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过程或函数需要参数,但未提供

[英]Procedure or function expects parameter , which was not supplied

过程或函数“登录”需要未提供的参数“ @Abc”

经过4个小时的搜索和尝试,没有使用我已经提供了此参数(复制/粘贴),并且赋予过程的参数数量与过程和顺序相同。

@Abc是输出参数。

存储过程定义:

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER proc [dbo].[login]
(
    @Abc int output,
    @firstname varchar(255) output,
    @lastname varchar(255) output,
    @Email varchar(255),
    @pass varchar(255)
)
As 
begin 
if not exists (select Email from user_1 where  email=@email)
 select @Abc = 0
 else begin
if not exists (
    select Email from user_1 where email =@Email and password = @pass
    )
    select @Abc = 1
else
select @Abc = 2,@firstname = u.first_name ,@lastname=u.last_name from user_1 u where u.email =   @email 
end
end 

调用存储过程的代码:

 myCon.Open();

 TextBox username = UserName;
 TextBox password = Password;

 SqlCommand myCommand = new SqlCommand("login", myCon);

 SqlParameter count= myCommand.Parameters.Add("@Abc", SqlDbType.Int);
 count.Direction = ParameterDirection.Output;

 SqlParameter fnp = myCommand.Parameters.Add("@firstname", SqlDbType.VarChar,255);
 fnp.Direction = ParameterDirection.Output;

 SqlParameter lnp = myCommand.Parameters.Add("@lastname", SqlDbType.VarChar, 255);
 lnp.Direction = ParameterDirection.Output;

 myCommand.Parameters.AddWithValue("@Email",username.Text);
 myCommand.Parameters.AddWithValue("@pass", password.Text);

 myCommand.ExecuteNonQuery();
 myCon.Close();

您已省略:

myCommand.CommandType = CommandType.StoredProcedure;

因此,发送到数据库的命令是恶意的sp_executeSQL调用,而不是所需的exec login

仅供参考,语法也较短:

myCommand.Parameters.Add("@Abc", SqlDbType.Int).Direction = ParameterDirection.Output;

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