Datacontext submitchanges not updating nextgen gallery error updating thumbnail

Posted by / 30-Apr-2019 14:46

This is not an issue as long as the clients are only reading the data.

Attach attaches all entities in the object graph of the provided object.

On the middle tier, a new Data Context is created, the object is attached to the Data Context by using the Insert On Submit method, and the object is inserted when Submit Changes is called.

Exceptions, callbacks, and error conditions can be handled just as in any other Web service scenario. Public Sub Insert Order(By Val o As Order) Dim db As New Northwind Classes1Data Context(connection String) db. Insert On Submit(o) ' Exception handling not shown. Submit Changes() End Sub To delete an existing object from the database, the presentation tier calls the relevant method on the middle tier interface, and passes in its copy that includes original values of the object to be deleted.

is the source of all entities mapped over a database connection.

It tracks changes that you made to all retrieved entities and maintains an "identity cache" that guarantees that entities retrieved more than one time are represented by using the same object instance.

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This API supports the product infrastructure and is not intended to be used directly from your code.

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