Save data in DataGrid into XML file

   

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Xml;

public class Form1 : System.Windows.Forms.Form {
   private System.Windows.Forms.Button btnReadXml;
   private System.Windows.Forms.Button btnWriteXml;
   private System.Windows.Forms.Button btnConfigXml;
   private System.Windows.Forms.DataGrid dataGrid1;
   private System.ComponentModel.Container components = null;

   public Form1() {
      InitializeComponent();
   }

   private void InitializeComponent() {
      this.btnReadXml = new System.Windows.Forms.Button();
      this.btnWriteXml = new System.Windows.Forms.Button();
      this.btnConfigXml = new System.Windows.Forms.Button();
      this.dataGrid1 = new System.Windows.Forms.DataGrid();
      ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
      this.SuspendLayout();

      this.btnReadXml.Location = new System.Drawing.Point(8, 8);
      this.btnReadXml.Name = "btnReadXml";
      this.btnReadXml.TabIndex = 0;
      this.btnReadXml.Text = "Read XML";
      this.btnReadXml.Click += new System.EventHandler(this.btnReadXml_Click);

      this.btnWriteXml.Location = new System.Drawing.Point(8, 48);
      this.btnWriteXml.Name = "btnWriteXml";
      this.btnWriteXml.TabIndex = 1;
      this.btnWriteXml.Text = "Write XML";
      this.btnWriteXml.Click += new System.EventHandler(this.btnWriteXml_Click);

      this.btnConfigXml.Location = new System.Drawing.Point(8, 88);
      this.btnConfigXml.Name = "btnConfigXml";
      this.btnConfigXml.TabIndex = 2;
      this.btnConfigXml.Text = "Config";
      this.btnConfigXml.Click += new System.EventHandler(this.btnConfigXml_Click);

      this.dataGrid1.DataMember = "";
      this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
      this.dataGrid1.Location = new System.Drawing.Point(104, 8);
      this.dataGrid1.Name = "dataGrid1";
      this.dataGrid1.Size = new System.Drawing.Size(184, 192);
      this.dataGrid1.TabIndex = 3;

      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 272);
      this.Controls.Add(this.dataGrid1);
      this.Controls.Add(this.btnConfigXml);
      this.Controls.Add(this.btnWriteXml);
      this.Controls.Add(this.btnReadXml);
      this.Name = "Form1";
      this.Text = "XML Demo";
      ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
      this.ResumeLayout(false);
   }

   static void Main() {
      Application.Run(new Form1());
   }

   private void btnReadXml_Click(object sender, System.EventArgs e) {
      DataSet ds = new DataSet();
      ds.ReadXml("Employee.xml",XmlReadMode.InferSchema);
      dataGrid1.SetDataBinding(ds, "Employee");
   }

   private void btnWriteXml_Click(object sender, System.EventArgs e) {
      DataSet ds = (DataSet) dataGrid1.DataSource;
      ds.WriteXml("XMLFileOut.xml",XmlWriteMode.IgnoreSchema);    
   }

   private void btnConfigXml_Click(object sender, System.EventArgs e) {
      string connString = @"server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
      SqlConnection conn = new SqlConnection(connString);

      SqlCommand cmd = new SqlCommand();
      cmd.Connection = conn;
      cmd.CommandText = @"select id,lastname from employee for xml auto";

      try {
         conn.Open();
         XmlReader xmlrdr = cmd.ExecuteXmlReader();
         DataSet ds = new DataSet();
         ds.ReadXml(xmlrdr,XmlReadMode.InferSchema);
         dataGrid1.DataSource=ds;
      } catch (SqlException ex) {
         MessageBox.Show (ex.Message);
      } finally  {
         conn.Close();
      }
  }
}


/* File: Employee.xml
<?xml version="1.0" standalone="yes"?>
<NewDataSet>
  <employee id="1" lastname="Yin       ">
  </employee>
</NewDataSet>

*/