我正尝试从我的C＃网络应用程序登录网站，直接从应用程序发送电子邮件，而不是让用户亲自访问网站。
注意：我尝试登录的网站每次加载页面时都会更改id的{{1}}，即使在同一会话期间也是如此。因此，我决定阅读页面来源，提取文本框的textboxes，然后在发布消息时使用id。
id应用程序到达此行时停止
public partial class sender : System.Web.UI.Page
{
string userID, userPwd, recepsID, msgText, loginResponseString, sessionCode, queryCode;
private HttpWebRequest initRequest, loginRequest, msgRequest;
private HttpWebResponse initResponse, loginResponse;
private Object lockObj = new Object();
protected void Page_Load(object sender, EventArgs e)
{
userID = Request.QueryString["userNumber"];
userPwd = Request.QueryString["userPwd"];
recepsID = Request.QueryString["receps"];
msgText = Request.QueryString["msgBody"];
if (userID != null && userPwd != null && recepsID != null & msgText != null)
doLoginAndSendMessage(userID, userPwd, recepsID, msgText);
else
Response.Write("Some values are missing");
}
public void doLoginAndSendMessage(string uid, string pwd, string recepIds, string msg)
{
try
{
doLogin(uid, pwd, recepIds, msg);
}
catch (Exception ex)
{
Response.Write("Sending Failed, Please Try Again");
}
}
public void doLogin(string strUserId, string strPassword, string strIds, string strMessage)
{
try
{
initRequest = (HttpWebRequest)WebRequest.Create("http://www.somewebsite.com/login.aspx");
initRequest.CookieContainer = new CookieContainer();
initRequest.Timeout = 60000;
StreamReader initSr = new StreamReader(initRequest.GetResponse().GetResponseStream(), System.Text.Encoding.GetEncoding("utf-8"));
initSr.ReadToEnd();
initSr.Close();
loginRequest = (HttpWebRequest)WebRequest.Create("http://www.somewebsite.com/login.aspx");
loginRequest.CookieContainer = new CookieContainer();
loginRequest.Timeout = 60000;
StringBuilder loginString = new StringBuilder();
loginString.Append("LoginUserId=" + strUserId + "&LoginPassword=" + strPassword + "&RememberMe=1&Login=Login");
byte[] loginData = Encoding.ASCII.GetBytes(loginString.ToString());
//to get any cookies from the initial response
initResponse = (HttpWebResponse)initRequest.GetResponse();
//setting cookies
loginRequest.CookieContainer.Add(initResponse.Cookies);
//Adding Headers
loginRequest.Method = "POST";
loginRequest.ContentType = "application/x-www-form-urlencoded";
loginRequest.ContentLength = loginData.Length;
Stream loginStream = loginRequest.GetRequestStream();
loginStream.Write(loginData, 0, loginData.Length);
loginStream.Close();
//Reading the response
StreamReader loginSr = new StreamReader(loginRequest.GetResponse().GetResponseStream(), System.Text.Encoding.GetEncoding("utf-8"));
loginResponseString = loginSr.ReadToEnd();
loginSr.Close();
if (loginResponseString.Contains("inbox.aspx"))
{
//get session code
sessionCode = loginResponseString.Substring(125, 5);
//call the sendmessage method
sendMessage(strIds, strMessage);
}
else
{
Response.Write("Login Failed: Check Username and password");
}
}
catch (Exception ex)
{
Response.Write("Sending Failed, Please Try Again");
}
}
public void sendMessage(string strIds, string strMsg)
{
try
{
string[] ids = strIds.Split(',');
for (int i = 0; i < ids.Length; i++)
{
msgRequest = (HttpWebRequest)WebRequest.Create("http://www.somewebsite.com/writenew.aspx?sessionid=" + sessionCode);
msgRequest.CookieContainer = new CookieContainer();
msgRequest.Timeout = 1000000;
msgRequest.ReadWriteTimeout = 1000000;
msgRequest.SendChunked = true;
//to get any cookies from the initial response
loginResponse = (HttpWebResponse)loginRequest.GetResponse();
//setting cookies
msgRequest.CookieContainer.Add(loginResponse.Cookies);
//Adding Headers
msgRequest.Method = "POST";
msgRequest.ContentType = "application/x-www-form-urlencoded";
Stream msgStream = msgRequest.GetRequestStream();
Stream respStream = msgRequest.GetResponse().GetResponseStream();
StreamReader codeRead = new StreamReader(respStream, System.Text.Encoding.GetEncoding("utf-8"));
string temp = codeRead.ReadToEnd();
codeRead.Close();
respStream.Close();
txtResponse.Text = temp;
try
{
int starInd = temp.IndexOf("UserId_");
//int endInd = starInd + 15;
string holder = temp.Substring(starInd, 15);
int startInd = holder.IndexOf("_") + 1;
queryCode = holder.Substring(startInd, 5);
txtSubString.Text = queryCode;
}
catch (Exception ex)
{
txtSubString.Text = "SOME ERROR";
}
lock (lockObj)
{
StringBuilder msgString = new StringBuilder();
msgString.Append("sessionid=" + queryCode + "&GlobalKeyId=1&MessageLength=988&ReceiveId_"
+ queryCode + "=" + ids[i] + "&Message_" + queryCode + "=" + strMsg
+ "&SendNow_" + queryCode + "=Send Now");
byte[] msgData = Encoding.ASCII.GetBytes(msgString.ToString());
msgStream.Write(msgData, 0, msgData.Length);
msgStream.Close();
}
//Reading the response
StreamReader msgSr = new StreamReader(respStream, System.Text.Encoding.GetEncoding("utf-8"));
string msgResponseString = msgSr.ReadToEnd();
msgSr.Close();
sessionCode = msgResponseString.Substring(123, 5);
}
Response.Write("Message Sent Successfully");
}
catch (Exception ex)
{
Response.Write("Sending Failed, Please Try Again<br/>" + ex.Message);
}
}
}
请帮我解决错误。谢谢
答案 0 :(得分：3)
当你致电GetResponse()时，它将导致发送到目前为止建立的请求，并且客户端将获取响应。
您需要在致电GetResponse()之前构建完整的请求，否则您的请求将无法完成。在调用GetResponse()之后获取请求流并写入POST数据将抛出此异常，以表明在已经发送请求之后继续构建请求是没有意义的。