Question

我正在尝试使用tcp（NetworkStream）和内存流传输图像。我试过这段代码（客户端）：

BinaryReader breader = new BinaryReader(stream);
                int ctBytes = breader.ReadInt32();
                MemoryStream ms = new MemoryStream(breader.ReadBytes(ctBytes));
                Image img = Image.FromStream(ms);

并且异常发生在第3行。实际上，此代码位于循环内，并且在第一次迭代中不会抛出异常。服务器代码（如果需要）：

BinaryWriter bWriter = new BinaryWriter(writer.BaseStream);
       MemoryStream ms = new MemoryStream();
       img.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
       byte[] buffer = new byte[ms.Length];
       ms.Seek(0, SeekOrigin.Begin);
       ms.Read(buffer, 0, buffer.Length);
       bWriter.Write(buffer.Length);
       bWriter.Write(buffer);

感谢。

Answer 1

您需要处置资源：

using(BinaryWriter bWriter = new BinaryWriter(writer.BaseStream))
using(MemoryStream ms = new MemoryStream())
{
   img.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
   byte[] buffer = new byte[ms.Length];
   ms.Seek(0, SeekOrigin.Begin);
   ms.Read(buffer, 0, buffer.Length);
   bWriter.Write(buffer.Length);
   bWriter.Write(buffer);
}

通过using子句，资源在块结束时释放。

你必须在客户端做同样的事情。

接收图像时出现System.OutOfMemoryException

1 个答案: