ASP.NET MVC Action向视图传值之匿名类型
<p>在利用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范例的值呢，如果不做特殊处理则无法实现。</p><p>接下来我们来看一个示例：</p>
<p>在我们的控制中：</p>
using System.Collections.Generic;
using System.Web.Mvc;
namespace TianYa.DotNetShare.MvcDemo.Controllers
{
public class DemoController : Controller
{
// GET: Demo
public 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();
}
}
}
<p>在我们的视图中：</p>
@{
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)，年事：@(item.Age)。</p>
}
<p>
学号：@(ViewBag.stu.SNo)，姓名：@(ViewBag.stu.Name)，性别：@(ViewBag.stu.Sex)，年事：@(ViewBag.stu.Age)。
</p>
</div>
</body>
</html>
<p>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</p>
<p><div align="center"></div></p>
<p>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。</p>
<p>首先添加一个扩展方法帮助类：</p>
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[重要是匿名对象]转换为dynamic
/// <summary>
/// 将对象[重要是匿名对象]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[重要是匿名对象]转换为List<dynamic>
/// <summary>
/// 将对象[重要是匿名对象]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 将匿名对象添补XML节点
/// <summary>
/// 将匿名对象添补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
}
}
<p>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：</p>
using System.Collections.Generic;
using System.Web.Mvc;
using TianYa.DotNetShare.CommTool;
namespace TianYa.DotNetShare.MvcDemo.Controllers
{
public class DemoController : Controller
{
// GET: Demo
public 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();
}
}
}
<p>处理完后再来访问一下我们的/demo/index</p>
<p><div align="center"></div></p>
<p>可以看出正常显示了，说明我们的传值成功了。</p>
<p>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！！！</p>
<p>demo源码：</p>
链接：https://pan.baidu.com/s/1_EXtKKYBYBFpBf5aDT4ASw
提取码：atem
<p> </p>
<p><strong>版权声明：如有雷同纯属巧合，如有侵权请及时接洽本人修改，谢谢！！！</strong></p><br>来源：<a href="https://www.cnblogs.com/xyh9039/p/11348684.html" target="_blank">https://www.cnblogs.com/xyh9039/p/11348684.html</a><br>免责声明：如果侵犯了您的权益，请联系站长，我们会及时删除侵权内容，谢谢合作！
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