从表中选择一个值以插入新表格加上其他值

Question

我有这个存储过程不会返回@RefereeId与getRefereeId输出参数。有什么建议么？运行此查询

当我什么也得不到返回 getRefereeId

@Email nvarchar(50), 
    @AssignerId int, 
    @RefereeId Int Output, 
    @DateCreated Datetime, 
    @Active bit, 
    @Invitation bit 
as 
begin 
    Select @RefereeId 
    From Referee 
    Where Email = @Email 

    Insert Into Assignment (AssignerId, RefereeId, DateCreated, Active, Invitation) 
    Values (@AssignerId, @RefereeId, @DateCreated, @Active, @Invitation) 
End 

VB代码：

Dim strConn As String = "Data Source=mydatasource" 
Dim Conn As New SqlConnection(strConn) 

Dim Cmd As New SqlCommand("InviteReferee", Conn) 
Cmd.CommandType = CommandType.StoredProcedure 

Cmd.Parameters.Add(New SqlParameter("Email", newEmail.Text))   
Cmd.Parameters.Add(New SqlParameter("Invitation", "True")) 
Cmd.Parameters.Add(New SqlParameter("Active", "False")) 
Cmd.Parameters.Add(New SqlParameter("AssignerId", AssignerId.Text)) 
Cmd.Parameters.Add(New SqlParameter("DateCreated", DateTime.Now()))   

Dim getRefereeId As SqlParameter = Cmd.Parameters.Add("@RefereeId", SqlDbType.Int) 
getRefereeId.Direction = ParameterDirection.Output 

Conn.Open() 
Cmd.ExecuteNonQuery() 

Answer 1

你需要实际的列值分配给你的输出参数！

你的代码改成这样：

Select @RefereeId = SomeSuitableColumnNameHere 
From dbo.Referee 
Where Email = @Email 

这样的话，你会选择在Referee你列一个成然后被发送回VB.NET调用者@RefereeId参数。