Passing array of strings from JS to C# inside WebBrowser control

Question

I'm using ObjectForScripting property to interact with web page inside WebBrowser control and everything works fine except I can't figure out how to pass array of strings back to C#

HTML code

<input type="submit" onclick="window.external.save(Array('test', 'test2'))" />

Form

// Returns System.__ComObject
public void Save(object parameters)
{
}

// Throws an exception
public void Save(object[] parameters)
{
}

// Also throws an exception
public void Save(string[] parameters)
{
}

Answer 1

Rather than fight it; maybe approach the problem from another angle... could you (instead, either of):

• delimit the data (with Array.join) and pass a single string, and split it (string.Split) in the C#
• call Save multiple times, accepting a single string each time (Save(string s)), then call a final method to actually commit the changes

Answer 2

You can use an anonymous object instead of an array on the javascript side:

<input type="submit" onclick="window.external.save({first: 'test', second: 'test2'})" />

On the C# side (you need to use .NET 4.0 or more for the dynamic or use Type.InvokeMember if you are on an older version):

public void Save(dynamic parameters)
{
  MessageBox.Show(parameters.first);
  MessageBox.Show(parameters.second); 
}

Not tested, but I think you can use reflection to discover the members.

Also look at this: http://dotnetacademy.blogspot.fr/2009/11/vbnetcnet-communication-with-javascript.html