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DataSet.WriteXml Method (String, XmlWriteMode)

.NET Framework 1.1

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 XMLWriteMode parameter to WriteSchema.

[Visual Basic]
Overloads Public Sub WriteXml( _
   ByVal fileName As String, _
   ByVal mode As XmlWriteMode _
public void WriteXml(
 string fileName,
 XmlWriteMode mode
public: void WriteXml(
 String* fileName,
 XmlWriteMode mode
public function WriteXml(
   fileName : String,
 mode : XmlWriteMode


The file name (including the path) to which to write.
One of the XmlWriteMode values.


Exception Type Condition
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 WriteXmlMode 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.


[Visual Basic, C#, C++] The following example uses the WriteXml method to write an XML document.

[Visual Basic] 
Private Sub WriteXmlToFile(thisDataSet As DataSet)
    If thisDataSet Is Nothing Then
    End If
    ' Create a file name to write to.
    Dim filename As String = "myXmlDoc.xml"
    ' Write to the file with the WriteXml method.
End Sub

private void WriteXmlToFile(DataSet thisDataSet) {
   if (thisDataSet == null) { return; }
   // Create a file name to write to.
   string filename = "myXmlDoc.xml";
   // Write to the file with the WriteXml method.

 void WriteXmlToFile(DataSet* thisDataSet) {
    if (thisDataSet == 0) { return; }
    // Create a file name to write to.
    String* filename = S"myXmlDoc.xml";
    // Write to the file with the WriteXml method.

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

.NET Framework Security: 

See Also

DataSet Class | DataSet Members | System.Data Namespace | DataSet.WriteXml Overload List | ReadXml | ReadXmlSchema | WriteXml | WriteXmlSchema

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