changing values of other cells as soon as when a checkbox cell is ticked or unticked in a grid in c#

Hello ,
If I understand the question correct,
when you check one of the checkBox the other checkBox
in the same DataGridView row should be unchecked.
For that you need the number of Row and Column where is the user
unchecked or checked the checkBox.
If it is the right checkBox the other should be easy to uncheck or check.

So,
all you need is to (create code for..)
process the event called CellContentClick when you will find the
number of Row and Column of the cell in
the DataGridView in wich the user have checked the checkBox.
Afther that you will easy uncheck or check all the other cells in the same row.

Example :

Create DataGridView1 with 3 columns and maximum 10 Rows,
first column initial state is checked and all the other are unchecked.
When you uncheck first column checkBox the other change state to checked,
and when you check first column checkBox the other change state to unchecked.

Program.cs

/*
 * Created by SharpDevelop.
 * User: Perić Željko
 * Date: 7.10.2011
 * Time: 12:04
 * 
 */
using System;
using System.Windows.Forms;
namespace Data_grid_view_example
{
	/// <summary>
	/// Class with program entry point.
	/// </summary>
	internal sealed class Program
	{
		/// <summary>
		/// Program entry point.
		/// </summary>
		[STAThread]
		private static void Main(string[] args)
		{
			Application.EnableVisualStyles();
			Application.SetCompatibleTextRenderingDefault(false);
			Application.Run(new MainForm());
		}
		
	}
}

MainForm.cs

/*
 * Created by SharpDevelop.
 * User: Perić Željko
 * Date: 7.10.2011
 * Time: 12:04
 * 
 */
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
namespace Data_grid_view_example
{
	/// <summary>
	/// Description of MainForm.
	/// </summary>
	public partial class MainForm : Form
	{
		public MainForm()
		{
			//
			// The InitializeComponent() call is required for Windows Forms designer support.
			//
			InitializeComponent();
			
			//
			// Call sub for seting initial 
			// values for checkBox in all DataGridView
			//
			
				DataGridView1SetValue();
			
		}
		
		void DataGridView1SetValue()
		{
			//
			// Set initial values for checkBox in all DataGridView
			//
			int Row = 0;
			int Column = 0;
			
			//
			// Set number of rows to 10
			//
			dataGridView1.RowCount = 10;
			
			//
			// Set value of checkBox in first column to true (checked)
			//
			while (Row < 10)
			{
				dataGridView1[Column,Row].Value = true;
				dataGridView1[Column+1,Row].Value = false;
				dataGridView1[Column+2,Row].Value = false;
				Row = Row + 1;
			}
			dataGridView1.Refresh();
		}
		
		
		void DataGridView1CellContentClick(object sender, DataGridViewCellEventArgs e)
		{
			int Row = 0;
			int Column = 0;
			string state = " ";
			//
			// Get  the number of Row and Column
			//
			Row = dataGridView1.CurrentRow.Index;
			Column = dataGridView1.CurrentCell.ColumnIndex;
			
			//
			// If the checkBox in first Column is checked
			// 		then uncheck all the other
			// and if the checkBox in first column is unchecked,
			// 		check all the other
			//
			if (Column == 0)
			{
				state = dataGridView1[Column,Row].Value.ToString();
				if (state == "True") 
				{
					dataGridView1[Column,Row].Value = false;
					dataGridView1[Column+1,Row].Value = true;
					dataGridView1[Column+2,Row].Value = true;
				}
				else
				{
					dataGridView1[Column,Row].Value = true;
					dataGridView1[Column+1,Row].Value = false;
					dataGridView1[Column+2,Row].Value = false;
				}
			}
			dataGridView1.Refresh();
		}
		
	}
}

MainForm.Designer.cs

/*
 * Created by SharpDevelop.
 * User: Perić Željko
 * Date: 7.10.2011
 * Time: 12:04
 * 
 */
namespace Data_grid_view_example
{
	partial class MainForm
	{
		/// <summary>
		/// Designer variable used to keep track of non-visual components.
		/// </summary>
		private System.ComponentModel.IContainer components = null;
		
		/// <summary>
		/// Disposes resources used by the form.
		/// </summary>
		/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
		protected override void Dispose(bool disposing)
		{
			if (disposing) {
				if (components != null) {
					components.Dispose();
				}
			}
			base.Dispose(disposing);
		}
		
		/// <summary>
		/// This method is required for Windows Forms designer support.
		/// Do not change the method contents inside the source code editor. The Forms designer might
		/// not be able to load this method if it was changed manually.
		/// </summary>
		private void InitializeComponent()
		{
			System.Windows.Forms.DataGridViewCellStyle dataGridViewCellStyle1 = new System.Windows.Forms.DataGridViewCellStyle();
			this.dataGridView1 = new System.Windows.Forms.DataGridView();
			this.Column1 = new System.Windows.Forms.DataGridViewCheckBoxColumn();
			this.Column2 = new System.Windows.Forms.DataGridViewCheckBoxColumn();
			this.Column3 = new System.Windows.Forms.DataGridViewCheckBoxColumn();
			((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).BeginInit();
			this.SuspendLayout();
			// 
			// dataGridView1
			// 
			this.dataGridView1.AllowUserToAddRows = false;
			this.dataGridView1.AllowUserToDeleteRows = false;
			this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
			this.dataGridView1.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
									this.Column1,
									this.Column2,
									this.Column3});
			this.dataGridView1.Location = new System.Drawing.Point(10, 23);
			this.dataGridView1.Name = "dataGridView1";
			this.dataGridView1.Size = new System.Drawing.Size(344, 322);
			this.dataGridView1.TabIndex = 0;
			this.dataGridView1.CellContentClick += new System.Windows.Forms.DataGridViewCellEventHandler(this.DataGridView1CellContentClick);
			// 
			// Column1
			// 
			dataGridViewCellStyle1.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleCenter;
			dataGridViewCellStyle1.NullValue = "False";
			this.Column1.DefaultCellStyle = dataGridViewCellStyle1;
			this.Column1.HeaderText = "Column1";
			this.Column1.Name = "Column1";
			this.Column1.Resizable = System.Windows.Forms.DataGridViewTriState.True;
			this.Column1.SortMode = System.Windows.Forms.DataGridViewColumnSortMode.Automatic;
			this.Column1.Width = 101;
			// 
			// Column2
			// 
			this.Column2.HeaderText = "Column2";
			this.Column2.Name = "Column2";
			this.Column2.Resizable = System.Windows.Forms.DataGridViewTriState.True;
			this.Column2.SortMode = System.Windows.Forms.DataGridViewColumnSortMode.Automatic;
			// 
			// Column3
			// 
			this.Column3.HeaderText = "Column3";
			this.Column3.Name = "Column3";
			this.Column3.Resizable = System.Windows.Forms.DataGridViewTriState.True;
			this.Column3.SortMode = System.Windows.Forms.DataGridViewColumnSortMode.Automatic;
			// 
			// MainForm
			// 
			this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
			this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
			this.ClientSize = new System.Drawing.Size(455, 489);
			this.Controls.Add(this.dataGridView1);
			this.Name = "MainForm";
			this.Text = "Data grid view example";
			((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).EndInit();
			this.ResumeLayout(false);
		}
		private System.Windows.Forms.DataGridViewCheckBoxColumn Column3;
		private System.Windows.Forms.DataGridViewCheckBoxColumn Column2;
		private System.Windows.Forms.DataGridViewCheckBoxColumn Column1;
		public System.Windows.Forms.DataGridView dataGridView1;
	}
}

All the best
Perić Željko

Try this one.

CheckBox chk;
CheckBox chk2;
foreach(GridViewRow row in GridView1.Rows)
{
   chk = (CheckBox)row.Cells[0].FindControl("chkBox");
   if(chk.Checked == true)
   {
      foreach(GridViewRow row2 in GridView1.Rows)
      {
         chk2 = (CheckBox)row.Cells[0].FindControl("chkBox");
         if(row2.RowIndex != row.RowIndex)
         {
            chk2.Checked == false;
         }
      }
   }
}

Hope it helps!

Regards,
Eduard

Dear Madhu,

When you are ticking the checkbox cell in the grid then found the row of which the checkbox is checked by applying a foreach loop on the grid and then found other controls in the row and assign them the appropriate value.



Thanks

Varun Sareen