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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)

public void ReadXmlSchema(
	Stream stream
)

Parameters

stream
Type: System.IO.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.

NoteNote

Data corruption can occur if the msdata:DataType and the xs:type types do not match. No exception will be thrown.

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 void ReadSchemaFromFileStream(DataSet thisDataSet)
{
    // Set the file path and name. 
    // Modify this for your purposes. 
    string filename="Schema.xml";

    // Create the FileStream object with the file name,  
    // and set to open the file.
    System.IO.FileStream stream = 
        new System.IO.FileStream(filename,System.IO.FileMode.Open);

    // Read the schema into the DataSet.
    thisDataSet.ReadXmlSchema(stream);

    // Close the FileStream.
    stream.Close();
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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