c# - 建议代码分析，处理不止一次

Question

我只是想从比我更有经验的人那里寻求一些建议(不会很难)。

下面的代码...

        XmlSerializer serializer = new XmlSerializer(typeof(Installation));
        using (var sw = new StringWriter()) {
            using (var xw = XmlWriter.Create(sw)) {
                serializer.Serialize(xw, Installation);
            }
            xmlResult = sw.ToString();
        }

在代码分析中有如下报告...

CA2202 Do not dispose objects multiple times Object 'sw' can be disposed more than once in method 'Views_Commissioning_installationSubsidyForm.SaveInstall(string)'. To avoid generating a System.ObjectDisposedException you should not call Dispose more than one time on an object.: Lines: 766 nc1_DealerPortal installationSubsidyForm.aspx.cs 766

谁能解释我是如何多次处理“sw”的？我在这里做错了什么？

Answer 1

StringWriter 将由 XmlWriter 处理，因此通过使用 2 个 using 语句，它将被处理两次，更改您的代码如下:

XmlSerializer serializer = new XmlSerializer(typeof(Installation));
var sw = new StringWriter()) 
using (var xw = XmlWriter.Create(sw)) 
{
    serializer.Serialize(xw, Installation);
    xmlResult = sw.ToString();
}