Topic: DoubleClick Event for the ComboBox Control.

[Kerry]

While doing some research for this ; Using a Palette for testing Routines.
http://www.theswamp.org/index.php?PHPSESSID=2g7tgnalp0qkm01kumcc1odt32&topic=20868.0

I realised that the DoubleClick Event does not fire for the ComboBox Control.

This workaround is worth posting for posterity ..

If the code is not self explanatory, just yell

The solution is attached.
This is the FormCode  ComboTestForm1.cs

// CodeHimBelongaKwb ©  Jan 2008

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


namespace Combo_1
{
    public partial class ComboTestForm1 : Form
    {
        public ComboTestForm1()
        {
            InitializeComponent();
        }
        // Create a new dictionary of Description strings,
        // with 'Command' string keys.
        //
        public Dictionary<string, string> commandStuff =
            new Dictionary<string, string>();

        private void Form1_Load(object sender, EventArgs e)
        {           
            commandStuff.Add("Command_B1",
                "Command_B1 : Brief Description goes here.");
            commandStuff.Add("Command_B2",
                "Command_B2 : Brief Description goes here.");
            commandStuff.Add("Command_B3",
                "Command_B3 : Brief Description goes here.");
            commandStuff.Add("Command_C4",
                "Command_C4 : Brief Description goes here.");
            commandStuff.Add("Command_C5",
                "Command_C5 : Brief Description goes here.");

            this.textBox1.Text = "Select a Command Name from ComboBox";

            foreach (KeyValuePair<string, string> kvp in commandStuff)
            {
                this.comboBox1.Items.Add(kvp.Key);                   
            }
        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            this.textBox1.Text = commandStuff[comboBox1.SelectedItem.ToString()];
            this.textBox2.Clear();
        }

        //  Record the last click as now
        DateTime lastClick = DateTime.Now;
        // This is a hack to allow the Combo Double click to be identified.
        // Set the Combo MouseClick Event to call this when fired.
        private void ComboBox1_MouseClick(object sender, MouseEventArgs e)
        {
            //  Test if in the last time plus the milliseconds it takes for a double click
            //  if the differentiation is less than (SystemInformation.DoubleClickTime)
            //  activate the code, as there was a double click.
            if ((DateTime.Now < lastClick.AddMilliseconds(SystemInformation.DoubleClickTime)))
            {
                this.textBox2.Text = comboBox1.SelectedItem.ToString(); 
            }
            //  Record the last click as now again
            lastClick = DateTime.Now;
        }

        // THIS IS REDUNDANT !!
        //
        private void comboBox1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            this.textBox2.Text = comboBox1.SelectedItem.ToString();           
        }
        //
        private void comboBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == (char)Keys.Enter | e.KeyChar == (char)Keys.Space)
            {
                this.textBox2.Text = comboBox1.SelectedItem.ToString();
                e.Handled = true;
            }             
        }
    }
}