C#SQL存储过程(插入) - 传递参数和检索参数

Question

我的服务器上有一个存储过程,它插入一些参数并返回插入的参数ID.我正在写一个表单来轻松完成这个,但我似乎无法获得传回的参数.

为了节省你做一大堆可能毫无意义的阅读,最好只关注我的C#代码,让我知道我需要做什么才能传递参数并得到一个回报.

C#Default.aspx

connection = new SqlConnection(ConfigurationManager.AppSettings["ConnectionInfo"]);
sql = "aStoredProc";

command = new SqlCommand(sql, connection);
command.CommandType = CommandType.StoredProcedure;

command.Parameter.Add(new SqlParameter("@FirstName", SqlDbType.VarChar)).Value = sFirstname;
command.Parameter.Add(new SqlParameter("@SurName", SqlDbType.VarChar)).Value = sSurname;

connection.Open(); 
int ID = command.ExecuteNonQuery();
connection.Close();

SQL aStoredProc

IF EXISTS(SELECT * FROM aTable WHERE ID = @ID)
  -- User exists, update details
  BEGIN
    BEGIN TRAN
      UPDATE aTable
        SET 
          FirstName = @FirstName,
          SurName = @SurName,
          LastUpdate = GetDate()
        WHERE ID = @ID

        IF (@@Error != 0)
          ROLLBACK TRAN
        ELSE
          COMMIT TRAN
        END
ELSE
  -- New user
  BEGIN
    BEGIN TRAN
      INSERT aTable (
        FirstName,
        SurName,
        GetDate()
      )
        VALUES (
          @FirstName, 
          @SurName,
          @LastUpdate
      ) 

      SELECT @ID = @@IDENTITY

      IF (@@Error != 0)
        ROLLBACK TRAN
      ELSE
        COMMIT TRAN
      END

该参数@ID在存储过程中列为:

@ID (int, Input/Output, No default)

和proc有'返回整数'.在SQL Server 2005升级之前,这曾经适用于VBA解决方案.

提前致谢.

Answer 1

connection = new SqlConnection(ConfigurationManager.AppSettings["ConnectionInfo"]); 
sql = "aStoredProc"; 
command = new SqlCommand(sql, connection); 
command.CommandType = CommandType.StoredProcedure; 
command.Parameter.Add(new SqlParameter("@FirstName", SqlDbType.VarChar)).Value = sFirstname; 
command.Parameter.Add(new SqlParameter("@SurName", SqlDbType.VarChar)).Value = sSurname; 
command.Parameter.Add(new SqlParameter("@SurName", SqlDbType.VarChar)).Value = sSurname; 
SqlParameter ParamId = cmd.Parameters.Add( "@Id", SqlDbType.Int);
ParamId.Direction = ParameterDirection.InputOutput;
command.Parameter.Add(ParamId);
connection.Open();  
command.ExecuteNonQuery(); 
int ID = ParamId.Value;
connection.Close();

1. 你必须在参数集合中添加输出参数.
2. 读取值如上所述.