Question

我有一个文本框，用户在其中输入他需要搜索的字符串。如果用户仅输入一个单词字符串，那么我可以从数据库中检索正确的数据，但是如果用户输入一个多单词字符串，则我的代码将失败。

我正在使用EntityFramework来获取数据。

这是我的代码，用于使用单个单词字符串获取数据。

public ActionResult SearchResult(string search)
{
   var j = objCon.Mobiles.Where(oh => oh.MobileName.Contains(search) || oh.Description.Contains(search));
   List<Mobiles> prod = new List<Mobiles>();
   foreach (var p in j)
   {
       Mobiles Mob = new Mobiles();
       Mob.Description = p.Description;
       Mob.ImgUrl = p.Url;
       Mob.MobileName = p.MobileName;
       Mob.Price = Convert.ToString(p.Price);
       Mob.SlNo = p.SlNo;
       prod.Add(Mob);
   }

   return View("~/Views/Product/Index.cshtml", prod);
}

我尝试使用split将字符串拆分成单个单词，但无法获取正确的数据。

string str = null;
string[] strArr = null;
int count = 0;
str = //UserInput;
char[] splitchar = { ' ' };
strArr = str.Split(splitchar);

Answer 1

string str = null;
        string[] strArr = null;
        int count = 0;
        str = search;
        char[] splitchar = { ' ' };
        strArr = str.Split(splitchar);
        for (count = 0; count <= strArr.Length - 1; count++)
        {
            string i = strArr[count];
            var j = objCon.Mobiles.Where(oh => oh.MobileName.Contains(i) || oh.Description.Contains(i));
            //MessageBox.Show(strArr[count]); 
            foreach (var p in j)
            {
                Mobiles Mob = new Mobiles();
                Mob.Description = p.Description;
                Mob.ImgUrl = p.Url;
                Mob.MobileName = p.MobileName;
                Mob.Price = Convert.ToString(p.Price);
                Mob.SlNo = p.SlNo;
                prod.Add(Mob);
            }
        }

在我帮助您解决问题的过程中-这是最终代码

Answer 2

我写了一个例子来解决您的问题。希望您将从守则中受益。

首先创建移动类：

 public class Mobile
        {
            public int Id { get; set; }

            public string Name { get; set; }

            public string Description { get; set; }
        }

下一步创建扩展方法以检查是否存在值：

public static bool ContainsAny(this string haystack, params string[] needles)
        {
            foreach (var needle in needles)
            {
                if (haystack.Contains(needle))    
                    return true;
            }

            return false;
        }

最后创建主体和测试数据：

using System;
using System.Collections.Generic;
using System.Linq;

namespace StackOverFlow
{
    static class Program
    {
        static void Main()
        {
            List<Mobile> mobiles = new List<Mobile>
            {
                new Mobile{Id = 1,Name = "samsung galaxy s3",Description = "model"},
                new Mobile{Id = 2,Name = "nokia N67",Description = "nokia n96 time"},
                new Mobile{Id = 3,Name = "iphone 5s",Description = "test"},
                new Mobile{Id = 4,Name = "samsung galaxy packet",Description = "this time"},
                new Mobile{Id = 5,Name = "iphone ipad",Description = "now"},
                new Mobile{Id = 6,Name = "glx c5",Description = "time"},
            };

            string[] search = "galaxy time 5s".Split(' ');

            var result = mobiles.Where(c => c.Name.ContainsAny(search) ||
                                            c.Description.ContainsAny(search)).ToList();

            foreach (var item in result)
            {
                Console.WriteLine(item.Id + "-" + item.Name + "-" + item.Description);
            }

            Console.ReadKey();
        }

在MVC 4中实现搜索

2 个答案: