小编Ald*_*rez的帖子

我正在尝试在我的数据库中插入值,每当我尝试添加它时,我的程序就会崩溃,给我一个错误,即ConnectionString属性尚未初始化,但我正确初始化它.这是我的代码:

private static string conStr = @"Data Source=(LocalDB)\v11.0;AttachDbFilename=c:\users\aldrin\documents\visual studio 2013\Projects\MidtermAssignment_Ramirez\MidtermAssignment_Ramirez\MasterFile.mdf;Integrated Security=True";
    SqlConnection myCon = new SqlConnection();

    private int studId, year, units; 
    private string fName, lName, mName, course, payment;

    public void insertRecord()
    {
        myCon.Open();
        SqlCommand insertInfo = new SqlCommand("spInsertStudentInformation", myCon);
        insertInfo.CommandType = CommandType.StoredProcedure;
        insertInfo.Parameters.Add("@studId", SqlDbType.Int).Value = studId;
        insertInfo.Parameters.Add("@fName", SqlDbType.VarChar).Value = fName;
        insertInfo.Parameters.Add("@lName", SqlDbType.VarChar).Value = lName;
        insertInfo.Parameters.Add("@mName", SqlDbType.VarChar).Value = mName;
        insertInfo.ExecuteNonQuery();
        myCon.Close();
        myCon.Open();
        SqlCommand insertData = new SqlCommand("spInsertStudentData", myCon);
        insertData.CommandType = CommandType.StoredProcedure;
        insertData.Parameters.Add("@studId", SqlDbType.Int).Value = studId;
        insertData.Parameters.Add("@course", SqlDbType.VarChar).Value = course;
        insertData.Parameters.Add("@year", SqlDbType.Int).Value …

我创建了总共27个按钮,其中26个按钮单击了一个.在表单加载时看不到的另一个按钮只有在用户单击其中一个按钮后才能看到,然后单击的按钮将隐藏在表单中.这是我的方法:

private void frmGame_Load(object sender, EventArgs e)
    {
        btn1.Click += clickHandler;
        btn2.Click += clickHandler;
        btn3.Click += clickHandler;
        btn4.Click += clickHandler;
        btn5.Click += clickHandler;
        btn6.Click += clickHandler;
        btn7.Click += clickHandler;
        btn8.Click += clickHandler;
        btn9.Click += clickHandler;
        btn10.Click += clickHandler;
        btn11.Click += clickHandler;
        btn12.Click += clickHandler;
        btn13.Click += clickHandler;
        btn14.Click += clickHandler;
        btn15.Click += clickHandler;
        btn16.Click += clickHandler;
        btn17.Click += clickHandler;
        btn18.Click += clickHandler;
        btn19.Click += clickHandler;
        btn20.Click += clickHandler;
        btn21.Click += clickHandler;
        btn22.Click += clickHandler;
        btn23.Click += clickHandler;
        btn24.Click += clickHandler; …