Separate datasets and TableAdapters into different projects

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Note

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Typed datasets have been enhanced so that the TableAdapters and dataset classes can be generated into separate projects. This enables you to quickly separate application layers and generate n-tier data applications.

The following procedure describes the process of using the Dataset Designer to generate dataset code into a project that is separate from the project that contains the generated TableAdapter code.

Separatedatasets and TableAdapters

When you separate dataset code from TableAdapter code, the project that contains the dataset code must be located in the current solution. If this project is not located in the current solution, it won't be available in the DataSet Project list in the Properties window.

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Your computer might show different names or locations for some of the Visual Studio user interface elements in the following instructions. The Visual Studio edition that you have and the settings that you use determine these elements. For more information, see Personalizing the IDE.

To separate the dataset into a different project

  1. Open a solution that contains a dataset (.xsd file).

    Note

    If the solution does not contain the project into which you want to separate your dataset code, create the project, or add an existing project to the solution.

  2. Double-click a typed dataset file (an .xsd file) in Solution Explorer to open the dataset in the Dataset Designer.

  3. Select an empty area of the Dataset Designer.

  4. In the Properties window, locate the DataSet Project node.

  5. In the DataSet Project list, select the name of the project into which you want to generate the dataset code.

    After you select the project into which you want to generate the dataset code, the DataSet File property is populated with a default file name. You can change this name if necessary. Additionally, if you want to generate the dataset code into a specific directory, you can set the Project Folder property to the name of a folder.

    Note

    When you separate datasets and TableAdapters (by setting the DataSet Project property), existing partial dataset classes in the project won't be moved automatically. Existing dataset partial classes must be moved manually to the dataset project.

  6. Save the dataset.

    The dataset code is generated into the selected project in the DataSet Project property, and the TableAdapter code is generated into the current project.

    By default, after you separate the dataset and TableAdapter code, the result is a discrete class file in each project. The original project has a file named DatasetName.Designer.vb (or DatasetName.Designer.cs) that contains the TableAdapter code. The project that's designated in the Dataset Project property has a file named DatasetName.DataSet.Designer.vb (or DatasetName.DataSet.Designer.cs) that contains the dataset code.

Note

To view the generated class file, select the dataset or TableAdapter project. Then, in Solution Explorer, select Show All Files .

See Also

N-Tier Data Applications Overview Walkthrough: Creating an N-Tier Data Application Hierarchical update Accessing data in Visual Studio ADO.NET