我需要保存从图像文件(.png,.jpeg,.bmp)加载的Bitmap对象,并将其另存为图标(.ico)到单独的文件中。
首先,我尝试使用Icon ImageFormat将Bitmap对象保存到文件中:
using System.Drawing;
Bitmap bmp = (Bitmap)pictureBox1.Image;
bmp.Save(@"C:\icon.ico", Imaging.ImageFormat.Icon);
这个失败了,因为生成的图标格式不正确,不能用作图标。
下一步是从Bitmap获取HIcon并将其保存到文件中:
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();
这个也不能完成这项工作。尽管图标文件已正确写入,但它只有16种颜色且宽度和高度有限。
我希望能够编写具有自定义宽度和高度的图标,以保留原始图像的颜色。这有可能在.NET中实现吗?
提前致谢。
答案 0 :(得分:-1)
使用名称空间System.IO的工作示例可以是这样的
[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);
}
}
}