How do I add a local script file to the HTML of a WebBrowser control?

问题:

This seems really dumb. I've tried a bunch of different ways and it's just not working. I have a WinForms app with a WebBrowser control. If I try with a raw html file on my desktop using the same src string, the src I put together works fine. But plugging the same stuff into the WebBrowser control won't work.

Here's my code:

HtmlElementCollection head = this.wbPreview.Document.GetElementsByTagName( "head" ); if (head != null) {     HtmlElement elm = this.webBrowserControl.Document.CreateElement("script");     string mySource = Environment.CurrentDirectory + @"\MyScriptFile.js";     elm.SetAttribute("src", mySource);     elm.SetAttribute("type", "text/javascript");     ((HtmlElement)head[0]).AppendChild(elm); } 

The WebBrowser doesn't get the script. However, if I change "mySource" to an external resource (via http://), it works fine!

Help!

回答1:

i came up on your post, while playing around with things following worked for me:

HtmlElementCollection head = webBrowser1.Document.GetElementsByTagName("head"); if (head != null) {     HtmlElement elm = webBrowser1.Document.CreateElement("script");     elm.SetAttribute("type", "text/javascript");     elm.InnerText = System.IO.File.ReadAllText(Environment.CurrentDirectory + @"\helperscripts.js");     ((HtmlElement)head[0]).AppendChild(elm); } 

, so all methods of helperscript.js can be invoked using

webBrowser1.Document.InvokeScript("methodname"); 

, here as a reference for the script invoke: How to inject Javascript in WebBrowser control?

greetings

回答2:

Try adding file:// to the URL.

回答3:

There is a long story about workarounds of that "security fix" from MS. New behavior was implemented starting from IE7. Take a look into "base" tag and IE Feature controls.

I did the following:

                    //TODO: if not mono                 var executableFilename = Path.GetFileName(System.Reflection.Assembly.GetEntryAssembly().Location);                 var keys = new[] { executableFilename, [vsname]+".vshost.exe" }; //check!                  Action SetRegistryKeyOrFail =                     (key, val, regStr) =>                         {                             var reg =                                 Registry.CurrentUser.CreateSubKey(regStr);                             if (reg == null) throw new Exception("Failed registry: " + regStr);                             reg.SetValue(key, val);                         };                  foreach (var key in keys)                 {                     SetRegistryKeyOrFail(key, 1, @"SOFTWARE\Microsoft\Internet Explorer\MAIN\FeatureControl\FEATURE_BLOCK_LMZ_IMG");                     SetRegistryKeyOrFail(key, 0, @"SOFTWARE\Microsoft\Internet Explorer\MAIN\FeatureControl\FEATURE_BLOCK_LMZ_SCRIPT");                 } 

回答4:

This is because of security reasons. You need a webserver to do that, else you can access any file on a system which would be a big security hole.

In developement mode, you can set e.g on chrome:

chrome.exe --allow-file-access-from-files   

And you will be able to run your code.

文章来源: How do I add a local script file to the HTML of a WebBrowser control?