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MyMessageBox.cs
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MyMessageBox.cs
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/**************************************************************************************
File name: MyMessageBox.cs
Purpose: 1. Mimics the functionality of the MessageBox class including the form format
and resizing in relation to message contents, title, and number of buttons
2. Added the functionality of stating the parent form so the message box
appears over the parent application instead of the middle of the screen
- the built-in MessageBox has this function however it doesn't work as
Microsoft overrides it and always puts the box in the middle of the screen
Version: 1.0.0
Author: ┬ ┬ ┬┬┌─┌─┐┬ ┬┌─┐╦╔╦╗
│ │ │├┴┐├┤ │││├─┤║ ║
┴─┘└─┘┴ ┴└─┘└┴┘┴ ┴╩ ╩
Date: February 14, 2023
License: MIT License
GitHub Repository: https://github.com/LukeWait/my-messagebox
**************************************************************************************/
using System;
using System.Drawing;
using System.Windows.Forms;
namespace CustomMessageBox
{
public static class MyMessageBox
{
/****************************************************************************
Method: Show() --- parameterised contructor method
Purpose: Creates a MessageBox to display passed in data
Input: Form parentForm --- Form that the message box is being called from
string message --- message to display
string title --- text to display in title bar
MessageBoxButtons buttons --- the combination of buttons required
MessageBoxIcon icon --- the icon to be displayed in the message box
Output: Constructor method/no return type
****************************************************************************/
public static DialogResult Show(Form parentForm, string message, string title, MessageBoxButtons buttons, MessageBoxIcon icon)
{
// calculate the position of the message box relative to the parent form
int x = parentForm.Left + (parentForm.Width - 250) / 2;
int y = parentForm.Top + (parentForm.Height - 250) / 2;
// create the message box form
Form messageBox = new Form();
messageBox.StartPosition = FormStartPosition.Manual;
messageBox.Location = new Point(x, y);
messageBox.FormBorderStyle = FormBorderStyle.FixedDialog;
messageBox.MaximizeBox = false;
messageBox.MinimizeBox = false;
messageBox.ShowInTaskbar = false;
messageBox.SizeGripStyle = SizeGripStyle.Hide;
messageBox.Text = title;
// create the details panel
Panel bodyPanel = new Panel();
bodyPanel.Dock = DockStyle.Top;
bodyPanel.BackColor = Color.White;
messageBox.Controls.Add(bodyPanel);
// create the button panel
Panel footerPanel = new Panel();
footerPanel.Height = 49;
footerPanel.Dock = DockStyle.Bottom;
footerPanel.BackColor = Color.CornflowerBlue;
messageBox.Controls.Add(footerPanel);
// create the icon
PictureBox iconBox = new PictureBox();
iconBox.Location = new Point(20, 20);
iconBox.Size = new Size(32, 32);
iconBox.SizeMode = PictureBoxSizeMode.StretchImage;
switch (icon)
{
case MessageBoxIcon.Error:
iconBox.Image = SystemIcons.Error.ToBitmap();
break;
case MessageBoxIcon.Information:
iconBox.Image = SystemIcons.Information.ToBitmap();
break;
case MessageBoxIcon.Question:
iconBox.Image = SystemIcons.Question.ToBitmap();
break;
case MessageBoxIcon.Warning:
iconBox.Image = SystemIcons.Warning.ToBitmap();
break;
default:
iconBox.Image = null;
break;
}
// create the message box text
Label messageLabel = new Label();
messageLabel.AutoSize = true;
messageLabel.Location = new Point(52, 18);
messageLabel.Text = message;
messageLabel.MaximumSize = new Size(250, 800);
messageLabel.Padding = new Padding(10);
messageLabel.Font = new Font("Microsoft Sans Serif", 8);
// add the details to the body panel
bodyPanel.Controls.Add(messageLabel);
bodyPanel.Controls.Add(iconBox);
// create the buttons
Button[] buttonsArray;
switch (buttons)
{
case MessageBoxButtons.OK:
buttonsArray = new Button[] { new Button() };
buttonsArray[0].DialogResult = DialogResult.OK;
buttonsArray[0].Text = "&OK";
break;
case MessageBoxButtons.OKCancel:
buttonsArray = new Button[] { new Button(), new Button() };
buttonsArray[0].DialogResult = DialogResult.OK;
buttonsArray[0].Text = "&OK";
buttonsArray[1].DialogResult = DialogResult.Cancel;
buttonsArray[1].Text = "&Cancel";
break;
case MessageBoxButtons.AbortRetryIgnore:
buttonsArray = new Button[] { new Button(), new Button(), new Button() };
buttonsArray[0].DialogResult = DialogResult.Abort;
buttonsArray[0].Text = "&Abort";
buttonsArray[1].DialogResult = DialogResult.Retry;
buttonsArray[1].Text = "&Retry";
buttonsArray[2].DialogResult = DialogResult.Ignore;
buttonsArray[2].Text = "&Ignore";
break;
case MessageBoxButtons.YesNoCancel:
buttonsArray = new Button[] { new Button(), new Button(), new Button() };
buttonsArray[0].DialogResult = DialogResult.Yes;
buttonsArray[0].Text = "&Yes";
buttonsArray[1].DialogResult = DialogResult.No;
buttonsArray[1].Text = "&No";
buttonsArray[2].DialogResult = DialogResult.Cancel;
buttonsArray[2].Text = "&Cancel";
break;
case MessageBoxButtons.YesNo:
buttonsArray = new Button[] { new Button(), new Button() };
buttonsArray[0].DialogResult = DialogResult.Yes;
buttonsArray[0].Text = "&Yes";
buttonsArray[1].DialogResult = DialogResult.No;
buttonsArray[1].Text = "&No";
break;
case MessageBoxButtons.RetryCancel:
buttonsArray = new Button[] { new Button(), new Button() };
buttonsArray[0].DialogResult = DialogResult.Retry;
buttonsArray[0].Text = "&Retry";
buttonsArray[1].DialogResult = DialogResult.Cancel;
buttonsArray[1].Text = "&Cancel";
break;
default:
throw new ArgumentException("Invalid button set.", "buttons");
}
// add buttons to the footer panel
// position according to number of buttons
int buttonCount = buttonsArray.Length;
int buttonSpacing = 10;
int buttonX = footerPanel.ClientSize.Width;
for (int i = buttonCount - 1; i >= 0; i--)
{
Button button = buttonsArray[i];
button.BackColor = SystemColors.Control;
button.FlatAppearance.BorderColor = SystemColors.Control;
button.FlatStyle = FlatStyle.System;
button.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
button.Cursor = Cursors.Hand;
if (i == buttonCount - 1)
{
buttonX -= button.Width + buttonSpacing + 10;
}
else
{
buttonX -= button.Width + buttonSpacing;
}
button.Location = new Point(buttonX, footerPanel.ClientSize.Height - button.Height - 10);
footerPanel.Controls.Add(button);
}
// mock label for title width minimum requirement
Label messageLabelTitle = new Label();
messageLabelTitle.AutoSize = true;
messageLabelTitle.Text = title;
int minWidth = messageLabelTitle.Width + 150;
// size the body panel according to content
int bodyPanelHeight = Math.Max(messageLabel.Height + 28, 72);
int bodyPanelWidth = messageLabel.Width + 82;
bodyPanel.Size = new Size(bodyPanelWidth, bodyPanelHeight);
// size the footer panel according to number of buttons or bodyPanelWidth
int footerPanelWidth = Math.Max((buttonCount * 75) + ((buttonCount + 1) * 15) + 20, bodyPanelWidth);
footerPanel.Size = new Size(footerPanelWidth, footerPanel.Height);
// compare panel widths to get the largest
int largestPanelWidth = Math.Max(bodyPanelWidth, footerPanelWidth);
// size the messageBox according to largest width requirement
int messageBoxWidth = Math.Max(largestPanelWidth, minWidth);
// size the messageBox according to top panel height and fixed footer height
int messageBoxHeight = bodyPanelHeight + footerPanel.Height + 34/*title bar*/;
messageBox.Size = new Size(messageBoxWidth, messageBoxHeight);
// Display the message box and return the result
DialogResult result = messageBox.ShowDialog(parentForm);
messageBox.Dispose();
return result;
}
}
}