C#中将DataGridView中的数据导入到Csv文件及导出到Excel

 public static bool dataGridViewToCSV(DataGridView dataGridView)         {             if (dataGridView.Rows.Count == 0)             {                 MessageBox.Show("没有数据可导出!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);                 return false;             }             SaveFileDialog saveFileDialog = new SaveFileDialog();             saveFileDialog.Filter = "CSV files (*.csv)|*.csv";             saveFileDialog.FilterIndex = 0;             saveFileDialog.RestoreDirectory = true;             saveFileDialog.CreatePrompt = true;             saveFileDialog.FileName = null;             saveFileDialog.Title = "保存";             if (saveFileDialog.ShowDialog() == DialogResult.OK)             {                 Stream stream = saveFileDialog.OpenFile();                 StreamWriter sw = new StreamWriter(stream, System.Text.Encoding.GetEncoding(-0));                 string strLine = "";                 try                 {                     //表头                     for (int i = 0; i < dataGridView.ColumnCount; i++)                     {                         if (i > 0)                             strLine += ",";                         strLine += dataGridView.Columns[i].HeaderText;                     }                     strLine.Remove(strLine.Length - 1);                     sw.WriteLine(strLine);                     strLine = "";                     //表的内容                     for (int j = 0; j < dataGridView.Rows.Count; j++)                     {                         strLine = "";                         int colCount = dataGridView.Columns.Count;                         for (int k = 0; k < colCount; k++)                         {                             if (k > 0 && k < colCount)                                 strLine += ",";                             if (dataGridView.Rows[j].Cells[k].Value == null)                                 strLine += "";                             else                             {                                 string cell = dataGridView.Rows[j].Cells[k].Value.ToString().Trim();                                 //防止里面含有特殊符号                                 cell = cell.Replace("\"", "\"\"");                                 cell = "\"" + cell + "\"";                                 strLine += cell;                             }                         }                         sw.WriteLine(strLine);                     }                     sw.Close();                     stream.Close();                     MessageBox.Show("数据被导出到：" + saveFileDialog.FileName.ToString(), "导出完毕", MessageBoxButtons.OK, MessageBoxIcon.Information);                 }                 catch (Exception ex)                 {                     MessageBox.Show(ex.Message, "导出错误", MessageBoxButtons.OK, MessageBoxIcon.Information);                     return false;                 }             }             return true;         }

2，C#中将DataGridView中的数据导出到Excel中

public static bool dataGridViewToExcel(DataGridView dataGridView)         {             if (dataGridView.Rows.Count == 0)             {                 MessageBox.Show("没有数据可导出!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);                 return false;             }             string fileName = "";             string saveFileName = "";             SaveFileDialog saveDialog = new SaveFileDialog();             saveDialog.DefaultExt = "xlsx";             saveDialog.Filter = "Excel文件|*.xlsx";             saveDialog.FileName = fileName;             saveDialog.ShowDialog();             saveFileName = saveDialog.FileName;             if (saveFileName.IndexOf(":") < 0)                 return false; //被点了取消             Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();             if (xlApp == null)             {                 MessageBox.Show("无法创建Excel对象，您的电脑可能未安装Excel");                 return false;             }             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                                                                                           //写入标题                          for (int i = 0; i < dataGridView.ColumnCount; i++)             { worksheet.Cells[1, i + 1] = dataGridView.Columns[i].HeaderText; }             //写入数值             for (int r = 0; r < dataGridView.Rows.Count; r++)             {                 for (int i = 0; i < dataGridView.ColumnCount; i++)                 {                     worksheet.Cells[r + 2, i + 1] = dataGridView.Rows[r].Cells[i].Value;                 }                 System.Windows.Forms.Application.DoEvents();             }             worksheet.Columns.EntireColumn.AutoFit();//列宽自适应             MessageBox.Show(fileName + "资料保存成功", "提示", MessageBoxButtons.OK);             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);                 }             }             xlApp.Quit();             Kill(xlApp);             GC.Collect();//强行销毁                   return true;         }

//*********************************************************************************************//         //*功能：当使用Excel.Application方法的时候，系统会自动创建一个Excel进程，即使当你使用Excel.Quit()之后，也是不会关闭的。        //*参数：通过进程ID来唯一标识我们自己创建的进程，然后在关闭Excel.Application的时候一同将进程Kill掉。        //*返回值：无        //*时间：2018-04-25        //**********************************************************************************************//        public static void Kill(Microsoft.Office.Interop.Excel.Application excel)        {            IntPtr t = new IntPtr(excel.Hwnd);            int k = 0;            GetWindowThreadProcessId(t, out k);            System.Diagnostics.Process p = System.Diagnostics.Process.GetProcessById(k);            p.Kill();        }

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