Query strings is a method to pass values from one page to another. In this blog, you'll learn:. A query string is one of the techniques in Web applications to send data from one webform to another through the URL. There is a limit on the Query string length. Hence, Query strings cannot be used to send very long data. Query strings are visible to the user, hence should not be used to send sensitive information suck as a username and password, unless encrypted.
Then select ASP. Provide the project a name and specify the location. Click OK to create the project. Using any overload with "routeValues" will generate a new routing URL and strip any querystring parameters. In my case, I wanted to add the enctype attribute and the only overload requires routeValues to be specified.
I suppose it's an oversight in MVC 3. However, you can still write your own form tag the old-fashioned way. Looking at the source code for MVC 3, it appears that the base overload for Html. BeginForm uses Request. I encountered this problem myself and had some difficulty identifying the most optimal solution, so I thought I'd add my brief experience to the conversation.
The reason for this seems to be that I had clicked on an Html. ActionLink from the page that owned that QueryString value, and that pushed me to an MVC ActionResult handler -- which is technically treated as a separate page with its own newly defined HttpContext , even though it doesn't represent as such on the URL in the browser while you're debugging.
Further research seems to suggest that Microsoft's preferred solution to this issue is to just pass your value down the chain when you call the handler In lieu of that, parsing your value from the UrlReferrer seems to work just fine, even if it takes one or two extra lines of code to reach your value.
For example, the most basic case scenario with a single value passed on the QueryString could look something like this:. I had a similar problem as novice Asp. Net MVC developer. The problem was a login form which was posting the form to its specific controller. So missing query string values are very normal. The solution which I applied is to add a hidden field to my form with value from the query string.
This needs to be added as parameter to the ActionResult or the model. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Why Request. Ask Question. Asked 11 years, 11 months ago. Active 3 years, 6 months ago. Microsoft makes no warranties, express or implied, with respect to the information provided here.
The following code example shows two ways to get the value of a query string variable named "fullname". The first line of code looks for the key "fullname" only in the query string; the second line looks for the key "fullname" in all of the HTTP request collections.
For more information about the second line, see Item[]. Skip to main content. This browser is no longer supported.
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