黑马程序员_WinForm导出DataSet到Excel中

/// <summary>
/// 导出DataSet到Excel(如果DataSet中有多个DataTable,则会导出到不同的sheet中,但只生成一个excel文件)
/// </summary>
/// <param name="ds">数据集</param>
/// <param name="fileName">D:\\test.xlsx</param>
static void ExportToExcel(DataSet ds, string fileName)
{
//添加引用-->COM-->Microsoft Excel 12.0 Object Library

//Excel程序
Microsoft.Office.Interop.Excel.Application excelApplication = new Microsoft.Office.Interop.Excel.Application();
excelApplication.DisplayAlerts = false;
//工作薄
Workbook workBook = excelApplication.Workbooks.Add(Missing.Value);
//上一个工作薄
Worksheet lastWorkSheet = (Worksheet)workBook.Worksheets.get_Item(workBook.Worksheets.Count);
//空白工作薄
Worksheet newSheet = null;
int i = 0;
foreach (System.Data.DataTable dt in ds.Tables)
{
newSheet = (Worksheet)workBook.Worksheets.Add(Type.Missing, lastWorkSheet, Type.Missing, Type.Missing);
newSheet.Name = dt.TableName+i.ToString();
i++;
for (int col = 0; col < dt.Columns.Count; col++)
{
newSheet.Cells[1, col + 1] = dt.Columns[col].ColumnName;
}
for (int row = 0; row < dt.Rows.Count; row++)
{
for (int col = 0; col < dt.Columns.Count; col++)
{
newSheet.Cells[row + 2, col + 1] = (dt.Rows[row][col] == null ? "" : dt.Rows[row][col].ToString());
}
}
}

try
{
//删除默认的3个sheet
((Worksheet)workBook.Worksheets.get_Item(1)).Delete();
((Worksheet)workBook.Worksheets.get_Item(1)).Delete();
((Worksheet)workBook.Worksheets.get_Item(1)).Delete();

workBook.Close(true, fileName, Missing.Value);
return;
}
catch (Exception e)
{
throw e;
}
finally
{
excelApplication.Quit();
}
}