Question

我目前正在研究一个asp.net mvc项目，该项目允许用户从日历中仅选择可用日期以预订特定服务。我目前有一个Datepicker.cs模型，其中包含一个DateTime Date字段和一个int Id字段，并且我有一个DbContext类，用于持久化和检索此数据


import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import java.util.Calendar;
import java.util.Date;

public class Database_title extends SQLiteOpenHelper {

    Date currentTime = Calendar.getInstance().getTime();

    private static final String Database_Name = "DatabaseDias.db";

    private static final String TABLE_NAME_1 = "main";
    private static final String TABLE_NAME_2 = "title";
    private static final String TABLE_NAME_3 = "events";

    private static final String COL1_1 = "ID";
    private static final String COL1_2 = "prs_nmb";
    private static final String COL1_3 = "pd";
    private static final String COL1_4 = "groupp";
    private static final String COL1_5 = "userid";
    private static final String COL1_6 = "passw";

    private static final String COL2_1 = "ID";
    private static final String COL2_2 = "prs_nmb";
    private static final String COL2_3 = "pd";
    private static final String COL2_4 = "groupp";
    private static final String COL2_5 = "date";
    private static final String COL2_6 = "cd_omd";
    private static final String COL2_7 = "area";
    private static final String COL2_8 = "daily_shf";
    private static final String COL2_9 = "chief";
    private static final String COL2_10 = "veh_type";
    private static final String COL2_11 = "driver_A";
    private static final String COL2_12 = "co_driver_A";
    private static final String COL2_13 = "veh_A";
    private static final String COL2_14 = "km_A";
    private static final String COL2_15 = "fuel_A";
    private static final String COL2_16 = "driver_B";
    private static final String COL2_17 = "co_driver_B";
    private static final String COL2_18 = "veh_B";
    private static final String COL2_19 = "km_B";
    private static final String COL2_20 = "fuel_B";

    private static final String COL3_1 = "ID";
    private static final String COL3_2 = "date";
    private static final String COL3_3 = "cd_omadas";
    private static final String COL3_4 = "orig_event";
    private static final String COL3_5 = "address";
    private static final String COL3_6 = "announcer";
    private static final String COL3_7 = "Events_descr";


    public Database_title(Context context) {
        super(context, Database_Name, null, 1);
        Log.d("Database Operations", "Database created...");
    }



    @Override
    public void onCreate(SQLiteDatabase db) {
        String createTable_1 = "CREATE TABLE " + TABLE_NAME_1 + "(" + COL1_1 +" INTEGER PRIMARY KEY AUTOINCREMENT,"+ COL1_2 +" INTEGER,"+ COL1_3 +" TEXT,"+ COL1_4 +" TEXT,"+ COL1_5 +" TEXT,"+ COL1_6 +" TEXT)";
        String createTable_2 = "CREATE TABLE " + TABLE_NAME_2 + "(" + COL2_1 +" INTEGER PRIMARY KEY AUTOINCREMENT,"+ COL2_2 +" INTEGER,"+ COL2_3 +" TEXT,"+ COL2_4 +" TEXT,"+ COL2_5 +" TEXT,"+ COL2_6 +" TEXT,"+ COL2_7 +" TEXT,"+ COL2_8 +" TEXT,"+ COL2_9 +" TEXT,"+ COL2_10 +" TEXT,"+ COL2_11 +" TEXT,"+ COL2_12 +" TEXT,"+ COL2_13 +" TEXT,"+ COL2_14 +" TEXT,"+ COL2_15 +" TEXT,"+ COL2_16 +" TEXT,"+ COL2_17 +" TEXT,"+ COL2_18 +" TEXT,"+ COL2_19 +" TEXT,"+ COL2_20 +" TEXT)";
        String createTable_3 = "CREATE TABLE " + TABLE_NAME_3 + "(" + COL3_1 +" INTEGER PRIMARY KEY AUTOINCREMENT,"+ COL3_2 +" INTEGER,"+ COL3_3 +" TEXT,"+ COL3_4 +" TEXT,"+ COL3_5 +" TEXT,"+ COL3_6 +" TEXT,"+ COL3_7 +" TEXT)";

        db.execSQL(createTable_1);
        db.execSQL(createTable_2);
        db.execSQL(createTable_3);

        Log.d(Database_Name, "Hello onCreate(SQLiteDatabase db) " );
    }
    @Override
    public void onUpgrade(SQLiteDatabase db, int i, int i1) {
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME_1);
        onCreate(db);
        Log.d(Database_Name, "Hello onUpgrade(SQLiteDatabase db, int i, int i1) " );
    }
    public boolean addData_main(String item_1,String item_2,String item_3,String item_4,String item_5) {
        SQLiteDatabase db = this.getWritableDatabase();
        ContentValues contentValues = new ContentValues();
        contentValues.put(COL1_2, item_1);
        contentValues.put(COL1_3, item_2);
        contentValues.put(COL1_4, item_3);
        contentValues.put(COL1_5, item_4);
        contentValues.put(COL1_6, item_5);
        long result = db.insert(TABLE_NAME_1, null, contentValues);

        if (result == -1) {
            return false;
        }else{
            return true;
        }
    }

    public Cursor getAllData_main() {
        SQLiteDatabase db = this.getWritableDatabase();
        Cursor res = db.rawQuery("select * from " + TABLE_NAME_1, null);
        return res;
    }
    /*
    public Cursor getData(String Col,String table_name){
        SQLiteDatabase db = this.getWritableDatabase();
        String query = "SELECT * FROM " + table_name;
        Cursor data = db.rawQuery(query, null);
        return data;
    }
    */


    public Cursor getItemID(String name){
        SQLiteDatabase db = this.getWritableDatabase();
        String query = "SELECT " + COL1_1 + " FROM " + TABLE_NAME_1 +
                " WHERE " + COL1_2 + " = '" + name + "'";
        Cursor data = db.rawQuery(query, null);
        return data;
    }

    public boolean updateName_main(String prs_nmb, String pd, String groupp,String userid,String pass){
        SQLiteDatabase db = this.getWritableDatabase();
        ContentValues contentValues = new ContentValues();
        //contentValues.put(COL1_1,"1");
        contentValues.put(COL1_2,prs_nmb);
        contentValues.put(COL1_3,pd);
        contentValues.put(COL1_4,groupp);
        contentValues.put(COL1_5,userid);
        contentValues.put(COL1_6,pass);
        db.update(TABLE_NAME_1,contentValues,"ID = 1",null);
        return true;
    }



    public void deleteName(int id, String name){
        SQLiteDatabase db = this.getWritableDatabase();
        String query = "DELETE FROM " + TABLE_NAME_1 + " WHERE "
                + COL1_1 + " = '" + id + "'" +
                " AND " + COL1_2 + " = '" + name + "'";
        Log.d(Database_Name, "deleteName: query: " + query);
        Log.d(Database_Name, "deleteName: Deleting " + name + " from database.");
        db.execSQL(query);
    }
}

我正在Create.cshtml页面上使用jQuery UI Datepicker向用户显示可用日期。当前，日历显示2个硬编码的可用日期。

a busy cat

现在我的问题是，是否有可能在asp.net mvc框架中用Datepickers Db的Date列中的所有日期填充此硬编码数组（甚至列表等）？即我需要日历来显示数据库中所有可用的日期

任何帮助将不胜感激！

我的Datepicker模型：

namespace Calendar.Models
{
  public class CalendarDb : DbContext
  {
    public DbSet<Datepicker> Dates { get; set; }
  }
}

该视图的控制器：

namespace Calendar.Models
{
  public class Datepicker
  {
    public DateTime DtmDate { get; set; }
    public int Id { get; set; }
    public int UserId { get; set; }
  }
}

我的Create.cshtml视图原样：

    [HttpGet]
    public ActionResult Create()
    {
       var model = _db.Dates.ToList();
       return View(model);
    }

Answer 1

由于控制器中的行var model = _db.Dates.ToList();，您的模型类型是一个列表。您需要调整视图的模型声明以使其匹配。

更改

@model Calendar.Models.Datepicker

到

@model List<Calendar.Models.Datepicker>

现在，您的模型属于正确的类型，您可以将日期嵌入到JavaScript中。我们需要使用Linq选择日期，并将其转换为JS期望的正确字符串格式，然后使用一些字符串方法将它们连接在一起。更改此：

var enableDays = ["11-07-2019", "12-07-2019"];

到

var enableDays = [' @Html.Raw(string.Join("','", Model.Select(d => d.DtmDate.ToString("MM-dd-yyyy"))) '];

然后全部运行。在呈现的HTML中，您应该看到很好地嵌入到JavaScript中的数据库中的日期，这应该在datepicker中启用正确的日期。显然，您需要处理一些极端情况，例如表中没有行，或者其中一行中的日期为null。但这应该可以帮助您入门。

Answer 2

这是您如何做到的想法。

首先创建一个返回List<DateTime>的方法例子

 [HttpPost]
    public ActionResult GetDates()
    {

        return Json(CalendarDb.Dates.Select(x=> x.DtmDate.ToString("dd-MM-yyyy")));
    }

现在，当您创建日期选择程序时，您将需要此列表，例如enableDays

var enableDays = [];
 $.ajax({
  url: "/GetDates",
  method: "POST" ,// post or get
  async: false,
  success:function(dates){ enableDays =dates; }
});

// now create your DatePicker.

现在，如果您要使用mvc modol解决方案，可以这样做。

创建一个包含日期的modol，然后简单地将其转换为json

enableDays  =@Html.Raw(Json.Encode(modol.Dates.ToString("dd-MM-yyyy")))
// now create your DatePicker.

从数据库列填充列表

2 个答案: