Question

我有一个包含PictureBox和Label的UserControl。 Control在不同事件上加载PictureBox中的三个不同图像（例如onMouseEnter，OnMouseLeave）。由于图像可以有不同的大小，我需要调整pictureBox的大小控制本身。下面提供了控件的OnPaint事件，但这不起作用。

    protected override void OnPaint(PaintEventArgs pe)
    {

        if (pictureBox.Image != null)
        {
            this.Width = this.pictureBox.Image.Size.Width;
            this.Height = this.pictureBox.Image.Size.Height;
            CutRoundedRectangle2(pictureBox, cornerRadius);
        }
        else
        {
            Bitmap DrawArea = new Bitmap(pictureBox.Size.Width, pictureBox.Size.Height);
            Graphics g = Graphics.FromImage(DrawArea);
            Pen mypen = new Pen(Color.Black);
            pictureBox.Image = DrawArea;
            System.Drawing.Pen pen = new Pen(new SolidBrush(this.ForeColor));
            g.DrawRectangle(pen, 0, 0, this.Width-1, this.Height-1);
            g.Dispose();
        }
        this.labelText.ocation = new Point((this.pictureBox.Width - this.labelText.Width) / 2,
                                            (this.pictureBox.Height - this.labelText.Height) / 2);
        base.OnPaint(pe);
    }

pictureBox SizeMode在控件的构造函数中设置：

this.pictureBox.SizeMode = PictureBoxSizeMode.AutoSize;

Answer 1

很久以前，我上次与WinForms合作过，但是...... 我的第一个想法是：您是否尝试将父控件的AutoSize属性的值设置为'true'，将AutoSizeMode设置为GrowAndShrink并在加载新图像时调用父控件的Refresh()方法到图片框？

Answer 2

@Alexey，pictureBox resize事件有帮助！

    private void pictureBox_Resize(object sender, EventArgs e)
    {
        this.Width = this.pictureBox.Image.Size.Width;
        this.Height = this.pictureBox.Image.Size.Height;
    }

c＃子图片框更改图像时调整父控件的大小

2 个答案: