WebClient表单提交

1 get方式获取网页

public string Get(string Url, string Referer, Encoding Encoder, ref string CookieStr)    
        {    
            string result = "";    
                 
            WebClient myClient = new WebClient();    
            myClient.Headers.Add("Accept: */*");    
            myClient.Headers.Add("User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; .NET4.0E; .NET4.0C; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; SE 2.X MetaSr 1.0)");    
            myClient.Headers.Add("Accept-Language: zh-cn");    
            myClient.Headers.Add("Content-Type: multipart/form-data");    
            myClient.Headers.Add("Accept-Encoding: gzip, deflate");    
            myClient.Headers.Add("Cache-Control: no-cache");    
            if (CookieStr != "")    
            {    
                myClient.Headers.Add(CookieStr);    
            }    
            myClient.Encoding = Encoder;    
            result = myClient.DownloadString(Url);    
            if (CookieStr == "")    
            {    
                var Cookie = myClient.ResponseHeaders["Set-Cookie"];    
                if (Cookie != null)    
                {    
                    CookieStr = GetCookie(Cookie);    
                    result += CookieStr;    
                }    
            }    
            return result;    

2 Post 提交表单

public string PostNormal(string Url, string Referer, Encoding Encoder, ref string CookieStr, string Data)    
       {    
           string result = "";    
              
           WebClient myClient = new WebClient();    
           myClient.Headers.Add("Accept: */*");    
           myClient.Headers.Add("User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; .NET4.0E; .NET4.0C; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; SE 2.X MetaSr 1.0)");    
           myClient.Headers.Add("Accept-Language: zh-cn");    
           myClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");  //普通上传类型    
           myClient.Headers.Add("Accept-Encoding: gzip, deflate");    
           myClient.Headers.Add("Cache-Control: no-cache");    
           if (CookieStr != "")    
           {    
               myClient.Headers.Add(CookieStr);    
           }    
           myClient.Encoding = Encoder;    
           byte[] buffer = myClient.UploadData(Url, "POST", Encoder.GetBytes(Data));    
           result = Encoder.GetString(buffer);    
              
              
           //if (CookieStr == "")    
           //{    
           //    CookieStr = myClient.ResponseHeaders["Set-Cookie"].ToString();    
           //    CookieStr = GetCookie(CookieStr);    
           //}    
           return result;    
       }

3  以byte流方式提交数据

public string PostData(string Url, string Referer, byte[] Data)    
{    
    string result = "";    
            
    WebClient myClient = new WebClient();    
    myClient.Headers.Add("Accept: */*");    
    myClient.Headers.Add("User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; .NET4.0E; .NET4.0C; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; SE 2.X MetaSr 1.0)");    
    myClient.Headers.Add("Accept-Language: zh-cn");    
    myClient.Headers.Add("Content-Type: multipart/form-data");  //分段 上传文件的类型    
    //myClient.Headers.Add("Content-Type: application/x-www-form-urlencoded");  //上传文件的类型    
    myClient.Headers.Add("Accept-Encoding: gzip, deflate");    
    myClient.Headers.Add("Cache-Control: no-cache");    
            
    byte[] buffer = myClient.UploadData(Url, Data);    
    result = Encoding.UTF8.GetString(buffer);    
            
    return result;    
}

4 上传文件

public string PostFile(string Url, string filePath, string fileName)    
       {    
           string result = "";    
           
           WebClient myClient = new WebClient();    
           myClient.Headers.Add("Accept: */*");    
           myClient.Headers.Add("User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; .NET4.0E; .NET4.0C; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; SE 2.X MetaSr 1.0)");    
           myClient.Headers.Add("Accept-Language: zh-cn");    
           myClient.Headers.Add("Content-Type: application/x-www-form-urlencoded");  //上传文件的类型    
           myClient.Headers.Add("Accept-Encoding: gzip, deflate");    
           myClient.Headers.Add("Cache-Control: no-cache");    
           
           byte[] buffer = myClient.UploadFile(Url,"POST", filePath);    
           result = Encoding.UTF8.GetString(buffer);    
           
           myClient.Dispose();    
           return result;    
                      
       }