How to: Add a Deleter Method

 

You can enable an end user to delete a data record from an external list on a SharePoint site by adding a Deleter method to the model. For more information, see Designing a Business Data Connectivity Model.

To create a Deleter method

  1. On the BDC designer, choose an entity.

  2. On the menu bar, choose View, Other Windows, BDC Method Details.

    The BDC Method Details window opens. For more information about this window, see BDC Model Design Tools Overview.

  3. In the Add a Method list, choose Create a Deleter Method.

    Visual Studio adds the following elements to the model. These elements appear in the BDC Method Details window.

    • A method named Delete.

    • An input parameter for the method.

    • A type descriptor for the parameter.

    • A method instance for the method.

    For more information, see Designing a Business Data Connectivity Model.

  4. In Solution Explorer, open the shortcut menu of the service code file that was generated for the entity, and then choose View Code.

    The entity service code file opens in the Code Editor. For more information about the entity service code file, see Creating a Business Data Connectivity Model.

  5. Add code to the Deleter method to delete a record. The following example deletes a line item from a sales order by using the AdventureWorks sample database for SQL Server.

    System_CAPS_ICON_note.jpg Note


    The method in this example uses two input parameters.

    System_CAPS_ICON_note.jpg Note


    Replace the value of the ServerName field with the name of your server.

            public static void Delete(int salesOrderID, int salesOrderDetailID)
            {
                const string ServerName = "MySQLServerName";
                AdventureWorksDataContext dataContext = new AdventureWorksDataContext
                      ("Data Source=" + ServerName + ";" +
                       "Initial Catalog=AdventureWorks;Integrated Security=True");
    
                SalesOrderDetail SalesOrderDetail =
                       (from SalesOrderDetails in dataContext.SalesOrderDetails.AsEnumerable().Take(20)
                        where SalesOrderDetails.SalesOrderID == salesOrderID &&
                        SalesOrderDetails.SalesOrderDetailID == salesOrderDetailID
                        select SalesOrderDetails).Single();
    
                dataContext.SalesOrderDetails.DeleteOnSubmit(SalesOrderDetail);
                dataContext.SubmitChanges();
            }
    

Designing a Business Data Connectivity Model
How to: Add a Finder Method
How to: Add a Specific Finder Method
How to: Add a Creator Method
How to: Add an Updater Method
BDC Model Design Tools Overview
How to: Add a Parameter to a Method
How to: Define a Method Instance

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