Dbml not updating designer cs
For updating the record, first we need a unique ID of employee whose record we want to update.
For getting single record, Single Or Default is used in LINQ.
In LINQ, the same query can be used in, an SQL database, a Data Set, an array of objects in memory and so many other data types.
Link to SQL is Object Relation Mapping (ORM) framework.
You can create a projection that matches the employee object structure. If you want that few column should be display, then you can use linq query as LINQ provides the where clause to filter the query. Insert On Submit() method is used to insert the record.
Suppose that you want the record of those employees whose name is starts with letter “R” and salary greater than 20000. Submit Changes() method commits all the changes into the database.
You can easily see the sql query, which is generated by LINQ to SQL. Now open the file that we have already created in previous example.
In the given below code, you can easily see that, the table is converted into the class and the column name is converted into the properties of tbl Emps class.Here Stored Procedure name is Get All Employees, therefore we will get the Get All Employees() method.We can directly call this method using db Context object. CREATE PROCEDURE Insert Employees @ Emp ID integer, @ Emp Name varchar(100), @ Gender varchar(50), @ Salary money, @ Address varchar(200), @ Dep ID integer AS BEGIN -- Insert statements for procedure here insert into tbl Emps values(@ Emp ID, @ Emp Name , @ Gender , @ Salary , @ Address , @ Dep ID ) ENDCREATE PROCEDURE Update Employees @ Emp ID integer, @ Emp Name varchar(100), @ Gender varchar(50), @ Salary money, @ Address varchar(200), @ Dep ID integer AS BEGIN update tbl Emps set name=@ Emp Name, Gender=@ Gender , Salary=@ Salary , Address=@ Address , Dep ID=@ Dep ID where Emp ID=@ Emp ID END Now refresh the Data Connection on server explorer and drag these stored procedure on desiner pane as we have already done with select stored procedure.Before using these functions in C# by Data Context object, we have to map these function with tblemps entity.For doing mapping we have to configure it with tblemps entity in designer pane.