在使用ASP.NET MVC過程中想必大家都有遇到過一個問題就是我們的Action如何向視圖傳遞匿名類型的值呢，如果不做特殊處理則無法實現。
接下來我們來看一個示例：
在我們的控制中：
using System.Collections.Generic; using System.Web.Mvc;namespace TianYa.DotNetShare.MvcDemo.Controllers {public class DemoController : Controller{// GET: Demopublic ActionResult Index(){var listStu = new List<dynamic>{new{SNo="1000",Name = "張三",Sex = "男",Age =20},new{SNo="1001",Name = "李四",Sex = "男",Age =21}};var stu = new{SNo = "1002",Name = "錢七七",Sex = "女",Age = 20};ViewBag.stu = stu;ViewBag.listStu = listStu;return View();}} }
在我們的視圖中：
@{Layout = null; }<!DOCTYPE html><html> <head><meta name="viewport" content="width=device-width" /><title>Index</title> </head> <body><div>@foreach (var item in ViewBag.listStu){<p>學號：@(item.SNo)，姓名：@(item.Name)，性別：@(item.Sex)，年齡：@(item.Age)。</p>}<p>學號：@(ViewBag.stu.SNo)，姓名：@(ViewBag.stu.Name)，性別：@(ViewBag.stu.Sex)，年齡：@(ViewBag.stu.Age)。</p></div> </body> </html>
然后將網站部署到我們的IIS上面，接下來來訪問一下我們的/demo/index
可以發現報錯了，說明傳值失敗了，那么接下來我們來簡單介紹下如何解決這個問題。
首先添加一個擴展方法幫助類：
using System; using System.Collections.Generic; using System.ComponentModel; using System.Dynamic; using System.Linq; using System.Xml;namespace TianYa.DotNetShare.CommTool {/// <summary>/// 擴展方法/// </summary>public static class ExtentMethod{#region 匿名對象處理#region 將對象[主要是匿名對象]轉換為dynamic/// <summary>/// 將對象[主要是匿名對象]轉換為dynamic/// </summary>public static dynamic ToDynamic(this object value){IDictionary<string, object> expando = new ExpandoObject();var type = value.GetType();var properties = TypeDescriptor.GetProperties(type);foreach (PropertyDescriptor property in properties){var val = property.GetValue(value);if (property.PropertyType.FullName.StartsWith("<>f__AnonymousType")){dynamic dval = val.ToDynamic();expando.Add(property.Name, dval);}else{expando.Add(property.Name, val);}}return expando as ExpandoObject;}#endregion#region 將對象[主要是匿名對象]轉換為List<dynamic>/// <summary>/// 將對象[主要是匿名對象]轉換為List<dynamic>/// </summary>public static List<dynamic> ToDynamicList(this IEnumerable<dynamic> values){var list = new List<dynamic>();if (values != null){if (values.Any()){list.AddRange(values.Select(v => ((object)v).ToDynamic()));}}return list;}#endregion#region 將匿名對象集合轉換為XML/// <summary>/// 將匿名對象集合轉換為XML/// </summary>public static XmlDocument ListObjertToXML(this IEnumerable<dynamic> values){var xmlDoc = new XmlDocument();var xmlElem = xmlDoc.CreateElement("DocumentElement");xmlDoc.AppendChild(xmlElem);if (values != null){if (values.Any()){var node = xmlDoc.SelectSingleNode("DocumentElement");foreach (var item in values){var xmlRow = xmlDoc.CreateElement("Row");ObjectToXML(item, xmlDoc, xmlRow);node.AppendChild(xmlRow);}}}return xmlDoc;}#endregion#region 將匿名對象填充XML節點/// <summary>/// 將匿名對象填充XML節點/// </summary>private static void ObjectToXML(object value, XmlDocument xmlDoc, XmlElement xmlRow){IDictionary<string, object> expando = new ExpandoObject();var type = value.GetType();var properties = TypeDescriptor.GetProperties(type);foreach (PropertyDescriptor property in properties){var val = property.GetValue(value);xmlRow.CloneNode(false);var xmlTemp = xmlDoc.CreateElement(property.Name);XmlText xmlText;if (property.PropertyType.FullName.StartsWith("<>f__AnonymousType")){dynamic dval = val.ToDynamic();xmlText = xmlDoc.CreateTextNode(dval.ObjectToString());}else{xmlText = xmlDoc.CreateTextNode(val.ToString());}xmlTemp.AppendChild(xmlText);xmlRow.AppendChild(xmlTemp);}}#endregion#endregion} }
然后對我們的控制器做一些調整，增加調用我們的擴展方法：
using System.Collections.Generic; using System.Web.Mvc;using TianYa.DotNetShare.CommTool;namespace TianYa.DotNetShare.MvcDemo.Controllers {public class DemoController : Controller{// GET: Demopublic ActionResult Index(){var listStu = new List<dynamic>{new{SNo="1000",Name = "張三",Sex = "男",Age =20},new{SNo="1001",Name = "李四",Sex = "男",Age =21}};var stu = new{SNo = "1002",Name = "錢七七",Sex = "女",Age = 20};ViewBag.stu = stu.ToDynamic();ViewBag.listStu = listStu.ToDynamicList();return View();}} }
處理完后再來訪問一下我們的/demo/index
可以看出正常顯示了，說明我們的傳值成功了。
至此，本章就介紹完了，如果你覺得這篇文章對你有所幫助請記得點贊哦，謝謝！！！
demo源碼：
鏈接：https://pan.baidu.com/s/1_EXtKKYBYBFpBf5aDT4ASw 提取碼：atem
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