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Asked: 2026-05-21T03:11:37+00:00

I am writing a class library to perform operations on a site outside my

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I am writing a class library to perform operations on a site outside my control.
The site is accepting form-posts as input.

Can anyone tell me if there is a difference between these two methods except the form of the data to upload?

    System.Net.WebClient.UploadData(Uri, Byte[]);

    System.Net.WebClient.UploadValues(String, NameValueCollection);

I have no objections to arrange data either way, but started to wonder what the difference actually is, and it is still nagging me in some strange way, not knowing if there is a difference.

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1 Answer

  1. Editorial Team

    Both “POST” the data to the server. If you use UploadValues, the values will be made available to the server in the Request.Form collection which is how a normal HTML form works. UploadData gives you more flexibility since no escaping is performed on your data. Its up to you to format the data in a way that the server will understand. As a consequence of this, you can use UploadData to duplicate the behavior of UploadValues.

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