.Net DataTable导出到Excel

	/// <summary>
    /// 打印方法
    /// </summary>
    /// <param name="dt">需要打印的数据表</param>
    /// <param name="message">返回的具体文字信息</param>
    /// <returns>返回打印是否成功</returns>
    public static bool Print(DataTable dt, out string ls_msg)
    {
        bool bl_result = true;
        if (dt == null)
        {
            bl_result = false;
            ls_msg = "DataTable为null！";
            return bl_result;
        }

        string saveFileName = "";
        SaveFileDialog saveDialog = new SaveFileDialog();
        saveDialog.DefaultExt = "xls";
        saveDialog.Filter = "Excel文件|*.xls|*.xlsx|*.*";
        DialogResult dr = saveDialog.ShowDialog();

        saveFileName = saveDialog.FileName;

        //被点了取消
        if (saveDialog.ShowDialog() != DialogResult.OK || saveFileName.IndexOf(":") < 0)
        {
            bl_result = false;
            ls_msg = "";
            return bl_result;
        }

        if (System.IO.File.Exists(saveFileName))//检察文件是否已存在，存在就把之前的删掉
        {
            try
            {
                File.Delete(saveFileName);
            }
            catch (Exception ex)
            {
                bl_result = false;
                ls_msg = ex.Message;
                return bl_result;
            }
        }

        // 创建Excel应用程序对象
        Microsoft.Office.Interop.Excel.Application excApp = new Microsoft.Office.Interop.Excel.Application();
        Microsoft.Office.Interop.Excel.Workbook workBook = excApp.Workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
        Microsoft.Office.Interop.Excel.Worksheet workSeet = workBook.Worksheets[1]; //取得sheet1
        Microsoft.Office.Interop.Excel.Range range = null;
        int tableCount = dt.Rows.Count;
        int rowRead = 0;
        float percent = 0;
        for (int i = 0; i < dt.Columns.Count; i++)
        {
            workSeet.Cells[1, i + 1] = dt.Columns[i].ColumnName;

            //设置标题的样式
            range = (Microsoft.Office.Interop.Excel.Range)workSeet.Cells[1, i + 1];
            range.Font.Bold = true; //粗体
            range.Font.Size = 12;//字体大小
            range.Font.Name = "宋体";
            range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter; //居中
            range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null); //背景色
            range.EntireColumn.AutoFit(); //自动设置列宽
            range.EntireRow.AutoFit(); //自动设置行高
        }
        for (int r = 0; r < dt.Rows.Count; r++)
        {
            for (int c = 0; c < dt.Columns.Count; c++)
            {
                //写入内容
                workSeet.Cells[r + 2, c + 1] = "'" + dt.Rows[r][c].ToString();
                //设置样式
                range = (Microsoft.Office.Interop.Excel.Range)workSeet.Cells[r + 2, c + 1];
                range.Font.Size = 10; //字体大小
                range.Font.Name = "宋体";
                range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null); //加边框
                range.EntireColumn.AutoFit(); //自动调整列宽
            }
            rowRead++;
            percent = ((float)(100 * rowRead)) / tableCount;
            System.Windows.Forms.Application.DoEvents();
        }

        range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;
        if (dt.Columns.Count > 1)
        {
            range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;
        }
        try
        {
            workBook.Saved = true;
            workBook.SaveCopyAs(saveFileName);
        }
        catch { }
        workBook.Close();
        if (excApp != null)
        {
            excApp.Workbooks.Close();
            excApp.Quit();
            int generation = System.GC.GetGeneration(excApp);
            System.Runtime.InteropServices.Marshal.ReleaseComObject(excApp);
            excApp = null;
            System.GC.Collect(generation);
        }
        GC.Collect(); //强行销毁
        #region 强行杀死最近打开的Excel进程
        System.Diagnostics.Process[] excelProc = System.Diagnostics.Process.GetProcessesByName("EXCEL");
        System.DateTime startTime = new DateTime();
        int m, killID = 0;
        for (m = 0; m < excelProc.Length; m++)
        {
            if (startTime < excelProc[m].StartTime)
            {
                startTime = excelProc[m].StartTime;
                killID = m;
            }
        }
        if (excelProc[killID].HasExited == false)
        {
            excelProc[killID].Kill();
        }
        #endregion

        ls_msg = "成功";
        return true;
    }

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标签：Office,Interop,Excel,Microsoft,range,dt,Net,DataTable
来源： https://blog.csdn.net/qq_38596402/article/details/104516443