DataTable dt = ExportExcel(Sql);//执行查询
StringWriter sw = new StringWriter();
//将datatable写入TextWriter中
DataTableToWriter(dt, sw);
string filePath = "TempFile//" + DateTime.Now.ToString("yyyyMMddhhmmss") + ".xls";
//创建Excel文件
File.Create(Server.MapPath("//" + filePath));StreamWriter fileWriter = new StreamWriter(Server.MapPath("//" + filePath),true,System.Text.Encoding.GetEncoding("GB2312"));
fileWriter.WriteLine(sw);
fileWriter.Close();
fileWriter.Dispose();
///将datatable写入TextWriter中
public void DataTableToWriter(DataTable dt, StringWriter w)
{
try
{
//读取表头
for (int i = 0; i < dt.Columns.Count; i++)
{
w.Write(dt.Columns[i]);
w.Write('\t');
}
w.Write("\r\n");
object[] values = new object[dt.Columns.Count];
//读取数据行
foreach (DataRow dr in dt.Rows)
{
values = dr.ItemArray;
for (int i = 0; i < dt.Columns.Count; i++)
{
w.Write(values[i]);
w.Write('\t');
}
w.Write("\r\n");
}
w.Flush();
w.Close();
}
catch
{
w.Close();
}
}
