImageUrl = basePath & "/temp/chart" & UserID.Text & ".png" chartHolder.Controls.Add(chartImage) End If
End Sub Function getRandomData() As SeriesCollection Dim SC As SeriesCollection = New SeriesCollection() Dim myR As Random = New Random() For a As Integer = 1 To 4 Dim s As Series = New Series() s.Name = "Series " & a For b As Integer = 1 To 4 Dim e As Element = New Element() e.Name = "Element " & b e.YValue = 25 + myR.Next(50) s.Elements.Add(e) Next b SC.Add(s) Next a
Return SC End Function Sub CreateChart() Dim myChart As dotnetCHARTING.Chart = New dotnetCHARTING.Chart() myChart.Size="600x350" myChart.TempDirectory = "temp" myChart.FileName="chart" & UserID.Text myChart.DisableBrowserCache=False
' Set the title. 'myChart.Title = "My Chart";
' Set the x axis label myChart.ChartArea.XAxis.Label.Text = "X Axis Label"
' Set the y axis label myChart.ChartArea.YAxis.Label.Text = "Y Axis Label"
' Set the bar shading effect myChart.ShadingEffect = True
' Add the random data. myChart.SeriesCollection.Add(getRandomData())
Previous