C#WinForm 直接导出DataGridView数据到Excel表格的二种方法对比

方法一、利用微软的excel 操作类

 

引用：using Excel = Microsoft.Office.Interop.Excel;

 

代码如下:

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#region导出数据表：Excle (微软的excel 操作类)         ///<summary>         ///导出数据表：Excle         ///</summary>         ///<param name="myDGV"></param>         public void _ToExcel(DataGridView myDGV)         {             string path = "";             SaveFileDialog saveDialog = new SaveFileDialog();             saveDialog.DefaultExt = "xlsx";             saveDialog.Filter = "Excel文件|*.xlsx";             saveDialog.ShowDialog();             path = saveDialog.FileName;             if (path.IndexOf(":") < 0) return; //判断是否点击取消             try             {                 Excel.Application xlApp = new Excel.Application();                 if (xlApp == null)                 {                     MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel");                     return;                 }                 Excel.Workbooks workbooks = xlApp.Workbooks;                 Excel.Workbook workbook = workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);                 Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];//取得sheet1                 int colIndex = 0;                 //写入标题                 for (int i = 0; i < myDGV.ColumnCount; i++)                 {                     if (myDGV.Columns[i].Visible)//用作于不导出隐藏列                     {                         colIndex++;                         worksheet.Cells[1, colIndex] = myDGV.Columns[i].HeaderText;                         //worksheet.Cells[1, i] = myDGV.Columns[i].HeaderText;                     }                 }                 //写入数值                 for (int r = 0; r < myDGV.Rows.Count - 1; r++)                 {                     colIndex = 0;                     for (int i = 0; i < myDGV.ColumnCount; i++)                     {                         if (myDGV.Columns[i].Visible)                         {                             colIndex++;                             worksheet.Cells[r + 2, colIndex] = myDGV.Rows[r].Cells[i].Value;                         }                     }                     System.Windows.Forms.Application.DoEvents();                 }                 worksheet.Columns.EntireColumn.AutoFit();//列宽自适应                 if (path != "")                 {                     try                     {                         workbook.Saved = true;                         workbook.SaveCopyAs(path);                         //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\r" + ex.Message);                     }                 }                 xlApp.Quit();                 GC.Collect();//强行销毁                 // if (fileSaved && System.IO.File.Exists(saveFileName)) System.Diagnostics.Process.Start(saveFileName); //打开EXCEL                    MessageBox.Show(path + "，导出成功", "系统提示", MessageBoxButtons.OK);             }             catch (Exception ex)             {                 MessageBox.Show(ex.Message);             }          }         #endregion

 

方法二、IO基础流操作类

 

引用：using System.IO;

using System.Threading;

 

代码如下：

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#region导出数据表：Excle (io流操作类)         ///<summary>         ///导出数据表：Excle (io流操作类)         ///</summary>         ///<param name="myDGV"></param>         public void _ToExcel2(DataGridView myDGV)         {             string path = "";             SaveFileDialog saveDialog = new SaveFileDialog();             saveDialog.DefaultExt = "xls";             saveDialog.Filter = "Excel97-2003 (*.xls)|*.xls|All Files (*.*)|*.*";             saveDialog.ShowDialog();             path = saveDialog.FileName;             if (path.IndexOf(":") < 0) return; //判断是否点击取消             try             {                 Thread.Sleep(1000);                 StreamWriter sw = new StreamWriter(path, false, Encoding.GetEncoding("gb2312"));                 StringBuilder sb = new StringBuilder();                 //写入标题                 for (int k = 0; k < myDGV.Columns.Count; k++)                 {                     if (myDGV.Columns[k].Visible)//导出可见的标题                     {                         //"\t"就等于键盘上的Tab,加个"\t"的意思是: 填充完后进入下一个单元格.                         sb.Append(myDGV.Columns[k].HeaderText.ToString().Trim() + "\t");                     }                 }                 sb.Append(Environment.NewLine);//换行                 //写入每行数值                 for (int i = 0; i < myDGV.Rows.Count - 1; i++)                 {                     System.Windows.Forms.Application.DoEvents();                     for (int j = 0; j < myDGV.Columns.Count; j++)                     {                         if (myDGV.Columns[j].Visible)//导出可见的单元格                         {                             //注意单元格有一定的字节数量限制,如果超出,就会出现两个单元格的内容是一模一样的.                             //具体限制是多少字节,没有作深入研究.                             sb.Append(myDGV.Rows[i].Cells[j].Value.ToString().Trim() + "\t");                         }                     }                     sb.Append(Environment.NewLine); //换行                 }                 sw.Write(sb.ToString());                 sw.Flush();                 sw.Close();                 MessageBox.Show(path + "，导出成功", "系统提示", MessageBoxButtons.OK);             }             catch (Exception ex)             {                 MessageBox.Show(ex.Message);             }          }         #endregion

 

         二种方法对比，利用IO基础流导出到Excel表格中的速度最快。特别是上10万行以上的数据，更是能体现其速度。