winform + CefSharp achieve interaction and js

1: Adding a form when loaded
webBrowser.RegisterJsObject ( "getUserName", new new _Event ());
2: Register C # method js method
///

/// Click Login obtain a user name
///

public class _Event
{
public string getName(string userName)
{
MessageBox.Show(userName);
return userName;
}
}
3：js调用

    $(function () {
        $("#btnSubmit").click(function () {
            var uName= $("#txtName").val();
            var a = getuserName.getName(uName);
            alert(a);
        });
    });