BindingNavigator events

Question

Hi

Relatively new to C#.

I have added a BindingNavigator in code using:

		private readonly BindingNavigator BN = new(true);

Everything works fine and all the common BindingNavigator controls function correctly.

I added it in code, and set a few Properties then adding to the Form control collection.

Now I need to access one of those common controls - the 'delete item' one - so I can add code to verify the user really want to delete the record.

So, how do I find the event names and signatures so I can add a handler?

Answer 1

How about cloning the DeleteButton?

using System;
using System.Data;
using System.Drawing;
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
        };

        using (ToolStripButton deleteButton = (ToolStripButton)bindingNavigator.DeleteItem) {
            bindingNavigator.Items.Remove(deleteButton);
            ToolStripButton newDeleteItem = CloneToolStripButton(deleteButton);
            newDeleteItem.Click += DeleteButton_Click;
            bindingNavigator.Items.Add(newDeleteItem);
        }

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

    static ToolStripButton CloneToolStripButton(ToolStripButton oldButton) {
        var newButton = new ToolStripButton {
            Name = oldButton.Name,
            Text = oldButton.Text,
            Image = new Bitmap(oldButton.Image),
            RightToLeftAutoMirrorImage = oldButton.RightToLeftAutoMirrorImage,
            DisplayStyle = oldButton.DisplayStyle
        };
        return newButton;
    }

    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();
            }
        }
    }
}

Answer 2

Check out my BindingNavigator repository which demonstrates how to prompt yes/no before removing a record. A custom dialog is used that set the default button to no.