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DataSet.WriteXml Method (String, XmlWriteMode)

Writes the current data, and optionally the schema, for the DataSet to the specified file using the specified 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(
	string fileName,
	XmlWriteMode mode
)

Parameters

fileName
Type: System.String

The file name (including the path) to which to write.

mode
Type: System.Data.XmlWriteMode

One of the XmlWriteMode values.

ExceptionCondition
SecurityException

FileIOPermission is not set to Write.

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.

NoteNote

An InvalidOperationException will be thrown if a column type in the DataRow being read from or written to implements IDynamicMetaObjectProvider and does not implement IXmlSerializable.

The following example uses 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";

    // Write to the file with the WriteXml method.
    thisDataSet.WriteXml(filename);
}

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, 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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