How to set custombutton default text?

Question

i created a custom button control.

the class code is inherited from a button.

the problem is that in the class code i set the text to "REC" but when i drag the custom button control in form1 designer from the toolbox the default text is custombutton1.

i want to make that when i drag the button from the toolbox the default text will be "REC".

using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Windows.Forms;
namespace CB
{
    public enum ButtonAlignment
    {
        Center,
        Left,
        Right,
        TopLeft,
        TopRight,
        BottomLeft,
        BottomRight
    }
    public class CustomButton : Button
    {
        private bool _DisplayFocusCues = true;
        private Image _originalImage;
        private Image _clickImage;
        private Size _lastImageSize;
        [Category("Layout")]
        [Description("Sets the initial alignment of the button within its parent container.")]
        public ButtonAlignment InitialAlignment { get; set; } = ButtonAlignment.Left;
        public CustomButton()
        {
            this.FlatStyle = FlatStyle.Flat;
            this.FlatAppearance.BorderSize = 0;
            this.FlatAppearance.BorderColor = Color.FromArgb(0, 255, 255, 255);
            this.FlatAppearance.MouseDownBackColor = Color.FromArgb(0, 255, 255, 255);
            this.FlatAppearance.MouseOverBackColor = Color.FromArgb(0, 255, 255, 255);
            this.DisplayFocusCues = false;
            _originalImage = ResizeImage(Properties.Resources.pngimg_com___buttons_PNG152, 160,160);
            this.Size = new Size(160, 160);
            this.Image = _originalImage;
            this.Text = "REC";
            _clickImage = CreateClickImage(_originalImage);
            _lastImageSize = _originalImage.Size;
        }
        protected override void OnParentChanged(EventArgs e)
        {
            base.OnParentChanged(e);
            AlignButton(); // Align button when added to a parent container
        }
        private void AlignButton()
        {
            if (this.Parent == null) return;
            int parentWidth = this.Parent.ClientSize.Width;
            int parentHeight = this.Parent.ClientSize.Height;
            switch (InitialAlignment)
            {
                case ButtonAlignment.Center:
                    this.Left = (parentWidth - this.Width) / 2;
                    this.Top = (parentHeight - this.Height) / 2;
                    break;
                case ButtonAlignment.Left:
                    this.Left = 0;
                    this.Top = (parentHeight - this.Height) / 2;
                    break;
                case ButtonAlignment.Right:
                    this.Left = parentWidth - this.Width;
                    this.Top = (parentHeight - this.Height) / 2;
                    break;
                case ButtonAlignment.TopLeft:
                    this.Left = 0;
                    this.Top = 0;
                    break;
                case ButtonAlignment.TopRight:
                    this.Left = parentWidth - this.Width;
                    this.Top = 0;
                    break;
                case ButtonAlignment.BottomLeft:
                    this.Left = 0;
                    this.Top = parentHeight - this.Height;
                    break;
                case ButtonAlignment.BottomRight:
                    this.Left = parentWidth - this.Width;
                    this.Top = parentHeight - this.Height;
                    break;
            }
        }
        protected override void OnResize(EventArgs e)
        {
            base.OnResize(e);
            this.Image = ResizeImage(_originalImage, this.Width, this.Height);
            _clickImage = CreateClickImage(this.Image);
        }
        protected override bool ShowFocusCues => _DisplayFocusCues;
        public bool DisplayFocusCues
        {
            get { return _DisplayFocusCues; }
            set { _DisplayFocusCues = value; }
        }
        public new Image Image
        {
            get { return base.Image; }
            set { base.Image = value; }
        }
        protected override void OnMouseDown(MouseEventArgs mevent)
        {
            base.OnMouseDown(mevent);
            if (_clickImage != null)
                this.Image = _clickImage;
        }
        protected override void OnMouseUp(MouseEventArgs mevent)
        {
            base.OnMouseUp(mevent);
            this.Image = ResizeImage(_originalImage, this.Width, this.Height);
        }
        private Image ResizeImage(Image originalImage, int width, int height)
        {
            if (originalImage == null)
                return null;
            Bitmap resizedImage = new Bitmap(width, height);
            using (Graphics gfx = Graphics.FromImage(resizedImage))
            {
                gfx.SmoothingMode = SmoothingMode.HighQuality;
                gfx.InterpolationMode = InterpolationMode.HighQualityBicubic;
                gfx.PixelOffsetMode = PixelOffsetMode.HighQuality;
                gfx.DrawImage(originalImage, new Rectangle(0, 0, width, height));
            }
            return resizedImage;
        }
        private Image CreateClickImage(Image original)
        {
            if (original == null)
                return null;
            Bitmap clickedImage = new Bitmap(original);
            using (Graphics g = Graphics.FromImage(clickedImage))
            {
                float brightness = 0.8f;
                float[][] ptsArray =
                {
                    new float[] {brightness, 0, 0, 0, 0},
                    new float[] {0, brightness, 0, 0, 0},
                    new float[] {0, 0, brightness, 0, 0},
                    new float[] {0, 0, 0, 1, 0},
                    new float[] {0.1f, 0.1f, 0.1f, 0, 1}
                };
                ColorMatrix clrMatrix = new ColorMatrix(ptsArray);
                ImageAttributes imgAttributes = new ImageAttributes();
                imgAttributes.SetColorMatrix(clrMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
                g.DrawImage(original, new Rectangle(0, 0, clickedImage.Width, clickedImage.Height), 0, 0, original.Width, original.Height, GraphicsUnit.Pixel, imgAttributes);
            }
            return clickedImage;
        }
    }
}

what i have tried so far is to Override the Text property to set the default value:

[DefaultValue("REC")]
public override string Text
{
    get => base.Text;
    set => base.Text = value;
}
public CustomButton()
{
    this.FlatStyle = FlatStyle.Flat;
    this.FlatAppearance.BorderSize = 0;
    this.FlatAppearance.BorderColor = Color.FromArgb(0, 255, 255, 255);
    this.FlatAppearance.MouseDownBackColor = Color.FromArgb(0, 255, 255, 255);
    this.FlatAppearance.MouseOverBackColor = Color.FromArgb(0, 255, 255, 255);
    this.DisplayFocusCues = false;
    _originalImage = ResizeImage(Properties.Resources.pngimg_com___buttons_PNG152, 160, 160);
    this.Size = new Size(160, 160);
    this.Image = _originalImage;
    // Set the default text here
    if (string.IsNullOrEmpty(this.Text) || this.Text.StartsWith("customButton"))
    {
        this.Text = "REC";
    }
    _clickImage = CreateClickImage(_originalImage);
    _lastImageSize = _originalImage.Size;
}

but it didn't change anything. the problem still exist.

Answer 1

HI @Chocolade , Welcome to Microsoft Q&A,

In Windows Forms, when a control is dragged from the toolbox to a form, the class name plus a number (such as Button1, Button2, etc.) is used as the control's Name property by default, rather than the Text property displayed on the button. Therefore, to keep the button's Text property always "REC".

To avoid modifying the button Text in the designer, you can hide the designer editing option of Text:

[Browsable(false)]

[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]

public new string Text

{
    get => "REC";
    set => base.Text = "REC";
}

Best Regards,

Jiale

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