13

我可以将 ExpandoObject 转换为匿名类型吗？

var anoObj = new { name = "testName", email = "testEmail" };

dynamic expandoObj = new System.Dynamic.ExpandoObject();

// Here I'm populating the expandoObj with same property names/types in anonymoustype(anoObj)

// Now, how to convert this ExpandoObject to anonymoustype ?

var newObj = (typeof(anoObj)expandoObj); // This doesn't work

稍后添加

// 这是我的实体

public class Customer
    {
        #region Public Properties

        [ColumnAttribute(Name = "IdColumn")]
        public string Id { get; set; }

        [ColumnAttribute(Name = "NameColumn")]
        public string Name { get; set; }

        [ColumnAttribute(Name = "AddressColumn")]
        public string Address { get; set; }

        [ColumnAttribute(Name = "EmailColumn")]
        public string Email { get; set; }

        [ColumnAttribute(Name = "MobileColumn")]
        public string Mobile { get; set; } 

        #endregion
    }

//------------------------------------------------ -------------------------------------

public class LookupService<TEntitySource>
{
    public LookupService ()
    {

    }

    public LookupShowable<TEntitySource, TSelection> Select<TSelection>(Expression<Func<TEntitySource, TSelection>> expression)
    {
        var lookupShowable = new LookupShowable<TEntitySource, TSelection>();

        return lookupShowable;
    }
}

public class LookupShowable<TEntitySource,TSelection>
{
    public LookupShowable()
    {

    }

    public LookupExecutable<TEntitySource, TSelection, TShow> Show<TShow>(Expression<Func<TEntitySource, TShow>> expression)
    {
        var lookupExecutable = new LookupExecutable<TEntitySource,TSelection,TShow>();

        return lookupExecutable;
    }
}

public class LookupExecutable<TEntitySource, TSelection, TShow>
{
    public TSelection Execute()
    {
       // Here I want to create a new instance of TSelection and populate values from database and return it.
    }
}

//------------------------------------------------ --------------------------------------

// This is How I want to call this from front end...
    var lookupService = new LookupService<Customer>();
    var lookupSelection = lookupService.Select(C => new { C.Id, C.Name, C.Mobile }).Show(C => new { C.Id, C.Name}).Execute();


    string sID = lookupSelection.Id;
    string sName = lookupSelection.Name;
    string sMobile = lookupSelection.Mobile;

不要考虑这个中间部分..它的目的是另一个......

我的问题出在 LookupExecutable 类中的 Execute() 方法中。我不知道如何创建 TSelection 类型的新实例并为其赋值。此 TSelection 类型始终是匿名类型。

4

3 回答 3

7
于 2012-04-20T07:21:22.843 回答
5

使用 JavaScriptSerializer 将 ExpandoObject 转换为任何类型，如下所示：

.....
dynamic myExpandoObject = new ExpandoObject();
var result = ConvertDynamic<myType>(myExpandoObject);
.....


    public T ConvertDynamic<T>(IDictionary<string, object> dictionary)
    {
        var jsSerializer = new System.Web.Script.Serialization.JavaScriptSerializer();
        var obj = jsSerializer.ConvertToType<T>(dictionary);
        return obj;
    }

这应该可以完成这项工作。

于 2014-04-03T05:16:03.230 回答
1

在这里你有一个来自 ExpandoObject 的对象

        var anoObj = new { name = "testName", email = "testEmail" };

        dynamic expandoObj = new System.Dynamic.ExpandoObject();
        object newObj = expandoObj;

但请注意，动态对象在资源方面非常昂贵，而且您所要求的似乎没有任何意义。假设您必须处理动态对象并且想要对它们做一些事情，那么您在评论中提出的问题是一个很好的方法：

dynamic expando = new System.Dynamic.ExpandoObject();

var myObj = new Dictionary<string, object>();

myObj["myProperty"] = expando.myProperty;

任何动态对象都可以轻松转换为类型化字典。

希望有帮助！

于 2012-04-20T07:25:26.883 回答