Javascript SQL Server中的间距文本不匹配

嗨，我是新的ASP.NET MVC。我的JavaScript代码有问题。
我正在尝试筛选下拉列表，以空格文本。我正在使用 多个代码，但结果失败，请检查下图。 请帮帮我

因为我的项目时间很短，谢谢你的提前

查看

SQL Server数据库

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尝试更新这行代码

 v += "<option value=" + v1.Value + ">" + v1.Text + "</option>";

v+=“v1.Text+”；

对此

 v += "<option value=\"" + v1.Value + "\">" + v1.Text + "</option>";

v+=“v1.Text+”；

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;

namespace dropdownlist.data_access_layer
{
    public class db
    {
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString);

        //Get Country
        public DataSet Get_Country()
        {
            SqlCommand com = new SqlCommand("select distinct(city) as city from vehicle", con);
            SqlDataAdapter da = new SqlDataAdapter(com);
            DataSet ds = new DataSet();
            da.Fill(ds);
            return ds;

        }
        //Get Address
        public DataSet Get_A_Add(string city)
        {
            SqlCommand com = new SqlCommand("select distinct(a_address) as address2 from vehicle where city='"+city+"'", con);
            SqlDataAdapter da = new SqlDataAdapter(com);
            DataSet ds = new DataSet();
            da.Fill(ds);
            return ds;

        }

        //Get Address
        public DataSet Get_B_Add(string add)
        {
            SqlCommand com = new SqlCommand("select distinct(b_address) as add1 from vehicle where a_address='"+add+"'", con);
            SqlDataAdapter da = new SqlDataAdapter(com);
            DataSet ds = new DataSet();
            da.Fill(ds);
            return ds;

        }
    }
}

 v += "<option value=" + v1.Value + ">" + v1.Text + "</option>";

 v += "<option value=\"" + v1.Value + "\">" + v1.Text + "</option>";