c# 怎么动态拉伸picturebox，改变图片大小

Question

rt

Answer 1

picturebox的sizemode属性改成StretchImage不就可以了

Answer 2

MouseUP MouseDown MouseMove 事件控制

Answer 3

/// <summary>
        /// 放大图形
        /// </summary>
        /// <param name="p_Bitmap">图形</param>
        /// <param name="p_Width">放大后的宽</param>
        /// <param name="p_Height">放大后高</param>
        /// <param name="p_ZoomType">放大类型 true为插值</param>
        /// <returns>放大后的图形</returns>
        public static Image BitmapToBlowUp(Image p_Bitmap, int p_Width, int p_Height, bool p_ZoomType)
        {
            Bitmap _ZoomBitmap = new Bitmap(p_Width, p_Height);            Graphics _Graphics = Graphics.FromImage(_ZoomBitmap);            if (!p_ZoomType)
            {
                _Graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.NearestNeighbor;
                _Graphics.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.Half;
            }            _Graphics.DrawImage(p_Bitmap, 0, 0, _ZoomBitmap.Width, _ZoomBitmap.Height);
            _Graphics.Dispose();
            return _ZoomBitmap;
        }