导出excel函数代码C#

public static void ExportToExcel(DataTable dt, string fileName)
{
//在做这些前，将Excl添加到引用中来！！
Excel.Application excel = new Excel.Application();
//如果系统是Excl2007，添加的引用会不一样，代码如下。
//Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
if (excel == null)
{

}
else
{
Excel.Workbook xlBook = excel.Workbooks.Add(true);
Excel.Worksheet xlSheet = (Excel.Worksheet)xlBook.Worksheets[1];
//excel.Application.Workbooks.Add(true);
int cols = dt.Columns.Count;
int rows = dt.Rows.Count;
//列
for (int k = 0; k < cols; k++)
{
excel.Cells[1, k + 1] = dt.Columns[k].ColumnName;
}
//数据
for (int i = 0; i < rows - 1; i++)
{
for (int j = 0; j < cols; j++)
{

excel.Cells[i + 2, j + 1] = dt.Rows[i][j].ToString();
}
}

try
{
xlBook.Saved = true;
xlBook.SaveCopyAs(fileName);
}
catch
{

}

}
}

http://files.cnblogs.com/wangdetian168/Interop.Excel.rar