How to I return a value of method after webbrowser load complited

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I want make a class whit method wich used for read a string from a web page and return method but I cant write this.:-(

foe example:

webparsing reader=new webparsing();
string a=reader.read();

C#

<pre>namespace WindowsFormsApplication6
{
    class webparsing
    {

        private System.Windows.Forms.WebBrowser webBrowser1;
        private void initial()
        {
            this.webBrowser1 = new System.Windows.Forms.WebBrowser();
            webBrowser1.DocumentCompleted += new System.Windows.Forms.WebBrowserDocumentCompletedEventHandler(webBrowser1_DocumentCompleted);
            webBrowser1.Navigate("http:\\google.com");
        }

        private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            //do any
        }

        public string read()
        {
            initial();
            
            return webBrowser1.Document.GetElementById("lst-ib").InnerText;
        }

What I have tried:

I wand read a text from a text box and return but don't wait for web page complete.how to write this code?

Posted 8-Nov-17 22:27pm

mosifallah

Updated 9-Nov-17 21:55pm

v2

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Comments

Karthik_Mahalingam 9-Nov-17 8:35am

check this c# - How can I navigate webbrowser synchronously? - Stack Overflow[^]

mosifallah 10-Nov-17 3:55am

oh tanks it is very good ....thanks thanks

Karthik_Mahalingam 10-Nov-17 4:00am

welcome

2 solutions

Solution 1

When the load completes, you get the DocumentCompleted event - or you would if that code compiled, which it won't. You get a "Unrecognized escape sequence" error from the compiler, so no executable is generated. Start by changing it to this:

webBrowser1.Navigate("listname.html");

and see if that helps - it probably won't, unless your file is in the executable directory, but that's your problem, not mine! :laugh:

So even when you fix that, and it finds the file, the load won't happen instantaneously: you need to get your element in the handler, not an unrelated method.
In the handler, you can set the textbox using the SetAttribute method:

HtmlDocument doc = webBrowser1.Document;
doc.GetElementById("myId").SetAttribute("Value", "Text I want in the text box");

Posted 8-Nov-17 22:48pm

OriginalGriff

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mosifallah · Accepted Answer · 2017-11-09T21:55:00

it is answer thank a lot of

Karthik Bangalore

  bool IsReady;
 void Go()
 {
     IsReady = false;
     brw.Navigate("url");
     do
     {
         Thread.Sleep(10);
         Application.DoEvents();
     } while (!IsReady);
 }

void brw_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
 {
     IsReady = true;
 }