绑定HashTable到RadioButtonList

针对列表控件中每一项都有key和value,可以使用HashTable来完成数据的绑定
关键代码如下:
using  System;
using  System.Data;
using  System.Configuration;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;
using  System.Collections;
using  System.Data.SqlClient;

public  partial  class  _Default : System.Web.UI.Page 
{
    
protected void Page_Load(object sender, EventArgs e)
    
{
        InitData();
    }


    
private Hashtable GetHashTable()
    
{
        SqlConnection conn 
= new SqlConnection();

        conn.ConnectionString 
= "server=.;database=northwind;uid=sa;pwd=sa";

        conn.Open();

        SqlCommand cmd 
= new SqlCommand("select CategoryID,CategoryName from Categories",conn);

        SqlDataAdapter sda 
= new SqlDataAdapter();

        sda.SelectCommand 
= cmd;

        SqlDataReader dr 
= cmd.ExecuteReader();

        Hashtable ht 
= new Hashtable();
        .
        
while (dr.Read())
        
{
            
string strKey = dr.GetSqlValue(0).ToString();

            
string strValue = dr.GetSqlValue(1).ToString();

            
if (strValue.StartsWith("C"))

                
continue;

            ht.Add(strKey,strValue);
        }


        conn.Close();

        
return ht;
    }


    
private void InitData()
    
{
        Hashtable ht 
= this.GetHashTable();

        
foreach (DictionaryEntry de in ht)
        
{
            ListItem item 
= new ListItem(de.Value.ToString(),de.Key.ToString());

            RadioButtonList1.Items.Add(item);
        }

    }

}

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