字节数组的最大长度是多少？我正在尝试创建一个长度为 551858003 的字节数组。我创建了约526 MB的zip文件。但它给了我错误Out of memory exception我正在google drive上传文件。
这里我尝试了一些代码。我正在使用以下代码读取zip文件的字节。
byte[] FileByteArray = null;
using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (storage.FileExists(fileName))
{
using (IsolatedStorageFileStream fileStream = storage.OpenFile(fileName,FileMode.Open,FileAccess.Read))
{
fileStream.Flush();
fileStream.Position = 0;
long len = fileStream.Length;
FileByteArray = new byte[len];
fileStream.Read(FileByteArray, 0, FileByteArray.Length);
//using (BinaryReader binReader = new BinaryReader(fileStream))
//{
// Int32 Filelength = Convert.ToInt32(fileStream.Length);
// FileByteArray = binReader.ReadBytes(Filelength);
//}
fileStream.Flush();
fileStream.Dispose();
fileStream.Close();
}
}
}
如何解决此问题？我在上传大文件时收到OutOfMemoryException。我上传大约100MB左右。
以下是我在chunk
public void Images_ChunkRequst(string uploadURL, byte[] FileByteArray, int startIndex)
{
try
{
int chunkSize = 256 * 1024 * 2;
int totalChunks = (int)Math.Ceiling((double)FileByteArray.Length / chunkSize);
int endIndex = (int)(startIndex + chunkSize > FileByteArray.Length ? FileByteArray.Length : startIndex + chunkSize);
int length = endIndex - startIndex;
if (i < totalChunks)
{
CollectionIP = CheckInternet.Find();
if (CollectionIP.Count == 2 && DeviceNetworkInformation.IsWiFiEnabled)
NetworkIPaddress = IPAddress.Parse(CollectionIP[1]).ToString();
else if (CollectionIP.Count > 0 && DeviceNetworkInformation.IsWiFiEnabled)
NetworkIPaddress = IPAddress.Parse(CollectionIP[0]).ToString();
if (!string.IsNullOrEmpty(NetworkIPaddress))
{
i = i + 1;
var request = WebRequest.Create(uploadURL) as HttpWebRequest;
request.Method = "PUT";
request.Headers["Authorization"] = string.Format("Bearer {0} ", AccessToken);
request.ContentType = "application/zip";
request.ContentLength = length;
request.Headers["Content-Range"] = "bytes " + startIndex + "-" + (endIndex - 1) + "/" + FileByteArray.Length;
request.AllowWriteStreamBuffering = false;
request.BeginGetRequestStream(arPut =>
{
var request1 = (HttpWebRequest)arPut.AsyncState;
using (var dataStream = request1.EndGetRequestStream(arPut))
{
//getting exception here
dataStream.Write(FileByteArray.Skip(startIndex).Take(endIndex).ToArray(), 0, FileByteArray.Take(length).Count());
dataStream.Flush();
dataStream.Dispose();
dataStream.Close();
}
request1.BeginGetResponse(aPut =>
{
var request2 = (HttpWebRequest)aPut.AsyncState;
WebRequest.RegisterPrefix("http://", WebRequestCreator.ClientHttp);
WebRequest.RegisterPrefix("https://", WebRequestCreator.ClientHttp);
var response = (HttpWebResponse)request2.EndGetResponse(aPut);
if (response.StatusCode.ToString() == "308") // Resume Incomplete
{
response.Dispose();
response.Close();
string packet = response.Headers["Range"];
string[] rng = packet.Remove(0, 6).Split('-');
Images_ChunkRequst(uploadURL, FileByteArray, Convert.ToInt32(rng[1]) + 1);
}
else if (response.StatusCode.ToString() == "500") //Internal Server Error
{
i = i - 1;
response.Dispose();
response.Close();
Images_ChunkRequst(uploadURL, FileByteArray, startIndex);
}
else if (response.StatusCode.ToString() == "502") //Bad Gateway
{
i = i - 1;
response.Dispose();
response.Close();
Images_ChunkRequst(uploadURL, FileByteArray, startIndex);
}
else if (response.StatusCode.ToString() == "503") //Service Unavailable
{
i = i - 1;
response.Dispose();
response.Close();
Images_ChunkRequst(uploadURL, FileByteArray, startIndex);
}
else if (response.StatusCode.ToString() == "504") //Gateway Timeout
{
i = i - 1;
response.Dispose();
response.Close();
Images_ChunkRequst(uploadURL, FileByteArray, startIndex);
}
else if (response.StatusCode == HttpStatusCode.NotFound) //Not Found
{
i = i - 1;
response.Dispose();
response.Close();
Images_ChunkRequst(uploadURL, FileByteArray, startIndex);
}
else if (response.StatusCode == HttpStatusCode.OK) // upload complete.
{
Dispatcher.BeginInvoke(() =>
{
i = 0;// i must be 0 after each upload success
imgPass_Images.Visibility = Visibility.Visible;
this.LayoutRoot.IsHitTestVisible = true;
SystemTray.ProgressIndicator.IsIndeterminate = false;
SystemTray.IsVisible = false;
GetNextAutoOrder();
});
}
}, request1);
}, request);
}
else
{
this.LayoutRoot.IsHitTestVisible = true;
SystemTray.ProgressIndicator.IsIndeterminate = false;
SystemTray.IsVisible = false;
MessageBox.Show("Please check your internet connection.");
}
}
}
catch (Exception ex)
{
MessageBox.Show("Error occured. Trying to send failed package.");
Images_ChunkRequst(uploadURL, FileByteArray, startIndex);
}
}
我在dataStream.Write(FileByteArray.Skip(startIndex).Take(endIndex).ToArray(), 0, FileByteArray.Take(length).Count());处遇到异常。我已经尝试了很多来解决这个问题。有人可以帮帮我吗？我收到此异常Insufficient memory to continue the execution of the program
答案 0 :(得分：1)
System.Array的当前实现对其所有内部计数器等使用Int32，因此理论上最大元素数为Int32.MaxValue。所以问题出在其他地方。
答案 1 :(得分：0)
这与Array.Length无关。你正在耗尽进程内存。你应该以块的形式进行分配。
答案 2 :(得分：0)
这可能不是解决方案，但我发布的代码存在一些问题：
using (IsolatedStorageFileStream fileStream = storage.OpenFile(fileName,FileMode.Open,FileAccess.Read))
{
fileStream.Flush();
fileStream.Position = 0;
long len = fileStream.Length;
FileByteArray = new byte[len];
fileStream.Read(FileByteArray, 0, FileByteArray.Length);
//using (BinaryReader binReader = new BinaryReader(fileStream))
//{
// Int32 Filelength = Convert.ToInt32(fileStream.Length);
// FileByteArray = binReader.ReadBytes(Filelength);
//}
fileStream.Flush();
fileStream.Dispose();
fileStream.Close();
}
而不是将FileByteArray创建为流的大小，也可以在chucks中执行，也许可以将结果写入内存流（或者如果它支持发送chucks，甚至可以更好地将其直接发送到API。）所以基本上：
创建一个类似1024的字节数组（如果你想从缓冲区读取更大的数据，可能会更大 - 但要避免太大）
循环阅读：
byte[] buffer = new byte[1024];
int read = 0;
while((read = fileStream.Read(buffer, 0, buffer.Length)) > 0)
// write buffer[0:read] to memory location or temp file on disk (avoid Flushing for each write);