提取Office图标的方法

需求

几年前，好声音以独特节目形式吸引了很多选手和观众的观注，旨在"只寻找优质声音"；可声音各有特色时，还得看颜值，当然这也无可厚非。虽然扯得有点远，我想表达的是软件开发的稳定性与美观性之间的平衡问题，亦或是功能需求与用户体验关系把握问题。有人认为只是功能强大，满足需求，界面是次要的；而实际结果，功能也并不强大，界面操作也十分复杂；我个人观点正好相反，如果我们的软件并不能达到功能强大，运行稳定，我们更得加强界面的开发，正确地引导用户，减少出错机率。

下面是Excel 2019 的界面，引领着整个行业的界面风格：

现在需要将其图标提取怎么操作？

实现

通过一些图标提取软件都无法提取，唯一可以使用的方法是调有官方的GetImageMso方法。

开发环境：VS2019+VSTO，以Excel为例。

首先新建一个Add In工程：

其次，在ThisAddIn类里创建一个Application对象，以便全局访问。

 public static Excel.Application App;
private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
       App = this.Application;
}

然后，添加一个Ribbon，并新增按键及相关事件。

接着，使用GetImageMso方法下载相应名称、大小的图片。

IPictureDisp pictureDisp = ThisAddIn.App.CommandBars.GetImageMso(name, 32, 32);

最后，将IPictureDisp转化透明图标输出，这是第二个关键点：

public class ImageHelper
    {
        /// <summary>
        /// IPictureDisp转Bitmap
        /// </summary>
        /// <param name="ipd">IPictureDisp</param>
        /// <returns>Bitmap</returns>
        public static Bitmap ConvertPixelByPixel(IPictureDisp ipd)
        {
            // get the info about the HBITMAP inside the IPictureDisp
            var dibsection = new DIBSECTION();
            GetObjectDIBSection((IntPtr)ipd.Handle, Marshal.SizeOf(dibsection), ref dibsection);
            var width = dibsection.dsBm.bmWidth;
            var height = dibsection.dsBm.bmHeight;

            // create the destination Bitmap object
            var bitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);

            unsafe
            {
                // get a pointer to the raw bits
                var pBits = (RGBQUAD*)(void*)dibsection.dsBm.bmBits;

                // copy each pixel manually
                for (var x = 0; x < dibsection.dsBmih.biWidth; x++)
                    for (var y = 0; y < dibsection.dsBmih.biHeight; y++)
                    {
                        var offset = y * dibsection.dsBmih.biWidth + x;
                        if (pBits[offset].rgbReserved != 0)
                        {
                            bitmap.SetPixel(x, y, Color.FromArgb(pBits[offset].rgbReserved, pBits[offset].rgbRed, pBits[offset].rgbGreen, pBits[offset].rgbBlue));
                        }
                    }
            }
            return bitmap;
        }
 
        [StructLayout(LayoutKind.Sequential)]
        private struct RGBQUAD
        {
            public byte rgbBlue;
            public byte rgbGreen;
            public byte rgbRed;
            public byte rgbReserved;
        }
 
        [StructLayout(LayoutKind.Sequential)]
        public struct BITMAP
        {
            public int bmType;
            public int bmWidth;
            public int bmHeight;
            public int bmWidthBytes;
            public short bmPlanes;
            public short bmBitsPixel;
            public IntPtr bmBits;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct BITMAPINFOHEADER
        {
            public int biSize;
            public int biWidth;
            public int biHeight;
            public short biPlanes;
            public short biBitCount;
            public int biCompression;
            public int biSizeImage;
            public int biXPelsPerMeter;
            public int biYPelsPerMeter;
            public int biClrUsed;
            public int bitClrImportant;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct DIBSECTION
        {
            public BITMAP dsBm;
            public BITMAPINFOHEADER dsBmih;
            public int dsBitField1;
            public int dsBitField2;
            public int dsBitField3;
            public IntPtr dshSection;
            public int dsOffset;
        }

        [DllImport("gdi32.dll", EntryPoint = "GetObject")]
        public static extern int GetObjectDIBSection(IntPtr hObject, int nCount, ref DIBSECTION lpObject);
}