XML和关系数据----用XML加载数据集

private const String document = "books.xml";
private const String myLoadSchema = "books.xsd";
private XmlDataDocument myXmlDataDocument;
public static void Main()
{
String[] args = {document, myLoadSchema};
LoadDataSetXMLDataSample myLoadDataSetXMLDataSample = new LoadDataSetXMLDataSample();
myLoadDataSetXMLDataSample.Run(args);
}
public void Run(String[] args)
{
try
{
Console.WriteLine("Creating an XmlDataDocument ...");
myXmlDataDocument = new XmlDataDocument();
ParseSchema(args[1]);
DisplayTableStructure();
myXmlDataDocument.Load(args[0]);
DisplayTables(myXmlDataDocument.DataSet);
}
catch (Exception e)
{
Console.WriteLine ("Exception: {0}", e.ToString());
}
}
// Loads a specified schema into the DataSet
public void ParseSchema(String schema)
{
StreamReader myStreamReader = null;
try
{
Console.WriteLine("Reading Schema file ...");
myStreamReader = new StreamReader(schema);
myXmlDataDocument.DataSet.ReadXmlSchema(myStreamReader);
}
catch (Exception e)
{
Console.WriteLine ("Exception: {0}", e.ToString());
}
finally
{
if (myStreamReader != null)
myStreamReader.Close();
}
}

private const document as string = "books.xml"
private const myLoadSchema as string = "books.xsd"
private myXmlDataDocument as XmlDataDocument
shared sub Main()
Dim args As String() = {document, myLoadSchema}
Dim myLoadDataSetXMLDataSample as LoadDataSetXMLDataSample
myLoadDataSetXMLDataSample = new LoadDataSetXMLDataSample()
myLoadDataSetXMLDataSample.Run(args)
end sub
public sub Run(args As String())
try
Console.WriteLine("Creating an XmlDataDocument ...")
myXmlDataDocument = new XmlDataDocument()
ParseSchema(args(1))
DisplayTableStructure()
myXmlDataDocument.Load(args(0))
DisplayTables(myXmlDataDocument.DataSet)
catch e as exception
Console.WriteLine ("Exception: " & e.ToString())
end try
end sub
' Loads a specified schema into the DataSet
public sub ParseSchema(schema as string)
Dim myStreamReader as StreamReader = nothing
try
myStreamReader = new StreamReader(schema)
Console.WriteLine("Reading Schema file ...")
myXmlDataDocument.DataSet.ReadXmlSchema(myStreamReader)
catch e as exception
Console.WriteLine ("Exception: " & e.ToString())
finally
If Not myStreamReader Is nothing
myStreamReader.Close()
end if
end try
end sub

// Displays the contents of the DataSet tables
private void DisplayTables(DataSet dataset)
{
// Navigate Dataset
Console.WriteLine("Content of Tables ...\r\n");
foreach(DataTable table in dataset.Tables)
{
Console.WriteLine("TableName = " + table.TableName);
Console.WriteLine ("{0}", "---------");
Console.WriteLine("Columns ...\r\n");
foreach(DataColumn column in table.Columns)
{
Console.Write("{0,-22}",column.ColumnName);
}
Console.WriteLine();
Console.WriteLine("\r\nNumber of rows = {0}", table.Rows.Count.ToString());
Console.WriteLine("Rows ...\r\n");
foreach(DataRow row in table.Rows)
{
foreach(Object value in row.ItemArray)
{
Console.Write("{0,-22}",value.ToString());
}
Console.WriteLine();
}
Console.WriteLine();
}
}

' Displays the contents of the DataSet tables
private sub DisplayTables(myDataset as DataSet)
' Navigate Dataset
Console.WriteLine()
Console.WriteLine("Content of Tables ...")
Dim table as DataTable
for each table in myDataset.Tables
Console.WriteLine("TableName = " & table.TableName.ToString())
Console.WriteLine ("---------")
Console.WriteLine("Columns ...")
Dim column as DataColumn
for each column in table.Columns
Console.Write("{0,-22}",column.ColumnName.ToString())
next
Console.WriteLine()
Console.WriteLine("Number of rows = {0}", table.Rows.Count.ToString())
Console.WriteLine("Rows ...")
Dim row as DataRow
for each row in table.Rows
Dim value as object
for each value in row.ItemArray
Console.Write("{0,-22}",value.ToString())
Next
Console.WriteLine()
Next
Console.WriteLine()
Next
end sub