Question

我试图遍历我的EF实体代码第一个对象的所有属性。我只想要我定义的属性。但是当我这样做时，它包括一个属性 “RelationshipManager”，我真的不想要。

这是对象：

public class SchoolYear
{
        [Key]
        public virtual int SchoolYearId { get; set; }
        public virtual string SchoolYearName { get; set; }
}

以下是代码：

 public static string plistFromObject<T>(List<T> data)
 {
            string plist = "";

            plist = plist + "<array>\r\n";

            foreach (var item in data)
            {
                // I want to exclude "relationshipmanager"

                List<string> props = item.GetType().GetProperties(BindingFlags.DeclaredOnly |     BindingFlags.Public | BindingFlags.Instance).Select(p => p.Name).ToList();

                plist = plist + "<dict>\r\n";

               foreach (var prop in props)
               {
                   var val = item.GetType().GetProperty(prop).GetValue(item, null).ToString();

                   plist = plist + "<key>" + prop + "</key>\r\n";
                   plist = plist + "<string>" + System.Web.HttpUtility.HtmlEncode(val) + "</string>\r\n";
               }

            plist = plist + "</dict>\r\n";
        }

        return plist;
    }

电话

    [WebMethod]
    public string GetSchoolYears()
    {
        var db = new MyEntities();

        var results = (from i in db.SchoolYears
                       select i).ToList();


        return Library.Common.plistFromObject(results);
    }

Answer 1

试试这样：

var xml = new XElement(
        "array", 
        data.Select(d => 
           new XElement("dict",
            d.GetType().GetProperties(BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.Instance)
            .Where(p => p.Name != "RelationshipManager")
            .Select(
                p => new [] { 
                    new XElement("key",p.Name), 
                    new XElement("string", p.GetValue(d, null)) }
            )
        )
    ));

请参阅demo。

答案是EF不能与你的类完全一致，但是使用特殊的动态生成代理类，所以即使你没有这样的属性，EF也可以添加它。查看更多details。

Answer 2

使用Tony的回答：我能够这样做，而不必过滤掉EF动态属性。这将获得对象的实际类型

 var xml = new XElement(
                        "array",
                        data.Select(d =>
                        new XElement("dict",ObjectContext.GetObjectType(d.GetType   ()).GetProperties(BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.Instance)

                                                .Select(
                                                 p => new[] { 
                                                 new XElement("key",p.Name), 
                                                    new XElement("string", p.GetValue(d, null)) }
                                                        )
                                            )
                                 ));

EF对象的GetProperties：需要忽略“RelationshipManager”

2 个答案: