C# DataTable数据导入Excel数据【转载经过本人测试修改】

/********************************************************
* 如果引用->添加引用->.net选项卡下有->using Microsoft.Office.Interop.Excel;->直接引入
* 如果没有，请把->Microsoft.Office.Interop.Excel.dll->放到Debug目录下->
* 引用->添加引用->浏览选项卡下有->using Microsoft.Office.Interop.Excel;->直接引入
* 然后再类的上边添加using Microsoft.Office.Interop.Excel;
*
*
* ******************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Office.Interop.Excel;
using System.Windows.Forms;

namespace DataGridviewPage
{
class ExcleHelper
{

/// <summary>
///
/// </summary>
/// <param name="dt">需要导出到excel的数据表dt</param>
/// <param name="saveFileName">存储文件名</param>
/// <returns></returns>
public static void DataTableToExcel(System.Data.DataTable dt, string saveFileName)
{
if (dt == null) return;
//-***************获取excel对象***************
//  string saveFileName = "";
TimeSpan dateBegin = new TimeSpan(DateTime.Now.Ticks);
bool fileSaved = false;
SaveFileDialog saveDialog = new SaveFileDialog();
saveDialog.DefaultExt = "xls";
saveDialog.Filter = "Excel文件|*.xls";
saveDialog.FileName = "导入记录查询结果 " + DateTime.Today.ToString("yyyy-MM-dd");
saveDialog.ShowDialog();
saveFileName = saveDialog.FileName;
if (saveFileName.IndexOf(":") < 0) return; //被点了取消
Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
if (xlApp == null)
{
MessageBox.Show("无法启动Excel，可能您未安装Excel");
return;
}
Microsoft.Office.Interop.Excel.Workbook workbook = xlApp.Workbooks.Add(true);
Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];
Microsoft.Office.Interop.Excel.Range range;

// 列索引，行索引，总列数，总行数
int colIndex = 0;
int RowIndex = 0;
int colCount = dt.Columns.Count;
int RowCount = dt.Rows.Count;

// *****************获取数据*********************

// 创建缓存数据
object[,] objData = new object[RowCount+1, colCount];
// 获取列标题
for (int i = 0; i < dt.Columns.Count; i++)
{
objData[RowIndex, colIndex++] = dt.Columns[i].Caption; // dgv.Columns[i].HeaderText;
}

// 获取具体数据
for (RowIndex = 0; RowIndex < RowCount; RowIndex++)
{
for (colIndex = 0; colIndex < colCount; colIndex++)
{
objData[RowIndex+1, colIndex] = dt.Rows[RowIndex][colIndex];
}

}

//*******************设置输出格式******************************

//设置顶部説明   合并的单元格
range = worksheet.get_Range(xlApp.Cells[1, 1], xlApp.Cells[1, colCount]);
range.MergeCells = true;
range.RowHeight = 38;
range.Font.Bold = true;
range.Font.Size = 14;
range.Font.ColorIndex = 10;//字体颜色
xlApp.ActiveCell.FormulaR1C1 = "导入记录查询结果";

//特殊数字格式
//range = worksheet.get_Range(xlApp.Cells[2, colCount], xlApp.Cells[RowCount, colCount]);

xlApp.Cells.HorizontalAlignment = Microsoft.Office.Interop.Excel.Constants.xlCenter;
range = worksheet.get_Range(xlApp.Cells[2, 1], xlApp.Cells[2, colCount]);

range.Font.Bold = true;
range.RowHeight = 20;

//********************* 写入Excel*******************

range = worksheet.get_Range(xlApp.Cells[2, 1], xlApp.Cells[RowCount+2, colCount]);
range.Value2 = objData;
System.Windows.Forms.Application.DoEvents();

//***************************保存**********************

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

TimeSpan dateEnd = new TimeSpan(DateTime.Now.Ticks);
TimeSpan tspan = dateBegin.Subtract(dateEnd).Duration();
MessageBox.Show("导出成功，用时" + tspan.ToString() + "秒");
if (fileSaved && System.IO.File.Exists(saveFileName))
System.Diagnostics.Process.Start(saveFileName); //保存成功后打开此文件
}
}

}