Question

我正在尝试更新记录，但显示“违反主键约束，无法在对象/表中插入重复的键”。这个错误听起来像是在我更新记录时调用了“ ADD EMPLOYEE块”。

如果我放弃主键，它将插入另一条记录（已更新）而不是更新前一条！注意：已经阅读了许多问题可以解决它！

static public void UpdateEmployee(Employee employee)
{
    String conString = ConfigurationManager.ConnectionStrings["EMPLOYES"].ConnectionString;

    SqlConnection conn = new SqlConnection(conString);
    using (conn)
    {
        SqlCommand cmd = new SqlCommand("UpdateEmployeeRecord", conn);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.Add("@EmployeeID", SqlDbType.NVarChar, 8).Value = employee.EmployeeID;
        cmd.Parameters.Add("@FirstName", SqlDbType.NVarChar, 50).Value = employee.FirstName;
        cmd.Parameters.Add("@LastNmae", SqlDbType.NVarChar, 50).Value =     employee.LastName;
        cmd.Parameters.Add("@Email", SqlDbType.NVarChar, 50).Value = employee.Email;
        cmd.Parameters.Add("@Telephone", SqlDbType.NVarChar, 50).Value = employee.Telephone;

        conn.Open();
        cmd.ExecuteNonQuery();
    }
}

static public void AddEmployee(Employee employee)
{
    String conString = ConfigurationManager.ConnectionStrings["EMPLOYES"].ConnectionString;

    SqlConnection conn = new SqlConnection(conString);
    using (conn)
    {
        SqlCommand cmd = new SqlCommand("AddNewEmployee", conn);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.Add("@EmployeeID", SqlDbType.NVarChar, 8).Value = employee.EmployeeID;
        cmd.Parameters.Add("@FirstName", SqlDbType.NVarChar, 50).Value = employee.FirstName;
        cmd.Parameters.Add("@LastNmae", SqlDbType.NVarChar, 50).Value = employee.LastName;
        cmd.Parameters.Add("@Email", SqlDbType.NVarChar, 50).Value = employee.Email;
        cmd.Parameters.Add("@Telephone", SqlDbType.NVarChar, 50).Value = employee.Telephone;

        conn.Open();
        cmd.ExecuteNonQuery(); //(X) Exception is here
        }
    }

使用的程序

ALTER PROCEDURE [dbo].[UpdateEmployeeRecord]
(
    @EmployeeID NVARCHAR(8),@FirstName  NVARCHAR(50),
@LastNmae NVARCHAR(50),@Email NVARCHAR(50),
@Telephone Nvarchar(50)
)
AS
BEGIN
    UPDATE [DBO].[EMPLOYEE] SET  FirstName = @FirstName,
            LastName = @LastNmae, Email = @Email, Telephone = @Telephone
        WHERE EmployeeID = @EmployeeID 
    END

我希望记录会被更新，但这违反了主键约束。

Answer 1

在过程@LastNmae中使用的错误是@LastName，但没有影响

违反主键约束'PK_EMPLOYEE'。无法在对象

1 个答案: