C # Webbrowser Common methods and multi-threaded calls

Set the value of a control

        /// <summary>        ///double judgment based on id,name and set values/// </summary>        /// <param name= "TagName" ></param>        /// <param name= "id" ></param>        /// <param name= "value" ></param>        Private voidSettxt (stringTagName,stringNamestringIdstringvalue) {HTMLDocument docx= <strong><font color="#FF0000">webBrowser</font></strong>1.            Document; foreach(HtmlElement iteminchdocx. getElementsByTagName (TagName)) {if(item. GetAttribute ("name") !=NULL&& item. GetAttribute ("name") = = Name | | Item. Id = =ID) {Try{item.                        Focus (); Item. SetAttribute ("value", value); }                    Catch{item. SetAttribute ("value", value); }                 }            }        }

Returns the contents of the picture </IMG> in the specified webbrowser to be referenced mshtml

/// <summary>///returns the picture in the specified WebBrowser</IMG>the contents of the diagram in/// </summary>/// <param name= "Webctl" >WebBrowser Controls</param>/// <param name= "Imgetag" >img Element</param>/// <returns>img Object</returns>PrivateImage getwebimage (WebBrowser webctl, HtmlElement imgetag) {HTMLDocument doc=(HTMLDocument) WebCtl.Document.DomDocument; HTMLBody Body=(HTMLBody) doc.body; Ihtmlcontrolrange rang=(Ihtmlcontrolrange) body.createcontrolrange (); IHTMLControlElement IMG= (ihtmlcontrolelement) imgetag.domelement;//Image AddressImage oldimage =Clipboard.getimage ();    Rang.add (IMG); Rang.execcommand ("Copy",false,NULL);//Copy to MemoryImage Numimage =Clipboard.getimage (); Try{clipboard.setimage (oldimage); }    Catch { }    returnnumimage;}

A general-purpose WebBrowser class that encapsulates common methods

 Public Partial classHtmlElement {//get elements by name         PublicHtmlElement Getelement_name (WebBrowser WB,stringName) {HtmlElement e=WB.            Document.all[name]; returne; }         //get elements by ID         PublicHtmlElement getelement_id (WebBrowser WB,stringID) {htmlelement e=WB.            document.getElementById (ID); returne; }         //get elements based on index         PublicHtmlElement Getelement_index (WebBrowser WB,intindex) {HtmlElement e=WB.            Document.all[index]; returne; }         //The type gets the meta and uses it without the name and ID         PublicHtmlElement Getelement_type (WebBrowser WB,stringtype) {HtmlElement e=NULL; HtmlElementCollection Elements= WB. document.getElementsByTagName ("input"); foreach(htmlelement elementinchelements) {                if(element. GetAttribute ("type") ==type) {e=element; }            }            returne; }        //The type gets the meta, is used without name and ID, and specifies the first of the homogeneous type, Getelement_type () upgrade version         PublicHtmlElement Getelement_type_no (WebBrowser WB,stringTypeinti) {intj =1; HtmlElement e=NULL; HtmlElementCollection Elements= WB. document.getElementsByTagName ("input"); foreach(htmlelement elementinchelements) {                if(element. GetAttribute ("type") ==type) {                    if(J = =i) {e=element; } J++; }            }            returne; }        //get form table sole name name, return form         PublicHtmlElement Getelement_form (WebBrowser WB,stringform_name) {HtmlElement e=WB.            Document.forms[form_name]; returne; }          //set the value of the element Value property         Public voidWrite_value (HtmlElement E,stringvalue) {E.setattribute ("value", value); }         //methods of executing elements, such as: Click,submit (requires form table sole name), etc.         Public voidBtn_click (HtmlElement E,strings) {e.invokemember (s); }    }

Multi-threaded execution of WebBrowser methods:
WebBrowser only supports STA mode

Private voidThreadwebbrowser (stringURL) {Thread tread=NewThread (NewParameterizedthreadstart (Begincatch)); Tread. Setapartmentstate (ApartmentState.STA);//note the thread unit that is createdtread. Start (URL);} Private voidBegincatch (Objectobj) {     stringURL =obj.     ToString (); WebBrowser WB=NewWebBrowser (); Wb. Scripterrorssuppressed=true; //Here navigate a blank page must beWb. Navigate ("About:blank"); stringHtmlcode ="";//this assigns the HTML string dataWB.     document.write (Htmlcode); //perform other actions｝

C # Webbrowser Common methods and multi-threaded calls