I recently encountered a problem where a value was null if accessed with Request.Form but fine if retrieved with Request.Params. What are the differences between these methods that could cause this?
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Request.Form only includes variables posted through a form, while Request.Params includes both posted form variables and get variables specified as URL parameters.
Brandon Wood
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How much no of key are default in Request.Params.Keys are 54 or much of them. Just FYI. – shalin gajjar Apr 05 '14 at 09:01
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Request.Params contains a combination of QueryString, Form, Cookies and ServerVariables (added in that order).
The difference is that if you have a form variable called "key1" that is in both the QueryString and Form then Request.Params["key1"] will return the QueryString value and Request.Params.GetValues("key1") will return an array of [querystring-value, form-value].
If there are multiple form values or cookies with the same key then those values will be added to the array returned by GetValues (ie. GetValues will not return a jagged array)
Richard Szalay
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i had a same problem but your answer help me a lot. i have an another question whether we can pass query string-vale and Form-value in single request. is it practically possible? – Kumaran T Aug 03 '11 at 12:05
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The reason was that the value I was retrieving was from a form element, but the submit was done through a link + JQuery, not through a form button submit.
Matt Mitchell
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