Graph Export To HTML

I have created a report with subreport.My subreport contains a graph/chart control which retrieves data from the database.My problem now,is when i deploy my report in HTML,the graph wont show.But it works perfectly in PDF and Excel..I am currentlt using now the getimage.aspx codes.I am confused now,what fornat will be used in the code(getimage.aspx.cs)Would i be evaluating the subreport??use HMTL as format??or PNG as fornat(because as i have read,PNG will be the format of the chart)??

This is my current code :



{

/// <summary>

/// Summary description for getimage.

/// </summary>

public partial class getimage : System.Web.UI.Page

{

protected void Page_Load(object sender, System.EventArgs e)

{

try

{

string reportPath = Server.UrlDecode(Request.Params["report"].ToString());

string streamID = Request.Params["streamid"].ToString();

string format = "HTML4.0";

ReportingService2005 rs = new ReportingService2005();

rs = (ReportingService2005)Session["rs"];

string mimeTypeImage = "";

string encodingImage = "";

byte[] image;

ReportExecutionService rptExec = new ReportExecutionService();

string deviceInfo;

string streamRoot;

streamRoot = "getimage.aspx?report=" + reportPath + "&amp;streamid=" + streamID;

string extension = "";

Virtx.VF_ReportExecution.Warning[] warning = null;

string[] streamIDS = null;

switch (format)

{

case "HTML4.0":

case "HTML3.2":

{

deviceInfo = "<DeviceInfo>";

deviceInfo += "<StreamRoot>" + streamRoot + "</StreamRoot>";

deviceInfo += "<Toolbar>False</Toolbar>";

deviceInfo += "<Parameters>False</Parameters>";

deviceInfo += "<HTMLFragment>False</HTMLFragment>";

deviceInfo += "<StyleStream>False</StyleStream>";

deviceInfo += "<Section>0</Section>";

deviceInfo += "<Zoom></Zoom>";

deviceInfo += "</DeviceInfo>";

}

break;

default:

deviceInfo = "<DeviceInfo></DeviceInfo>";

break;

}

image = rptExec.Render("IMAGE", deviceInfo, out extension, out mimeTypeImage, out encodingImage, out warning, out streamIDS);

//image = rptExec.RenderStream(format, streamID, deviceInfo, out encodingImage, out mimeTypeImage);

Response.Clear();

Response.ContentType = mimeTypeImage;

Response.AppendHeader("content-length", image.Length.ToString());

Response.BinaryWrite(image);

Response.Flush();

Response.Close();

}

catch (System.Threading.ThreadAbortException) { }

catch (Exception ex)

{

Trace.Write(ex.Message);

Virtx.Tracer.WriteTrace(1, "Exception caught while performing getimage(): " + ex.Message);

}

}

#region Web Form Designer generated code

override protected void OnInit(EventArgs e)

{

//

// CODEGEN: This call is required by the ASP.NET Web Form Designer.

//

InitializeComponent();

base.OnInit(e);

}

/// <summary>

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

/// </summary>

private void InitializeComponent()

{

}

#endregion

}

}