how to add check box all into DataGrid view in win form?

Question

Hi evet Microsoft users.

I have a code that put a checkbox all control above a DataGrid view that user can check it and all rows will be check.

Now my problem is that in every form I should copy and paste this code and it gets make a lot time.

is there any way to make a DataGrid view in each form get inheritance form this code?

private CheckBox headerCheckBox = new CheckBox();

        private void GetDG_Joint()
        {    

            //Find the Location of Header Cell.
            Point headerCellLocation = DG_Joint.GetCellDisplayRectangle(0, -1, true).Location;

            //Place the Header CheckBox in the Location of the Header Cell.
            headerCheckBox.Location = new Point(headerCellLocation.X + 5, headerCellLocation.Y + 5);
            headerCheckBox.BackColor = Color.Transparent;
            headerCheckBox.Size = new Size(18, 18);

            //Assign Click event to the Header CheckBox.
            headerCheckBox.Click += new EventHandler(HeaderCheckBox_Clicked);
            DG_Joint.Controls.Add(headerCheckBox);

            //Add a CheckBox Column to the DataGridView at the first position.
            DataGridViewCheckBoxColumn checkBoxColumn = new DataGridViewCheckBoxColumn();
            checkBoxColumn.HeaderText = "";
            checkBoxColumn.Width = 30;
            checkBoxColumn.Name = "checkBoxColumn";
            checkBoxColumn.FalseValue = 0;
            checkBoxColumn.TrueValue = 1;
            if (!DG_Joint.Columns.Contains("checkBoxColumn"))
                DG_Joint.Columns.Insert(0, checkBoxColumn);

            //Assign Click event to the DataGridView Cell.
            DG_Joint.CellContentClick += new DataGridViewCellEventHandler(DataGridView_CellClick);

        }

        private void HeaderCheckBox_Clicked(object sender, EventArgs e)
        {
            //Necessary to end the edit mode of the Cell.

            DG_Joint.EndEdit();

            //Loop and check and uncheck all row CheckBoxes based on Header Cell CheckBox.
            foreach (DataGridViewRow row in DG_Joint.Rows)
            {
                DataGridViewCheckBoxCell checkBox = ((DataGridViewCheckBoxCell)row.Cells["checkBoxColumn"]);
                checkBox.Value = headerCheckBox.Checked;
            }
        }
        private void DataGridView_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            //Check to ensure that the row CheckBox is clicked.
            if (e.RowIndex >= 0 && e.ColumnIndex == 0)
            {
                //Loop to verify whether all row CheckBoxes are checked or not.
                bool isChecked = true;
                foreach (DataGridViewRow row in DG_Joint.Rows)
                {
                    if (Convert.ToBoolean(row.Cells["checkBoxColumn"].EditedFormattedValue) == false)
                    {
                        isChecked = false;
                        break;
                    }
                }
                headerCheckBox.Checked = isChecked;
            }
        }
        ```

Answer 1

Hi @Farshad Valizade , Welcome to Microsoft Q&A,

Your idea is perfectly viable, just create a custom DataGridView with this method.

Similar code is as follows:

using System;
using System.Drawing;
using System.Windows.Forms;

namespace _11_15_x
{
    public partial class Customdata : DataGridView
    {
        protected CheckBox headerCheckBox = new CheckBox();
        public Customdata()
        {
            InitializeComponent();
            // Your existing code for initializing the DataGridView
            // Place the Header CheckBox bellows the bottom-right corner of the DataGridView Header.
            headerCheckBox.Location = new Point(this.Width - 18, this.Height - 18);
            headerCheckBox.BackColor = Color.Transparent;
            headerCheckBox.Size = new Size(18, 18);

            // Assign Click event to the Header CheckBox.
            headerCheckBox.Click += new EventHandler(HeaderCheckBox_Clicked);
            this.Controls.Add(headerCheckBox);

            // Add a CheckBox Column to the DataGridView at the first position.
            DataGridViewCheckBoxColumn checkBoxColumn = new DataGridViewCheckBoxColumn();
            checkBoxColumn.HeaderText = "";
            checkBoxColumn.Width = 30;
            checkBoxColumn.Name = "checkBoxColumn";
            checkBoxColumn.FalseValue = 0;
            checkBoxColumn.TrueValue = 1;
            if (!this.Columns.Contains("checkBoxColumn"))
                this.Columns.Insert(0, checkBoxColumn);

            // Assign Click event to the DataGridView Cell.
            this.CellContentClick += new DataGridViewCellEventHandler(DataGridView_CellClick);
        }
        protected void HeaderCheckBox_Clicked(object sender, EventArgs e)
        {
            // Your existing code for handling header checkbox click
        }

        protected void DataGridView_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            // Your existing code for handling cell click
        }
        protected override void OnPaint(PaintEventArgs pe)
        {
            base.OnPaint(pe);
        }
    }
}

Best Regards,

Jiale

---

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Answer 2

It is also interesting to add columns on the form side.

using System;
using System.Collections.Generic;
using System.Windows.Forms;

public class CustomForm : Form
{
    private readonly List<DataGridViewExtender> dataGridViewExtenders 
                                = new List<DataGridViewExtender>();

    protected override void OnLoad(EventArgs e) {
        base.OnLoad(e);
        foreach (var dgv in GetAllControlOfType<DataGridView>(this)) {
            dataGridViewExtenders.Add(new DataGridViewExtender(dgv));
        }
    }

    private IEnumerable<T> GetAllControlOfType<T>(Control ctrl)
        where T : Control {
        if (ctrl is T target) {
            yield return target;
        } else {
            if (ctrl.HasChildren) {
                foreach (Control child in ctrl.Controls) {
                    foreach (var dgv in GetAllControlOfType<T>(child)) {
                        yield return dgv;
                    }
                }
            }
        }
    }

    private class DataGridViewExtender
    {
        private readonly CheckBox headerCheckBox = new CheckBox();
        private readonly DataGridView DG_Joint;

        public DataGridViewExtender(DataGridView dgv) {
            DG_Joint = dgv;
            GetDG_Joint();
        }

        private void GetDG_Joint() {
            // Your existing code
        }

        private void HeaderCheckBox_Clicked(object sender, EventArgs e) {
            // Your existing code
        }

        private void DataGridView_CellClick(object sender, DataGridViewCellEventArgs e) {
            // Your existing code
        }
    }
}

Answer 3

tnx to all of you but I don't want to add new dg to designer and add it to the form.

I just want to add a checkboz all to existing dgv because I have used advanced datagrdivew component in my form and I can't remove it and use new dgv.

Answer 4

See the following article with source code.