上次寫了一個用文件流方式將Datatable導出Excel的方法，這個方法有局限性，比如沒法對Excel進行一些增加列顏色等簡單的操作，現在，給大家介紹另外一種方法，用微軟的Excel類。既然要用到類，那必須是你的機子要裝上Excel才行呢。

public? void DataTabletoExcel(System.Data.DataTable[] tmpDataTable,string date1,string date2)

???????? {

???????????? string saveFileName = "";

???????????????????????? SaveFileDialog saveDialog = new SaveFileDialog();

???????????? saveDialog.DefaultExt = "xls";

???????????? saveDialog.Filter = "Excel 文件|*.xls";

??????????????????????? saveDialog.ShowDialog();

???????????? saveFileName = saveDialog.FileName;

???????????? if (saveFileName.IndexOf(":") < 0)

????????????????? ?return; //被點了取消

????????????? for (int k = 0; k < tmpDataTable.Length; k++)

???????????? {

???????????????? //if (k % 50 == 0)

???????????????? //{

???????????????????? Process[] processes = Process.GetProcesses();

???????????????????? foreach (Process process in processes)

???????????????????? {

???????????????????????? if (process.ProcessName == "EXCEL")

???????????????????????? {

???????????????????????????? if (string.IsNullOrEmpty(process.MainWindowTitle))

???????????????????????????? {

???????????????????????????????? process.Kill();

???????????????????????????? }

???????????????????????????????????????????????????? }

???????????????????? }

?????????????????? //}

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

???????????????? try

???????????????? {?

??????????????????? #region

???????????????????? if (tmpDataTable[k] == null)

??????????????????????? return;

???????????????????? string name=string.Empty;

???????????????????? if (grid_Result1.GetGridView.Columns["STR_1"].Visible == false && grid_Result1.GetGridView.Columns["STR_8"].Visible == false)

???????????????????????? name = tmpDataTable[k].Rows[0][0].ToString();

???????????????????? if (grid_Result1.GetGridView.Columns["STR_1"].Visible == false && grid_Result1.GetGridView.Columns["STR_8"].Visible == true)

???????????????????????? name = tmpDataTable[k].Rows[0][1].ToString();

???????????????????? if (grid_Result1.GetGridView.Columns["STR_1"].Visible == true && grid_Result1.GetGridView.Columns["STR_8"].Visible == true)

???????????????????????? name = tmpDataTable[k].Rows[0][2].ToString();

???????????????????? if (grid_Result1.GetGridView.Columns["STR_1"].Visible == true && grid_Result1.GetGridView.Columns["STR_8"].Visible == false)

???????????????????????? name = tmpDataTable[k].Rows[0][1].ToString();

???????????????????? if (name.IndexOf("/") > -1)

???????????????????? {

???????????????????????? name = name.Replace("/", " ");

???????????????????? }

???????????????????? name = name + date1 + "~" + date2;

???????????????????? saveFileName = saveFileName.Substring(0, saveFileName.LastIndexOf("\\")) + "\\" + name + ".xls";

???????????????????? int rowNum = tmpDataTable[k].Rows.Count;

??????????????????? int columnNum = tmpDataTable[k].Columns.Count;

??????????????????? int rowIndex = 1;

??????????????????? int columnIndex = 0;

???????????????????? xlApp.DefaultFilePath = "";

???????????????????? xlApp.DisplayAlerts = true;

???????????????????? xlApp.SheetsInNewWorkbook = 1;

???????????????????? Workbook xlBook = xlApp.Workbooks.Add(true);

???????????????????? //將DataTable的列名導入Excel表第一行

??????????????????? foreach (DataColumn dc in tmpDataTable[k].Columns)

???????????????????? {

???????????????????????? columnIndex++;

???????????????????????? xlApp.Cells[rowIndex, columnIndex] = dc.ColumnName;

???????????????????? }

???????????????????? //將DataTable中的數據導入Excel中

??????????????????? for (int i = 0; i < rowNum; i++)

???????????????????? {

???????????????????????? rowIndex++;

???????????????????????? columnIndex = 0;

???????????????????????? for (int j = 0; j < columnNum; j++)

???????????????????????? {

???????????????????????????? columnIndex++;

???????????????????????????? xlApp.Cells[rowIndex, columnIndex] = tmpDataTable[k].Rows[i][j].ToString();?

??????????????????????? }

??????????????????? }

??????????????????? if (saveFileName.IndexOf("/") > -1)

???????????????????? {

???????????????????????? saveFileName = saveFileName.Replace("/", "-");

???????????????????? }

???????????????????? System.IO.File.Delete(saveFileName);

???????????????????? xlBook.SaveCopyAs(saveFileName);

???????????????????? Process[] processes1 = Process.GetProcesses();

???????????????????? foreach (Process process in processes1)

???????????????????? {

???????????????????????? if (process.ProcessName == "EXCEL")

???????????????????????? {

???????????????????????????? if (string.IsNullOrEmpty(process.MainWindowTitle))

???????????????????????????? {

???????????????????????????????? process.Kill();

???????????????????????????? }

??????????????????????? }?

??????????????????? }

???????????????????? System.Threading.Thread.Sleep(1000);

???????????????????? #endregion

???????????????? }?

??????????????? catch (Exception ex)

???????????????? {?

??????????????????? XtraMessageBox.Show("導出Excel出錯，原因:" + ex.Message);

???????????????????? return;

???????????????? }

??????? }

?

?

?

轉載于:https://www.cnblogs.com/dogxuefeng/archive/2012/04/09/2439155.html

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