上一篇讲到了如何将DataGrid数据导出到csv 文件，这一章将如何将DataGrid中的数据导出到Excel文件中。
导出的Excel文件如下：
实现代码如下：
创建类 ExportToExcel.cs
using Microsoft.Office;
using System.Windows.Controls;
public class ExportToExcel
{
public bool Export_to_Excel(DataGrid dataGrid, string excelFileName)
{
System.Data.DataTable dt = new System.Data.DataTable();
for (int i = 0; i < dataGrid.Columns.Count; i++)
{
//只导出可见列
if (dataGrid.Columns[i].Visibility == System.Windows.Visibility.Visible)
{
//构建表头
dt.Columns.Add(dataGrid.Columns[i].Header.ToString());
}
}
for (int i = 0; i < dataGrid.Items.Count; i++)
{
int columnsIndex = 0;
System.Data.DataRow row = dt.NewRow();
for (int j = 0; j < dataGrid.Columns.Count; j++)
{
if (dataGrid.Columns[j].Visibility == System.Windows.Visibility.Visible)
{
//var r = dataGrid.Items[i];
//var c = dataGrid.Items[i] as Member;
//var v = dataGrid.Columns[j].GetCellContent(dataGrid.Items[i] as Member);
//填充可见列数据
//if ((dataGrid.Items[i] != null) && (dataGrid.Columns[j].GetCellContent(dataGrid.Items[i] as TextBlock) != null))
if (dataGrid.Items[i] != null && ( dataGrid.Items[i] as Member) !=null)
{
var M = dataGrid.Items[i] as Member;
// row[columnsIndex] = (dataGrid.Columns[j].GetCellContent(dataGrid.Items[i]) as TextBlock).Text.ToString();
if (columnsIndex == 0)
row[columnsIndex] = M.Name;
else if(columnsIndex==1)
row[columnsIndex] = M.Age;
else if (columnsIndex == 2)
row[columnsIndex] = M.Sex;
else if (columnsIndex == 3)
row[columnsIndex] = M.Pass;
else if (columnsIndex == 4)
row[columnsIndex] = M.Email;
}
else
{
row[columnsIndex] = "";
}
columnsIndex++;
}
}
dt.Rows.Add(row);
}
if (Export_to_Table(dt, excelFileName) != null)
{
return true;
}
else
{
return false;
}
}
private string Export_to_Table(System.Data.DataTable DT, string title)
{
try
{
//创建Excel
Microsoft.Office.Interop.Excel.Application ExcelApp = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbook ExcelBook = ExcelApp.Workbooks.Add(System.Type.Missing);
//创建工作表（即Excel里的子表sheet） 1表示在子表sheet1里进行数据导出
Microsoft.Office.Interop.Excel.Worksheet ExcelSheet = (Microsoft.Office.Interop.Excel.Worksheet)ExcelBook.Worksheets[1];
//如果数据中存在数字类型 可以让它变文本格式显示
ExcelSheet.Cells.NumberFormat = "@";
//设置工作表名
ExcelSheet.Name = title;
//设置Sheet标题
string start = "A1";
string end = ChangeASC(DT.Columns.Count) + "1";
Microsoft.Office.Interop.Excel.Range _Range = (Microsoft.Office.Interop.Excel.Range)ExcelSheet.get_Range(start, end);
_Range.Merge(0); //单元格合并动作(要配合上面的get_Range()进行设计)
_Range = (Microsoft.Office.Interop.Excel.Range)ExcelSheet.get_Range(start, end);
_Range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter;
_Range.Font.Size = 22; //设置字体大小
_Range.Font.Name = "宋体"; //设置字体的种类
ExcelSheet.Cells[1, 1] = title; //Excel单元格赋值
_Range.EntireColumn.AutoFit(); //自动调整列宽
//写表头
for (int m = 1; m <= DT.Columns.Count; m++)
{
ExcelSheet.Cells[2, m] = DT.Columns[m - 1].ColumnName.ToString();
start = "A2";
end = ChangeASC(DT.Columns.Count) + "2";
_Range = (Microsoft.Office.Interop.Excel.Range)ExcelSheet.get_Range(start, end);
_Range.Font.Size = 15; //设置字体大小
_Range.Font.Bold = true;//加粗
_Range.Font.Name = "宋体"; //设置字体的种类
_Range.EntireColumn.AutoFit(); //自动调整列宽
_Range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter;
}
//写数据
for (int i = 0; i < DT.Rows.Count; i++)
{
for (int j = 1; j <= DT.Columns.Count; j++)
{
//Excel单元格第一个从索引1开始
// if (j == 0) j = 1;
ExcelSheet.Cells[i + 3, j] = DT.Rows[i][j - 1].ToString();
}
}
//表格属性设置
for (int n = 0; n < DT.Rows.Count + 1; n++)
{
start = "A" + (n + 3).ToString();
end = ChangeASC(DT.Columns.Count) + (n + 3).ToString();
//获取Excel多个单元格区域
_Range = (Microsoft.Office.Interop.Excel.Range)ExcelSheet.get_Range(start, end);
_Range.Font.Size = 12; //设置字体大小
_Range.Font.Name = "宋体"; //设置字体的种类
_Range.EntireColumn.AutoFit(); //自动调整列宽
_Range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter; //设置字体在单元格内的对其方式 _Range.EntireColumn.AutoFit(); //自动调整列宽
}
ExcelApp.DisplayAlerts = false; //保存Excel的时候，不弹出是否保存的窗口直接进行保存
//弹出保存对话框,并保存文件
Microsoft.Win32.SaveFileDialog sfd = new Microsoft.Win32.SaveFileDialog();
sfd.DefaultExt = ".xlsx";
sfd.Filter = "Office 2007 File|*.xlsx|Office 2000-2003 File|*.xls|所有文件|*.*";
sfd.FileName = "ExportDemo";
if (sfd.ShowDialog() == true)
{
if (sfd.FileName != "")
{
ExcelBook.SaveAs(sfd.FileName); //将其进行保存到指定的路径
// MessageBox.Show("导出文件已存储为: " + sfd.FileName, "温馨提示");
}
}
//释放可能还没释放的进程
ExcelBook.Close();
ExcelApp.Quit();
// PubHelper.Instance.KillAllExcel(ExcelApp);
return sfd.FileName;
}
catch (Exception)
{
// MessageBox.Show("导出文件保存失败！", "警告！");
return null;
}
}
///
/// 获取当前列列名,并得到EXCEL中对应的列
///
///
///
private string ChangeASC(int count)
{
string ascstr = "";
switch (count)
{
case 1:
ascstr = "A";
break;
case 2:
ascstr = "B";
break;
case 3:
ascstr = "C";
break;
case 4:
ascstr = "D";
break;
case 5:
ascstr = "E";
break;
case 6:
ascstr = "F";
break;
case 7:
ascstr = "G";
break;
case 8:
ascstr = "H";
break;
case 9:
ascstr = "I";
break;
case 10:
ascstr = "J";
break;
case 11:
ascstr = "K";
break;
case 12:
ascstr = "L";
break;
case 13:
ascstr = "M";
break;
case 14:
ascstr = "N";
break;
case 15:
ascstr = "O";
break;
case 16:
ascstr = "P";
break;
case 17:
ascstr = "Q";
break;
case 18:
ascstr = "R";
break;
case 19:
ascstr = "S";
break;
case 20:
ascstr = "Y";
break;
default:
ascstr = "U";
break;
}
return ascstr;
}
}
在UI的后台代码：
private void btnExport2_Click(object sender, RoutedEventArgs e)
{
try
{
//实例方法导出到Excel
ExportToExcel exportTool = new ExportToExcel();
exportTool.Export_to_Excel(this.dg, "MyExcel");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
测试验证导出成功，样式设置如上图。