Question

    public class Container : XmlElementGenerator
{
    public string projectcode { get; set; }
    public string projectname { get; set; }
    public string projectleader { get; set; }
    public string barcode { get; set; }
    public string sampleartid { get; set; }
    public string sampledescription { get; set; }
    public string remark { get; set; }
    public DateTime samplingdate { get; set; }
    public int samplenumber { get; set; }

    public XmlElement GenerateXMLElement(XmlDocument xmlDocument)
    {
        Type containerGenerator = typeof(Container);

        XmlElement container = ElementChildrenGenerator(xmlDocument, "container");

        foreach (PropertyInfo prop in containerGenerator.GetProperties())
        {
            container.AppendChild(ElementChildrenGenerator(xmlDocument, prop.Name, prop.GetValue(this).ToString()));
        }

        return container;
    }

}

这里prop.GetValue(this)上的错误 - “System.NullReferenceException：对象引用未设置为对象的实例”。为什么我不能使用“this”来访问该对象？我不想再添加一个参数。请帮忙

Answer 1

试试这个：

public class Container : XmlElementGenerator
{
    public string projectcode { get; set; }
    public string projectname { get; set; }
    public string projectleader { get; set; }
    public string barcode { get; set; }
    public string sampleartid { get; set; }
    public string sampledescription { get; set; }
    public string remark { get; set; }
    public DateTime samplingdate { get; set; }
    public int samplenumber { get; set; }

    public XmlElement GenerateXMLElement(XmlDocument xmlDocument)
    {
       XmlElement container = ElementChildrenGenerator(xmlDocument,"container");

        foreach (PropertyInfo prop in this.GetType().GetProperties())
        {
            container.AppendChild(ElementChildrenGenerator(xmlDocument, prop.Name, prop.GetValue(this).ToString()));
        }

        return container;
    }

}

Answer 2

找到一个解决方案 - 我只是没有检查属性的null值输入。检查是否有效。

如何在同一方法中访问调用其类方法的对象？

2 个答案: