C# 经典 实例 程序

<?xml version="1.0" standalone="yes"?> <NewDataSet> <Customers> <CustomerID>ALFKI</CustomerID> <CompanyName>Acme, Inc.</CompanyName> <ContactName>Maria Anders</ContactName> <ContactTitle>Sales Representative</ContactTitle> <Address>Obere Str. 57</Address> <City>Berlin</City> <PostalCode>12209</PostalCode> <Country>Germany</Country> <Phone>030-0074321</Phone> <Fax>030-0076545</Fax> <Orders> <OrderID>10643</OrderID> <CustomerID>ALFKI</CustomerID> <EmployeeID>6</EmployeeID> <OrderDate>1995-09-25T00:00:00.0000000-05:00</OrderDate> <RequiredDate>1995-10-23T00:00:00.0000000-05:00</RequiredDate> <ShippedDate>1995-10-03T00:00:00.0000000-05:00</ShippedDate> <ShipVia>1</ShipVia> <Freight>29.46</Freight> <ShipName>Alfreds Futterkiste</ShipName> <ShipAddress>Obere Str. 57</ShipAddress> <ShipCity>Berlin</ShipCity> <ShipPostalCode>12209</ShipPostalCode> <ShipCountry>Germany</ShipCountry> <Order_x0020_Details> <OrderID>10643</OrderID> <ProductID>28</ProductID> <UnitPrice>45.6</UnitPrice> <Quantity>15</Quantity> <Discount>0.25</Discount> </Order_x0020_Details> <Order_x0020_Details> <OrderID>10643</OrderID> <ProductID>39</ProductID> <UnitPrice>18</UnitPrice> <Quantity>21</Quantity> <Discount>0.25</Discount> </Order_x0020_Details> <Order_x0020_Details> <OrderID>10643</OrderID> <ProductID>46</ProductID> <UnitPrice>12</UnitPrice> <Quantity>2</Quantity> <Discount>0.25</Discount> </Order_x0020_Details> </Orders> <Orders> <OrderID>10692</OrderID> <CustomerID>ALFKI</CustomerID> <EmployeeID>4</EmployeeID> <OrderDate>1995-11-03T00:00:00.0000000-05:00</OrderDate> <RequiredDate>1995-12-01T00:00:00.0000000-05:00</RequiredDate> <ShippedDate>1995-11-13T00:00:00.0000000-05:00</ShippedDate> <ShipVia>2</ShipVia> <Freight>61.02</Freight> <ShipName>Alfred's Futterkiste</ShipName> <ShipAddress>Obere Str. 57</ShipAddress> <ShipCity>Berlin</ShipCity> <ShipPostalCode>12209</ShipPostalCode> <ShipCountry>Germany</ShipCountry> <Order_x0020_Details> <OrderID>10692</OrderID> <ProductID>63</ProductID> <UnitPrice>43.9</UnitPrice> <Quantity>20</Quantity> <Discount>0</Discount> </Order_x0020_Details> </Orders> <Orders> <OrderID>10702</OrderID> <CustomerID>ALFKI</CustomerID> <EmployeeID>4</EmployeeID> <OrderDate>1995-11-13T00:00:00.0000000-05:00</OrderDate> <RequiredDate>1995-12-25T00:00:00.0000000-05:00</RequiredDate> <ShippedDate>1995-11-21T00:00:00.0000000-05:00</ShippedDate> <ShipVia>1</ShipVia> <Freight>23.94</Freight> <ShipName>Alfred's Futterkiste</ShipName> <ShipAddress>Obere Str. 57</ShipAddress> <ShipCity>Berlin</ShipCity> <ShipPostalCode>12209</ShipPostalCode> <ShipCountry>Germany</ShipCountry> <Order_x0020_Details> <OrderID>10702</OrderID> <ProductID>3</ProductID> <UnitPrice>10</UnitPrice> <Quantity>6</Quantity> <Discount>0</Discount> </Order_x0020_Details> <Order_x0020_Details> <OrderID>10702</OrderID> <ProductID>76</ProductID> <UnitPrice>18</UnitPrice> <Quantity>15</Quantity> <Discount>0</Discount> </Order_x0020_Details> </Orders> <Orders> <OrderID>10835</OrderID> <CustomerID>ALFKI</CustomerID> <EmployeeID>1</EmployeeID> <OrderDate>1996-02-15T00:00:00.0000000-05:00</OrderDate> <RequiredDate>1996-03-14T00:00:00.0000000-05:00</RequiredDate> <ShippedDate>1996-02-21T00:00:00.0000000-05:00</ShippedDate> <ShipVia>3</ShipVia> <Freight>69.53</Freight> <ShipName>Alfred's Futterkiste</ShipName> <ShipAddress>Obere Str. 57</ShipAddress> <ShipCity>Berlin</ShipCity> <ShipPostalCode>12209</ShipPostalCode> <ShipCountry>Germany</ShipCountry> <Order_x0020_Details> <OrderID>10835</OrderID> <ProductID>59</ProductID> <UnitPrice>55</UnitPrice> <Quantity>15</Quantity> <Discount>0</Discount> </Order_x0020_Details> <Order_x0020_Details> <OrderID>10835</OrderID> <ProductID>77</ProductID> <UnitPrice>13</UnitPrice> <Quantity>2</Quantity> <Discount>0.2</Discount> </Order_x0020_Details> </Orders> <Orders> <OrderID>10952</OrderID> <CustomerID>ALFKI</CustomerID> <EmployeeID>1</EmployeeID> <OrderDate>1996-04-15T00:00:00.0000000-05:00</OrderDate> <RequiredDate>1996-05-27T00:00:00.0000000-05:00</RequiredDate> <ShippedDate>1996-04-23T00:00:00.0000000-05:00</ShippedDate> <ShipVia>1</ShipVia> <Freight>40.42</Freight> <ShipName>Alfred's Futterkiste</ShipName> <ShipAddress>Obere Str. 57</ShipAddress> <ShipCity>Berlin</ShipCity> <ShipPostalCode>12209</ShipPostalCode> <ShipCountry>Germany</ShipCountry> <Order_x0020_Details> <OrderID>10952</OrderID> <ProductID>6</ProductID> <UnitPrice>25</UnitPrice> <Quantity>16</Quantity> <Discount>0.05</Discount> </Order_x0020_Details> <Order_x0020_Details> <OrderID>10952</OrderID> <ProductID>28</ProductID> <UnitPrice>45.6</UnitPrice> <Quantity>2</Quantity> <Discount>0</Discount> </Order_x0020_Details> </Orders> <Orders> <OrderID>11011</OrderID> <CustomerID>ALFKI</CustomerID> <EmployeeID>3</EmployeeID> <OrderDate>1996-05-09T00:00:00.0000000-05:00</OrderDate> <RequiredDate>1996-06-06T00:00:00.0000000-05:00</RequiredDate> <ShippedDate>1996-05-13T00:00:00.0000000-05:00</ShippedDate> <ShipVia>1</ShipVia> <Freight>1.21</Freight> <ShipName>Alfred's Futterkiste</ShipName> <ShipAddress>Obere Str. 57</ShipAddress> <ShipCity>Berlin</ShipCity> <ShipPostalCode>12209</ShipPostalCode> <ShipCountry>Germany</ShipCountry> <Order_x0020_Details> <OrderID>11011</OrderID> <ProductID>58</ProductID> <UnitPrice>13.25</UnitPrice> <Quantity>40</Quantity> <Discount>0.05</Discount> </Order_x0020_Details> <Order_x0020_Details> <OrderID>11011</OrderID> <ProductID>71</ProductID> <UnitPrice>21.5</UnitPrice> <Quantity>20</Quantity> <Discount>0</Discount> </Order_x0020_Details> </Orders> </Customers> <Customers> <CustomerID>ANATR</CustomerID> <CompanyName>Ana Trujillo Emparedados y helados</CompanyName> <ContactName>Ana Trujillo</ContactName> <ContactTitle>Owner</ContactTitle> <Address>Avda. de la Constitución 2222</Address> <City>México D.F.</City> <PostalCode>05021</PostalCode> <Country>Mexico</Country> <Phone>(5) 555-4729</Phone> <Fax>(5) 555-3745</Fax> <Orders> <OrderID>10308</OrderID> <CustomerID>ANATR</CustomerID> <EmployeeID>7</EmployeeID> <OrderDate>1994-10-19T00:00:00.0000000-05:00</OrderDate> <RequiredDate>1994-11-16T00:00:00.0000000-05:00</RequiredDate> <ShippedDate>1994-10-25T00:00:00.0000000-05:00</ShippedDate> <ShipVia>3</ShipVia> <Freight>1.61</Freight> <ShipName>Ana Trujillo Emparedados y helados</ShipName> <ShipAddress>Avda. de la Constitución 2222</ShipAddress> <ShipCity>México D.F.</ShipCity> <ShipPostalCode>05021</ShipPostalCode> <ShipCountry>Mexico</ShipCountry> <Order_x0020_Details> <OrderID>1