問題描述

我需要保存從圖像文件(.png、.jpeg、.bmp)加載的 Bitmap 對象，并將其作為圖標 (.ico) 保存到單獨的文件中.

I need to save Bitmap object loaded from image file (.png, .jpeg, .bmp) and save it as an icon (.ico) to a separate file.

首先，我嘗試使用 Icon ImageFormat 將 Bitmap 對象保存到文件中:

First I tried saving Bitmap object to a file with Icon ImageFormat:

using System.Drawing;

Bitmap bmp = (Bitmap)pictureBox1.Image;
bmp.Save(@"C:icon.ico", Imaging.ImageFormat.Icon);

這個失敗了，因為生成的圖標格式不正確，不能用作圖標.

This one fails, as the icon produced is not in a proper format and it cannot be used as an icon.

接下來是從 Bitmap 中獲取 HIcon 并將其保存到文件中:

Next one was to get HIcon from Bitmap and save it to a file:

using System.Drawing;
using System.IO;

StreamWriter iconWriter = new StreamWriter(@"C:icon.ico");
Icon ico = Icon.FromHandle(((Bitmap)pictureBox1.Image).GetHicon())
ico.Save(iconWriter.BaseStream);
iconWriter.Close();
iconWriter.Dispose();

這個也不行.圖標文件雖然寫的很好，但是只有16種顏色，寬度和高度有限.

This one does not do the job too. Although icon file is properly written, it has only 16 colors and a limited width and height.

我希望能夠編寫具有自定義寬度和高度的圖標，以保留原始圖像的顏色.這可以在 .NET 中實現嗎?

I'd like to be able to write icons with custom width and height that would preserve colors from the original image. Is this possible to achive in .NET?

提前致謝.

推薦答案

使用名稱空間 System.IO 的工作示例可以是這樣的

a working sample using the name space System.IO can be like this

[System.Runtime.InteropServices.DllImport("user32.dll")]
extern static bool DestroyIcon(IntPtr handle);

private void buttonConvert2Ico_Click(object sender, EventArgs e)
{
    OpenFileDialog openFileDialog1 = new OpenFileDialog 

    openFileDialog1.InitialDirectory = "C:\Data\";
    openFileDialog1.Filter = "BitMap(*.bmp)|*.bmp";
    openFileDialog1.FilterIndex = 2;
    openFileDialog1.RestoreDirectory = true;

    if(openFileDialog1.ShowDialog() == DialogResult.OK)
    {
        try
        {
            string sFn = openFileDialog1.FileName;
            MessageBox.Show("Filename=" + sFn);
            string destFileName = sFn.Substring(0, sFn.Length -3) +"ico";

            // Create a Bitmap object from an image file.
            Bitmap bmp = new Bitmap(sFn);

            // Get an Hicon for myBitmap. 
            IntPtr Hicon = bmp.GetHicon();

            // Create a new icon from the handle. 
            Icon newIcon = Icon.FromHandle(Hicon);

            //Write Icon to File Stream
            System.IO.FileStream fs = new System.IO.FileStream(destFileName, System.IO.FileMode.OpenOrCreate);
            newIcon.Save(fs);
            fs.Close();
            DestroyIcon(Hicon);

            //DestroyIcon( hIcon);
            setStatus("Created icon From=" + sFn + ", into " + destFileName);
        }
        catch (Exception ex)
        {
            MessageBox.Show("Error: Could not read/write file. Original error: " + ex.Message);
        }
    }
}

這篇關于如何將位圖另存為圖標?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！