ASP .net 3.5 multi file upload

I have a requirment where the client needs to upload multiple files. The requirement is in such a way that when client selects th browse button a popup similar to windows explorer should come with some check boxe, where the client will be able to select multiple files and once he selects them a and clicks the upload button, the selected files need to be uploaded to the server.I have googled and gone through options of using jQuery/javascript to do the same, 开发者_开发知识库but was thinking whether it is possible to build a custom control for this requirement. May I knwo if there will be any limitations for this requirment in ASP .net 3.5?

And all th samples that I have gone through google does not allow user to select multiple files using a kind of windows explorer view(tree view with a check box for files). The examples are in such a way that the user selects one file at a time and then selects other files in a sequence and then uploads all of them.

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Have you tried: http://www.uploadify.com