Provides a set of visual tools for working with XML Schemas, ADO.NET datasets, and XML documents. The XML Designer supports the XML Schema Definition (XSD) language defined by the World Wide Web Consortium (WC3). The designer does not support DTDs (document type definitions) or other XML schema languages, such as XDR (XML-Data Reduced).
To display the designer, add a dataset, XML Schema, or XML file to your project or open any of the file types listed in the table below.
Caution There is no Undo command when working in Schema view. Plan your work carefully and save your files often.
The designer provides the following three views (or modes) to work on XML files, XML Schemas, and datasets:
|View||Description||File types supported|
|Schema||For visually creating and modifying XML Schemas and ADO.NET datasets.||.xsd|
|Data||For visually modifying XML data files in a structured data grid.||.xml|
|XML||For editing XML; the source editor provides color-coding and IntelliSense, including Complete Word and List Members.||.xml
Schema view provides a visual representation of the elements, attributes, types, and so on that make up XML Schemas and ADO.NET datasets.
Note For details about the relationship between XML Schemas and ADO.NET datasets, see Relationship Between XML Schemas and Datasets.
In Schema view you can construct schemas and datasets by dropping elements on the design surface from either the XML Schema tab of the Toolbox or from Server Explorer. Additionally, you can add elements to the designer by right-clicking the design surface and selecting Add from the shortcut menu.
In Schema view you can:
- Construct and modify existing XML Schemas and ADO.NET datasets
- Create and edit relationships between tables
- Create and edit keys
- Generate ADO.NET datasets from XML Schemas
Note The layout of elements in Schema view is stored in the .xsx file, which can be seen by clicking Show All Files in the Solution Explorer toolbar, and then expanding the .xsd file. If there is no .xsx file present, it means the .xsd file has never been opened in the XML Designer.
Customizing Schema View
The following features modify the visual layout of elements in Schema view:
- Expanding or collapsing of nested elements
- Automaticly arranging layout of elements
- Resetting default state of collapsed elements
To zoom in or out
- Right-click the design surface.
- Point to Zoom on the context menu and select a zoom setting from the list.
- or -
- Type a number from 10 to 400 in the Zoom box on the XML Schema toolbar.
To expand hidden nested elements
- Click the plus icon on the bottom of the element.
To collapse nested elements
- Click the minus icon on the bottom-most element that you want to appear on the designer.
To automatically arrange the layout of elements
- Right-click the design surface, then click Auto-Arrange on the shortcut menu.
Note There is no Undo option after selecting Auto-Arrange.
To reset the default state of collapsed elements
- Right-click the design surface, then click Show Default Tree on the shortcut menu.
Data view provides a data grid that can be used to modify .xml files. Only the content (but not the tags and structure) in an XML file can be edited in Data view.
There are two separate areas in Data view: Data Tables and Data. The Data Tables area is a list of relations defined in the XML file, in the order of its nesting (from the outermost to the innermost). The Data area is a datagrid that displays data based on the selection in the Data Tables area.
Note Newly created XML files contain no data and therefore cannot be displayed in Data view. There are also some instances of XML documents where data view cannot be invoked at all. Although the XML would be considered well formed, if it is not structured data trying to switch to Data view will generate the following message: "Although this document is well formed, it contains structure that Data View cannot display."
In Data view you can:
- Manually populate data tables
- Edit existing data tables
- Generate an XML Schema from an XML document
XML view provides an editor for editing raw XML and provides IntelliSense and color coding. Statement completion is available when working on .xsd files and .xml files that have an associated schema. Type < to initiate a tag and you will be presented with a list of elements that are valid at that location. After you type the element name and press the SPACEBAR, you will be presented with a list of attributes that the element supports.