搜索所有字符串属性

本文关键字：属性 字符串 搜索 | 更新日期: 2023-09-27 18:05:30

是否无论如何都要改变"Where"，其中它将自动检查包含字符串的所有属性，而不是手动添加每个属性名称?

 items.Where(m => m.Property1.IndexOf(word, StringComparison.CurrentCultureIgnoreCase) >= 0
                                || m.Property2.IndexOf(word, StringComparison.CurrentCultureIgnoreCase) >= 0
                                || m.Property3.IndexOf(word, StringComparison.CurrentCultureIgnoreCase) >= 0
                                || m.Property4?.IndexOf(word, StringComparison.CurrentCultureIgnoreCase) >= 0
                                || m.Property5?.IndexOf(word, StringComparison.CurrentCultureIgnoreCase) >= 0
                                || m.Property6.IndexOf(word, StringComparison.CurrentCultureIgnoreCase) >= 0
                                || m.Property7?.IndexOf(word, StringComparison.CurrentCultureIgnoreCase) >= 0
                                ));

谢谢。

搜索所有字符串属性

我会用反射写代码…

public bool MyContains(object instance, string word)
{
        return instance.GetType()
                .GetProperties()
                .Where(x => x.PropertyType == typeof(string))
                .Select(x => (string)x.GetValue(instance, null))
                .Where(x => x != null)
                .Any(x => x.IndexOf(word, StringComparison.CurrentCultureIgnoreCase) >= 0);
}

那么你的代码就是

items.Where(m=>MyContains(m,word));

基于L.B的回答:我接受了他的回答

我把它分解成两个函数，因为不需要getwhere.

中每个实例的字符串属性
public static class ObjectUtils
{
    public static IEnumerable<PropertyInfo> GetPropertiesByType<TEntity>(TEntity entity, Type type)
        {
            return entity.GetType().GetProperties().Where(p => p.PropertyType == type); 
        }
    public static bool CheckAllStringProperties<TEntity>(TEntity instance, IEnumerable<PropertyInfo> stringProperties, string word)
        {
            return stringProperties.Select(x => (string)x.GetValue(instance, null))
                .Where(x => x != null)
                .Any(x => x.IndexOf(word, StringComparison.CurrentCultureIgnoreCase) >= 0);
        }
}
然后

var stringProperties = ObjectUtils.GetPropertiesByType(new Item(), typeof(string)); 
 items.Where(x => ObjectUtils.CheckAllStringProperties(x, stringProperties, word)));
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