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我試圖用nQuant將文件夾中的所有pngs轉換爲8bpp png。我試着用下面的代碼:在同一個FileStream上讀寫
foreach (string file in Directory.GetFiles(tempFolderPath, "*.png", SearchOption.TopDirectoryOnly))
{
using (MemoryStream memory = new MemoryStream())
{
using (FileStream fs = new FileStream(file, FileMode.OpenOrCreate, FileAccess.ReadWrite))
{
using (Bitmap image = new Bitmap(fs))
{
using (Image quantized = quantizer.QuantizeImage(image))
{
quantized.Save(memory, ImageFormat.Png);
byte[] bytes = memory.ToArray();
fs.Write(bytes, 0, bytes.Length);
}
}
}
}
}
然而,這是行不通的。沒有例外。只是不寫入文件。我用這個工作代碼取代了它。
Bitmap image;
foreach (string file in Directory.GetFiles(tempFolderPath, "*.png", SearchOption.TopDirectoryOnly))
{
using (FileStream fso = new FileStream(file, FileMode.Open, FileAccess.ReadWrite))
{
image = new Bitmap(fso);
}
using (MemoryStream memory = new MemoryStream())
{
using (FileStream fs = new FileStream(file, FileMode.Create, FileAccess.ReadWrite))
{
using (Image quantized = quantizer.QuantizeImage(image))
{
quantized.Save(memory, ImageFormat.Png);
byte[] bytes = memory.ToArray();
fs.Write(bytes, 0, bytes.Length);
}
}
}
}
好像FileMode.OpenOrCreate
可以做一個或另一個,但不是兩個。
無論如何讀取和寫在同一FileStream
?
做一個快速的谷歌搜索下面的'C#Stackoverflow閱讀和寫入相同的FileStream' – MethodMan
@MethodMan是的我發現[this](http://stackoverflow.com/questions/605685/how-to-both-read並且寫入一個c-sharp文件),我使用了最上面的答案。我也發現[這](http://stackoverflow.com/questions/33633344/read-and-write-to-a-file-in-the-same-stream)並嘗試添加fs.Flush(),但也是沒有工作。 – I23BigC