业务需要从客户端上传一个文件到服务端，采用WCF netTcpBinding 方式，服务端代码如下：
private string Save(FileUploadStream fileUpload, Template t)
{
//aspnet_Users userInfo = GetUserInformation();
string savePath = Path.Combine(ForecastTemplate.GetBaseUrl(), t.Id, t.Memo, "LastEditedTemplate", t.Name + "_upload.xlsx");
string saveDir = Path.Combine(ForecastTemplate.GetBaseUrl(), t.Id, t.Memo, "LastEditedTemplate");
if (!Directory.Exists(saveDir))
Directory.CreateDirectory(saveDir);
if (File.Exists(savePath))
File.Delete(savePath);
FileStream fw = new FileStream(savePath, FileMode.OpenOrCreate, FileAccess.Write);
byte[] buffer = new byte[100];
int length = fileUpload.ExcelStream.Read(buffer, 0, buffer.Length);
while (length > 0)
{
fw.Write(buffer, 0, length);
length = fileUpload.ExcelStream.Read(buffer, 0, buffer.Length);
}
fw.Flush();
fw.Close();
return savePath;
}
[MessageContract]
public class FileUploadStream
{
private string templateId;
[MessageHeader]
public string TemplateId
{
get { return templateId; }
set { templateId = value; }
}
private Stream excelStream;
[MessageBodyMember]
public Stream ExcelStream
{
get { return excelStream; }
set { excelStream = value; }
}
}
<system.serviceModel>
<bindings>
<netTcpBinding>
<binding name="TcpBinding" closeTimeout="00:05:00" openTimeout="00:05:00" receiveTimeout="00:05:00" sendTimeout="00:05:00" transferMode="Streamed" maxBufferPoolSize="2147483647" maxBufferSize="2147483647" maxConnections="10" maxReceivedMessageSize="2147483647">
<reliableSession enabled="false"/>
<security mode="Transport">
<transport clientCredentialType="Windows">
</transport>
</security>
<!--<security mode="None"></security>-->
<readerQuotas maxDepth="32" maxStringContentLength="2147483647" maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647"/>
</binding>
</netTcpBinding>
</bindings>
<services>
<service behaviorConfiguration="ForecastTemplateBehavior" name="XXX.ForecastTemplateService">
<endpoint address="ForecastTemplateService" binding="netTcpBinding" bindingConfiguration="TcpBinding" name="ForecastTemplateService" contract="XXX.IForecastTemplateService">
</endpoint>
<host>
<baseAddresses>
<add baseAddress="net.tcp://localhost:8100"/>
<add baseAddress="http://localhost:8101"/>
</baseAddresses>
<!--<baseAddresses>
<add baseAddress="net.tcp://localhost:8100"/>
<add baseAddress="http://localhost:8101"/>
</baseAddresses>-->
<timeouts closeTimeout="00:10:00"/>
</host>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="ForecastTemplateBehavior">
<serviceMetadata httpGetEnabled="true" httpGetUrl="ForecastTemplateService/"/>
<serviceDebug includeExceptionDetailInFaults="false"/>
<serviceThrottling maxConcurrentCalls="10000" maxConcurrentSessions="10000" maxConcurrentInstances="10000"/>
<dataContractSerializer maxItemsInObjectGraph="2147483647"/>
</behavior>
</serviceBehaviors>
<endpointBehaviors>
<behavior name="CustomBehavior">
<dataContractSerializer maxItemsInObjectGraph="2147483647"/>
</behavior>
</endpointBehaviors>
</behaviors>
</system.serviceModel>
在生产环境中，由于网络情况不同，当文件较大，文件流上传时客户端突然中断（比如拔掉网线），服务端程序timeout不触发，也不报任何错误，而是阻塞在
while (length > 0)
{
fw.Write(buffer, 0, length);
length = fileUpload.ExcelStream.Read(buffer, 0, buffer.Length);
}
这个循环的Read方法中，这就导致这个filestream 一直hold住没有办法释放，即使用户重新上传，也会因为之前的文件没有释放，导致上次的错误文件无法删除（为了保证时序性和唯一性，上传文件不能采用不同的名字），新文件不能上传。
网上资料查了不少，依然不能解决问题，求大神告知~~
