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Closed 8 years ago.
I want to call a JavaScript function through C#, using a WinForm's WebBrowser control. I've attempted to search however could not find anything which answers my question, only solutions which involved ASP.NET.
Thank you in advance.
Edit:
This is the only question regarding this that I've found that actually has an answer that demonstrates how to call a JavaScript method with parameters, and also shows how to call a .NET function from JavaScript in the WebBrowser control.
I do not think this question should be marked as a duplicate as it adds good value. It's the first hit on a google search for "c# webbrowser call javascript function with parameters".
This is a nice example, that I found here:
http://www.codeproject.com/Tips/127356/Calling-JavaScript-function-from-WinForms-and-vice
HTML/JavaScript
<html>
<head>
<script type="text/javascript">
function ShowMessage(message) {
alert(message);
}
function ShowWinFormsMessage() {
var msg = document.getElementById('txtMessage').value;
return window.external.ShowMessage(msg);
}
</script>
</head>
<body>
<input type="text" id="txtMessage" />
<input type="button" value="Show Message" onclick="ShowWinFormsMessage()" />
</body>
</html>
C#
public partial class frmMain : Form {
public frmMain() {
InitializeComponent();
webBrowser1.ObjectForScripting = new ScriptManager(this);
}
private void btnShowMessage_Click(object sender, EventArgs e) {
object[] o = new object[1];
o[0]=txtMessage.Text;
object result = this.webBrowser1.Document.InvokeScript("ShowMessage", o);
}
private void frmMain_Load(object sender, EventArgs e) {
this.webBrowser1.Navigate(@"E:\Projects\2010\WebBrowserJavaScriptExample\WebBrowserJavaScriptExample\TestPage.htm");
}
[ComVisible(true)]
public class ScriptManager {
frmMain _form;
public ScriptManager(frmMain form) {
_form = form;
}
public void ShowMessage(object obj) {
MessageBox.Show(obj.ToString());
}
}
}
