C#实现数据导出Excel工作表

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using Microsoft.Office.Interop.Excel;

using System.Windows.Forms;

namespace SunflowerSaleBook.BLL

{

/// <summary>

/// 打印和导出中间处理类

/// </summary>

public class Printwithderivative

{

/// <summary>

/// 导出Excel

/// </summary>

/// <param name="dt">要导出的DataTable</param>

public static void ExportToExcel(System.Data.DataTable dt)

{

if (dt == null) return;

//实例化Excel全局(本地服务器)

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

if (xlApp == null)

{

MessageBox.Show("无法创建Excel对象，可能您的电脑未安装Excel");

return;

}

//选择文件保存位置

System.Windows.Forms.SaveFileDialog saveDia = new SaveFileDialog();

saveDia.Filter = "Excel|*.xls";//文件格式

saveDia.Title = "导出为Excel文件";//标题

//确定保存

if (saveDia.ShowDialog() == System.Windows.Forms.DialogResult.OK

&& !string.Empty.Equals(saveDia.FileName))

{

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

Microsoft.Office.Interop.Excel.Range range = null;

long totalCount = dt.Rows.Count;//行总数

long rowRead = 0;

float percent = 0;

string fileName = saveDia.FileName;//文件名称

//写入标题

for (int i = 0; i < dt.Columns.Count; i++)

{

worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName;

range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1];

//range.Interior.ColorIndex = 15;//背景颜色

range.Font.Bold = true;//粗体

range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter;//居中

//加边框

range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null);

//range.ColumnWidth = 4.63;//设置列宽

//range.EntireColumn.AutoFit();//自动调整列宽

//r1.EntireRow.AutoFit();//自动调整行高

}

//写入内容

for (int r = 0; r < dt.DefaultView.Count; r++)

{

for (int i = 0; i < dt.Columns.Count; i++)

{

worksheet.Cells[r + 2, i + 1] = dt.DefaultView[r][i];

range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[r + 2, i + 1];

range.Font.Size = 9;//字体大小

//加边框

range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null);

range.EntireColumn.AutoFit();//自动调整列宽

}

rowRead++;

percent = ((float)(100 * rowRead)) / totalCount;

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(fileName);

}

catch (Exception ex)

{

MessageBox.Show("导出文件时出错,文件可能正被打开！\n" + ex.Message);

return;

}

//关闭导出进程，回收

workbooks.Close();

if (xlApp != null)

{

xlApp.Workbooks.Close();

xlApp.Quit();

int generation = System.GC.GetGeneration(xlApp);

System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);

xlApp = null;

System.GC.Collect(generation);

}

GC.Collect();//强行销毁

//强行释放最近打开的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();

}

MessageBox.Show("导出成功!");

}

}

internal static void ExportToExcel()

{

throw new NotImplementedException();

}

}

}