selecting folders

the trick here is to use the input field of the type 'File'  in html and then call dynamically created javascript to fire a client callback.

       type="File" />

In C#, Implement

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

public partial class TestFilePicker : System.Web.UI.Page, ICallbackEventHandler

protected void Page_Load(object sender, EventArgs e)

// Get javascript function from the

// server that is capable of connecting

// to our server. ReceiveServerData is

// the javascript method we will call when

// we are done processing the data

string reference =

this.ClientScript.GetCallbackEventReference(

this, "arg", "ReceiveServerData", "");

// Generate the javascript that can connect

// to the server

string callBackScript =

@" function CallServer(arg, context)

{" + reference + ";}";

// Put the javascript on the page

this.ClientScript.RegisterClientScriptBlock(

this.GetType(), "CallServer",

callBackScript, true);

string callToServer =

@"

";

this.ClientScript.RegisterClientScriptBlock(

this.GetType(), "callToServer",

callToServer, true);

///

///

///A string that represents an event argument to pass to the event handler.

public void RaiseCallbackEvent(string eventArgument)

Session["path"] = eventArgument;

///

///

///

///The result of the callback.

///

///

public string GetCallbackResult()

string path = Session["path"] as string;

return path;

// throw new NotImplementedException();