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I have a project in visual studio ultimate 2010 (MVVM) and database, in SQLITE.
Everything worked fine, but now I have a problem with the ADO.NET Entity Data Model.
I searched for information about this and have not found much .. Every time I want to open the wizard, it just closes.
I think I should reinstall Visual Studio, but before doing so if anyone has had this error before and know what can be, I'd be grateful.
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asked Jun 03 '13 16:06
The Entity Data Model (EDM) is a set of concepts that describe the structure of data, regardless of its stored form. The EDM borrows from the Entity-Relationship Model described by Peter Chen in 1976, but it also builds on the Entity-Relationship Model and extends its traditional uses.
If we want to achieve more control over SQL commands and operations with the help of raw SQL Queries, then ADO.NET will be a great choice to start work with. Whereas if we want to develop the application in a much faster way with clear code maintainability, then Entity Framework will be the better choice.
Right-click on your project in the Solution Explorer window and select the menu option Add -> New Item. In the Add New Item dialog, select the Data category. Select the ADO.NET Entity Data Model template, give the Entity Data Model the name Northwind. edmx, and click the Add button.
Entity data model (EDM) refers to a set of concepts that describe data structure, regardless of its stored form. This model uses three key concepts to describe data structure: entity type, association type and property. EDM supports a set of primitive data types that define properties in a conceptual model.
I've found this can be a bug with third party data adapters being left in strange states. Open your View > Server Explorer and remove your third-party data connections. Then, try opening the wizard again.
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