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Comment personnaliser la boîte de message

Je fais une application C # et je veux changer le style d'une boîte de message. Est-ce possible ou non?

Exemple: changer le style du bouton, la couleur d'avant, etc.

c#.netwinformsmessagebox
17
Vyas Dev

Vous ne pouvez pas reformuler le MessageBox par défaut car cela dépend du thème du système d'exploitation Windows actuel, mais vous pouvez facilement créer votre propre MessageBox. Ajoutez simplement un nouveau formulaire (c'est-à-dire MyNewMessageBox) à votre projet avec ces paramètres:

FormBorderStyle    FixedToolWindow
ShowInTaskBar      False
StartPosition      CenterScreen

Pour le montrer, utilisez myNewMessageBoxInstance.ShowDialog();. Et ajoutez une étiquette et des boutons à votre formulaire, tels que OK et Annuler et définissez leurs DialogResults de manière appropriée, c'est-à-dire ajoutez un bouton à MyNewMessageBox et appelez-le btnOK. Définissez la propriété DialogResult dans la fenêtre de propriétés sur DialogResult.OK. Lorsque ce bouton est enfoncé, il retournerait le résultat OK:

MyNewMessageBox myNewMessageBoxInstance = new MyNewMessageBox();
DialogResult result = myNewMessageBoxInstance.ShowDialog();
if (result == DialogResult.OK)
{
    // etc
}

Il serait conseillé d'ajouter votre propre méthode Show qui prend le texte et les autres options dont vous avez besoin:

public DialogResult Show(string text, Color foreColour)
{
     lblText.Text = text;
     lblText.ForeColor = foreColour;
     return this.ShowDialog();
}
51
djdd87

MessageBox::Show utilise la fonction de user32.dll, et son style dépend de Windows, donc vous ne pouvez pas le changer comme ça, vous devez créer votre propre formulaire

11
Kikaimaru

Voici le code nécessaire pour créer votre propre boîte de message:

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 MyStuff
{
    public class MyLabel : Label
    {
        public static Label Set(string Text = "", Font Font = null, Color ForeColor = new Color(), Color BackColor = new Color())
        {
            Label l = new Label();
            l.Text = Text;
            l.Font = (Font == null) ? new Font("Calibri", 12) : Font;
            l.ForeColor = (ForeColor == new Color()) ? Color.Black : ForeColor;
            l.BackColor = (BackColor == new Color()) ? SystemColors.Control : BackColor;
            l.AutoSize = true;
            return l;
        }
    }
    public class MyButton : Button
    {
        public static Button Set(string Text = "", int Width = 102, int Height = 30, Font Font = null, Color ForeColor = new Color(), Color BackColor = new Color())
        {
            Button b = new Button();
            b.Text = Text;
            b.Width = Width;
            b.Height = Height;
            b.Font = (Font == null) ? new Font("Calibri", 12) : Font;
            b.ForeColor = (ForeColor == new Color()) ? Color.Black : ForeColor;
            b.BackColor = (BackColor == new Color()) ? SystemColors.Control : BackColor;
            b.UseVisualStyleBackColor = (b.BackColor == SystemColors.Control);
            return b;
        }
    }
    public class MyImage : PictureBox
    {
        public static PictureBox Set(string ImagePath = null, int Width = 60, int Height = 60)
        {
            PictureBox i = new PictureBox();
            if (ImagePath != null)
            {
                i.BackgroundImageLayout = ImageLayout.Zoom;
                i.Location = new Point(9, 9);
                i.Margin = new Padding(3, 3, 2, 3);
                i.Size = new Size(Width, Height);
                i.TabStop = false;
                i.Visible = true;
                i.BackgroundImage = Image.FromFile(ImagePath);
            }
            else
            {
                i.Visible = true;
                i.Size = new Size(0, 0);
            }
            return i;
        }
    }
    public partial class MyMessageBox : Form
    {
        private MyMessageBox()
        {
            this.panText = new FlowLayoutPanel();
            this.panButtons = new FlowLayoutPanel();
            this.SuspendLayout();
            // 
            // panText
            // 
            this.panText.Parent = this;
            this.panText.AutoScroll = true;
            this.panText.AutoSize = true;
            this.panText.AutoSizeMode = AutoSizeMode.GrowAndShrink;
            //this.panText.Location = new Point(90, 90);
            this.panText.Margin = new Padding(0);
            this.panText.MaximumSize = new Size(500, 300);
            this.panText.MinimumSize = new Size(108, 50);
            this.panText.Size = new Size(108, 50);
            // 
            // panButtons
            // 
            this.panButtons.AutoSize = true;
            this.panButtons.AutoSizeMode = AutoSizeMode.GrowAndShrink;
            this.panButtons.FlowDirection = FlowDirection.RightToLeft;
            this.panButtons.Location = new Point(89, 89);
            this.panButtons.Margin = new Padding(0);
            this.panButtons.MaximumSize = new Size(580, 150);
            this.panButtons.MinimumSize = new Size(108, 0);
            this.panButtons.Size = new Size(108, 35);
            // 
            // MyMessageBox
            // 
            this.AutoScaleDimensions = new SizeF(8F, 19F);
            this.AutoScaleMode = AutoScaleMode.Font;
            this.ClientSize = new Size(206, 133);
            this.Controls.Add(this.panButtons);
            this.Controls.Add(this.panText);
            this.Font = new Font("Calibri", 12F, FontStyle.Regular, GraphicsUnit.Point, ((byte)(0)));
            this.FormBorderStyle = FormBorderStyle.FixedSingle;
            this.Margin = new Padding(4);
            this.MaximizeBox = false;
            this.MinimizeBox = false;
            this.MinimumSize = new Size(168, 132);
            this.Name = "MyMessageBox";
            this.ShowIcon = false;
            this.ShowInTaskbar = false;
            this.StartPosition = FormStartPosition.CenterScreen;
            this.ResumeLayout(false);
            this.PerformLayout();
        }
        public static string Show(Label Label, string Title = "", List<Button> Buttons = null, PictureBox Image = null)
        {
            List<Label> Labels = new List<Label>();
            Labels.Add(Label);
            return Show(Labels, Title, Buttons, Image);
        }
        public static string Show(string Label, string Title = "", List<Button> Buttons = null, PictureBox Image = null)
        {
            List<Label> Labels = new List<Label>();
            Labels.Add(MyLabel.Set(Label));
            return Show(Labels, Title, Buttons, Image);
        }
        public static string Show(List<Label> Labels = null, string Title = "", List<Button> Buttons = null, PictureBox Image = null)
        {
            if (Labels == null) Labels = new List<Label>();
            if (Labels.Count == 0) Labels.Add(MyLabel.Set(""));
            if (Buttons == null) Buttons = new List<Button>();
            if (Buttons.Count == 0) Buttons.Add(MyButton.Set("OK"));
            List<Button> buttons = new List<Button>(Buttons);
            buttons.Reverse();

            int ImageWidth = 0;
            int ImageHeight = 0;
            int LabelWidth = 0;
            int LabelHeight = 0;
            int ButtonWidth = 0;
            int ButtonHeight = 0;
            int TotalWidth = 0;
            int TotalHeight = 0;

            MyMessageBox mb = new MyMessageBox();

            mb.Text = Title;

            //Image
            if (Image != null)
            {
                mb.Controls.Add(Image);
                Image.MaximumSize = new Size(150, 300);
                ImageWidth = Image.Width + Image.Margin.Horizontal;
                ImageHeight = Image.Height + Image.Margin.Vertical;
            }

            //Labels
            List<int> il = new List<int>();
            mb.panText.Location = new Point(9 + ImageWidth, 9);
            foreach (Label l in Labels)
            {
                mb.panText.Controls.Add(l);
                l.Location = new Point(200, 50);
                l.MaximumSize = new Size(480, 2000);
                il.Add(l.Width);
            }
            int mw = Labels.Max(x => x.Width);
            il.ToString();
            Labels.ForEach(l => l.MinimumSize = new Size(Labels.Max(x => x.Width), 1));
            mb.panText.Height = Labels.Sum(l => l.Height);
            mb.panText.MinimumSize = new Size(Labels.Max(x => x.Width) + mb.ScrollBarWidth(Labels), ImageHeight);
            mb.panText.MaximumSize = new Size(Labels.Max(x => x.Width) + mb.ScrollBarWidth(Labels), 300);
            LabelWidth = mb.panText.Width;
            LabelHeight = mb.panText.Height;

            //Buttons
            foreach (Button b in buttons)
            {
                mb.panButtons.Controls.Add(b);
                b.Location = new Point(3, 3);
                b.TabIndex = Buttons.FindIndex(i => i.Text == b.Text);
                b.Click += new EventHandler(mb.Button_Click);
            }
            ButtonWidth = mb.panButtons.Width;
            ButtonHeight = mb.panButtons.Height;

            //Set Widths
            if (ButtonWidth > ImageWidth + LabelWidth)
            {
                Labels.ForEach(l => l.MinimumSize = new Size(ButtonWidth - ImageWidth - mb.ScrollBarWidth(Labels), 1));
                mb.panText.Height = Labels.Sum(l => l.Height);
                mb.panText.MinimumSize = new Size(Labels.Max(x => x.Width) + mb.ScrollBarWidth(Labels), ImageHeight);
                mb.panText.MaximumSize = new Size(Labels.Max(x => x.Width) + mb.ScrollBarWidth(Labels), 300);
                LabelWidth = mb.panText.Width;
                LabelHeight = mb.panText.Height;
            }
            TotalWidth = ImageWidth + LabelWidth;

            //Set Height
            TotalHeight = LabelHeight + ButtonHeight;

            mb.panButtons.Location = new Point(TotalWidth - ButtonWidth + 9, mb.panText.Location.Y + mb.panText.Height);

            mb.Size = new Size(TotalWidth + 25, TotalHeight + 47);
            mb.ShowDialog();
            return mb.Result;
        }

        private FlowLayoutPanel panText;
        private FlowLayoutPanel panButtons;
        private int ScrollBarWidth(List<Label> Labels)
        {
            return (Labels.Sum(l => l.Height) > 300) ? 23 : 6;
        }

        private void Button_Click(object sender, EventArgs e)
        {
            Result = ((Button)sender).Text;
            Close();
        }

        private string Result = "";
    }
}
6
Makai

Ajoutez un winform à votre projet (je l'ai nommé frmShowMessage) et mettez ces contrôles dessus:

 1. Panel      (pnlShowMessage)
 2. Label      (lblMessageText)
 3. PictureBox (pictureBox1)
 4. ImageList  (imageList1)

Remplacez vos nouveaux codes de formulaire comme ci-dessous:

using System;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Drawing.Drawing2D;

namespace CostumeMessageBox 
{
    public partial class frmShowMessage : Form
    {
        Button btnOk = new Button();  //Create object of Button.
        Button btnCancel = new Button();
        Button btnNo = new Button();
        Button btnYes = new Button();
        public const int WM_NCLBUTTONDOWN = 0xA1;
        public const int HT_CAPTION = 0x2;

        [DllImportAttribute("user32.dll")]
        public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
        [DllImport("user32.dll")]
        public static extern bool ReleaseCapture();
        public frmShowMessage()
        {
            InitializeComponent();
        }

        /// <summary>
        /// Here I am overriding Paint method of form object
        /// and set it's background color as gradient. Here I am
        /// using LinearGradientBrush class object to make gradient
        /// color which comes in System.Drawing.Drawing2D namespace.
        /// </summary>
        /// <param name="e"></param>
        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            ControlPaint.DrawBorder(e.Graphics, ClientRectangle,
                                    Color.DarkRed, 3, ButtonBorderStyle.Solid,
                                    Color.DarkRed, 3, ButtonBorderStyle.Solid,
                                    Color.DarkRed, 3, ButtonBorderStyle.Solid,
                                    Color.DarkRed, 3, ButtonBorderStyle.Solid);
            //Rectangle rect = this.ClientRectangle;
            //LinearGradientBrush brush = new LinearGradientBrush(rect, Color.Snow, Color.SeaShell, 60); //LightCyan Lavender LightGray
            //e.Graphics.FillRectangle(brush, rect);
            //base.OnPaint(e);
        }

        private void frmShowMessage_Load(object sender, EventArgs e)
        {
            btnOk.Text = "تایید";  //Here we set text of Button.
            btnOk.DialogResult = DialogResult.OK;  //Set DialogResult property of button.
            btnOk.FlatStyle = FlatStyle.Popup;  //Set flat appearence of button.
            btnOk.BackColor = Color.Beige;
            btnOk.FlatAppearance.BorderSize = 0;

            btnCancel.Text = "انصراف";
            btnCancel.DialogResult = DialogResult.Cancel;
            btnCancel.FlatStyle = FlatStyle.Popup;
            btnCancel.BackColor = Color.Beige;
            btnCancel.FlatAppearance.BorderSize = 0;

            btnNo.Text = "خیر";
            btnNo.DialogResult = DialogResult.No;
            btnNo.FlatStyle = FlatStyle.Popup;
            btnNo.BackColor = Color.Beige;
            btnNo.FlatAppearance.BorderSize = 0;

            btnYes.Text = "بله";
            btnYes.DialogResult = DialogResult.Yes;
            btnYes.FlatStyle = FlatStyle.Popup;
            btnYes.BackColor = Color.Beige;
            btnYes.FlatAppearance.BorderSize = 0;
        }


        /// <summary>
        /// setMessage method is used to display message
        /// on form and it's height adjust automatically.
        /// I am displaying message in a Label control.
        /// </summary>
        /// <param name="messageText">Message which needs to be displayed to user.</param>
        private void setMessage(string messageText)
        {
            int number = Math.Abs(messageText.Length / 30);
            if (number != 0)
            {
                lblMessageText.Height = lblRightBorder.Height = number*25;
                Height = lblMessageText.Height;
            }

            lblMessageText.Text = messageText;
        }

        /// <summary>
        /// This method is used to add button on message box.
        /// </summary>
        /// <param name="MessageButton">MessageButton is type of enumMessageButton
        /// through which I get type of button which needs to be displayed.</param>
        private void addButton(enumMessageButton MessageButton)
        {
            switch (MessageButton)
            {
                case enumMessageButton.OK:
                    {
                        //If type of enumButton is OK then we add OK button only.
                        btnOk.SetBounds(pnlShowMessage.ClientSize.Width - 80, 5, 75, 25);  // Set bounds of button.
                        pnlShowMessage.Controls.Add(btnOk);  //Finally Add button control on panel.
                    }
                    break;
                case enumMessageButton.OKCancel:
                    {
                        btnOk.SetBounds((pnlShowMessage.ClientSize.Width - 70), 5, 65, 25);
                        pnlShowMessage.Controls.Add(btnOk);

                        btnCancel.SetBounds((pnlShowMessage.ClientSize.Width - (btnOk.ClientSize.Width + 5 + 80)), 5, 75, 25);
                        pnlShowMessage.Controls.Add(btnCancel);

                    }
                    break;
                case enumMessageButton.YesNo:
                    {

                        btnNo.SetBounds((pnlShowMessage.ClientSize.Width - 70), 5, 65, 25);
                        pnlShowMessage.Controls.Add(btnNo);

                        btnYes.SetBounds((pnlShowMessage.ClientSize.Width - (btnNo.ClientSize.Width + 5 + 80)), 5, 75, 25);
                        pnlShowMessage.Controls.Add(btnYes);
                    }
                    break;
                case enumMessageButton.YesNoCancel:
                    {
                        btnCancel.SetBounds((pnlShowMessage.ClientSize.Width - 70), 5, 65, 25);
                        pnlShowMessage.Controls.Add(btnCancel);

                        btnNo.SetBounds((pnlShowMessage.ClientSize.Width - (btnCancel.ClientSize.Width + 5 + 80)), 5, 75, 25);
                        pnlShowMessage.Controls.Add(btnNo);

                        btnYes.SetBounds((pnlShowMessage.ClientSize.Width - (btnCancel.ClientSize.Width + btnNo.ClientSize.Width + 10 + 80)), 5, 75, 25);
                        pnlShowMessage.Controls.Add(btnYes);
                    }
                    break;
            }
        }

        /// <summary>
        /// We can use this method to add image on message box.
        /// I had taken all images in ImageList control so that
        /// I can eaily add images. Image is displayed in 
        /// PictureBox control.
        /// </summary>
        /// <param name="MessageIcon">Type of image to be displayed.</param>
        private void addIconImage(enumMessageIcon MessageIcon)
        {
            switch (MessageIcon)
            {
                case enumMessageIcon.Error:
                    pictureBox1.Image = imageList1.Images["Error"];  //Error is key name in imagelist control which uniqly identified images in ImageList control.
                    break;
                case enumMessageIcon.Information:
                    pictureBox1.Image = imageList1.Images["Information"];
                    break;
                case enumMessageIcon.Question:
                    pictureBox1.Image = imageList1.Images["Question"];
                    break;
                case enumMessageIcon.Warning:
                    pictureBox1.Image = imageList1.Images["Warning"];
                    break;
            }
        }

        #region Overloaded Show message to display message box.

        /// <summary>
        /// Show method is overloaded which is used to display message
        /// and this is static method so that we don't need to create 
        /// object of this class to call this method.
        /// </summary>
        /// <param name="messageText"></param>
        internal static DialogResult Show(string messageText)
        {
            frmShowMessage frmMessage = new frmShowMessage();
            frmMessage.setMessage(messageText);
            frmMessage.addIconImage(enumMessageIcon.Information);
            frmMessage.addButton(enumMessageButton.OK);
            frmMessage.ShowDialog();
            return frmMessage.DialogResult;
        }

        internal static DialogResult Show(string messageText, string messageTitle)
        {
            frmShowMessage frmMessage = new frmShowMessage();
            frmMessage.Text = messageTitle;
            frmMessage.setMessage(messageText);
            frmMessage.addIconImage(enumMessageIcon.Information);
            frmMessage.addButton(enumMessageButton.OK);
            frmMessage.ShowDialog();
            return frmMessage.DialogResult;
        }

        internal static DialogResult Show(string messageText, string messageTitle, enumMessageIcon messageIcon,
                                          enumMessageButton messageButton)
        {
            frmShowMessage frmMessage = new frmShowMessage();
            frmMessage.setMessage(messageText);
            frmMessage.Text = messageTitle;
            frmMessage.addIconImage(messageIcon);
            frmMessage.addButton(messageButton);
            frmMessage.ShowDialog();
            return frmMessage.DialogResult;
        }

        #endregion


        private void frmShowMessage_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button != MouseButtons.Left) return;
            ReleaseCapture();
            SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);

        }

    }

    #region constant defiend in form of enumration which is used in showMessage class.

    internal enum enumMessageIcon
    {
        Error,
        Warning,
        Information,
        Question,
    }

    internal enum enumMessageButton
    {
        OK,
        YesNo,
        YesNoCancel,
        OKCancel
    }

    #endregion
}

Vous pouvez maintenant appeler votre Customized MessageBox dans votre projet comme ceci:

    private void btnQuestion_Click(object sender, EventArgs e)
    {
        frmShowMessage.Show(rch.Text,
            "Message Text", enumMessageIcon.Question, enumMessageButton.YesNoCancel);
    }

    private void btnInformation_Click(object sender, EventArgs e)
    {
        frmShowMessage.Show(rch.Text,
            "Message Text", enumMessageIcon.Information, enumMessageButton.OKCancel);

    }

    private void btnError_Click(object sender, EventArgs e)
    {
        frmShowMessage.Show(rch.Text,
            "Message Text", enumMessageIcon.Error, enumMessageButton.OK);
    }

    private void btnWarning_Click(object sender, EventArgs e)
    {
        frmShowMessage.Show(rch.Text,
            "Message Text", enumMessageIcon.Warning, enumMessageButton.YesNo);

    }

J'ai oublié le lien qui m'a appris cela.

5
Alex Jolig