parameter deliver issue among web pages

I found that when you capture parameter value delivered from other pages, the "+" sign in the parameter value will be replaced wit开发者_开发知识库h space. I'm not sure if there is other signs to be replaced. So my question is, besides using string.replace() method, any other way to avoid such value changing?

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You may use url encoding to encode protected characters in your URL.

See: rfc3986 for reserved characters and not reserved characters. Nearly every language has its URL encoding implementation.

For example the Character + is reserved and will be replaced by %2B

Another reference can be found here.