winform中登陆界面代码整了3个小时还不会啊。帮忙看看谢谢了
public partial class login : Form
     {
                static DataSet ds;
         public login()
         {
             InitializeComponent();              
         }
         private void button1_Click(object sender, EventArgs e)
         {              
            // if(ds.Tables[0].Rows[0][0].ToString()=="1231")
            // textBox1.Text = "4565697897415646";
             string str1 = textBox1.Text.ToString();
             string str2 = textBox2.Text.ToString();
             for(int i=0;i<ds.Tables["temp"].Rows.Count;i++)
                 if ((str1 == ds.Tables["temp"].Rows[i][0].ToString()) && (str2 == ds.Tables["temp"].Rows[i][1].ToString()))
                 {
                            //操作
                                         break;
                 }            
         }
         private void bindingSource1_CurrentChanged(object sender, EventArgs e)
         {
         }
         private void login_Load(object sender, EventArgs e)
         {
             ds = new DataSet();
                        SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["毕设.Properties.Settings.bisheConnectionString"].ConnectionString);
             conn.Open();
             SqlDataAdapter sql = new SqlDataAdapter("select * from login", conn);
             sql.Fill(ds, "temp");                              
         }
------解决方案--------------------登录不就是验证用户名和密码。
------解决方案--------------------public partial class login : Form
 {
 static DataSet ds;
 public login()
 {
 InitializeComponent();  
 }
 private void button1_Click(object sender, EventArgs e)
 {  
 // if(ds.Tables[0].Rows[0][0].ToString()=="1231")
 // textBox1.Text = "4565697897415646";
 string str1 = textBox1.Text.ToString();
 string str2 = textBox2.Text.ToString();
 ds = new DataSet();
 SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["毕设.Properties.Settings.bisheConnectionString"].ConnectionString);
  string cmd=“select * from login where uid='+str1+' and pwd='+str2+'  ”
 conn.Open();
 SqlDataAdapter sql = new SqlDataAdapter(cmd ,conn);
 sql.Fill(ds, "temp");
 // for(int i=0;i<ds.Tables["temp"].Rows.Count;i++)
 if (ds.Tables["temp"].Rows.Count>0)  {
 //操作
}
ELSE
(RESPONSE.WRITE("请注册"))
 }  
 }    
------解决方案--------------------1,先判断输入账号,密码的正确性
2,用账号查询用户对象
3,再判断密码是否与查询的对象密码符合
4,如果符合就登录成功