I am using the webBrowser control in C# to load a webpage and need to call a JavaScript function that returns a string value. I got a solution to use the InvokeScript method, and I tried a lot, but everything has failed.
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2 Answers
Can you specify what failed?
My sample below consists of a form with a WebBrowser and a Button.
The object called y in the end has the sentence "i did it!". So with me it works.
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
webBrowser1.DocumentText = @"<html><head>
<script type='text/javascript'>
function doIt() {
alert('hello again');
return 'i did it!';
}
</script>
</head><body>hello!</body></html>";
}
private void button1_Click(object sender, EventArgs e)
{
object y = webBrowser1.Document.InvokeScript("doIt");
}
}
Comments
You can send arguments to the js function:
// don't forget this:
[PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
[ComVisible(true)]
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
webBrowser1.DocumentText = @"<html><head>
<script type='text/javascript'>
function doIt(myArg, arg2, arg3) {
alert('hello again ' + myArg);
return 'yes '+arg2+' - you did it! thanks to ' +myArg+ ' & ' +arg3;
}
</script>
</head><body>hello!</body></html>";
}
private void button1_Click(object sender, EventArgs e)
{
// get the retrieved object from js into object y
object y = webBrowser1.Document.InvokeScript("doIt", new string[] { "Snir", "Raki", "Gidon"});
}
}
