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https://social.msdn.microsoft.com/Forums/silverlight/en-US/0d9616af-1bb1-4c2f-b293-87e23aa92a1a/this-entityset-of-type-does-not-support-the-add-operation
The projections to the client are well but when I try to add some new columns on the client I get the message: "This EntitySet of type 'Primavera.Athena.QueryBuilder.Model.QueryModel.Column' does not support the 'Add' operation."
https://stackoverflow.com/questions/2445634/ria-services-entityset-does-not-support-edit-operation
The problem is this: whenever i try to edit some data of a record (in this example the first record) i get this error: This EntitySet of type 'Culture' does not support the 'Edit' operation. I thought that i did something weird and tried to create an object of type Culture and assign a value to it: it …
https://social.msdn.microsoft.com/Forums/silverlight/en-US/d65def2c-1014-42cb-80e1-83321858ced8/this-entityset-of-type-does-not-support-the-add-operation
I know I have to implement the Add operation for the new Entity I'm putting, but how can I do that? I mean I did the class, the get method but how do I do the insert operation, I can't see my class in this.ObjectContext, so to whom I would be adding this new object, I have the next fragments of ... · Well I'm not entirely clear on what you are trying ...
https://social.msdn.microsoft.com/Forums/en-US/f964dd1e-d58c-4b81-8ba3-7c8ad6b08ba1/this-entityset-of-type-xx-does-not-support-the-add-operation
Apr 01, 2010 · This EntitySet of type 'xx' does not support the 'Add' operation. ... The generated code throws the exception since you're missing the insert method for the entity you try to add. It won't be sent over the wire until you do the SubmitChanges on the domainservice. Thursday, April 1, 2010 8:04 AM.
https://social.msdn.microsoft.com/Forums/silverlight/en-US/4abbaf50-39cc-4726-a7a2-fb43081d0555/adding-data-to-entityset-this-entityset-of-type-does-not-support-the-add-operation
I'm a newbie with RIA Services and I'have a probleme trying to add data to an EntitySet. I'have a really simple Solution with only one table, model and domain service are in a RIA Services Class. I received "This EntitySet of type 'TestRia.DataServices.Warehouse.Model.Libelle' does not support the 'Add' operation." My DomainService :
https://docs.microsoft.com/en-us/aspnet/web-api/overview/odata-support-in-aspnet-web-api/odata-v4/use-open-types-in-odata-v4
Open Types in OData v4 with ASP.NET Web API. 09/15/2014; 5 minutes to read +2; In this article. by Microsoft. In OData v4, an open type is a structured type that contains dynamic properties, in addition to any properties that are declared in the type definition. Open types let you add flexibility to …
https://docs.microsoft.com/en-us/ef/core/managing-schemas/migrations/
Migrations. 10/05/2018; 5 minutes to read +7; In this article. A data model changes during development and gets out of sync with the database. You can drop the database and let EF create a new one that matches the model, but this procedure results in the loss of data.
https://docs.microsoft.com/en-us/ef/core/saving/transactions
Although support is quite common among ADO.NET providers for .NET Framework, the API has only been recently added to .NET Core and hence support is not as widespread. If a provider does not implement support for System.Transactions, it is possible that calls to …
https://docs.microsoft.com/en-us/dotnet/framework/data/adonet/entity-set
An entity set is not a data modeling construct; it does not describe the structure of data. Instead, an entity set provides a construct for a hosting or storage environment (such as the common language runtime or a SQL Server database) to group entity type instances so that they can be mapped to a …
https://docs.microsoft.com/en-us/ef/ef6/saving/change-tracking/entity-state
An entity can be in one of five states as defined by the EntityState enumeration. These states are: Added: the entity is being tracked by the context but does not yet exist in the database; Unchanged: the entity is being tracked by the context and exists in the database, and its property values have not changed from the values in the database
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