Question

有没有人知道如何解决此错误消息

错误CS1729：'SQLiteConnection'不包含带有1个参数的构造函数（CS1729）

这是正在发生的文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using SQLite;
using Android.Util;

using SQLite.Net;

namespace CPDEP1
{
    public class DataBase
    {
        string folder = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
        public bool createDataBase()
        {
            try
            {
                using (var connection = new SQLiteConnection(System.IO.Path.Combine(folder, "Persons.db")));
                {
                    connection.CreateTable<Person>();
                    return true;
                }
            }
            catch(SQLiteException ex)
            {
                Log.Info("SQLiteEx", ex.Message);
                return false;
            }
        }

        public bool insertIntoTablePerson(Person person)
        {
            try
            {
                using (var connection = new SQLiteConnection(System.IO.Path.Combine(folder, "Persons.db")))
                {
                    connection.Insert(person);
                    return true;
                }
            }
            catch(SQLiteException ex)
            {
                Log.Info("SQLiteEx", ex.Message);
                return false;
            }
        }

        public List<Person> selectTablePerson()
        {
            try
            {
                using (var connection = new SQLiteConnection(System.IO.Path.Combine(folder, "Persons.db")))
                {
                    return connection.Table<Person>().ToList();

                }
            }
            catch (SQLiteException ex)
            {
                Log.Info("SQLiteEx", ex.Message);
                return null;
            }
        }

        public bool updateTablePerson(Person person)
        {
            try
            {
                using (var connection = new SQLiteConnection(System.IO.Path.Combine(folder, "Persons.db")))
                {
                    connection.Query<Person>("UPDATE Person set Nom=?,Prenom=?,Telephone=?,Addresse=?,Courriel=?,Cin=? Where Id=?,",person.Nom,person.Prennom,person.Telephone,person.Addresse,person.Courriel,person.Cin,person.Id);
                    return true;
                }
            }
            catch (SQLiteException ex)
            {
                Log.Info("SQLiteEx", ex.Message);
                return false;
            }
        }

        public bool deleteTablePerson(Person person)
        {
            try
            {
                using (var connection = new SQLiteConnection(System.IO.Path.Combine(folder, "Persons.db")))
                {
                    connection.Delete(person);
                    return true;
                }
            }
            catch (SQLiteException ex)
            {
                Log.Info("SQLiteEx", ex.Message);
                return false;
            }
        }

        public bool selectQueryTablePerson(int Id)
        {
            try
            {
                using (var connection = new SQLiteConnection(System.IO.Path.Combine(folder, "Persons.db")))
                {
                    connection.Query<Person>("SELECT * FROM Person Where Id=?", Id);
                    return true;
                }
            }
            catch (SQLiteException ex)
            {
                Log.Info("SQLiteEx", ex.Message);
                return false;
            }
        }

    }
}

提前感谢您的帮助

Answer 1

我按照这里的说明：https://wolfprogrammer.com/2016/09/10/adding-a-sqlite-database-to-xamarin-forms/并得到了同样的错误。

然后我在这里提到了Microsoft指令（https://msdn.microsoft.com/en-us/magazine/mt736454.aspx），并注意到Frank Krueger写的两个非常相似的东西。请检查下面的图像，下载以绿色突出显示的图像，而不是红色图像。

：错误CS1729：'SQLiteConnection'不包含带有1个参数的构造函数（CS1729）

1 个答案: