项目背景：在.net framework下使用asp.net webform，特别是aspx+ajax+ashx中，ashx后台代码获取传入参数的时候，需要很多[“…”]，我用dynamic对他进行包装。

废话不多说，上代码（文章最下面有上传打包代码）：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

namespace MyWebDemo

{

    public partial class UserList : System.Web.UI.Page

    {

        /// <summary>

        /// StevemChennet@live.com qq:38798579

        /// http://www.cnblogs.com/stevenchennet

        /// </summary>

        protected void Page_Load(object sender, EventArgs e)

        {

            //

            // 这是以前的做法，这些["parameter"]很费劲

            //

            //HttpContext context = HttpContext.Current;

            //if (!this.IsPostBack)

            //{

            //    // http://localhost:20000/UserList.aspx?id=1&name=StevenChennet

            //    int id = int.Parse(context.Request.Params["id"]);

            //    
            //    string name = context.Request.Params["nAMe"];

            //    this.lbl.InnerText = string.Format("Get提交 id:{0} name:{1}", id, name);

            //}

            //else

            //{

            //    // form post

            //    int age = int.Parse(context.Request.Form["age"]);

            //    string address = context.Request.Form["AddRESS"];

            //    this.lbl.InnerText = string.Format("Post提交 age:{0} address:{1}", age, address);

            //}

            dynamic dContext = new DynamicHttpContext(HttpContext.Current);

            if (!this.IsPostBack)

            {

                // http://localhost:20000/UserList.aspx?id=1&name=StevenChennet

                int id = dContext.id;

                // nAMe也可以用Name,忽略大小写的,这里故意写成nAMe意思是忽略大小写。
                string name = dContext.nAMe;

                this.lbl.InnerText = string.Format("Get提交 id:{0} name:{1}", id, name);

            }

            else

            {

                // form post

                int age = dContext.Age;

                string address = dContext.AddRESS;

                this.lbl.InnerText = string.Format("Post提交 age:{0} address:{1}", age, address);

            }

        }

    }

}

下面是实现的代码

using System;

using System.Collections.Generic;

using System.Dynamic;

using System.Linq;

using System.Web;

namespace System.Web

{

    /// <summary>

    /// StevemChennet@live.com qq:38798579

    /// http://www.cnblogs.com/stevenchennet

    /// </summary>

    public class DynamicHttpContext : DynamicObject

    {

        private string keyContent;

        private HttpContext httpContext;

        public DynamicHttpContext(HttpContext context)

        {

            this.httpContext = context;

        }

        public override bool TryGetMember(GetMemberBinder binder, out object result)

        {

            string key = binder.Name;

            if (httpContext.Request.HttpMethod == "GET")

            {

                this.keyContent = this.httpContext.Request.QueryString.Get(key);

            }

            else

            {

                this.keyContent = this.httpContext.Request.Form.Get(key);

            }

            result = this;

            return true;

        }

        public override bool TryConvert(ConvertBinder binder, out object result)

        {

            result = null;

            Type binderType = binder.Type;

            //int

            if (binderType == typeof(int))

            {

                result = int.Parse(this.keyContent);

            }

            else if (binderType == typeof(int?))

            {

                if (string.IsNullOrWhiteSpace(this.keyContent))

                {

                    result = int.Parse(this.keyContent);

                }

                else

                {

                    result = default(int?);

                }

            }

            // bool

            else if (binderType == typeof(bool))

            {

                result = bool.Parse(this.keyContent);

            }

            else if (binderType == typeof(bool?))

            {

                if (string.IsNullOrWhiteSpace(this.keyContent))

                {

                    result = bool.Parse(this.keyContent);

                }

                else

                {

                    result = default(bool?);

                }

            }

            // datetime

            else if (binderType == typeof(DateTime))

            {

                result = DateTime.Parse(this.keyContent);

            }

            else if (binderType == typeof(DateTime?))

            {

                if (string.IsNullOrWhiteSpace(this.keyContent))

                {

                    result = DateTime.Parse(this.keyContent);

                }

                else

                {

                    result = default(DateTime?);

                }

            }

            // string

            else if (binderType == typeof(string))

            {

                result = this.keyContent;

            }

            else

            {

                throw new NotSupportedException(string.Format("类型 {0} 还未实现，请添加转换代码", binderType.ToString()));

            }

            return true;

        }

    }

}

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代码打包下载（VS2013）

http://files.cnblogs.com/StevenChennet/AppDomainPerformanceDemo.zip