WebApi model自动绑定 typeconvert

Controller 


using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using System.Web.Http.Controllers;
using WebApi.Models;

namespace WebApi.Controllers
{
    [RoutePrefix("api/demo")]
    public class DemoController : ApiController
    {

        [HttpGet]
        [Route("action2/{model}")]
        public Point Action2(Point model)
        {
            return model;
        }
    }
}

自定义Converter

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;
using System.Linq;
using System.Web;

namespace WebApi
{
    public class PointTypeConverter : TypeConverter
    {
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) //是否可以转换
        {
            return sourceType == typeof(string);
        }
        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) //转换成什么类型
        {
            if(value is string)
            {
                return Point.ParsePoint(value as string);
            }
            return base.ConvertFrom(context, culture, value);
        }
    }
}

自定义 Model

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Runtime.Serialization;
using System.Web;
using System.Web.Http.ModelBinding;

namespace WebApi
{
    [TypeConverter(typeof(PointTypeConverter))]
    public class Point
    {
        public double X { get; set; }
        public double Y { get; set; }

        public static Point ParsePoint(string value)
        {
            var split = value.Split(',');
            if (split.Length != 2)
            {
                throw new FormatException("Invalid Point Expression");
            }
            double x;
            double y;
            if(!double.TryParse(split[0],out x)|| !double.TryParse(split[1], out y))
            {
                throw new FormatException("Invalid Point Expression");
            }
            var point = new Point();
            point.X = x;
            point.Y = y;
            return point;
        }
    }
}

　　

 

调用的URI

 

http://localhost:20137/api/demo/action2/123,456