Question

我有一个方法，它从视图中获取检查值（可以有2个或更多，值名称为courseName）并将其存储在名为＆＃34; SelectedCourses＆＃34;的集合中。在这种情况下的问题是，我不知道是否应该将courseName值存储在RegisterTeacher表中，其中我存储所有其他值，或者存储在名为Course的单独表中。这些是2个表：

CREATE TABLE [dbo].[Courses] (
[courseName] NVARCHAR (MAX) NOT NULL,
[SNTeacher]  INT            NOT NULL,
[education]  NVARCHAR (50)  NOT NULL,
[ClassID]    NVARCHAR (50)  NULL,
[courseID]   INT            NOT NULL,
PRIMARY KEY CLUSTERED ([courseID] ASC),
CONSTRAINT [FK_Courses_ToTable] FOREIGN KEY ([SNTeacher]) REFERENCES [dbo].[RegisterTeacher] ([SNTeacher])

）;

这是表RegisterTeacher：

 CREATE TABLE [dbo].[RegisterTeacher] (
[SNTeacher]  INT            NOT NULL,
[UserName]   NVARCHAR (10)  NOT NULL,
[pwd]        INT            NOT NULL,
[fullName]   NVARCHAR (MAX) NOT NULL,
[CourseName] NVARCHAR (MAX) NOT NULL,
[courseID]   INT            NULL,
[education]  NVARCHAR (50)  NULL,
PRIMARY KEY CLUSTERED ([SNTeacher] ASC),
CONSTRAINT [FK_RegisterTeacher_ToTable] FOREIGN KEY ([courseID]) REFERENCES [dbo].[Courses] ([courseID])

）;

我的问题是如何从SelectedCourses集合中存储课程，如果我需要将它们存储在一个单独的表中，在这种情况下连接语法是否会起作用？任何帮助或建议都将受到赞赏。这是将值存储到db：

的方法

   public void SaveTeacher(object param)
    {
   string connectionString = null;
        string sql = null;
        connectionString = "Data Source=(LocalDB)\\MSSQLLocalDB;AttachDbFilename=C:\\Users\\User\\Desktop\\BackupVersion\\LastAndFinalVersion\\DatabaseStudents.mdf;Integrated Security=True";
        using (SqlConnection con = new SqlConnection(connectionString))
        {
            sql = "Insert into RegisterTeacher(SNTeacher,UserName,pwd,fullName,CourseName,education)values(@SNTeacher,@_UserName,@pwd,@fullName,@courseName,@education)";
            con.Open();
            using (SqlCommand cmd = new SqlCommand(sql, con))
            {
                cmd.Parameters.AddWithValue("@SNTeacher", SNTeacher);
                cmd.Parameters.AddWithValue("@UserName", _UserName);
                cmd.Parameters.AddWithValue("@pwd", pwd);
                cmd.Parameters.AddWithValue("@fullName", fullName);
                SelectedCourses = new ObservableCollection<Cours>();
                foreach (var item in Courses)
                {

                    if (item.IsChecked)
                    {
                        SelectedCourses.Add(item);

                    }
                    cmd.Parameters.AddWithValue("@CourseName", courseName);
                    cmd.Parameters.AddWithValue("@education", education);
                    cmd.ExecuteNonQuery();
                    MessageBox.Show("Registration succesfull! ");
                }
            }
        }
    }

如何将方法中的值存储到数据库中？

0 个答案: