uniqueidentifier

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NSFileManager unique file names

I need a quick and easy way to store files with unique file names on iOS.I need to prefix the file with a string, and then append the generated unique identifier to the end.I was hoping NSFileManager[详细]

2023-04-13 01:02 分类：问答
iOS 5 - No more UDID - How to keep some critical datas to identifiy the user even if app is deleted

I\'ve just read on a blog that the UDID will not survive iOS 5. I us开发者_开发知识库e it as an identifier combined to an app ID I generate myself. Without that UDID, I will just have the App Identifi[详细]

2023-04-11 13:07 分类：问答
Generating a newsequentialid using Linq

I\'m inserting a record into a table where Id is of type uniqueidenfier. I would like that Id to be generated on SQL server, sort of like using newsequentialid.[详细]

2023-04-10 13:17 分类：问答
A Minor, but annoying niggle - Why does ASP.Net set SQL Server Guids to lowercase?

I\'m doing some client-side stuff with Javascript/JQuery with .Net controls which expose their GUID/UniqueIdentifier IDs on the front end to allow them to be manipulated. During debugging something is[详细]

2023-04-10 06:17 分类：问答
Convert iPhone unique identifier to integer

I have made a web service that gets an integer as a unique identifier for a Phone. Later, i realised that an iPhone UID is an NSstring in that format: 5DE31FA12-XXXXX-XXXXX-XXXXXXX. So i would like to[详细]

2023-04-09 09:48 分类：问答
How do I generate unique usernames on a shared database concurrently?

I need to generate account names automatically. They will be used in user software that will access my 开发者_如何学Pythonservice, so they are not necessarily pretty looking. I guess any alphanumeric[详细]

2023-04-08 22:59 分类：问答
EF 4.0 update uniqueidentifier

I am trying to update a colum with datatypeuniqueidenti开发者_JS百科fier using EF v4.0. I am getting an error Conversion failed when converting from a character string to uniqueidentifier.[详细]

2023-04-06 17:06 分类：问答
SQLite: How to set ID PK to start from zero instead of starting from 1?

Is it possible to set default starting value to zero instead of 1? Currently I\'m using FMDB but 开发者_运维问答wondering is it possible at all ...[详细]

2023-04-06 10:37 分类：问答
SQL Server 2008 uniqueidentifier vs. Binary performance

In a logging perspective with millions of rows. What is the preferred way? Do you store the Guid as a UniqueIdentifier or in Binary? Which is faster for searching?[详细]

2023-04-06 06:48 分类：问答
Performance issue with generation of random unique numbers

I have a situation where by I need to create tens of tho开发者_如何学运维usands of unique numbers. However these numbers must be 9 digits and cannot contain any 0\'s. My current approach is to generat[详细]

2023-04-05 04:59 分类：问答