Author: coder

causes the the child rows to be nested within the parent rows in the output XML

Posted on by coder 
   
 

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

class NestedXml {
    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 " +
          "FROM Customers " +
          "ORDER BY CustomerID;" +
          "SELECT OrderID, CustomerID, ShipCountry " +
          "FROM Orders " +
          "WHERE CustomerID IN (" +
          "  SELECT TOP 2 CustomerID " +
          "  FROM Customers " +
          "  ORDER BY CustomerID " +
          ")";
        SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
        mySqlDataAdapter.SelectCommand = mySqlCommand;
        DataSet myDataSet = new DataSet();
        mySqlConnection.Open();
        int numberOfRows = mySqlDataAdapter.Fill(myDataSet);
        Console.WriteLine("numberOfRows = " + numberOfRows);
        mySqlConnection.Close();
        DataTable customersDT = myDataSet.Tables["Table"];
        DataTable ordersDT = myDataSet.Tables["Table1"];
        DataRelation customersOrdersDataRel =
          new DataRelation(
            "CustomersOrders",
            customersDT.Columns["CustomerID"],
            ordersDT.Columns["CustomerID"]
          );
        myDataSet.Relations.Add(
          customersOrdersDataRel
        );
        myDataSet.WriteXml("nonNestedXmlFile.xml");
        myDataSet.Relations["CustomersOrders"].Nested = true;
        myDataSet.WriteXml("nestedXmlFile.xml");
    }
}

Obtain an XML Document from a SQL Server Query

Posted on by coder

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]

Fill data in DateSet to XmlDocument

Posted on by coder 
   
 

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);
    }
}

Update Data Using Sql Statements 2

Posted on by coder 
   


/*
 * 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 = &#039;Lee&#039;";
            SqlCommand MyCmd = new SqlCommand(MyString, MyConnection);

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

Update Data Using Commond Builder

Posted on by coder 
   


/*
 * 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);
        }
    }
}

Update A DataSource

Posted on by coder 
   

/*
 * 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]);
        }
    }
}

Using Data Table Mappings

Posted on by coder 
   


/*
 * 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);
        }
    }
}