Question

我使用C＃和sql在ASP.NET MVC 4中工作。

我有两张桌子：

CREATE TABLE [dbo].[Mem_Basic] (
   [Id]      INT           IDENTITY (1, 1) NOT NULL,
   [Mem_NA]  VARCHAR (100) NOT NULL,
   [Mem_Occ] VARCHAR (200) NOT NULL,
   PRIMARY KEY CLUSTERED ([Id] ASC)
);

和

CREATE TABLE [dbo].[Mem_Details] (
   [Id]          INT           IDENTITY (1, 1) NOT NULL,
   [Mem_Id]      INT           NOT NULL,
   [Mem_Role]    VARCHAR (250) NOT NULL,
   [Mem_Email]   VARCHAR (50)  NULL,
   [Mem_MPh]     VARCHAR (15)  NULL,
   [Mem_DOB]     DATE          NULL,
   [Mem_BGr]     NCHAR (10)    NULL,
   [Mem_WAnn]    DATE          NULL,
   [Mem_Spouse]  VARCHAR (75)  NULL,
   [Mem_Web]     VARCHAR (300) NULL,
   PRIMARY KEY CLUSTERED ([Id] ASC)
);

我想将数据插入第一个表，然后使用相同的创建按钮将Mem_Basic表中新插入的id作为Mem_Id插入Mem_Details表。

之后我想返回第一个表的Id。我使用以下c＃代码

 public int CreateNewMember(string Mem_NA, string Mem_Occ )
 {
       using (SqlConnection con=new SqlConnection(Config.ConnectionString))
       {
            using (SqlCommand cmd = new SqlCommand("INSERT INTO Mem_Basic(Mem_Na, Mem_Occ) output INSERTED.Id VALUES(@na, @occ)", con))
            {
                cmd.Parameters.AddWithValue("@na", Mem_NA);
                cmd.Parameters.AddWithValue("@occ", Mem_Occ);
                con.Open();

                int modified = (int)cmd.ExecuteScalar();

                using (SqlCommand cmd1 = new SqlCommand("INSERT INTO Mem_Details (Mem_Id, Mem_Role) VALUES (@id, @role)", con))
                {
                    cmd.Parameters.AddWithValue("@id", modified);
                    cmd.Parameters.AddWithValue("@role","Member");
                }

                if (con.State == System.Data.ConnectionState.Open) con.Close();
                return modified;
            }
        }
    }

这只会将数据插入第一个表并返回Id。

Answer 1

我会更改以下代码

using (var conn = new SqlConnection(connectionString))
using (var command = new SqlCommand("CreateNewMember", conn) { 
                           CommandType = CommandType.StoredProcedure }) {
   command.Parameters.AddWithValue("@na", Mem_NA);
   command.Parameters.AddWithValue("@occ", Mem_Occ);
   command.Parameters.AddWithValue("@role","Member");
   conn.Open();
   modified = (int)command.ExecuteScalar();
   conn.Close();
}

使用存储过程

create proc CreateNewMember
(
     @na nvarchar(100), 
     @occ nvarchar(100),
     @role nvarchar(250)
)
as
begin

declare @ID int

      INSERT INTO Mem_Basic(Mem_Na,Mem_Occ) output INSERTED.Id VALUES(@na,@occ)

      select @ID = Scope_Identity()

      INSERT INTO Mem_Details (Mem_Id,Mem_Role) VALUES (@ID,@role)

      SELECT @ID
end

Answer 2

试试这个。

 public int CreateNewMember(string Mem_NA, string Mem_Occ )
        {
            using (SqlConnection con=new SqlConnection(Config.ConnectionString))
            {
                using (SqlCommand cmd = new SqlCommand("INSERT INTO Mem_Basic(Mem_Na,Mem_Occ) output INSERTED.Id VALUES(@na,@occ)", con))
                {
                    cmd.Parameters.AddWithValue("@na", Mem_NA);
                    cmd.Parameters.AddWithValue("@occ", Mem_Occ);
                    con.Open();
                    int modified = (int)cmd.ExecuteScalar();
                    using (SqlCommand cmd1 = new SqlCommand("INSERT INTO Mem_Details (Mem_Id,Mem_Role) VALUES (@id,@role)", con))
                    {
                        cmd1.Parameters.AddWithValue("@id", modified);
                        cmd1.Parameters.AddWithValue("@role","Member");
                        cmd1.ExecuteNonQuery();
                    }
                    if (con.State == System.Data.ConnectionState.Open) con.Close();
                    return modified;
                }
            }
        }

Answer 3

您需要在第二个使用块中将cmd更改为cmd1，然后调用exert标量

public int CreateNewMember(string Mem_NA, string Mem_Occ )
    {
        using (SqlConnection con=new SqlConnection(Config.ConnectionString))
        {
            using (SqlCommand cmd = new SqlCommand("INSERT INTO Mem_Basic(Mem_Na,Mem_Occ) output INSERTED.Id VALUES(@na,@occ) SELECT SCOPE_IDENTITY()", con))
            {
                cmd.Parameters.AddWithValue("@na", Mem_NA);
                cmd.Parameters.AddWithValue("@occ", Mem_Occ);
                con.Open();
                int modified = (int)cmd.ExecuteScalar();
                using (SqlCommand cmd1 = new SqlCommand("INSERT INTO Mem_Details (Mem_Id,Mem_Role) VALUES (@id,@role) ", con))
                {

                    cmd1.Parameters.AddWithValue("@id", modified);// change here
                    cmd1.Parameters.AddWithValue("@role","Member");// change here
                    cmd1.ExecuteNonQuery(); //added this
                }
                if (con.State == System.Data.ConnectionState.Open) con.Close();
                return modified;
            }
        }
    }

将数据依次插入两个表中

3 个答案: