使用LINQ遍历类属性 [英] Iterating over class properties using LINQ

问题描述

有一个ParsedTemplate类，它具有300多个属性(键入Details和BlockDetails). parsedTemplate对象将由函数填充.填充此对象后，我需要LINQ(或其他方式)来查找是否有任何属性，例如"body"或"img"，其中IsExist=false和Priority="high".

There is a ParsedTemplate class that it has over 300 property (typed Details and BlockDetails). The parsedTemplate object will be fill by a function. After filling this object I need a LINQ (or other way) to find is there any property like "body" or "img" where IsExist=false and Priority="high".

public class Details
{
    public bool IsExist { get; set; }
    public string Priority { get; set; }
}

public class BlockDetails : Details
{
    public string Block { get; set; }
}

public class ParsedTemplate
{
    public BlockDetails body { get; set; }
    public BlockDetails a { get; set; }
    public Details img { get; set; }
    ...
}

推荐答案

您将需要编写自己的方法来使您的开胃菜.幸运的是，它不需要很长.像这样:

You're going to need to write your own method to make this appetizing. Fortunately, it doesn't need to be long. Something like:

static IEnumerable<Details> GetDetails(ParsedTemplate parsedTemplate)
{
    return from p in typeof(ParsedTemplate).GetProperties()
           where typeof(Details).IsAssignableFrom(p.PropertyType)
           select (Details)p.GetValue(parsedTemplate, null);
}

然后，如果您想检查ParsedTemplate对象上是否存在任何属性，则可以使用LINQ:

You could then, if you wanted to check if any property "exists" on a ParsedTemplate object, for example, use LINQ:

var existingDetails = from d in GetDetails(parsedTemplate)
                      where d.IsExist
                      select d;

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