Export ChartControl inside GridView to PDF using C# in ASP.Net

Hi theertha,

I have created sample that full-fill your requirement.

HTML

<div>
    <asp:GridView ID="gvChart" runat="server" AutoGenerateColumns="false" OnRowDataBound="OnRowDataBound">
        <Columns>
            <asp:TemplateField HeaderText="Id">
                <ItemTemplate>
                    <asp:Label Text='<%#Eval("Id") %>' runat="server" />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Image">
                <ItemTemplate>
                    <asp:Chart ID="Chart1" runat="server" Height="100px" Width="100px">
                        <Series>
                            <asp:Series Name="Series1">
                            </asp:Series>
                        </Series>
                        <ChartAreas>
                            <asp:ChartArea Name="ChartArea1">
                            </asp:ChartArea>
                        </ChartAreas>
                    </asp:Chart>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Image">
                <ItemTemplate>
                    <asp:Image ID="imgChart" runat="server" />
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>
    <asp:Button ID="btnExportExcel" runat="server" Text="Export to Excel" OnClick="btnExportExcel_Click" />
</div>

Code

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.Add("ID", typeof(int));
        dt.Rows.Add(1);
        gvChart.DataSource = dt;
        gvChart.DataBind();
    }
}

protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        System.Web.UI.WebControls.Image image = e.Row.FindControl("imgChart") as System.Web.UI.WebControls.Image;
        Chart Chart1 = (e.Row.FindControl("Chart1") as Chart);
        //MemoryStream stream = new MemoryStream();
        string[] x = new string[4] { "Mango", "Apple", "Orange", "Banana" };
        int[] y = new int[4] { 200, 112, 55, 96 };
        Chart1.Series[0].Points.DataBindXY(x, y);
        Chart1.Series[0].ChartType = SeriesChartType.Pie;
        Chart1.SaveImage(Server.MapPath("~/Images/ChartRowNo" + (e.Row.RowIndex + 1) + ".jpg"), ChartImageFormat.Png);
        //System.Drawing.Image chartImage = System.Drawing.Image.FromStream(stream);
        //File.WriteAllBytes(Server.MapPath("~/Images/ChartRowNo" + (e.Row.RowIndex + 1) + ".jpg"), imageToByteArray(chartImage));
        image.ImageUrl = GetUrl("~/Images/ChartRowNo" + (e.Row.RowIndex + 1) + ".jpg");
        e.Row.Cells[1].Visible = false;
    }
    if (e.Row.RowType == DataControlRowType.Header)
    {
        e.Row.Cells[1].Visible = false;
    }
}

protected void btnExportExcel_Click(object sender, EventArgs e)
{
    Response.ContentType = "application/pdf";
    Response.AddHeader("content-disposition", "attachment;filename=Panel.pdf");
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    StringWriter sw = new StringWriter();
    HtmlTextWriter hw = new HtmlTextWriter(sw);
    gvChart.RenderControl(hw);
    StringReader sr = new StringReader(sw.ToString());
    Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 100f, 0f);
    HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
    PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
    pdfDoc.Open();
    htmlparser.Parse(sr);
    pdfDoc.Close();
    Response.Write(pdfDoc);
    Response.End();
}

public override void VerifyRenderingInServerForm(Control control)
{
    /* Verifies that the control is rendered */
}

public byte[] imageToByteArray(System.Drawing.Image imageIn)
{
    MemoryStream ms = new MemoryStream();
    imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
    return ms.ToArray();
}

protected string GetUrl(string imagepath)
{
    imagepath = imagepath.Replace("~/", "");
    string[] splits = Request.Url.AbsoluteUri.Split('/');
    if (splits.Length >= 2)
    {
        string url = splits[0] + "//";
        for (int i = 2; i < splits.Length - 1; i++)
        {
            url += splits[i];
            url += "/";
        }
        return url + imagepath;
    }
    return imagepath;
}