c# - MS ChartImage を PPT にエクスポート

Question

チャート画像をPPTにエクスポートしようとしています。つまり、1つのスライドの各画像です。以下は私のコードです

 String strTemplate, strPic;
            strTemplate = "C:\\Program Files (x86)\\Microsoft Office\\Templates\\Presentation Designs\\Maple.GIF";

            //strPic = @"C:\Users\rongala.ganesh\Pictures\arrow_left_green_large.png";

            bool bAssistantOn;

            Microsoft.Office.Interop.PowerPoint.Application objApp;
            Microsoft.Office.Interop.PowerPoint.Presentations objPresSet;
            Microsoft.Office.Interop.PowerPoint._Presentation objPres;
            Microsoft.Office.Interop.PowerPoint.Slides objSlides;
            Microsoft.Office.Interop.PowerPoint._Slide objSlide;
            Microsoft.Office.Interop.PowerPoint.TextRange objTextRng;
            Microsoft.Office.Interop.PowerPoint.Shapes objShapes;
            Microsoft.Office.Interop.PowerPoint.Shape objShape;
            Microsoft.Office.Interop.PowerPoint.SlideShowWindows objSSWs;
            Microsoft.Office.Interop.PowerPoint.SlideShowTransition objSST;
            Microsoft.Office.Interop.PowerPoint.SlideShowSettings objSSS;
            Microsoft.Office.Interop.PowerPoint.SlideRange objSldRng;
            //Create a new presentation based on a template.
            objApp = new Microsoft.Office.Interop.PowerPoint.Application();
            objApp.Visible = MsoTriState.msoTrue;
            objPresSet = objApp.Presentations;
            objPres = objPresSet.Open(strTemplate,
                 MsoTriState.msoFalse, MsoTriState.msoTrue, MsoTriState.msoTrue);
            objSlides = objPres.Slides;
            //Build Slide #1:
            //Add text to the slide, change the font and insert/position a
            //picture on the first slide.
            objSlide = objSlides.Add(1, Microsoft.Office.Interop.PowerPoint.PpSlideLayout.ppLayoutTitleOnly);
            objTextRng = objSlide.Shapes[1].TextFrame.TextRange;
            // objTextRng.Text = "FAME Presentation";
            objTextRng.Font.Name = "Comic Sans MS";
            objTextRng.Font.Size = 25;
            foreach (var ar in arr)
            {
                // ScriptManager.RegisterClientScriptBlock(this.Page,typeof(string),"alert"
                objSlide = objSlides.Add(1, Microsoft.Office.Interop.PowerPoint.PpSlideLayout.ppLayoutTitleOnly);
                objTextRng = objSlide.Shapes[1].TextFrame.TextRange;
                // objTextRng.Text = "FAME Presentation";
                objTextRng.Font.Name = "Comic Sans MS";
                objTextRng.Font.Size = 25;
                string[] str = (string[])ar;
                strPic = str[0];
                objSlide.Shapes.AddPicture(strPic, MsoTriState.msoFalse, MsoTriState.msoTrue,
                      150, 150, 500, 350);
                objTextRng = objSlide.Shapes[1].TextFrame.TextRange;
                objTextRng.Text = str[1];
                objTextRng.Font.Name = "Comic Sans MS";
                objTextRng.Font.Size = 48;

                //Build Slide #2:
                //Add text to the slide title, format the text. Also add a chart to the
                //slide and change the chart type to a 3D pie chart.

                //Build Slide #3:
                //Change the background color of this slide only. Add a text effect to the slide
                //and apply various color schemes and shadows to the text effect.
            }



        }
        catch (Exception ex)
        {

            throw ex;
        }

これを実行すると、すべてが localHost で正常に動作しますが、このアプリケーション IIS7 をホストすると、例外 PowerPoint でファイルを開けませんでした。したがって、応答ヘッダーを追加する方が良いと考えたので、以下のコードに従いました

dtSaveImageをクリックしたときに保存された画像のパスを含むDataTable Nameです

 GridView1.AllowPaging = false;

            GridView1.DataSource = dt;
            GridView1.DataBind();////////write this code only if paging is enabled.

            Response.Clear();

            Response.AddHeader("content-disposition", "attachment;filename=FileName.ppt");///////for text file write FileName.txt

            Response.Charset = "";
            // If you want the option to open the Excel file without saving than

            // comment out the line below
            // Response.Cache.SetCacheability(HttpCacheability.NoCache);

            Response.ContentType = "application/vnd.ppt";//for text file write vnd.txt



            System.IO.StringWriter stringWrite = new System.IO.StringWriter();
            System.Web.UI.HtmlTextWriter htmlWrite =

            new HtmlTextWriter(stringWrite);
            GridView1.RenderControl(htmlWrite);

            Response.Write(stringWrite.ToString());

            Response.End();

ここで PPT に画像を追加できますが、それらは同じスライドにあり、画像が互いに重なっています。