存储过程

  存储过程的写法 以及 在C#中调用存储过程。

写法：

        CREATE PROCEDURE dbo.StoredProcedure4
 /*
 (
 @parameter1 int = 5,
 @parameter2 datatype OUTPUT
 )
 */
AS
 /* SET NOCOUNT ON */       -------sql语句
 RETURN

 

 C#中的调用方法：

            SqlCommand borrowbook = new SqlCommand();
            borrowbook.Connection = this.sqlConnection1;
            borrowbook.CommandType = CommandType.StoredProcedure;
            borrowbook.CommandText = "dbo.StoredProcedureBorrowedNumber";
            SqlParameter parinput = borrowbook.Parameters.Add("@ReaderID", SqlDbType.Char);
            parinput.Direction = ParameterDirection.Input;
            parinput.Value = ReaderID;
            SqlParameter paroutput = borrowbook.Parameters.Add("@BorrowedNumber", SqlDbType.Int);
            paroutput.Direction = ParameterDirection.Output;

            try
            {
                this.sqlConnection1.Open();
                borrowbook.ExecuteNonQuery();
                return Convert.ToInt16(paroutput.Value);
            }
            catch (System.Exception ex)
            {
                MessageBox.Show(ex.ToString());
                return 3;
            }
            finally { this.sqlConnection1.Close(); }
        }