Question

当我登录我的简单应用程序时。它会出现此错误。

概念方类型“Converter.Session”中成员'SessionId'的类型'Edm.Int32'与对象方成员'SessionId'的类型'System.Decimal'不匹配输入

在我的错误行代码

下面

List<User> users = context.Users.ToList<User>();

吹完我的完整代码

private void toolStripMenuItem1_Click(object sender, EventArgs e)
{
    InputBox("User Name", "Please enter User ID", ref UserName);

    QuestionId = 0;
    Boolean UserExsits = false;
    context = new ConversionGameDBContainer();
    List<User> users = context.Users.ToList<User>();// this is error line
    foreach (User i in users)
    {
        if (i.UserId.ToString().Trim().Equals(UserName.Trim()))
        {
            UserExsits = true;
            UserLogged = true;
            MessageBox.Show("Hello " + UserName + "!!! you are back, Enjoy the game");
            break;
        }
    }
    if (!UserExsits)
    {
        User u = new User();

        u.UserId = UserName;
        context.Users.Add(u);

        context.SaveChanges();
        MessageBox.Show("User Id " + UserName + " Created and enjoy the game");
        UserLogged = true;
    }

    ConvertorButton.Enabled = false;
    if (UserLogged)
    {
        DateTime d = DateTime.Now;
        session = new Session();
        session.StartTime = d;
        session.UserId = UserName;
        context.Sessions.Add(session);

        context.SaveChanges();
        context.Entry(session).GetDatabaseValues();

        SessionId = session.SessionId;
    }

    if (f == null)
    {
        f = new HistoryResult();
    }

    PlayConversionGame.UserName = UserName;
    f.Show();
    String Output = "";
    context = new ConversionGameDBContainer();
}

Answer 1

我知道这个问题有点陈旧，但在遇到同样的错误信息时我偶然发现了它。

删除bin和object文件夹，然后重新运行项目，为我解决了问题。

另见这个问题（编辑OP的一部分）： How to solve the following MappingException

概念方类型“Converter.Session”中成员'SessionId'的类型'Edm.Int32'与类型'System'不匹配

1 个答案: