I know I can use GUID to generate a unique string, but it’s too long.
Now I only need generate un-duplicate string within an website, how can I do? Thanks!
Here is Solutions:
We have many solutions to this problem, But we recommend you to use the first solution because it is tested & true solution that will 100% work for you.
First of all you can start with a counter that you make sure using Mutex/lock that return unique incremental numbers, and you save the last number somewhere on your site, maybe in web.config, maybe in database, or in a file.
Then you convert this unique number to a different base number, eg to a base-64. Here is some code, and mode details on how you can do that
And you can get results like
value: 0 encoded: A value: 1 encoded: B value: 9999999999 encoded: SrYsNt value: 4294965286 encoded: ZNGEvT value: 2292964213 encoded: rHd24J value: 1000000000 encoded: TrNVzD
Now, if you scramble the map on the characters you can also make a not so easy to find number.
you can use a random number of sufficient length.. between lets say 10,000 and 99,999..
if that aint good enough for you, you could look into some hashing algorithms.. i think..
Note: Use and implement solution 1 because this method fully tested our system.
Thank you 🙂