我在vs2010上调试时可以在D盘输出拼的.xml文件,  为啥部署到iis后便不起作用。代码如下,是iis设置上有啥机关吗     急。。

private void uploadmz_Click(HttpContext context)
{
string UploadTime = Convert.ToString(DateTime.Today).Substring(0,10);
UploadTime = UploadTime.Replace("-", "");

DataSet ds = new DataSet();
string sql = "exec usp_upload_mz";
using (SqlConnection sqlcon = new SqlConnection(ConfigurationManager.ConnectionStrings["COMET_0000ConnectionString"].ConnectionString))
{
SqlDataAdapter adatapter = new SqlDataAdapter();
adatapter.SelectCommand = new SqlCommand(sql, sqlcon);
adatapter.Fill(ds);
}
//ds.WriteXml(@"D:\" + UploadTime + ".xml",XmlWriteMode.IgnoreSchema);
try
{
FileStream fs = new FileStream(@"D:\upload\" + UploadTime + ".xml", FileMode.Create);
StreamWriter sw = new StreamWriter(fs);
//开始写入
foreach (DataRow dr in ds.Tables[0].Rows)
{
sw.Write(dr[0].ToString());
}
//清空缓冲区
sw.Flush();
//关闭流
sw.Close();
fs.Close();

}
catch(Exception e) {

System.Console.WriteLine(e.Message);
}

}