Cómo personalizar el cuadro de mensaje

Question

Estoy haciendo la aplicación C#, y quiero cambiar el estilo de un cuadro de mensaje. ¿Es posible o no?

Ejemplo: cambiar el estilo de botón, color de primer plano, etc.

Answer 1

Usted no puede cambiar el estilo del cuadro de mensaje por defecto ya que es dependiente del tema actual del sistema operativo Windows, sin embargo, puede crear fácilmente su propio cuadro de mensaje. Sólo tiene que añadir una nueva forma (es decir MyNewMessageBox) a su proyecto con estos valores:

FormBorderStyle FixedToolWindow 
ShowInTaskBar  False 
StartPosition  CenterScreen 

mostrarlo utilizar myNewMessageBoxInstance.ShowDialog();. Y agregue una etiqueta y botones a su formulario, como Aceptar y Cancelar, y establezca sus resultados DialogResults de manera apropiada, es decir, agregue un botón al MyNewMessageBox y llámelo btnOK. Establezca la propiedad DialogResult en la ventana de propiedades en DialogResult.OK. Cuando se pulsa este botón se devolvería el resultado OK:

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

sería recomendable añadir su método Show que toma el texto y otras opciones que desee:

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

Answer 2

MessageBox::Show utiliza la función de user32.dll, y su estilo es dependiente de Windows, por lo que no puede cambiar de esa manera, usted tiene que crear su propia forma

Answer 3

Aquí es el código necesario para crear su propio cuadro de mensaje:

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 = ""; 
    } 
} 

Answer 4

Añadir un winform a su proyecto (lo he denominado frmShowMessage) y poner esto controla en él:

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

Reemplace sus nuevos Códigos de presentación de la siguiente manera:

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 
} 

Ahora se puede llamar su Customized MessageBox en su proyecto de esta manera:

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); 

    } 

Olvidé el enlace que he aprendido de esto.