Sql数据保存到Excel文件中

        public string ExportExcel( DataSet ds,string saveFileName)

        {

            try

            {

                if (ds == null) 

                    return "数据库为空";

         

                bool fileSaved = false;







                Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();



                if (xlApp == null)

                {

                    return "无法创建Excel对象，可能您的机子未安装Excel";

                }



                Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;

                Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);

                Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1

                //写入字段

                for (int i = 0; i < ds.Tables[0].Columns.Count; i++)

                {

                    worksheet.Cells[1, i + 1] = ds.Tables[0].Columns[i].ColumnName;

                }

                //写入数值



                for (int r = 0; r < ds.Tables[0].Rows.Count; r++)

                {

                    for (int i = 0; i < ds.Tables[0].Columns.Count; i++)

                    {

                        worksheet.Cells[r + 2, i + 1] = ds.Tables[0].Rows[r][i];

                    }

                    System.Windows.Forms.Application.DoEvents();

                }

                worksheet.Columns.EntireColumn.AutoFit();//列宽自适应。

                if (saveFileName != "")

                {

                    try

                    {

                        workbook.Saved = true;

                        workbook.SaveCopyAs(saveFileName);

                        fileSaved = true;

                    }

                    catch (Exception ex)

                    {

                        fileSaved = false;

                        MessageBox.Show("导出文件时出错,文件可能正被打开！\n" + ex.Message);

                    }

                }

                else

                {

                    fileSaved = false;

                }

                xlApp.Quit();

                GC.Collect();//强行销毁

                if (fileSaved && System.IO.File.Exists(saveFileName)) System.Diagnostics.Process.Start(saveFileName); //打开EXCEL

                return "成功保存到Excel";

            }

            catch (Exception ex)

            {

                return ex.ToString();

            }

        }