WriteXml Method (Stream)

DataSet.WriteXml Method (Stream)


Writes the current data for the DataSet using the specified System.IO.Stream.

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

Public Sub WriteXml (
	stream As Stream


Type: System.IO.Stream

A Stream object used to write to a file.

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, use one of the overloads that includes the mode parameter, and set its value 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.


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 creates a System.IO.FileStream object. The object is then used with the WriteXml method to write an XML document.

Private Sub WriteXmlToFile(thisDataSet As DataSet)
     If thisDataSet Is Nothing Then
     End If 

    ' Create a file name to write to.
     Dim filename As String = "XmlDoc.xml"

     ' Create the FileStream to write with.
     Dim stream As New System.IO.FileStream _
        (filename, System.IO.FileMode.Create)

     ' Write to the file with the WriteXml method.
End Sub

.NET Framework
Available since 1.1
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