Export amazon settlement report fix

src/bnhtrade.Core/Data/Database/Programmability/Sequence.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+using System.Data.SqlClient;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace bnhtrade.Core.Data.Database.Programmability
+{
+    public class Sequence : Connection
+    {
+        public Sequence (string sqlConnectionString) : base(sqlConnectionString)
+        {
+
+        }
+        public int GetNext(string sequenceName)
+        {
+            if (string.IsNullOrWhiteSpace(sequenceName))
+            {
+                throw new Exception("Sequence name is null or whitespace.");
+            }
+
+            using (SqlConnection conn = new SqlConnection(sqlConnectionString))
+            {
+                conn.Open();
+
+                using (SqlCommand cmd = new SqlCommand(@"
+                    SELECT NEXT VALUE FOR " + sequenceName 
+                    , conn))
+                {
+                    //cmd.Parameters.AddWithValue("@sequenceName", sequenceName);
+                    // it wouldn't let me use parameters
+
+                    object obj = cmd.ExecuteScalar();
+
+                    try
+                    {
+                        //string whaaaat =  (string)obj;
+                        return Convert.ToInt32(obj);
+                    }
+                    catch (Exception ex)
+                    {
+                        throw new Exception("Error returning next value in sequence: " + ex.Message);
+                    }
+                }
+            }
+        }
+    }
+}