如何在c#中post参数给一个php页面
我有一个OA系统(net开发)，和一个bbs（php）系统，我想实现登录OA后，点一个链接直接进入bbs，bbs就不需登录了，这就需要通过C＃把用户名和密码传到bbs首页上，，现在我实现了能打开论坛首页，可是路径却是本地的，哪位高手指点。代码如下：
    WebClient   myWebClient   =   new   WebClient();    
string   strUrl   =   "http://bbs.handinfo.cn/login.php ";
string   postData   =   "username=ally&password=12345&login=登录 ";
byte[]   byteArray;    
byte[]   responseArray;    
WebHeaderCollection   myWebHeaderCollection;    
   
myWebClient.Headers.Add( "Content-Type ", "application/x-www-form-urlencoded ");    
myWebClient.Headers.Add( "Accept-Language ", "zh-cn ");    
myWebHeaderCollection   =   myWebClient.Headers;    
       

byteArray   =   Encoding.ASCII.GetBytes(postData);      
try
{
responseArray   =   myWebClient.UploadData(strUrl, "POST ",byteArray);    

//接收正文信息;    
//Response.Write(Encoding.Default.GetString(responseArray));
                                //Response.Write(Encoding.GetEncoding( "GB2312 ").GetString(responseArray));
                                //string   str   =   System.Text.Encoding.GetEncoding( "gb2312 ").GetString(b);
                              //   Response.Write(Encoding.UTF8.GetString(responseArray));

                                System.IO.Stream   writer   =   req.GetRequestStream();//获得请求流          
                                writer.Write(Encoding.UTF8.GetString(responseArray,   0,   Encoding.UTF8.GetString(responseArray.Length));//将请求参数写入流      
                                writer.Close();//关闭请求流      
}
catch(Exception   ex)
{
throw   new   Exception( "出错： "+ex.Message);
}


------解决方案--------------------
<script language= "javascript " type= "text/javascript ">
var chinaweb = "http://bbs.php.com ";
function Connect()
{
try
{
var action = chinaweb;
var formQuery = document.createElement( " <form action= ' "+action+ " ' method= 'post ' target= '_blank '> </form> ");
var inputHidden = document.createElement( " <input type= 'hidden ' name= 'username '> ");
inputHidden.value = 'username ';
var inputPwd = document.createElement( " <input type= 'hidden ' name= 'password '> ");
inputPwd .value = 'pwd ';
formQuery.appendChild(inputPwd );
document.body.appendChild(