What does this represent in regularexpession validator control

[cmrhema]

Hi
while debugging a code i found a Regular expression validator control having a property as below
ValidationExpression="[\w\ .-]*"

Can any one please let me know what does this stand for.

I am using C# and asp.net.

regards
cmrhema

[r035198x]

Hi
while debugging a code i found a Regular expression validator control having a property as below
ValidationExpression="[\w\ .-]*"

Can any one please let me know what does this stand for.

I am using C# and asp.net.

regards
cmrhema

Is that a space between \ and . or was that added by the forum software?
If there is no space then that should match any words (letters and digits) which are allowed to start with and contain a dot (.) or a hyphen(-). No input is also matched.

[cmrhema]

Is that a space between \ and . or was that added by the forum software?
If there is no space then that should match any words (letters and digits) which are allowed to start with and contain a dot (.) or a hyphen(-). No input is also matched.

Many thanks for the reply

There was a space betweeen the \ and .
In another expression it was as below
ValidationExpression="[\w\-]*"

Can you please be more precise

[r035198x]

...

Can you please be more precise

The [] surround a character class. The * says zero or more times.
So []* says whatever is in the [] can repeat itself zero or more times.
Now coming to what's in the [] , the \w\ represents a word (combination of characters and digits) and the - since it appears at the end represents itself rather than specifies a range (as it would do in a-e).

[cmrhema]

The [] surround a character class. The * says zero or more times.
So []* says whatever is in the [] can repeat itself zero or more times.
Now coming to what's in the [] , the \w\ represents a word (combination of characters and digits) and the - since it appears at the end represents itself rather than specifies a range (as it would do in a-e).

many many thanks for the answer

[TRScheel]

many many thanks for the answer

I personally hate regular expressions so I use this