using System;
using System.Xml;
using System.Data;
using System.Data.SqlClient;

public class XmlQueryExample {

public static void Main() {
using (SqlConnection con = new SqlConnection()) {
con.ConnectionString = “Data Source = localhost;” +
“Database = Northwind; Integrated Security=SSPI”;
SqlCommand com = con.CreateCommand();
com.CommandType = CommandType.Text;
com.CommandText = “SELECT CustomerID, CompanyName” +
” FROM Customers FOR XML AUTO”;
XmlReader reader = null;
try {
con.Open();
reader = com.ExecuteXmlReader();
while (reader.Read()) {
Console.Write(reader.Name);
if (reader.HasAttributes) {
for (int i = 0; i < reader.AttributeCount; i++) { reader.MoveToAttribute(i); Console.Write(" {0}: {1}",reader.Name, reader.Value); } reader.MoveToElement(); } } } catch (Exception ex) { Console.WriteLine(ex.ToString()); } finally { if (reader != null) reader.Close(); } } } } [/csharp]

   
 

using System;
using System.Data;
using System.Data.SqlClient;
using System.Xml;

class UsingXmlDocument {
    public static void Main() {
        SqlConnection mySqlConnection =
          new SqlConnection(
            "server=localhost;database=Northwind;uid=sa;pwd=sa"
          );
        SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
        mySqlCommand.CommandText =
          "SELECT TOP 2 CustomerID, CompanyName, Country " +
          "FROM Customers " +
          "ORDER BY CustomerID";
        SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
        mySqlDataAdapter.SelectCommand = mySqlCommand;
        DataSet myDataSet = new DataSet();
        mySqlConnection.Open();
        mySqlDataAdapter.Fill(myDataSet, "Customers");
        mySqlConnection.Close();
        XmlDocument myXmlDocument = new XmlDocument();
        myXmlDocument.LoadXml(myDataSet.GetXml());
        Console.WriteLine("Contents of myXmlDocument:");
        myXmlDocument.Save(Console.Out);
        foreach (XmlNode myXmlNode in myXmlDocument.SelectNodes("/NewDataSet/Customers")) {
            Console.WriteLine("CustomerID = " + myXmlNode.ChildNodes[0].InnerText);
            Console.WriteLine("CompanyName = " + myXmlNode.ChildNodes[1].InnerText);
            Console.WriteLine("Country = " + myXmlNode.ChildNodes[2].InnerText);
        }
        XmlNode myXmlNode2 = myXmlDocument.SelectSingleNode("/NewDataSet/Customers[CustomerID=" ANATR"]");
        Console.WriteLine("CustomerID = " + myXmlNode2.ChildNodes[0].InnerText);
        Console.WriteLine("CompanyName = " + myXmlNode2.ChildNodes[1].InnerText);
        Console.WriteLine("Country = " + myXmlNode2.ChildNodes[2].InnerText);
    }
}

    

   


/*
 * C# Programmers Pocket Consultant
 * Author: Gregory S. MacBeth
 * Email: gmacbeth@comporium.net
 * Create Date: June 27, 2003
 * Last Modified Date:
 * Version: 1
 */
using System;
using System.Data;
using System.Data.SqlClient;

namespace Client.Chapter_13___ADO.NET
{
    public class UpdatingDataUsingSqlStatements
    {
        static void Main(string[] args)
        {
            SqlConnection MyConnection = new SqlConnection(@"Data Source=(local); Initial Catalog = CaseManager; Integrated Security=true");

            MyConnection.Open();

            String MyString = "UPDATE Test SET Contact = 'Lee'";
            SqlCommand MyCmd = new SqlCommand(MyString, MyConnection);

            MyCmd.ExecuteScalar();
            MyConnection.Close();
        }
    }
}


           
          

   


/*
 * C# Programmers Pocket Consultant
 * Author: Gregory S. MacBeth
 * Email: gmacbeth@comporium.net
 * Create Date: June 27, 2003
 * Last Modified Date:
 * Version: 1
 */
using System;
using System.Data;
using System.Data.SqlClient;

namespace Client.Chapter_13___ADO.NET
{
    public class UpdatingDataUsingCommondBuilder
    {
        static void Main(string[] args)
        {
            SqlConnection MyConnection = new SqlConnection(@"Data Source=(local); Initial Catalog = CaseManager; Integrated Security=true");
            SqlDataAdapter MyDataAdapter = new SqlDataAdapter("SELECT ID, Contact, Email FROM Test", MyConnection);
            DataSet MyDataSet = new DataSet();

            MyDataAdapter.Fill(MyDataSet);
            MyDataSet.Tables[0].Rows[0][0] = 55;

            SqlCommandBuilder MyCmd = new SqlCommandBuilder(MyDataAdapter);

            MyDataAdapter.Update(MyDataSet);
        }
    }
}


           
          

   

/*
 * C# Programmers Pocket Consultant
 * Author: Gregory S. MacBeth
 * Email: gmacbeth@comporium.net
 * Create Date: June 27, 2003
 * Last Modified Date:
 * Version: 1
 */
using System;
using System.Data;
using System.Data.OleDb;

namespace Client.Chapter_13___ADO.NET
{
    public class UpdatingADataSource
    {
        static void Main(string[] args)
        {
            OleDbConnection MyConnection = new OleDbConnection(@"Provider=Microsft.Jet.OLEDB.4.0; Data Source = c:MyAccessDB.mdb");
            OleDbDataAdapter MyAdapter = new OleDbDataAdapter("SELECT Column1, Column2, Column3 FROM MyTable", MyConnection);
            DataSet MyDataSet = new DataSet();

            MyAdapter.Fill(MyDataSet, "MyTable");
            MyDataSet.Tables[0].Rows[3]["Column3"] = "Test";

            OleDbCommandBuilder MyBuilder = new OleDbCommandBuilder(MyAdapter);

            MyAdapter.Update(MyDataSet.Tables[0]);
        }
    }
}



           
          

   


/*
 * C# Programmers Pocket Consultant
 * Author: Gregory S. MacBeth
 * Email: gmacbeth@comporium.net
 * Create Date: June 27, 2003
 * Last Modified Date:
 * Version: 1
 */
using System;
using System.Data;
using System.Data.Common;
using System.Data.SqlClient;

namespace Client.Chapter_13___ADO.NET
{
    public class UsingDataTableMappings
    {
        static void Main(string[] args)
        {
            SqlConnection SConn = new SqlConnection("Data Source=(local); Initial Catalog = CaseManager; Integrated Security=true");
            SqlDataAdapter da = new SqlDataAdapter("SELECT ID, Contact, Email FROM CaseInfo", SConn);
            DataSet ds = new DataSet();
            DataTableMapping custMap = da.TableMappings.Add("CaseInfo", "MyDatabase");
            custMap.ColumnMappings.Add("ID", "CaseNumber");
            custMap.ColumnMappings.Add("Contact", "MyContact");
            custMap.ColumnMappings.Add("Email", "Email Address");
            da.Fill(ds);
        }
    }
}
           
          

/*
* C# Programmers Pocket Consultant
* Author: Gregory S. MacBeth
* Email: gmacbeth@comporium.net
* Create Date: June 27, 2003
* Last Modified Date:
* Version: 1
*/
using System;
using System.Data;
using System.Data.SqlClient;

namespace Client.Chapter_13___ADO.NET
{
public class CreatingDataTablesandPopulatingThem
{
static void Main(string[] args)
{
SqlConnection MyConnection = new SqlConnection(@”Data Source=(local); Initial Catalog = CaseManager; Integrated Security=true”);
SqlDataAdapter MyAdapter = new SqlDataAdapter(“SELECT * FROM CaseInfo”, MyConnection);
DataSet MyDataSet = new DataSet();

//Create a new DataTable
DataTable MyTable2 = MyDataSet.Tables.Add(“My2ndTable”);

//Adding Columns and Rows
DataColumn myColumn = new DataColumn();

myColumn.DataType = System.Type.GetType(“System.Decimal”);
myColumn.AllowDBNull = false;
myColumn.Caption = “Price”;
myColumn.ColumnName = “Price”;
myColumn.DefaultValue = 25;

// Add the column to the table.
MyTable2.Columns.Add(myColumn);

// Add 10 rows and set values.
DataRow myRow;

for (int i = 0; i < 10; i++) { myRow = MyTable2.NewRow(); myRow[0] = i + 1; // Be sure to add the new row to the DataRowCollection. MyTable2.Rows.Add(myRow); } SqlCommandBuilder Builder = new SqlCommandBuilder(MyAdapter); MyAdapter.Update(MyDataSet, "My2ndTable"); } } } [/csharp]