哪些錯誤與此登錄C＃代碼

-4

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Windows; 
using System.Windows.Controls; 
using System.Windows.Data; 
using System.Windows.Documents; 
using System.Windows.Input; 
using System.Windows.Media; 
using System.Windows.Media.Imaging; 
using System.Windows.Navigation; 
using System.Windows.Shapes; 
using System.Data; 
using System.Data.SqlClient; 

namespace aukcijska_p 
{ 
    /// <summary> 
    /// Interaction logic for MainWindow.xaml 
    /// </summary> 
    public partial class MainWindow : Window 
    { 
     public MainWindow() 
     { 
      InitializeComponent(); 
     } 
     private void button1_Click(object sender, RoutedEventArgs e) 
     { 
      string username = textBox1.Text; 
      string password = textBox2.Text; 

      if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password)) 
       MessageBox.Show("Please insert correct values.", "Incorrect Username or password."); 
      else 
      { 
       SqlConnection con = new SqlConnection(@"data source=(local);database=aukcija;integrated security=true;"); 
       con.Open(); 

       SqlCommand cmd = new SqlCommand("Select count(*) from users where name='" + username + "' and password='" + password + "'", con); 

       Int32 returnedCount = (Int32)cmd.ExecuteScalar(); 

       if (returnedCount > 0) 
        new Window(); 
       else 
        MessageBox.Show("Wrong username or password"); 
      } 

     } 
     private void textBox1_TextChanged(object sender, System.Windows.Controls.TextChangedEventArgs e) 
     { 

     } 

     private void textBox2_TextChanged(object sender, System.Windows.Controls.TextChangedEventArgs e) 
     { 

     } 
    }

這：哪些錯誤與此登錄C＃代碼

<Window x:Class="aukcijska_p.MainWindow" 
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
     Title="MainWindow" Height="227" Width="292"> 
    <Grid Height="196" Width="281"> 
     <Label Content="Username:" Height="28" HorizontalAlignment="Left" Margin="37,63,0,0" Name="label1" VerticalAlignment="Top" Width="75" /> 
     <Label Content="Password:" Height="28" HorizontalAlignment="Left" Margin="37,99,0,0" Name="label2" VerticalAlignment="Top" Width="75" /> 
     <Button Content="Confirm" Height="23" HorizontalAlignment="Left" Margin="157,133,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" /> 
     <TextBox Height="23" HorizontalAlignment="Left" Margin="112,68,0,0" Name="textBox1" VerticalAlignment="Top" Width="120" TextChanged="textBox1_TextChanged" /> 
     <TextBox Height="23" HorizontalAlignment="Left" Margin="112,101,0,0" Name="textBox2" VerticalAlignment="Top" Width="120" TextChanged="textBox2_TextChanged" Visibility="Visible" /> 
    </Grid> 
</Window>

它調試normaly，但是當我按下確認，我得到消息：該程序停止working..where做我我犯了一個錯誤？任何人都可以幫助我？香港專業教育學院做SQL數據庫與此表：用戶：USER_ID，用戶名，userPassword的，user_level

繼承人的形象： http://www39.zippyshare.com/v/97161315/file.html

來源

2013-02-22 LuChA

嗯，它很容易受到SQL注入攻擊，一件事... – 2013-02-22 19:47:23

*不要以純文本存儲密碼* – SLaks 2013-02-22 19:47:42

重新發布您的代碼不會得到答案。請使用你的其他線程。 – Brian 2013-02-22 19:47:51

Select count(*) from users where name=

應該是：

Select count(*) from users where username=

它是這麼說的錯誤信息。「無效的列名稱」。克蒙人，你需要更加努力！不要放棄！

但正如其他人所說的那樣，代碼還存在許多其他問題。我建議閱讀一般的數據庫訪問，或者學習像繞過許多這些問題的實體框架。

來源

2013-02-22 20:06:05 Quibblesome

謝謝你，我會試着改正這一點。 – LuChA 2013-02-22 20:19:58

哪些錯誤與此登錄C＃代碼

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