BindingNavigator events

This might be better.

using System;
using System.Data;
using System.Windows.Forms;

public partial class Form1 : Form
{
    private readonly DataGridView dataGridView;
    private readonly BindingSource bindingSource;
    private readonly BindingNavigator bindingNavigator;
    private readonly DataTable dataTable;

    public Form1() {
        InitializeComponent();

        dataTable = new DataTable();
        dataTable.Columns.Add("ID", typeof(int));
        dataTable.Columns.Add("Name", typeof(string));

        dataTable.Rows.Add(1, "Alice");
        dataTable.Rows.Add(2, "Bob");
        dataTable.Rows.Add(3, "Charlie");

        bindingSource = new BindingSource {
            DataSource = dataTable
        };

        dataGridView = new DataGridView {
            Dock = DockStyle.Fill,
            DataSource = bindingSource
        };

        bindingNavigator = new BindingNavigator(true) {
            Dock = DockStyle.Top,
            BindingSource = bindingSource
        };

        var deleteButton = bindingNavigator.DeleteItem;
        bindingNavigator.DeleteItem = null;
        deleteButton.Click += DeleteButton_Click;
        bindingNavigator.Items.Add(deleteButton);

        Controls.Add(dataGridView);
        Controls.Add(bindingNavigator);
    }

    private void DeleteButton_Click(object sender, EventArgs e) {
        if (bindingNavigator.Validate()) {
            var result = MessageBox.Show("Do you want to delete it?",
                                         "Question",
                                         MessageBoxButtons.YesNo);
            if (result == DialogResult.Yes) {
                bindingSource.RemoveCurrent();
                bindingNavigator.Refresh();
            }
        }
    }
}

Hi @KOZ6.0

Thanks for your response. I have tried in my project, and although the project runs OK, the "deleteButton.Click += DeleteButton_Click;" doesn't work and produces a "CS8622 - Nullability of reference types in type of parameter doesn't match the target delegate (possibly because of nullability attributes)."

Although this doesn't prevent the code running, the event handler for the button is never reached.

private void DeleteButton_Click(object sender, EventArgs e)

This is the .NET Framework way of writing.

If you are using .NET Core, NET5.0 or later, please rewrite it as follows.

private void DeleteButton_Click(object? sender, EventArgs e)

You can suppress the message with:

#nullable disable

    public partial class Form1 : Form

Hi

Thanks. (code blocks below are not responding to Language clicks)

In the meantime, I have tried out another approach which seems to be working so far - limited testing as yet.

All I did was:

add a handler for the BindingNavigator in the Form Load event

			BN.ItemClicked += DeleteItem_Click;

and the code:

		private void DeleteItem_Click(object? sender, ToolStripItemClickedEventArgs e)
		{
			BN.DeleteItem = null;

			string? s = e.ClickedItem?.Text;

			if (string.IsNullOrEmpty(s))
			{
				return;
			}

			switch (s)
			{
				case "Delete":
					DialogResult result = MessageBox.Show("Are you sure you want to delete this item?", "Confirm Deletion", MessageBoxButtons.YesNo, MessageBoxIcon.Question);

					if (result == DialogResult.Yes)
					{
						DeleteCurrentItem();
					}
					break;

					// Add other button clicks here, e.g.
					// case "MoveNext":
					// case "MoveLast":
					// case "MoveFirst":

			}
		}

		private void DeleteCurrentItem()
		{
			// Check if there is a current item to delete
			if (BS.Current != null)
			{
				BS.RemoveCurrent();
			}
		}

Try this code

    private string deleteItemName;

    private void Form1_Load(object sender, EventArgs e) {
        BN.ItemClicked += BindingNavigator_ItemClicked;
        var deleteButton = BN.DeleteItem!;
        BN.DeleteItem = null;
        BN.Items.Add(deleteButton);
        deleteItemName = deleteButton.Name!;
    }

    private void BindingNavigator_ItemClicked(object? sender, ToolStripItemClickedEventArgs e) {
        var itemName = e.ClickedItem!.Name!;
        if (itemName == deleteItemName) {
            DialogResult result = MessageBox.Show("Are you sure you want to delete this item?", "Confirm Deletion", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
            if (result == DialogResult.Yes) {
                DeleteCurrentItem();
            }
        }
    }

Hi Karen

Thanks for your response. What I read at the link you posted is somewhat beyond my level of understanding. My original question was about finding out how to add event handlers for the Navigator added at run time (not a component available from the toolbox). I added it at run time but was then stumped as to how to add handlers (including signatures) for the events I needed - you correctly addressed the confirmation dialog on record delete.

The code I managed to cobble together (as posted above) seems to do the job, so far at least. I am sure that the code from @KOZ6.0 and at your link are both likely to be more robust than mine, but unless my code falls apart, I will stick with it.

Thanks both for your help and although I did not end up using your code, I did learn from your posts.

Hi @Slartibartfast ,The Q&A platform cannot delete cases at will. I have converted your solution into an answer. You can mark it to end this thread.