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DataSet.ReadXmlSchema Method (Stream)

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

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

'Declaration
Public Sub ReadXmlSchema ( _
	stream As Stream _
)
'Usage
Dim instance As DataSet
Dim stream As Stream

instance.ReadXmlSchema(stream)
public void ReadXmlSchema (
	Stream stream
)
public function ReadXmlSchema (
	stream : Stream
)
Not applicable.

Parameters

stream

The Stream from which 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.

Classes that derive from the Stream class include BufferedStream, FileStream, MemoryStream, and NetworkStream.

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.

The following example creates a FileStream object to read an XML schema with, and invokes the ReadXmlSchema method with the object.

Private Sub ReadSchemaFromFileStream(thisDataSet As DataSet)
    ' Set the file path and name. Modify this for your purposes.
    Dim filename As String = "Schema.xml"

    ' Create the FileStream object with the file name, 
    ' and set to open the file
    Dim stream As New System.IO.FileStream _
        (filename, System.IO.FileMode.Open)

    ' Read the schema into the DataSet.
    thisDataSet.ReadXmlSchema(stream)

    ' Close the FileStream.
    stream.Close()
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

XNA Framework

Supported in: 1.0
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