How to display the string html contents into webbrowser control

Question

I have a c  win app program  I save the text with html format in my database but I want to show it in a webbrowser to my user How to display the string html contents into webbrowser control   thanks in advance

User · Answer

The DisplayHtml string html  recommended by m3z worked for me   In case it helps somebody  I would also like to mention that initially there were some spaces in my HTML that invalidated the HTML and so the text appeared as a string  The spaces were introduced  around the angular brackets  when I pasted the HTML into Visual Studio  So if your text is still appearing as text after you try the solutions mentioned in this post  then it may be worth checking that the HTML syntax is correct

User · Answer

Try this   webBrowser1 DocumentText         lt html gt  lt body gt Please enter your name  lt br  gt           lt input type  text  name  userName   gt  lt br  gt           lt a href  http   www microsoft com  gt continue lt  a gt           lt  body gt  lt  html gt

User · Answer

As commented by Thomas W  - I almost missed this comment but I had the same issues so it s worth rewriting as an answer I think   The main issue being that after the first assignment of webBrowser1 DocumentText to some html  subsequent assignments had no effect   The solution as linked by Thomas can be found in detail at http   weblogs asp net gunnarpeipman archive 2009 08 15 displaying-custom-html-in-webbrowser-control aspx however I will summarize below in case this page becomes unavailable in the future   In short  due to the way the webBrowser control works  you must navigate to a new page each time you wish to change the content  Therefore the author proposes a method to update the control as   private void DisplayHtml string html        webBrowser1 Navigate  about blank        if  webBrowser1 Document    null                webBrowser1 Document Write string Empty             webBrowser1 DocumentText   html      I have however found that in my current application I get a CastException from the line if webBrowser1 Document    null   I m not sure why this is  but I ve found that if I wrap the whole if block in a try catch the desired effect still works  See   private void DisplayHtml string html        webBrowser1 Navigate  about blank        try               if  webBrowser1 Document    null                        webBrowser1 Document Write string Empty                       catch  CastException e             do nothing with this     webBrowser1 DocumentText   html      So every time the function to DisplayHtml is executed I receive a CastException from the if statement  so the contents of the if statement are never reached  However if I comment out the if statement so as not to receive the CastException  then the browser control doesn t get updated  I suspect there is another side effect of the code behind the Document property which causes this effect despite the fact that it also throws an exception   Anyway I hope this helps people

User · Answer

webBrowser NavigateToString yourString

User · Answer

Here is a little code  It works  for me  at any subsequent html code change of the WebBrowser control  You may adapt it to your specific needs       static public void SetWebBrowserHtml WebBrowser Browser  string HtmlText                if  Browser    null                        if  string IsNullOrWhiteSpace HtmlText                                    Putting a div inside body forces control to use div instead of P  paragraph                     when the user presses the enter button                 HtmlText                               lt html gt                       lt head gt                       lt meta http-equiv   Content-Type   content   text html  charset UTF-8     gt                       lt  head gt                         lt div gt  lt  div gt                       lt body gt                       lt  body gt                       lt  html gt                               if  Browser Document    null                                Browser Navigate  about blank                       Wait for document to finish loading                 while  Browser ReadyState    WebBrowserReadyState Complete                                        Application DoEvents                        System Threading Thread Sleep 5                                                   Write html code             dynamic Doc   Browser Document DomDocument              Doc open                Doc write HtmlText               Doc close                     Add scripts here                               dynamic Doc   Document DomDocument              dynamic Script   Doc getElementById  MyScriptFunctions                if  Script    null                                Script   Doc createElement  script                    Script id    MyScriptFunctions                   Script text   JavascriptFunctionsSourcecode                  Doc appendChild Script                                                                   Enable contentEditable                                 if  Browser Document Body    null                                if  Browser Version Major  gt   9                      Browser Document Body SetAttribute  contentEditable    true                                                               Attach event handlers                Browser Document AttachEventHandler  onkeyup   BrowserKeyUp                  Browser Document AttachEventHandler  onkeypress   BrowserKeyPress                  etc

User · Answer

Simple solution  I ve tested is  webBrowser1 Refresh    var str     lt html gt  lt head gt  lt  head gt  lt body gt     sender ToString       lt  body gt  lt  html gt    webBrowser1 DocumentText   str

User · Answer

Instead of navigating to blank  you can do   webBrowser1 DocumentText  0   webBrowser1 Document OpenNew true   webBrowser1 Document Write theHTML   webBrowser1 Refresh      No need to wait for events or anything else  You can check the MSDN for OpenNew  while I have tested the initial DocumentText assignment in one of my projects and it works

User · Answer

Old question  but here s my go-to for this operation   If browser Document IsNot Nothing Then     browser Document OpenNew True      browser Document Write My Resources htmlTemplate  Else     browser DocumentText   My Resources htmlTemplate End If   And be sure that any browser Navigating event DOES NOT cancel  about blank  URLs   Example event below for full control of WebBrowser navigating   Private Sub browser Navigating sender As Object  e As WebBrowserNavigatingEventArgs  Handles browser Navigating      Try         Me Cursor   Cursors WaitCursor          Select Case e Url Scheme              Case Constants App Url Scheme                  Dim query As Specialized NameValueCollection   System Web HttpUtility ParseQueryString e Url Query                   Select Case e Url Host                      Case Constants Navigation URLs ToggleExpander Host                          Dim nodeID As String   query Item Constants Navigation URLs ToggleExpander Parameters NodeID                                                                                lt other operations here gt                                                                       End Select              Case Else                 e Cancel    e Url ToString    lt  gt   about blank            End Select      Catch ex As Exception         ExceptionBox Show ex   Operation failed        Finally         Me Cursor   Cursors Default     End Try  End Sub

User · Answer

For some reason the code supplied by m3z  with the DisplayHtml string  method  is not working in my case  except first time   I m always displaying html from string  Here is my version after the battle with the WebBrowser control   webBrowser1 Navigate  about blank    while  webBrowser1 Document    null    webBrowser1 Document Body    null      Application DoEvents    webBrowser1 Document OpenNew true  Write html     Working every time for me  I hope it helps someone

[c#] How to display the string html contents into webbrowser control?

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