将伪代码转换为C＃程序

Question

我正在尝试执行此任务。

我在我的数据库中有这张表。

items_table 
------------------ 
Item_Name | Item ID 
A  | 1 
B  | 1 
C  | 2 
D  | 2 
E  | Null 
F  | 
G  | 1 
H  | 
I  | Null 

Select * from items_table where Item_ID is Null or Item_ID is empty 

Loop(while there are items without Item_ID) 

Check the count of first Item_ID 

if first Item_ID count is less than 8 
(update items_table values (current Item_ID) where Item_Name is current row Item_Name) 

otherwise check next Item_ID 

If no Item_ID count is less than 8, insert max((Item_ID)+1) where Item_Name is current row Item_Name 

对于上表，这段代码应该做这样的事情。

E，F，H，I已经GROUP_ID null或空

现在我要插入的Item_ID所有这些项目。

首先检查表中所有现有Item_ID的计数。如果任何item_ID与少于8个项目一起使用，那么插入当前Item的Item_ID。如果没有Item_ID的计数小于8，则创建一个新的Item_ID应该是最大的Item_ID + 1.

我想写这个，但无法弄清楚如何循环行和计数ID比插入现有一个或新的。

private static void FIllGroupID(string connectionString) 
     { 
      string queryStringNoGroupID = 
       "Use Items select * from table_items_shelves where Item_ID is Null or Item_ID = '';"; 
      SqlCommand GetAllWithoutID = new SqlCommand(queryStringNoGroupID); 


      DataTable DataTableAllWithoutID = new DataTable(); 

      SqlDataAdapter adapterAllWithoutID = new SqlDataAdapter(GetAllWithoutID); 

      adapterAllWithoutID.Fill(DataTableAllWithoutID); 

      foreach (DataRow row in DataTableAllWithoutID.Rows) 
      { 

      } 

     } 

如何循环现有的item_ids并对它们进行计数。如果count小于8，则会在当前行中插入相同的ID或者创建max（item_id）+1并插入该ID。

Answer 1

现在谁会删除问题的反对票？

const string str = @“Data Source = localhost; Initial Catalog = Items; Integrated Security = True”; static void Main（string [] args） const string string connectionString = str;

  DataTable DataTableAllWithoutID = new DataTable(); 
#if !test 
      string queryString = "select * from table_items_shelves;"; 
      SqlDataAdapter adapterAllWithoutID = new SqlDataAdapter(queryString, connectionString); 
      adapterAllWithoutID.Fill(DataTableAllWithoutID); 
      adapterAllWithoutID.Dispose(); 
      SqlConnection connection = new SqlConnection(connectionString); 
      connection.Open(); 
      string insertString = "Update table_items_shelves Set Item_ID = @Item_ID where Item_Name = '@key';"; 
      SqlCommand insertCommand = new SqlCommand(insertString, connection); 
      insertCommand.Parameters.Add("@Item_ID", SqlDbType.Int); 
      insertCommand.Parameters.Add("@key", SqlDbType.NVarChar); 
#else 
      DataTableAllWithoutID.Columns.Add("Item_Name", typeof(string)); 
      DataTableAllWithoutID.Columns.Add("Item_ID", typeof(object)); 
      foreach (List<object> row in input) 
      { 
       DataRow newRow = DataTableAllWithoutID.Rows.Add(); 
       newRow.ItemArray = row.ToArray(); 
      } 

#endif 
      //this code will get empty items 
      List<DataRow> nullOrEmpty = DataTableAllWithoutID.AsEnumerable() 
       .Where(x => x.Field<object>("Item_ID") == null) 
       .ToList(); 
      //this creates a dictionary of valid items 
      Dictionary<int, List<DataRow>> dict = DataTableAllWithoutID.AsEnumerable() 
       .Where(x => x.Field<object>("Item_ID") != null) 
       .GroupBy(x => x.Field<object>("Item_ID"), x => x) 
       .ToDictionary(x => Convert.ToInt32(x.Key), x => (List<DataRow>)x.ToList()); 
      //create IEnumerator for the null items 
      IEnumerator<DataRow> emptyRows = nullOrEmpty.GetEnumerator(); 
      Boolean noMoreEmptyRows = false; 
      if (emptyRows != null) 
      { 
       foreach (int key in dict.Keys) 
       { 
        Console.WriteLine(key.ToString()); 
        //get count of items    
        int count = dict[key].Count; 
        int itemID = (int)key; 
        for (int index = count; count < 8; count++) 
        { 
         if (emptyRows.MoveNext()) 
         { 
          //get an item from the null list     
          emptyRows.Current["Item_ID"] = itemID; 
          insertCommand.Parameters["@Item_ID"].Value = itemID; 
          insertCommand.Parameters["@key"].Value = emptyRows.Current["Item_Name"]; 
          insertCommand.ExecuteNonQuery(); 
          Console.WriteLine("current item ID " + itemID); 
          Console.WriteLine("current count " + count); 
          //Console.ReadKey(); 
         }//end if 
         else 
         { 
          noMoreEmptyRows = true; 
          break; 
         }//end else 
        }//end for 
        if (noMoreEmptyRows) 
         break; 
       }//end foreach 
       if (!noMoreEmptyRows) 
       { 
        //increment key to one greater than max value 
        int maxKey = dict.Keys.Max() + 1; 
        int count = 0; 
        while (emptyRows.MoveNext()) 
        { 
         //get an item from the null list     
         emptyRows.Current["Item_ID"] = maxKey.ToString(); 
         insertCommand.Parameters["@Item_ID"].Value = maxKey.ToString(); 
         insertCommand.Parameters["@key"].Value = emptyRows.Current["Item_ID"]; 

          insertCommand.ExecuteNonQuery(); 

          count++; 
         if (count == 8) 
         { 
          maxKey++; 
          count = 0; 
         } 
        } 
       } 
      }//end if 
#if test 
      foreach (DataRow row in DataTableAllWithoutID.Rows) 
      { 
       Console.WriteLine("Item_Name : {0} Item ID : {1}", 
        row["Item_Name"], row["Item_ID"]); 
      } 
#endif 

      FIllGroupID(str); 
      Console.ReadKey(); 

     }