C#直接接收Post参数(用数据流)

private string PostInput(HttpContext context)
{
try
{
System.IO.Stream s = context.Request.InputStream;
int count = 0;
byte[] buffer = new byte[1024];
StringBuilder builder = new StringBuilder();
while ((count = s.Read(buffer, 0, 1024)) > 0)
{
builder.Append(Encoding.UTF8.GetString(buffer, 0, count));
}
s.Flush();
s.Close();
s.Dispose();
return builder.ToString();
}
catch (Exception ex)
{ throw ex; }
}