Question

我想从一个将从xml文件初始化的字符串填充属性的DescriptionAttribute。该属性将用于propertygrid。

主要是从xml文件中获取描述。如何将它变成一个const字符串，然后我可以将其用作属性的DescriptionAttribute。

我尝试了一些没有成功的事情，所以任何帮助都会受到赞赏。

还是有另外一个我们要将xml值分配给描述吗？也许是一个变换器？请指出正确的方向。

public class1
{
    string BaboonDescription = "";
    string TigerDescription = "";
    const string SnakeDescription = "A snake is bla bla bla";

    // method that extracts the descriptions from the xml file.
    public void PopulateFromXml(string xmlfile)
    {
        XDocument xDoc = XDocument.Load(xmlfile);
        var items = from i in xDoc.Descendants("item")
                    select i;

        foreach (var item in items)
        {
            switch (item.Attribute("name").Value)
            {
                case "Baboon":
                    BaboonDescription = item.Value; // Assigns BaboonDescription the description from xml.
                    break;
                case "Tiger": 
                    TigerDesscription = item.Value; // Assigns TigerDescription the description from xml.
                    break;
                default:
                    break;
            }
        }
    }
}

public class2 : class1
{
    [Description(BaboonDescription)] // problem here. Telling me that I need const string. But i have to get the strings from an xml.
    public string Baboon { get; set; }

    [Description("tiger is bla bla")] // this one works but I want the description from the xml.
    public string Tiger { get; set; }

    [Description(SnakeDescription)] // this also works but I want the description from the xml.
    public string Snake { get; set; }
}

Answer 1

DescriptionAttribute无法编译并且同时处于动态状态。

查看我对此SO问题的回答，该问题演示了如何构建动态类型描述符：Optimize class for PropertyGrid

使用DynamicTypeDescriptor类，您可以构建一个包含所需描述属性的包装类。

如何从xml填充Property的DescriptionAttribute

1 个答案: