Request.Querystring.Set

[Octopus]

Hello,

When I try to use the Request.Querystring.Set method, I get the error:

: Collection is read-only.

Is this not the method to use to set a key/value pair in the collection from within the code?

Thanks in advance,
Octopus

 

[Derek Stone]

The QueryString collection is read-only. Youll have to copy each element to a new NameValueCollection if you wish to modify anything.

 

[Octopus]

Thanks.
But why then do we have the Set method on the QueryString?
Just Curious...

 

[Derek Stone]

When the protected property IsReadOnly is set to true it would be impossible to simply remove the Set method. In other words, a methods visibility can not depend on the value of a property, nor any other factor. The method will always be visible.

Under most cases IsReadOnly is set to false, and the collection can be modified using Set(). However, in a unique case such as this, Microsoft deemed it necessary to disallow modifications to the collection, since that would lead to confusion as to what function those modifications would serve.

 

[Octopus]

I see. Thanks again!