主页 / 问题 / 928597
Accepted
Philippe
Asked:2020-01-05 15:43:53 +0000 UTC2020-01-05 15:43:53 +0000 UTC

iOS 和 Windows 以不同的方式读取 .xml 文件 C#

  • 772

有一个项目Xamarin.Forms，里面有三个应用（iOS，Android，UWP），一个通用项目，一个通用代码Portable Class Library。在这个项目里面有一个共享的data.xml.

我是这样读的：

var assembly = IntrospectionExtensions.GetTypeInfo(typeof(Facility)).Assembly;
Stream stream = assembly.GetManifestResourceStream("MobilaApp.SharedFiles.data.xml");

GameLoader loader = new GameLoader(stream); 
items = loader.GetFacilities();

并且GameLoader.cs：

public GameLoader(Stream stream)
{
    BaseDocument = XDocument.Load(stream);
}

public List<Facility> GetFacilities()
{
    List<Facility> res = new List<Facility>();

    var elements = BaseDocument.Element("Facilities").Elements();
    foreach(var facility in elements)
    {
        string name = facility.Attribute("Name").Value;
        string description = facility.Attribute("Description").Value;
        string type = facility.Attribute("Type").Value;
        var boundariesElements = facility.Element("Boundaries").Elements(); //Key Value pairs
        Dictionary<double, double> boundaries = new Dictionary<double, double>();

        double key, value;
        foreach(var element in boundariesElements)
        {
            string sKey = element.Attribute("Key").Value;
            string sValue = element.Attribute("Value").Value;

            if (double.TryParse(sKey, out key))
            {
                if (double.TryParse(sValue, out value))
                {
                        boundaries.Add(key, value);
                }
            }
        }

        res.Add(new Facility(name, description, boundaries));
    }

    return res;
}

最后，data.xml

<?xml version="1.0" encoding="utf-8"?>
<Facilities>
  <Facility Name="Google" Description="This is a standard description." Type="1">
    <Boundaries>
      <KeyValuePair Key="0" Value="100" />
    </Boundaries>
  </Facility>
  <Facility Name="Facebook" Description="This description was created using my command line helper. I hope it works!" Type="0">
    <Boundaries>
      <KeyValuePair Key="0" Value="1.5" />
      <KeyValuePair Key="10" Value="2.5" />
    </Boundaries>
  </Facility>
</Facilities>

两个程序（Windows 和 iOS）都读取这个文件，然后处理它并在屏幕上显示结果。问题是结果不同：

iOS 12.1 在此处输入图像描述

视窗 10 在此处输入图像描述

c#

1 个回答

  1. Best Answer

    感谢@AlexanderPetrov 的解决方案。

    问题是不同的平台有不同的文化设置。

    这在方法中显示double.TryParse()

    if (double.TryParse(sKey, out key)) //Windows принимает числа формата 3.5, а iOS - нет
            {
                if (double.TryParse(sValue, out value))
                {
                    boundaries.Add(key, value); //Эти строчки не выполнялись на iOS, ибо double.TryParse() возвращал false
                }
            }

    解决方案

    System.Globalization.NumberStyles numberStyles = System.Globalization.NumberStyles.Any;
            System.Globalization.CultureInfo cultureInfo = System.Globalization.CultureInfo.InvariantCulture;
            foreach(var element in boundariesElements)
            {
                string sKey = element.Attribute("Key").Value;
                string sValue = element.Attribute("Value").Value;

                if (double.TryParse(sKey, numberStyles, cultureInfo, out key))
                {
                    if (double.TryParse(sValue, numberStyles, cultureInfo, out value))
                    {
                        boundaries.Add(key, value);
                    }
                }
            }
    • 0

相关问题