ReadXmlSchema Method (TextReader)

DataSet.ReadXmlSchema Method (TextReader)

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

Namespace: System.Data
Assembly: System.Data (in

public void ReadXmlSchema (
	TextReader reader
public void ReadXmlSchema (
	TextReader reader
public function ReadXmlSchema (
	reader : TextReader



The TextReader 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 inherit from the TextReader class include the StreamReader and StringReader classes.


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 StreamReader object to read a schema with, and invokes the ReadXmlSchema method with the object.

private void ReadSchemaFromStreamReader()
    // Create the DataSet to read the schema into.
    DataSet thisDataSet = new DataSet();

    // Set the file path and name. Modify this for your purposes.
    string filename="Schema.xml";

    // Create a StreamReader object with the file path and name.
    System.IO.StreamReader readStream = 
        new System.IO.StreamReader(filename);

    // Invoke the ReadXmlSchema method with the StreamReader object.

    // Close the StreamReader

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0

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