XML解析检查属性是否存在 [英] XML parse check if attribute exist

问题描述

我已经建立了一种检查XML文件中是否存在属性的方法.如果不存在，则返回"False".它可以工作，但是解析文件需要很长时间.似乎它读取每一行的整个文件.我在这里错过了什么吗?我可以通过某种方式使其更有效吗?

I've made a method which checks if an attribute exist in a XML-file. If it does not exist it returns "False". It works but it takes a very long time to parse the file. It seems it reads the whole file for each single row. Have I missed something here? Can I make it more effective somehow?

    public static IEnumerable<RowData> getXML(string XMLpath)
    {
        XDocument xmlDoc = XDocument.Load("spec.xml");

        var specs = from spec in xmlDoc.Descendants("spec")
                    select new RowData
                    {
                        number= (string)spec.Attribute("nbr"),
                        name= (string)spec.Attribute("name").Value,
                        code = (string)spec.Attribute("code").Value,
                        descr = (string)spec.Attribute("descr").Value,
                        countObject = checkXMLcount(spec),


        return specs;
    }

    public static string checkXMLcount(XElement x)
    {
        Console.WriteLine(x.Attribute("nbr").Value);
        Console.ReadLine();
        try
        {
            if (x.Attribute("mep_count").Value == null)
            {
                return "False";
            }
            else
            {
                return x.Attribute("mep_count").Value;
            }
        }
        catch
        {
            return "False";
        }
    }

我测试了用仅返回并接收字符串的方法替换该方法:

I tested to replace the method with one that only returns and receive string:

public static string checkXMLcount(string x)
{
    Console.WriteLine(x);
    Console.ReadLine();
    return x;

}

我制作了一个只有一行的XML文件.控制台将输出该值15次.有什么想法吗?

I made a XML-file with only one single row. The console prints out the value 15 times. Any ideas?

推荐答案

已解决！无需其他方法:

Solved! No extra method needed:

countObject = spec.Attribute("mep_count") != null ? spec.Attribute("mep_count").Value : "False",

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