链接到SQL Server Express的C#输出错误

下面是我按下按钮后得到的输出，尽管我的SQL Server数据库中确实存在

EmployeeNumber

和

DOB

我尝试了很多次，但都无法找出导致输出错误的问题

谢谢你的帮助

C#代码：

SQL Server存储过程代码：

CREATE PROCEDURE spEmployeeC
    @Employee INT,
    @DOB DATE
AS
BEGIN
    SET NOCOUNT ON; 

    DECLARE @Employee_check INT;
    DECLARE @Password_check DATE;

    SELECT * 
    FROM Employee_Table 
    WHERE [EMPLOYEE_NUM] = @Employee AND [DOB] = @DOB
END

---

这样做会更好：

    protected void btn_Click(object sender, EventArgs e)
    {
        if (string.IsNullOrEmpty(txtEmployee.Text))
        {
            MessageBox.Show("You must supply an Employee Number");
            return;
        }

        if (string.IsNullOrEmpty(txtPassword.Text))
        {
            MessageBox.Show("You must supply a Password");
            return;
        }

        if (IsAuthenticated())
        {
            MessageBox.Show("Welcome " + txtEmployee.Text);
        }
        else
        {
            MessageBox.Show("The Username or Password you entered is incorrect. Please try again");
        };
    }

    private bool IsAuthenticated()
    {
        using (var conn = new SqlConnection(ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString))
        {
            SqlCommand cmd = new SqlCommand("spValidateCredentials", conn);
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.Add("@Employee", SqlDbType.Int).Value = txtEmployee.Text;
            cmd.Parameters.Add("@DOB", SqlDbType.Date).Value = DateTime.Parse(txtPassword.Text);
            conn.Open();
            return ((int)cmd.ExecuteScalar() > 0);
        }
    }

还可以更改存储过程以返回记录计数：

CREATE PROCEDURE [dbo].[spValidateCredentials]
    @Employee INT,
    @DOB DATE
AS 
BEGIN 
    SELECT COUNT(*) 
      FROM Employee_Table 
     WHERE EMPLOYEE_NUM=@Employee 
       AND DOB=@DOB
END

---

第一：第二：您不会对存储过程执行的结果做任何事情。您只需检查用户名文本框是否包含文本“@Employee”@DavidG Hi David！感谢您的分享，有没有更好的方法来改进我的代码？：）我不想听起来很难听，但这是非常基本的C。我建议您在这里提出更多问题之前先浏览一些教程。@DavidG我明白了，很抱歉打扰了tho。我今天刚开始写我的C代码。好的，谢谢，顺便说一句：）

CREATE PROCEDURE [dbo].[spValidateCredentials]
    @Employee INT,
    @DOB DATE
AS 
BEGIN 
    SELECT COUNT(*) 
      FROM Employee_Table 
     WHERE EMPLOYEE_NUM=@Employee 
       AND DOB=@DOB
END