基於查詢填充gridview

Question

我創建了一個C＃應用程序，我調用我的bindjob方法將查詢結果綁定到gridview。現在我正在爲asp工作，並且在StringBuilder上出現錯誤，表示無法找到名稱空間。我該如何解決這個問題，以便我可以使用我的查詢返回結果？

StringBuilder sqlString = new StringBuilder(); 
sqlString.Append("SELECT DISTINCT o.SALES_ORDER_NUMBER, d.Time "); 
sqlString.Append("FROM [LYNXHQ\\sqlexpress].FRESH_MSS.dbo.Order_Detail o "); 
sqlString.Append("FULL OUTER JOIN "); 
sqlString.Append("[COMMAND\\sqlexpress].******.dbo.Time d "); 
sqlString.Append("ON o.SALES_ORDER_NUMBER = d.SalesOrderNumber "); 
sqlString.Append("Order by o.SALES_ORDER_NUMBER"); 

C＃Bind方法，我立足它關閉的

StringBuilder sqlString = new StringBuilder(); 
sqlString.Append("SELECT e.FirstName + ' ' + e.LastName as Name, "); 
sqlString.Append("  jn.JobDescription, SUM(Round(l.TotalMinutes/60,0)) AS Time "); 
sqlString.Append(" FROM Logins l, JobNumber jn, Employee e"); 
sqlString.Append(" WHERE e.EmployeeID = @EmployeeID "); 
sqlString.Append(" AND jn.JobID = l.JobID "); 
sqlString.Append(" AND e.EmployeeID = l.EmployeeID "); 
sqlString.Append(" GROUP BY e.FirstName, e.LastName, jn.JobDescription "); 

DataTable dt = null; 

SqlConnection dbConn = new SqlConnection(ConfigurationManager.ConnectionStrings["WinhostConnection"].ConnectionString); 

    SqlParameter[] parameters = new SqlParameter[] { new SqlParameter("@EmployeeID", EmployeeID.Value), 
                 new SqlParameter("@startDate", startDate.Date), 
                 new SqlParameter("@endDate", endDate.Date) }; 

     try 
     { 
      dt = DBHelper.executeDataTable(dbConn, sqlString.ToString(), parameters); 
      if (dt != null) 
      { 
       GridView.DataSource = dt; 
      } 
      //hide "name" column 
      GridView.Columns[0].Visible = false; 

      dbConn.Close(); 
      dbConn.Dispose(); 
     } 
     catch (Exception ex) 
     { 
      throw ex; 
     } 
     finally 
     { 
      if (dbConn != null) 
      { 
       try { dbConn.Close(); dbConn.Dispose(); } 
       catch { } 
      } 
     } 

Answer 1

StringBuilder的類型是System.Text命名空間;加：

using System.Text; 

到您的源文件的頂部。

http://msdn.microsoft.com/en-us/library/system.text.stringbuilder(v=vs.110).aspx