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最近需要将DataGridView 中的数据导出到Excel,已做不时之需!所以,网上搜了下相关资料,这部分资料还是很全的,只是都有些小bug。我做了下整理和修复。贴在这里备自己以后用,方便,也便于大家分享!
1. 安装Microsoft.Office.Interop.Excel 。这里我是按照Nuget 安装的 (引用->管理NuGet程序包->浏览-> 安装Microsoft.Office.Interop.Excel)。这里需要注意的是:创建Excel对象的时候,Microsoft.Office.Interop.Excel.Application xlApp = new ApplicationClass();这里会报错,解决方式是:找到引用的引用。然后右键属性,设置嵌入互操作类型为false!
2. Copy代码。这里是封装到一个Class里面了。便于后面调用。
using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Text;
using System.Diagnostics;
using System.IO;
using Microsoft.Office.Interop.Excel;
namespace UI
{
public class ExportDGVToExcel
{
private const int OLDOFFICEVESION = -4143;
private const int NEWOFFICEVESION = 56;
/// <summary>
/// DataGridView导出Excel
/// </summary>
/// <param name="strCaption">Excel文件中的标题</param>
/// <param name="myDGV">DataGridView 控件</param>
/// <returns>0:成功;1:DataGridView中无记录;2:Excel无法启动;100:Cancel;9999:异常错误</returns>
public int ExportExcel(string strCaption, DataGridView myDGV, SaveFileDialog saveFileDialog)
{
saveFileDialog.Filter = "Execl files (*.xls)|*.xls";
saveFileDialog.FilterIndex = 0;
saveFileDialog.RestoreDirectory = true;
//saveFileDialog.CreatePrompt = true;
saveFileDialog.Title = "Export Excel File";
if (saveFileDialog.ShowDialog() == DialogResult.OK)
{
if (saveFileDialog.FileName == "")
{
MessageBox.Show("请输入保存文件名!");
saveFileDialog.ShowDialog();
}
// 列索引,行索引,总列数,总行数
int ColIndex = 0, RowIndex = 0;
int ColCount = myDGV.ColumnCount, RowCount = myDGV.RowCount;
if (myDGV.RowCount == 0)
{
return 1;
}
// 创建Excel对象
Microsoft.Office.Interop.Excel.Application xlApp = new ApplicationClass();
if (xlApp == null)
{
return 2;
}
try
{
// 创建Excel工作薄
Workbook xlBook = xlApp.Workbooks.Add(true);
Worksheet xlSheet = (Worksheet)xlBook.Worksheets[1];
////Get excel Version
string Version = xlApp.Version;
//保存excel文件的格式
int FormatNum;
if (Convert.ToDouble(Version) < 12)
{
//使用Excel 97-2003
FormatNum = OLDOFFICEVESION;
}
else
{
//使用 excel 2007或更新
FormatNum = NEWOFFICEVESION;
}
// 设置标题
//标题所占的单元格数与DataGridView中的列数相同
Range range = xlSheet.get_Range(xlApp.Cells[1, 1], xlApp.Cells[1, ColCount]);
range.MergeCells = true;
xlApp.ActiveCell.FormulaR1C1 = strCaption;
xlApp.ActiveCell.Font.Size = 20;
xlApp.ActiveCell.Font.Bold = true;
xlApp.ActiveCell.HorizontalAlignment = Constants.xlCenter;
// 创建缓存数据
object[,] objData = new object[RowCount + 1, ColCount];
//获取列标题
foreach (DataGridViewColumn col in myDGV.Columns)
{
objData[RowIndex, ColIndex++] = col.HeaderText;
}
// 获取数据
for (RowIndex = 1; RowIndex < RowCount; RowIndex++)
{
for (ColIndex = 0; ColIndex < ColCount; ColIndex++)
{
//这里就是验证DataGridView单元格中的类型,如果是string或是DataTime类型,则在放入缓存时在该内容前加入" ";
if (myDGV[ColIndex, RowIndex - 1].ValueType == typeof(string)
|| myDGV[ColIndex, RowIndex - 1].ValueType == typeof(DateTime))
{
objData[RowIndex, ColIndex] = "";
if (myDGV[ColIndex, RowIndex - 1].Value != null)
{
objData[RowIndex, ColIndex] = "" + myDGV[ColIndex, RowIndex - 1].Value.ToString();
}
}
else
{
objData[RowIndex, ColIndex] = myDGV[ColIndex, RowIndex - 1].Value;
}
}
System.Windows.Forms.Application.DoEvents();
}
// 写入Excel
range = xlSheet.get_Range(xlApp.Cells[2, 1], xlApp.Cells[RowCount+1, ColCount]);
range.Value2 = objData;
xlBook.Saved = true;
xlBook.SaveAs(saveFileDialog.FileName, FormatNum);
}
catch (Exception err)
{
MessageBox.Show("Err:" + err.Message);
return 9999;
}
finally
{
xlApp.Quit();
GC.Collect(); //强制回收
}
return 0;
}
return 100;
}
}
}
3. 调用。exportDataToExcel.ExportExcel("项目总表", dgv_ProjectManage, dialog); 这就是就是调用的method!
private void bt_ExportProjectDGV_Click(object sender, EventArgs e)
{
SaveFileDialog dialog = new SaveFileDialog();
ExportDGVToExcel exportDataToExcel = new ExportDGVToExcel();
int ret = exportDataToExcel.ExportExcel("项目总表", dgv_ProjectManage, dialog);
if (ret == 0)
{
MessageBox.Show("导出项目总表成功");
}
else if (ret != 100)
{
MessageBox.Show("导出项目总表失败");
}
}
4. 说明: 这里,所有的导出都是将DGV里面的所有的Column 和Row 导出到Excel! 如果有需要过滤掉某些Column的可以自己再进行封装处理就好了!