System.Data.Linq.dll 中发生了 'System.Data.SqlServerCe.SqlCeException' 类型的未处理异常

Question

我收到以下错误，我不知道为什么，因为我的应用程序运行 4 小时前是正常的，但现在不工作了，我没有做任何更改..

An unhandled exception of type 'System.Data.SqlServerCe.SqlCeException' occurred in System.Data.Linq.dll

我在行 db.SubmitChanges(); 中收到错误。我将完整代码留在下面。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using System.IO.IsolatedStorage;
using System.IO;
using Microsoft.Phone.Shell;
using System.ComponentModel;
using System.Data.Linq;
using System.Collections.ObjectModel;

namespace Aplicativo_Windows_Phone
{
    public partial class AddColetor : PhoneApplicationPage
    {
        string email;

        public AddColetor()
        {
            InitializeComponent();
        }

        protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
        {
            base.OnNavigatedTo(e);
            NavigationContext.QueryString.TryGetValue("email", out email);
        }

        private void btnAdd_Click_1(object sender, RoutedEventArgs e)
        {
            AppDataContext db = new AppDataContext();
            Coletor coletor = new Coletor();
            if (rdNorte.IsChecked == true)
            {
                coletor.Latitude = Convert.ToInt32(txtLat.Text);
            }
            else
            {
                coletor.Latitude = Convert.ToInt32(txtLat.Text) - (2 * Convert.ToInt32(txtLat.Text));
            }

            if (rdLeste.IsChecked == true)
            {
                coletor.Longitude = Convert.ToInt32(txtLong.Text);
            }
            else
            {
                coletor.Longitude = Convert.ToInt32(txtLong.Text) - (2 * Convert.ToInt32(txtLong.Text));
            }

            if (txtLat.Text != "" && txtLong.Text != "" && rdNorte.IsChecked == true || rdSul.IsChecked == true && rdLeste.IsChecked == true || rdOeste.IsChecked == true)
            {
                foreach (var pessoa in db.Pessoas)
                {
                    if (pessoa.Email == email)
                    {
                        pessoa.Coletores.Add(coletor);
                    }
                }

                db.Coletores.InsertOnSubmit(coletor);
                db.SubmitChanges();

                NavigationService.Navigate(new Uri("/ColetoresPage.xaml", UriKind.RelativeOrAbsolute));
            }
            else
            {
                MessageBox.Show("Preencha todos os campos e marque as opções para adicionar um coletor");
            }
        }

        private void btnCancel_Click_1(object sender, RoutedEventArgs e)
        {
            NavigationService.Navigate(new Uri("/ColetoresPage.xaml", UriKind.RelativeOrAbsolute));
        }

    }
}

Coletor class:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.Linq.Mapping;
using System.Data.Linq;
using Microsoft.Phone.Data.Linq;
using Microsoft.Phone.Data.Linq.Mapping;

namespace Aplicativo_Windows_Phone
{
#pragma warning disable 0169, 0649
    [Table(Name = "Coletores")]
    public class Coletor
    {
        [Column(IsPrimaryKey = true, IsDbGenerated = true)]
        public int Id { get; set; }

        [Column]
        public float Latitude { get; set; }

        [Column]
        public float Longitude { get; set; }

        [Column(Name = "Pessoa")]
        private int? pessoaId;

        private EntityRef<Pessoa> _pessoa = new EntityRef<Pessoa>();

        [Association(Name = "FK_Coletores_ColetorPessoa", IsForeignKey = true, Storage = "_pessoa", ThisKey = "pessoaId")]
        public Pessoa Pessoa
        {
            get { return _pessoa.Entity; }
            set { _pessoa.Entity = value; }
        }

        private EntitySet<Ocorrencia> _ocorrencias = new EntitySet<Ocorrencia>();

        [Association(Name = "FK_Ocorrencias_ColetorOcorrencias", Storage = "_ocorrencias", ThisKey = "Id", OtherKey = "coletorId")]
        public ICollection<Ocorrencia> Ocorrencias
        {
            get { return (from co in ColetorOcorrencias select co.Ocorrencia).ToList(); }
            set { _ocorrencias.Assign(value); }
        }

        private EntitySet<PessoaColetor> _pessoaColetores = new EntitySet<PessoaColetor>();

        [Association(Name = "FK_PessoaColetores_Coletores", Storage = "_pessoaColetores", OtherKey = "coletorId", ThisKey = "Id")]
        private ICollection<PessoaColetor> PessoaColetores
        {
            get { return _pessoaColetores; }
            set { _pessoaColetores.Assign(value); }
        }

        private EntitySet<ColetorOcorrencia> _coletorOcorrencias = new EntitySet<ColetorOcorrencia>();

        [Association(Name = "FK_ColetorOcorrencias_Coletores", Storage = "_coletorOcorrencias", OtherKey = "coletorId", ThisKey = "Id")]
        private ICollection<ColetorOcorrencia> ColetorOcorrencias
        {
            get { return _coletorOcorrencias; }
            set { _coletorOcorrencias.Assign(value); }
        }

        public ICollection<Pessoa> Pessoas
        {
            get { return (from pc in PessoaColetores select pc.Pessoa).ToList(); }
        }
    }
}

Answer 1

根据过去的经验，这里要冒险。 SqlServerCE 驱动程序有两种版本，x86 和 x64。通常，机器上只能安装一个，安装程序将在第二个上失败。但是，如果先安装 x86 驱动程序，然后再安装 x64，则可以在命令行上使用 /force 开关。

这可能对您的问题有帮助，也可能没有帮助，从提供的详细信息很难判断。

Answer 2

好的，我不知道为什么，但现在我的应用程序可以运行了。我认为这个错误是 Visual Studio 的一种错误，所以，为了解决我的问题，我刚刚重新启动了我的电脑。

System.Data.Linq.dll 中发生了 'System.Data.SqlServerCe.SqlCeException' 类型的未处理异常

An unhandled exception of type 'System.Data.SqlServerCe.SqlCeException' occurred in System.Data.Linq.dll

.net

c#

linq

windows-phone-7