Exception from HRESULT: 0x800A03EC

{

				//dv为要输出到Excel的数据

				Excel.Application excel;// = new Application();



				int rowIndex = 1;



				int colIndex = 1;



				Excel._Workbook xBk;



				Excel._Worksheet xSt;



				excel = new Excel.ApplicationClass();



				xBk = excel.Workbooks.Add(true);



				xSt = (Excel._Worksheet)xBk.ActiveSheet;



				xSt.Name = "Summary";

				



				//取得列标题				

				foreach (DataColumn col in dv.Table.Columns)

				{//好像在这个循环里抛出的异常



					excel.Cells[rowIndex, colIndex] = col.ColumnName;



					xSt.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter;//设置标题格式为居中对齐

					xSt.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).Font.Bold = true;

					xSt.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).Font.Name = "Arial";

					xSt.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).Font.Size = "8";



					colIndex++;

				}			



				//取得表格中的数据		



				foreach (DataRowView row in dv)

				{

					colIndex = 1;



					rowIndex++;



					foreach (DataColumn col in dv.Table.Columns)

					{

						excel.Cells[rowIndex, colIndex] = row[col.ColumnName].ToString();



						xSt.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).HorizontalAlignment = Excel.XlHAlign.xlHAlignLeft;//设置字符型的字段格式为左对齐

						xSt.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).Font.Name = "Arial";

						xSt.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).Font.Size = "8";

						colIndex++;



					}



				}



				int rowSum = rowIndex;

				colIndex--;

				



				//设置报表表格为最适应宽度				



				xSt.get_Range(excel.Cells[1, 1], excel.Cells[rowSum, colIndex]).Select();



				xSt.get_Range(excel.Cells[1, 1], excel.Cells[rowSum, colIndex]).Columns.AutoFit();

                				



				//冻结

				excel.ActiveWindow.SplitColumn = 1;

				excel.ActiveWindow.SplitRow = 1;

				excel.ActiveWindow.Split = true;

				excel.ActiveWindow.FreezePanes = true;

				

				//显示效果				

				HttpContext curContext = HttpContext.Current;



				xBk.SaveCopyAs(curContext.Server.MapPath(".") + "\\" + fileName + ".xls");



				//ds = null;



				xBk.Close(false, null, null);



				excel.Quit();



				System.Runtime.InteropServices.Marshal.ReleaseComObject(xBk);



				System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);



				System.Runtime.InteropServices.Marshal.ReleaseComObject(xSt);



				xBk = null;



				excel = null;



				xSt = null;



				string path = curContext.Server.MapPath(fileName + ".xls");



				FileInfo file = new FileInfo(path);



				curContext.Response.Clear();



				curContext.Response.Charset = "GB2312";



				curContext.Response.ContentEncoding = Encoding.UTF8;



				// 添加头信息，为"文件下载/另存为"对话框指定默认文件名



				curContext.Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);



				// 添加头信息，指定文件大小，让浏览器能够显示下载进度



				curContext.Response.AddHeader("Content-Length", file.Length.ToString());



				// 指定返回的是一个不能被客户端读取的流，必须被下载



				curContext.Response.ContentType = "application/ms-excel";



				// 把文件流发送到客户端



				curContext.Response.WriteFile(file.FullName);



				curContext.Response.Flush();



				File.Delete(file.FullName);

			}

			catch (Exception ex)

			{

				Loger.writeExceptionLog(ex.Message);

				throw ex;

			}