参见如下:
private void DemonstrateReadWriteXMLDocumentWithXMLReader(){
// Create a DataSet with one table and two columns.
DataSet OriginalDataSet = new DataSet("myDataSet");
OriginalDataSet.Namespace= "NetFrameWork";
DataTable myTable = new DataTable("myTable");
DataColumn c1 = new DataColumn("id", Type.GetType("System.Int32"));
c1.AutoIncrement= true;
DataColumn c2 = new DataColumn("item");
myTable.Columns.Add(c1);
myTable.Columns.Add(c2);
OriginalDataSet.Tables.Add(myTable);
// Add ten rows.
DataRow newRow;
for(int i = 0; i < 10; i++){
newRow = myTable.NewRow();
newRow["item"]= "item " + i;
myTable.Rows.Add(newRow);
}
OriginalDataSet.AcceptChanges();
// Print out values of each table in the DataSet using the
// function defined below.
PrintValues(OriginalDataSet, "Original DataSet");
// Write the XML schema and data to file with FileStream.
string xmlFilename = "myXmlDocument.xml";
// Create FileStream
System.IO.FileStream fsWriteXml = new System.IO.FileStream
(xmlFilename, System.IO.FileMode.Create);
// Create an XmlTextWriter to write the file.
System.Xml.XmlTextWriter xmlWriter = new System.Xml.XmlTextWriter
(fsWriteXml, System.Text.Encoding.Unicode);
// Use WriteXml to write the document.
OriginalDataSet.WriteXml(xmlWriter);
// Close the FileStream.
fsWriteXml.Close();
// Dispose of the original DataSet.
OriginalDataSet.Dispose();
// Create a new DataSet.
DataSet newDataSet = new DataSet("New DataSet");
// Read the XML document back in.
// Create new FileStream to read schema with.
System.IO.FileStream fsReadXml = new System.IO.FileStream
(xmlFilename, System.IO.FileMode.Open);
// Create an XmlTextReader to read the file.
System.Xml.XmlTextReader myXmlReader =
new System.Xml.XmlTextReader(fsReadXml);
// Read the XML document into the DataSet.
newDataSet.ReadXml(myXmlReader);
// Close the XmlTextReader
myXmlReader.Close();
// Print out values of each table in the DataSet using the
// function defined below.
PrintValues(newDataSet,"New DataSet");
}
private void PrintValues(DataSet ds, string label){
Console.WriteLine("\n" + label);
foreach(DataTable t in ds.Tables){
Console.WriteLine("TableName: " + t.TableName);
foreach(DataRow r in t.Rows){
foreach(DataColumn c in t.Columns){
Console.Write("\t " + r[c] );
}
Console.WriteLine();
}
}
}