存储过程在 SQL Management Studio 中运行，但不在代码中

Question

我正在输入和更新两个表中的数据，在 SQl 服务器中使用 SP 工作创建查询是可以的，但是在 C# 中查询一个表单会产生错误。

这是我的表定义：

CREATE TABLE [dbo].[nationality](
    [nationalitycode] [int] IDENTITY(1,1) NOT NULL,
    [nationality] [nvarchar](50) NULL,
        CONSTRAINT [PK_nationality] PRIMARY KEY CLUSTERED 
(
    [nationalitycode] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
/****** Object:  Table [dbo].[user]   
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

-------------------------------------------------------------------------------------------
CREATE TABLE [dbo].[user](
    [code] [int] IDENTITY(1,1) NOT NULL,
    [name] [nvarchar](50) NULL,
    [lastname] [nvarchar](50) NULL,
    [nationalitycode] [int] NULL,
        CONSTRAINT [PK_user] PRIMARY KEY CLUSTERED 
(
    [code] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO

当我运行以下代码来编辑我得到的数据时：

Sqlexception 未处理 过程或函数 'sp_update' 期望 未提供参数“@lastName”。

private void btnRec_Click(object sender, EventArgs e)
{
   SqlCommand cmd = new SqlCommand("", cn);
   cmd.CommandType = CommandType.StoredProcedure;
   cn.Open();
   int fila = 0;
   switch (menup)
   {
      case menu.New:
         cmd.CommandText = "sp_insertdata";
         cmd.Parameters.AddWithValue("code", 0);
         cmd.Parameters.AddWithValue("name", txtName.Text);
         cmd.Parameters.AddWithValue("lastName", txtlastName.Text);
         cmd.Parameters.AddWithValue("nationality", txtNationality.Text);
         cmd.Parameters["code"].Direction = ParameterDirection.Output;
         fila = cmd.ExecuteNonQuery();
         if (fila!=0)
         {
             MessageBox.Show("Good Registry" +      cmd.Parameters["code"].Value.ToString());
         }
         break;

这是我的编辑代码：

case menu.Edit:
   cmd.CommandText = "sp_update";
    cmd.Parameters.AddWithValue("code", txtCode.Text);
    cmd.Parameters.AddWithValue("name", txtName.Text);
    cmd.Parameters.AddWithValue("lastname", txtLastName.Text);
    cmd.Parameters.AddWithValue("nationality", txtNationality.Text);
    fila = cmd.ExecuteNonQuery();
    if (fila!=0)
    {
       MessageBox.Show("Update ok" +  cmd.Parameters["code"].Value.ToString());
    }
    break;

当我运行编辑代码时，我得到：

Sqlexception 未处理 过程或函数 'sp_update' 期望 未提供参数“@lastName”。

这里是存储过程定义：

ALTER proc [dbo].[sp_insertdata]
@name nvarchar(50),
@lastname nvarchar(50),
@nationality nvarchar(50)
as
if  not exists(select * from nationality where nationality=@nationality)
begin
insert into nationality(nationality)values(@nationality)
end
declare @id int
select @id=nationalitycode from nationality where nationality=@nationality

insert into usuario(name,lastname,nationalitycode) values (@name,@lastname,@id)

/************ *************** *************** ********/

ALTER proc [dbo].[sp_update]
@code int,
@name varchar(50),
@lastname varchar(50),
@nationality varchar(50)
as

if not exists (select * from nationality where nationality=@nationality)
begin
insert  into nationality(nationality)values(@nationality)
end

update user
SET  name= @name,lastname=@lastname,nationalitycode=(select nationalitycode from nationality where nationality=@nationality)
where code = @code

Answer 1

您的插入存储过程和插入代码存在问题。存储过程没有代码参数，但您将其作为输入传递。您的代码应为：

case menu.New:
    cmd.CommandText = "sp_insertdata";
    cmd.Parameters.AddWithValue("@name", txtName.Text);
    cmd.Parameters.AddWithValue("@lastName", txtlastName.Text);
    cmd.Parameters.AddWithValue("@nationality", txtNationality.Text);
    cmd.Parameters["code"].Direction = ParameterDirection.Output;
    fila = cmd.ExecuteNonQuery();

插入存储过程应包含代码作为输出：

ALTER proc [dbo].[sp_insertdata]
   @name nvarchar(50),
   @lastname nvarchar(50),
   @nationality nvarchar(50),
   @code int output
as
   if  not exists(select * from nationality where nationality=@nationality)
   begin
    insert into nationality(nationality)values(@nationality)
   end
   declare @id int
   select @id=nationalitycode from nationality where nationality=@nationality

   insert into usuario(name,lastname,nationalitycode) values (@name,@lastname,@id)

   SET @code=SCOPE_IDENTITY()

对于您的更新代码，我将更改为：

cmd.CommandText = "sp_update";
cmd.Parameters.AddWithValue("@code", txtCode.Text);
cmd.Parameters.AddWithValue("@name", txtName.Text);
cmd.Parameters.AddWithValue("@lastname", txtLastName.Text);
cmd.Parameters.AddWithValue("@nationality", txtNationality.Text);