从列表运行时创建对象及其属性 [英] Create Object and its Properties at Run-time from List

问题描述

我需要在运行时创建动态对象及其属性，然后创建此对象的实例来存储值。

为什么我想要超越逻辑！ >

我在C＃中读取excel文件，第一行代码是标题，其实际上是属性，后面是每行都是记录动态对象的实例。

 列表< string> ExcelDataHeader = new List< string>（）; （int y = 2; y< = colCount; y ++）
 
 ExcelDataHeader.Add（xlRange.Cells [headerRow，y] .Value2.ToString（））; 
} 
 
动态MyDynamic = new System.Dynamic.ExpandoObject（）; 
 ??? 
  

我需要在对象中返回excel读取数据

解决方案

你可以使用 ExpandoObject 这里 - 它会工作，但你需要使用字典API：

  IDictionary< string，object> obj = new ExpandoObject（）; 
 obj [id] = 123; 
 obj [name] =Fred; 
 
 //这是动态位：
 dynamic dyn = obj; 
 int id = dyn.id; // 123 
 string name = dyn.name; //Fred
  

但是，我没有看到这一点。既然你不会被C＃代码中的对象引用，例如 obj.PropertyName ， dynamic 目的。您也可以将每个记录存储在 Dictionary< string，object> 或类似文件中。鉴于您所描述的，没有实际使用 MyDynamic 作为动态对象。

I need to create dynamic object and its properties at run-time then create instance of this object to store values.

why I want above logic!

I am reading excel file in C# and first line of code is header which is actually properties and followed by each rows are record which is instance of dynamic object.

 List<string> ExcelDataHeader = new List<string>();
         for (int y = 2; y <= colCount; y++)
           {
             ExcelDataHeader.Add(xlRange.Cells[headerRow, y].Value2.ToString());
           }

  dynamic MyDynamic = new System.Dynamic.ExpandoObject();
    ??????????

I need to return excel read data in object

解决方案

You could use ExpandoObject here - it'll work, but you need to use the dictionary API:

IDictionary<string, object> obj = new ExpandoObject();
obj["id"] = 123;
obj["name"] = "Fred";

// this is the "dynamic" bit:
dynamic dyn = obj;
int id = dyn.id; // 123
string name = dyn.name; // "Fred"

However, I fail to see the point. Since you won't be referring to the object in C# code by things like obj.PropertyName, dynamic has very little purpose. You might as well just store each record in a Dictionary<string,object> or similar. Given what you describe, there are no places where you would actually use MyDynamic as a dynamic object.

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