Export MS ChartImage to PPT

我正在尝试将图表图像导出到PPT中，即一张幻灯片中的每个图像，下面是我的代码

 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;
        }

当我运行这个时，一切都在localHost中工作正常，但是当我托管这个应用程序IIS7时，它抛出异常PowerPoint无法打开文件。所以我认为最好添加响应头，所以我遵循下面的代码

dt是数据表名称，其中包含了当我点击SaveImage时保存的图像路径

 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();

这里我可以添加图片到PPT中，但是它们在同一张幻灯片中，并且图片相互重叠