.net – 使用FileStreamResult,MemoryStream是如何关闭的？

以下代码工作，但我想知道是否正确关闭创建的MemoryStream。应该如何执行或FileStreamResult为我处理它？

public FileStreamResult DownloadBudgetedRoleOpportunities(
    Guid projectGuid,IEnumerable<Guid> guidRequiredRoles)
{
    var rolebroker = new ProjectRoleBudgetBroker();
    var memstream = rolebroker.CreateBudgetedRoleOpportunies(
        projectGuid,guidRequiredRoles);

    var fsr = new FileStreamResult ( memstream,"application/csv" )
              {
                FileDownloadName = "RoleOpportunities.csv"
              };
    // memstream.Close(); throws exception
    return fsr;
}

解决方法

通过Google for FileStreamResult.cs快速搜索，您可以验证在WriteFile方法中，使用using语句正确处理流。 (无双关意)

protected override void WriteFile(HttpResponseBase response) {
    // grab chunks of data and write to the output stream
    Stream outputStream = response.OutputStream;
    using (FileStream) {
        byte[] buffer = new byte[_bufferSize];

        while (true) {
            int bytesRead = FileStream.Read(buffer,_bufferSize);
            if (bytesRead == 0) {
                // no more data
                break;
            }

            outputStream.Write(buffer,bytesRead);
        }
    }
}

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