如何在數組中存儲數據庫中的項目？

public partial class Piechart : System.Web.UI.Page 
{ 
    private decimal total = 0; // course total 
    private decimal registered = 0; 
    private decimal regAttend = 0; 
    private decimal nRegAttend = 0; 
    private int regPer = 0; 
    private int regToTotalPer = 0; 
    private int nRegPer = 0; 
    private int angle = 0; 
    private int angle2 = 0; 
    private int angle3 = 0; 
    private int parTotal = 0; 
    //const string G = "SELECT DISTINCT COUNT(Grouping) from Attendance"; 
    // SqlConnection c = new SqlConnection(@"Data Source=localhost\SQLEXPRESS;Initial Catalog=PSeminar;Integrated Security=true;Trusted_Connection=Yes;MultipleActiveResultSets=true"); 
    //SqlCommand Command = new SqlCommand(G); 


    private string[] Status = new string[2] { "Attend", "Didn't Attend" }; 
    private string[] Course = new string[] {//items from database};

我想使用一個sql語句來調用項目列表並存儲在上述數組中。我這樣做是因爲之前數組中的項目是硬編碼的。現在我想從數據庫中檢索它，因爲每當有新項目時，都會自動繪製一個新的餅圖。如何在數組中存儲數據庫中的項目？

來源

2011-09-21 Mark20

哪些** **項目要存儲到一個數組數據庫來做到這一點？ – adatapost

你的問題是什麼？ – Icarus

爲什麼將它存儲在一個數組中，只是將它存儲爲List <>並捕獲數據行 – CBRRacer

這裏的方式與ArrayList

ArrayList Course = new ArrayList(); 
const string query = "SELECT DISTINCT COUNT(Grouping) from Attendance"; 
const string connectionString = @"Data Source=localhost\SQLEXPRESS;Initial Catalog=PSeminar;Integrated Security=true;Trusted_Connection=Yes;MultipleActiveResultSets=true"; 
using (SqlConnection cn = new SqlConnection(connectionString)) 
{ 
    using (SqlCommand cm = new SqlCommand(query, cn)) 
    { 
     cn.Open(); 
     SqlDataReader reader = cm.ExecuteReader(); 
     while (reader.Read()) 
     { 
      Course.Add(reader.GetString(0)); 
     } 
    } 
} 

//Course.ToArray(); // <-- cast to string array object do use in the pie chart

來源

2011-09-21 03:33:02 MikeM

如何在數組中存儲數據庫中的項目？

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