Help with regular expression

Hi All,

I'm having trouble with regular expressions, can anyone please help.
I'm trying to convert a string into a regular expressions, but my expression is to broad and I need to narrow it down.

if I get a string "**" I'm converting it to a regular expresson as such:
var expressionList = new List<Regex>();

var myString = "**";

if (myString.IndexOf('*') >= 0)
    expressionList.Add(new Regex(myString.Replace("*.", ".*\\.").Replace("/*", "/.*")));

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the thing is this is far to broad how can I change the expression to validate to the following:


Must start with http or https followed by ://


Any number of char or numbers (no periods ".")


myString (


anything else
With these rules applied I think only the following will pass:

Is it possible to also allow to pass.

The following should not pass:

If it is possible please explain the expression.
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Regular Expressions

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