How do you open an external file on a WebBrowser Control

**Rebeccardr** · May 26 '10, 10:15 AM

Originally posted by Rebeccardr

I have a problem where I am using the following code to open an external avi file.

I am outputting the code to external html file for debugging purposes and after I have set my security settings in internet explorer it is working fine.

However, when running through a webBrowser control it does nothing. Is there someway of setting the security settings on my webBrowser control or am I missing something completely.

Code I have is :

Code:

 public Form1()
        {
            InitializeComponent();
            MemoryStream HTMLMemory = new MemoryStream();
            StreamWriter HTMLWriter = new StreamWriter(HTMLMemory);
           
            HTMLWriter.Write("<html><body><input type=button onClick=\" window.location='file:///C:/RDR_Expert_Advisory/Anomaly_ID_surfaces_2010_v.avi'\" value=\"Open File\">");
          
            HTMLWriter.Flush();
            HTMLMemory.Position = 0;
            webBrowser1.DocumentStream = HTMLMemory;

            // Print code to a txt file
            StreamWriter sw = new StreamWriter("C:\\RDR_Expert_Advisory\\Test.htm");
            StreamReader sr = new StreamReader(HTMLMemory);
            sw.WriteLine(sr.ReadToEnd());
            sw.Close();
            HTMLMemory.Position = 0;
        }

Anyone know why I get a script error on this code?

"An error has occurred in the script on this page."
Line 1
Char 2
Error: Access is denied
Code 0
URL: about:blank

**nukefusion** · May 26 '10, 03:57 PM

Hi Rebeccardr,

Welcome to the forums.

I've only really used the WebBrowser control a couple of times and both times I remember it being quite painful. Trying to get JavaScript to work can be a nightmare.

Try something along these lines:

Code:

        public Form1()
        {
            InitializeComponent();
            MemoryStream HTMLMemory = new MemoryStream();
            StreamWriter HTMLWriter = new StreamWriter(HTMLMemory);
            HTMLWriter.Write("<html><body><input ID=\"myButton\" type=button value=\"Open File\">");

            HTMLWriter.Flush();
            HTMLMemory.Position = 0;
            webBrowser1.DocumentStream = HTMLMemory;
            while (webBrowser1.ReadyState != WebBrowserReadyState.Complete) Application.DoEvents();
            webBrowser1.Document.GetElementById("myButton").Click += element_Click;

            // Print code to a txt file 
            StreamWriter sw = new StreamWriter("C:\\RDR_Expert_Advisory\\Test.htm"); 
            StreamReader sr = new StreamReader(HTMLMemory);
            sw.WriteLine(sr.ReadToEnd());
            sw.Close();
            HTMLMemory.Position = 0;
        }

        private void element_Click(object sender, HtmlElementEventArgs e)
        {
            webBrowser1.Url = new Uri("file:///C:/RDR_Expert_Advisory/Anomaly_ID_surfaces_2010_v.avi");
        }

Hope it helps.

**Rebeccardr** · May 26 '10, 04:08 PM

That works! Thank you!!!

How do you open an external file on a WebBrowser Control

How do you open an external file on a WebBrowser Control

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