How to call the webbrowser control script in winform

This is a problem on the csdn forum. It may be helpful to other people, so I posted it.

JScript is built on com, and setting variables/calling functions is implemented through idispatch. In. net, the method in idispatch is called through reflection, that is, through system. type. invokemember. This method calls idispatch: getidsofnames and idispatch: invoke to call methods and attributes in the COM automation object. Reference

Binding for office automation servers with Visual C #. net

Suppose there are the following HTML,

<Script language = "JavaScript">
VaR var1 = 'yes ';
Function testx (OBJ)
{
Alert (OBJ );
Alert (var1 );
}
</SCRIPT>
<Input type = button value = "Click me" onclick = "testx ('hello');">

In C #, assume that axwebbrowser1 is your webbrowser control object. If you have loaded the preceding HTML, you can do this,

Mshtml. ihtmldocument2 Doc = (mshtml. ihtmldocument2) axwebbrowser1.document;
Mshtml. ihtmlwindow2 win = (mshtml. ihtmlwindow2) Doc. parentwindow;

// Read the variable value
Object o = win. GetType (). invokemember ("var1", bindingflags. getproperty, null, win, new object [] {});

// Write the variable value
Win. GetType (). invokemember ("var1", bindingflags. setproperty, null, win, new object [] {"New Value "});

// Call Method
Win. GetType (). invokemember ("testx", bindingflags. invokemethod, null, win, new object [] {1 });

It's troublesome, right? Fortunately, we don't need to worry so much, because ihtmlwindow2 has a ready-made method called execScript. We can do this:

Win.exe cscript ("var1 = 'abc';", "JavaScript ");
Win.exe cscript ("testx (12)", "JavaScript ");

Address: http://blog.joycode.com/saucer/archive/2004/10/16/35628.aspx