LINQ登录方式

本文关键字：方式 登录 LINQ | 更新日期: 2023-09-27 18:16:24

我尝试使用LINQ登录到我的网站。当我尝试登录时，他只是重新加载，没有任何响应。

我的代码:

public partial class Log_in : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }
    private void ActiveLink()
    {
        if (HttpContext.Current.CurrentHandler.ToString().ToLower().Contains("username"))
        {
            username.Attributes.Add("class", "active");
        }
    }
    protected void submit_Click(object sender, EventArgs e)
    {
        SqlConnection con = new SqlConnection("ConnectionString");
        con.Open();
        String usernames = username.Text;
        String passwords = password.Text;
        DataClasses1DataContext daneden = new DataClasses1DataContext();
        var user = (from s in daneden.logins
                    where s.username == usernames && s.passwords == passwords
                    select s);
        if (user != null)
        {
            Response.Redirect("About.aspx");
        }
        else
        {
            usernameerror.Text = "Error!";
        }
        con.Close();
    }
}

LINQ登录方式

 var user = (from s in daneden.logins
                where s.username == usernames && s.passwords == passwords
                select s).FirstOrDefault();
交替

: 

 var user = daneden.logins
        .FirstOrDefault(s=> s.username == usernames && s.passwords == passwords);
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