Skip to main content

How can you handle concurrency at field level in LINQ to SQL?

How can you handle concurrency at field level in LINQ to SQL?
Ans. In LINQ to SQL, you can also handle concurrency at field level and this is the best way provided by the
LINQ. To achieve this you need to define UpdateCheck attribute at field level and it has the following options:
1. Never: - This option will never check for concurrency conflicts.
2. Always: - This option will always check for concurrency conflicts.
3. WhenChanged: - This option will check for concurrency conflicts when the field’s value has been changed.
[Column( DbType = "nvarchar(50)" , UpdateCheck = UpdateCheck.Never)]
public string CustomerID
{
set{CustomerID = value;}
get{return _CustomerID;}
}
Labels:

Comments

Post a Comment

Popular posts from this blog

Top 10 ASP.NET Web API Interview Questions

What is ASP.NET Web API? ASP.NET Web API is a framework that simplifies building HTTP services for broader range of clients (including browsers as well as mobile devices) on top of .NET Framework. Using ASP.NET Web API, we can create non-SOAP based services like plain XML or JSON strings, etc. with many other advantages including: Create resource-oriented services using the full features of HTTP Exposing services to a variety of clients easily like browsers or mobile devices, etc. What are the Advantages of Using ASP.NET Web API? Using ASP.NET Web API has a number of advantages, but core of the advantages are: It works the HTTP way using standard HTTP verbs like  GET ,  POST ,  PUT ,  DELETE , etc. for all CRUD operations Complete support for routing Response generated in JSON or XML format using  MediaTypeFormatter It has the ability to be hosted in IIS as well as self-host outside of IIS Supports Model binding and Validation Support for OD...
2 comments
Read more

First, FirstOrDefault, Single, SingleOrDefault In C#

For people who are new to LINQ, it is difficult to understand the difference between First, FirstOrDefault, Single, SingleOrDefault. In this blog, I will explain what to use and when.     I will take a simple example to make you understand practically how these methods work.   Consider a class Employee with properties as Id, Name, and Department. class  Employee {    public   int  Id {  get ;  set ; }    public   string  Name {  get ;  set ; }    public   string  Department{  get ;  set ; } } I have a list of Employees: List<Employee> employeeList =  new  List<Employee>(){    new  Employee() { Id = 1, Name =  "Sunny" , Department =  "Technical"  },    new  Employee() { Id=2, Name= "Pinki" , Department = "HR" },    new  Employee() { Id=3, Name= "Tensy" , De...
3 comments
Read more

Extension methods in C#

Consider the class C# 1 2 3 4 5 6 7 8 9 10 11 12 13          namespace ExtensionMethod      {          public class testClass {              public string sayHello ( ) {              return "Hello" ;            }        }      }     Invoke the above from your form using C# 1 2 3 4 5 6          testClass test = new testClass ( ) ;      MessageBox . Show ( test . sayHello ( ) ) ;     This will show “Hello” in message box. Consider the scenario where you don...
5 comments
Read more