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DataSet.ReadXmlSchema Method (String)

Reads the XML schema from the specified file into the DataSet.

Namespace: System.Data
Assembly: System.Data (in system.data.dll)

'Declaration
Public Sub ReadXmlSchema ( _
	fileName As String _
)
'Usage
Dim instance As DataSet
Dim fileName As String

instance.ReadXmlSchema(fileName)
public void ReadXmlSchema (
	String fileName
)
public function ReadXmlSchema (
	fileName : String
)
Not applicable.

Parameters

fileName

The file name (including the path) from which to read.

Exception typeCondition

SecurityException

FileIOPermission is not set to Read.

Use the ReadXmlSchema method to create the schema for a DataSet. The schema includes table, relation, and constraint definitions. To write a schema to an XML document, use the WriteXmlSchema method.

The XML schema is written using the XSD standard.

The ReadXmlSchema method is generally invoked before invoking the ReadXml method which is used to fill the DataSet.

NoteNote:

If the schema for your DataSet contains elements of the same name, but different type, in the same namespace, an exception is be thrown when you attempt to read the schema into the DataSet with ReadXmlSchema. This exception does not occur if you are using .NET Framework version 1.0.

Windows Mobile 2003 for Pocket PC, Windows Mobile 2003 for Smartphone, Windows CE Platform Note: Relative paths are not supported when using the file:// URI scheme. Specify absolute path information.

Private Sub ReadSchemaFromFile()
    ' Create the DataSet to read the schema into.
    Dim thisDataSet As New DataSet()

    ' Set the file path and name. Modify this for your purposes.
    Dim filename As String = "Schema.xml"

    ' Invoke the ReadXmlSchema method with the file name.
    thisDataSet.ReadXmlSchema(filename)
End Sub

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0
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