Best way to delete multiple records in a LINQ query?

Question

What is the best way to remove multiple records in one go with LINQ?

Answer 1

I agree with Khurram, it's much more efficient to do this with a simple stored procedure with LINQ (provided you have sufficient permissions in SQL to do this). I'll augment this with an example.

The stored procedure:

CREATE PROCEDURE [dbo].[RemovePermissionsFromRole] 
(
    @ROLE_ID int
)
AS
BEGIN
    SET NOCOUNT ON;

    DELETE FROM [RolePermissions] WHERE [RoleID] = @ROLE_ID;
END

Drag the stored procedure from the database explorer onto the methods pane in your DBML file. Save the file. And in code:

if (Request.QueryString["RoleID"] != null) {
    int roleID = Convert.ToInt32(Request.QueryString["RoleID"]);

    SETSDataContext context = new SETSDataContext();
    context.RemovePermissionsFromRole(roleID);
}