如何克服OutOfMemoryException异常从API拉大的XML文档？

问题描述

我从一个API拉1M +的记录。拉工程确定，但试图 ReadToEnd的时到字符串变量我收到一个内存不足的异常。

I am pulling 1M+ records from an API. The pull works ok, but I'm getting an out of memory exception when attempting to ReadToEnd into a string variable.

下面的代码：

        XDocument xmlDoc = new XDocument();

        HttpWebRequest client = (HttpWebRequest)WebRequest.Create(uri);
        client.Timeout = 2100000;//35 minutes
        WebResponse apiResponse = client.GetResponse();

        Stream receivedStream = apiResponse.GetResponseStream();
        StreamReader reader = new StreamReader(receivedStream);

        string s = reader.ReadToEnd();

堆栈跟踪：

Stack trace:

at System.Text.StringBuilder.ToString()
at System.IO.StreamReader.ReadToEnd()
at MyApplication.DataBuilder.getDataFromAPICall(String uri) in
    c:\Users\RDESLONDE\Documents\Projects\MyApplication\MyApplication\DataBuilder.cs:line 578
at MyApplication.DataBuilder.GetDataFromAPIAsXDoc(String uri) in
c:\Users\RDESLONDE\Documents\Projects\MyApplication\MyApplication\DataBuilder.cs:line 543

我能做些什么来解决此问题？

What can I do to work around this?

推荐答案

的是去当内存是一个问题的方式。它也是最快

XMLReader is the way to go when memory is an issue. It is also fastest.

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