WriteXml Method (XmlWriter, XmlWriteMode)

DataSet.WriteXml Method (XmlWriter, XmlWriteMode)

Writes the current data, and optionally the schema, for the DataSet using the specified XmlWriter and XmlWriteMode. To write the schema, set the value for the mode parameter to WriteSchema.

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

public void WriteXml (
	XmlWriter writer,
	XmlWriteMode mode
public void WriteXml (
	XmlWriter writer, 
	XmlWriteMode mode
public function WriteXml (
	writer : XmlWriter, 
	mode : XmlWriteMode
Not applicable.



The XmlWriter with which to write.


One of the XmlWriteMode values.

The WriteXml method provides a way to write either data only, or both data and schema from a DataSet into an XML document, whereas the WriteXmlSchema method writes only the schema. To write both data and schema, set the mode parameter to WriteSchema.

Note that the same is true for the ReadXml and ReadXmlSchema methods, respectively. To read XML data, or both schema and data into the DataSet, use the ReadXml method. To read just the schema, use the ReadXmlSchema method.

The following example creates a System.IO.FileStream object that is used to create a new System.Xml.XmlTextWriter. The XmlTextWriter object is used with the WriteXml method to write an XML document.

private void WriteXmlToFile(DataSet thisDataSet) 
    if (thisDataSet == null) { return; }

    // Create a file name to write to.
    string filename = "XmlDoc.xml";

    // Create the FileStream to write with.
    System.IO.FileStream stream = new System.IO.FileStream
        (filename, System.IO.FileMode.Create);

    // Create an XmlTextWriter with the fileStream.
    System.Xml.XmlTextWriter xmlWriter = 
        new System.Xml.XmlTextWriter(stream, 

    // Write to the file with the WriteXml method.

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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