File: Form1.cs[Design]



File: Form1.cs ->

using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using System.Windows.Controls.Primitives;
using System.Windows.Controls;

namespace DataGridPopup
{
    public partial class Form1 : Form
    {

//Members for Popup declared here so that only one instance is managed for the popup //at a time.
        Popup codePopup = new Popup();
        TextBlock popupText = new TextBlock();

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            ArrayList arrSrc = new ArrayList();

             try
            {
//Binding Datagrid with data:
                arrSrc.Add(new DataSourceDatagrid("SAN", "Pune"));
                arrSrc.Add(new DataSourceDatagrid("Dipak", "Mumbai"));
                arrSrc.Add(new DataSourceDatagrid("Kiran", "Delhi"));
                arrSrc.Add(new DataSourceDatagrid("SAN1", "Pune1"));
                arrSrc.Add(new DataSourceDatagrid("Dipak1", "Mumbai1"));
                arrSrc.Add(new DataSourceDatagrid("Kiran1", "Delhi1"));
                arrSrc.Add(new DataSourceDatagrid("SAN2", "Pune2"));
                arrSrc.Add(new DataSourceDatagrid("Dipak2", "Mumbai2"));
                arrSrc.Add(new DataSourceDatagrid("Kiran2", "Delhi2"));

                dataGridView1.DataSource = arrSrc;
            }
            catch (Exception ex)
            {
                ex = new Exception("Error occurred while binding the datasource to datagrid.  
                                     " + ex.Message);

                throw ex;
            }
        }

        private void dataGridView1_CellMouseEnter(object sender, DataGridViewCellEventArgs e)
        {
            try
            {

//Additional Check: to see if there is a valid row-column cell for the datagrid on each mouse over event:
                if (e.RowIndex >= 0 && e.RowIndex < dataGridView1.RowCount
                    && e.ColumnIndex >= 0 && e.ColumnIndex < dataGridView1.ColumnCount)
                {
                    codePopup.Visibility = System.Windows.Visibility.Hidden;
                    codePopup.IsOpen = false;
                    popupText.Text = "Information: "
                                    + System.Environment.NewLine
                                    + "Name: " + dataGridView1[0, e.RowIndex].Value.ToString()
                                    + System.Environment.NewLine
                                    + "Address: " + dataGridView1[1, e.RowIndex].Value.ToString();
                    popupText.Background = System.Windows.Media.Brushes.LightBlue;
                    popupText.Foreground = System.Windows.Media.Brushes.Blue;
                    codePopup.Child = popupText;

                    codePopup.Placement = System.Windows.Controls.Primitives.PlacementMode.MousePoint;
                    codePopup.Height = 50;
                    codePopup.Width = 100;
                    codePopup.IsOpen = true;
                }
            }
            catch (Exception ex)
            {
                ex = new Exception("Error occurred while displaying the popup for datagrid cell. " +
ex.Message);
                throw ex;
            }
        }

        private void dataGridView1_CellMouseLeave(object sender, DataGridViewCellEventArgs e)
        {
            try
            {
                codePopup.IsOpen = false;
            }
            catch (Exception ex)
            {
                ex = new Exception("Error occurred while hiding the popup for datagrid cell. " +
ex.Message);

                throw ex;
            }
        }
    }
}

File: DataSourceDatagrid.cs ->

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace DataGridPopup
{
    public class DataSourceDatagrid
    {
        private string userName = string.Empty;
        private string address = string.Empty;

        public string UserName
        {
            get
            {
                return this.userName;
            }
            set
            {
                this.userName = value;
            }
        }
        public string Address
        {
            get
            {
                return this.address;
            }
            set
            {
                this.address = value;
            }
        }