c# - 将多个查询的结果添加到集合并在 div 中显示集合

Question

我希望能够运行下面的查询并在 div 中逐行返回结果。结果被添加到一个哈希表中，我将把它传递给另一个方法并将其显示在一个 div 中。

数组 arrayOfQueries[0] 中的第一个查询可以返回多行 Que：

1. 我如何编写它来处理为该数组中的查询返回的多行 --- arrayOfQueries[0]。即我希望能够将多行存储在苛刻的表中，或者我应该使用 stringbuilder 对象。

2. 如何在 div 中显示哈希表的内容。

   public Hashtable DisplayResultsToUsers(int genJobId)
   {
       Hashtable myHt = new Hashtable();
       try
       {
           string[] arrayOfQueries = new string[4];
           arrayOfQueries[0] = "select generic, customernumber, productcode from u_generic_data where row_status = 2 and generic_job_id =" + genJobId;
           arrayOfQueries[1] = "select count(*) from u_generic_data where row_status = 2 and generic_job_id =" + genJobId;
           arrayOfQueries[2] = "select count(*) from u_generic_data where row_status = 1 and generic_job_id =" + genJobId;
           arrayOfQueries[3] = "select count(*) from u_generic_data where row_status = 0 and generic_job_id =" + genJobId;
   
           string connect = ConfigurationManager.ConnectionStrings["myconnect"].ConnectionString;
   
           using (OdbcConnection resConnect = new OdbcConnection(connect))
           {
               string sqlStmt = string.Empty;
               string queryResult = string.Empty;
               int count = 0;
               OdbcCommand dbCmd = new OdbcCommand();
               dbCmd.Connection = resConnect;
               resConnect.Open();
   
               foreach (string s in arrayOfQueries)
               {
                   dbCmd.CommandText = s;
                   queryResult =  Convert.ToString(dbCmd.ExecuteScalar());
                   count = count + 1;
                   myHt.Add(count, queryResult);
               }
   
               resConnect.Close();
           }
   
       }
       catch (Exception ex)
       {
   
   
       }
   
       return myHt;
   

Answer 1

dbCmd.ExecuteScalar()不适用于诸如select generic, customernumber, productcode from u_generic_data where row_status = 2 and generic_job_id =" + genJobId. 您需要做dbCmd.ExecuteReader()或其他一些重载来检索这些列。 ExecuteScalar()查询会很好select count(*)。