identity

问题 I am interested in what is the most performant way for StoreGeneratedPattern. In past I was used to let the DB generate the ID for me but I was wondering if there is any advantage in setting StoreGeneratedPattern = None instead of StoreGeneratedPattern = Identity I am not even sure what happens when I set it to Calculated. Any recommendations? Is there any nice article related to this because msdn is not very explanatory. I am using mostly ints with few GUIDs in my schema. 回答1: Check my blog

问题 We're developing a custom identity Provider(STS) to authenticate our applications. In this project we're using the Azure Acesses Control Services 2.0 and our Identity provider is a wsfederation. So, when starting the project, the azure ACS has had a url parameter called wctx, this parameter served to pass anything, and the ACS keeping the parameter when de ACS redirect to Identity provider, however now the parameter's value is encrypted when the login page is open, so we can't read. I'd like

问题 We're developing a custom identity Provider(STS) to authenticate our applications. In this project we're using the Azure Acesses Control Services 2.0 and our Identity provider is a wsfederation. So, when starting the project, the azure ACS has had a url parameter called wctx, this parameter served to pass anything, and the ACS keeping the parameter when de ACS redirect to Identity provider, however now the parameter's value is encrypted when the login page is open, so we can't read. I'd like

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Understanding NSString comparison in Objective-C Was just reading up about equality vs identity and I realized that I've been using some equal signs when comparing strings in my objc code. The weird thing is that it actually works from times to times and I was wondering why. http://www.karlkraft.com/index.php/2008/01/07/equality-vs-identity/ I have two pieces of code, one work and one doesn't. WORKING. Here I

问题 There have been numerous questions posed on this site relating to the retrieval of the IDENTITY after an insert is performed. The way we have been getting the identity is to make the call below, immediately after calling SaveChanges(); context.MyClass.OrderByDescending(c => c.Id).FirstOrDefault(); This seems to work consistently may be completely adequate; however, it has the appearence of opening up a potential for error, should another record be added in between the calls. So the first

问题 I'm trying to code a user defined function under SQL Server 2005 that will increase integer part of alphanumeric value by one. For example, uf_AlphanumericIncrease ('A000299') should return 'A000300'. Here's what I've done so far; ALTER FUNCTION uf_AlphaNumericIncrement ( @ID varchar(10) ) RETURNS VARCHAR(10) AS BEGIN DECLARE @RES varchar(10); IF SUBSTRING(@ID,LEN(@ID),1)='9' SET @RES=SUBSTRING(@ID,1,LEN(@ID)-2)+CAST (CAST(SUBSTRING(@ID,LEN(@ID)-1,1) AS smallint)+1 AS VARCHAR(10))+'0'; ELSE

问题 If I had a poll on my site, and I didn't want to require a registration to vote, but I only wanted each visit one, how might I do this? Let's say a visitor from IP 123.34.243.57 visits the site and votes. Would it then be safe to disallow anyone from 123.34.243.* from voting? Is this a good strategy? What's another one? 回答1: This is a fundamental challenge with all voting sites on the Internet, and you're just breaking the surface of the problem. The way you've phrased it, you "only want to

问题 I need to be able to determine the order which rows have been inserted into a table (there are no updates). Can I use an identity column to do this? I know that there may be gaps, but are the values guaranteed to be increasing by insertion order? 回答1: Largely yes, as long as you don't ever reset it or insert rows with bulk copy, or use IDENTITY_INSERT. And of course assuming that you don't overflow the data-type (which could be impressive). 回答2: Yes. Any gaps caused by deletions will not be

问题 I have a table called 'Workspaces' where the columns 'AreaID' and 'SurfaceID' work as a composite primary key. The AreaID references to another table called 'Areas' which only has AreaID as the primary key. What I want to do now is to make the surfaceID recound from 1 on every new AreaID. Right now I'm using the following code for the tables 'Areas' and 'Workspaces': --Table 'Areas' CREATE TABLE Areas ( AreaID INT IDENTITY(1,1) PRIMARY KEY, Areaname VARCHAR(60) UNIQUE NOT NULL ) --Table

问题 I am working on a ASP.NET 4.5 Web Application which uses ASP.NET Identity model for authentication and authorization. This web application also hosts a WCF Service and at the same time consumes it. There is another WPF-based application which will use this hosted WCF Service hosted (along with web application as a client itself). I want to authorize and authenticate each WCF Service request (coming either from Web Application Client or WPF Client). In ideal scenario, I would like to use same