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将Sql查询语句获取的数据插入到List列表里面

时间：2021-07-01 10:21:17 帮助过：128人阅读

我想查询一个用户表的信息，该用户有姓名，密码，信息三列 //1.定义一个用户类型的List数组，userInfo类的代码在下方 List<userInfo> userInfo = new List<userInfo>(); //2.我们要读取查询语句的数据，并且保存了。这里我们将使用IDataReader语句 //数据库类的实例，类的代码在下方 DB db = new DB(); //解析方法 using(IDataReader read=db.read("select * from userInfo")) { while (read.Read()) { userInfo a = new userInfo(); a.user_Name = read[0].ToString(); a.user_Passwd = read[1].ToString(); a.user_region = read[2].ToString(); userInfo.Add(a); } }

userInfo类的代码：

    <span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span><span style="color: #000000"> userInfo
    {      
        </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">string</span> user_Name{<span style="color: #0000ff">get</span>;<span style="color: #0000ff">set</span><span style="color: #000000">;}
        </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">string</span> user_Passwd {<span style="color: #0000ff">get</span>;<span style="color: #0000ff">set</span><span style="color: #000000">;}
        </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">string</span> user_region{<span style="color: #0000ff">get</span>;<span style="color: #0000ff">set</span><span style="color: #000000">;}
    }</span>

DB类的代码：

    <span style="color: #0000ff">public</span>  <span style="color: #0000ff">class</span><span style="color: #000000"> DB
    {
   
         </span><span style="color: #008000">//</span><span style="color: #008000">数据库操作
         </span><span style="color: #008000">//</span><span style="color: #008000">1.连接数据库</span>
         <span style="color: #0000ff">public</span><span style="color: #000000">  SqlConnection connect()
         {
        
             </span><span style="color: #0000ff">string</span> rode = <span style="color: #800000">@"</span><span style="color: #800000">Data Source=KTY;Integrated Security=SSPI;Initial Catalog=shuyunquan</span><span style="color: #800000">"</span><span style="color: #000000">;
             SqlConnection con </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> SqlConnection(rode);
             con.Open();
             </span><span style="color: #0000ff">return</span><span style="color: #000000"> con;
         }
          </span><span style="color: #008000">//</span><span style="color: #008000">执行语句的数据库方法</span>
         <span style="color: #0000ff">public</span>  SqlCommand command(<span style="color: #0000ff">string</span><span style="color: #000000"> sql)
         {
             SqlCommand cmd </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> SqlCommand(sql, connect());
             </span><span style="color: #0000ff">return</span><span style="color: #000000"> cmd;
         }
          </span><span style="color: #008000">//</span><span style="color: #008000">行数影响的方法</span>
         <span style="color: #0000ff">public</span>  <span style="color: #0000ff">int</span> Execute(<span style="color: #0000ff">string</span><span style="color: #000000"> sql)
         {
             </span><span style="color: #0000ff">return</span><span style="color: #000000"> command(sql).ExecuteNonQuery();
         }
          </span><span style="color: #008000">//</span><span style="color: #008000">返回查询结果的方法</span>
         <span style="color: #0000ff">public</span> SqlDataReader read(<span style="color: #0000ff">string</span><span style="color: #000000"> sql)
         {
             </span><span style="color: #0000ff">return</span><span style="color: #000000"> command(sql).ExecuteReader();
         }
    }</span>

将Sql查询语句获取的数据插入到List列表里面

标签：span 连接数据库并且 rod ade 使用方法结果定义

将Sql查询语句获取的数据插入到List列表里面

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