Question

怎么用C#把数据库中的数据导出到EXCEL

Answer 1

下面的函数作用，将DataTable导出到EXCEL文件：
private void DataTabletoExcel(System.Data.DataTable tmpDataTable,string strFileName)
{
if (tmpDataTable == null)
{
return;
}
int rowNum = tmpDataTable.Rows.Count;
int columnNum = tmpDataTable.Columns.Count;
int rowIndex = 1;
int columnIndex = 0;

Excel.Application xlApp = new Excel.ApplicationClass();

xlApp.DefaultFilePath = "";
xlApp.DisplayAlerts = true;
xlApp.SheetsInNewWorkbook = 1;

Excel.Workbook xlBook = xlApp.Workbooks.Add(true);

//将DataTable的列名导入Excel表第一行
foreach(DataColumn dc in tmpDataTable.Columns)
{
columnIndex ++;
xlApp.Cells[rowIndex,columnIndex] = dc.ColumnName;
}

//将DataTable中的数据导入Excel中
for(int i = 0;i<rowNum; i++)
{
rowIndex ++;
columnIndex = 0;
for (int j = 0;j<columnNum; j++)
{
columnIndex ++;
xlApp.Cells[rowIndex,columnIndex] = tmpDataTable.Rows[i][j].ToString();
}
}
xlBook.SaveCopyAs(strFileName + ".xls");
}