在使用ASP.NET MVC过程中想必大家都有遇到过一个问题就是我们的Action如何向视图传递匿名类型的值呢，如果不做特殊处理则无法实现。
接下来我们来看一个示例：
在我们的控制中：
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 = "张三",Sex = "男",Age =20},new{SNo="1001",Name = "李四",Sex = "男",Age =21}};var stu = new{SNo = "1002",Name = "钱七七",Sex = "女",Age = 20};ViewBag.stu = stu;ViewBag.listStu = listStu;return View();}} }
在我们的视图中：
@{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>学号：@(item.SNo)，姓名：@(item.Name)，性别：@(item.Sex)，年龄：@(item.Age)。</p>}<p>学号：@(ViewBag.stu.SNo)，姓名：@(ViewBag.stu.Name)，性别：@(ViewBag.stu.Sex)，年龄：@(ViewBag.stu.Age)。</p></div> </body> </html>
然后将网站部署到我们的IIS上面，接下来来访问一下我们的/demo/index
可以发现报错了，说明传值失败了，那么接下来我们来简单介绍下如何解决这个问题。
首先添加一个扩展方法帮助类：
using System; using System.Collections.Generic; using System.ComponentModel; using System.Dynamic; using System.Linq; using System.Xml;namespace TianYa.DotNetShare.CommTool {/// <summary>/// 扩展方法/// </summary>public static class ExtentMethod{#region 匿名对象处理#region 将对象[主要是匿名对象]转换为dynamic/// <summary>/// 将对象[主要是匿名对象]转换为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 将对象[主要是匿名对象]转换为List<dynamic>/// <summary>/// 将对象[主要是匿名对象]转换为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 将匿名对象集合转换为XML/// <summary>/// 将匿名对象集合转换为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 将匿名对象填充XML节点/// <summary>/// 将匿名对象填充XML节点/// </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} }
然后对我们的控制器做一些调整，增加调用我们的扩展方法：
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 = "张三",Sex = "男",Age =20},new{SNo="1001",Name = "李四",Sex = "男",Age =21}};var stu = new{SNo = "1002",Name = "钱七七",Sex = "女",Age = 20};ViewBag.stu = stu.ToDynamic();ViewBag.listStu = listStu.ToDynamicList();return View();}} }
处理完后再来访问一下我们的/demo/index
可以看出正常显示了，说明我们的传值成功了。
至此，本章就介绍完了，如果你觉得这篇文章对你有所帮助请记得点赞哦，谢谢！！！
demo源码：
链接：https://pan.baidu.com/s/1_EXtKKYBYBFpBf5aDT4ASw 提取码：atem
版权声明：如有雷同纯属巧合，如有侵权请及时联系本人修改，谢谢！！！
