想要个比较正规了登陆和主界面的登陆代码,
刚才baidu一下,什么东西都有,而且都是重复的
感觉用起hide(),close()比较乱,看看高手的代码,学习下
刚才baidu一下,什么东西都有,而且都是重复的
感觉用起hide(),close()比较乱,看看高手的代码,学习下
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static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
frmLogin myLogin = new frmLogin();
if (myLogin.ShowDialog() == DialogResult.OK)
{
Application.Run(new frmMain());
}
//else
//{
// MessageBox.Show("登录失败!");
//}
}frmLogin.cs
private void btnOK_Click(object sender, EventArgs e)
{
//可以到数据库中验证
if (txtUserName.Text == "test" && txtUserPWD.Text == "test")
{
this.DialogResult = DialogResult.OK;
}
else
{
MessageBox.Show("错误的用户名或密码!");
txtUserName.Focus();
}
}
private void btnCancel_Click(object sender, EventArgs e)
{
this.DialogResult = DialogResult.Cancel;
}
private void frmLogin_FormClosing(object sender, FormClosingEventArgs e)
{
if (this.DialogResult != DialogResult.Cancel && this.DialogResult != DialogResult.OK)
e.Cancel = true;
}
{
SqlConnection con = db.con();
string queryStr = "select * from users where user_id='" + Request.Form["UserID"] + "'";
SqlDataAdapter userAdapter = new SqlDataAdapter(queryStr,con);
DataSet userSet = new DataSet();
userAdapter.Fill(userSet, "users");
if (userSet.Tables["users"].Rows.Count == 0)
{
Message.Text = "没有这个用户,请重新输入";
return;
}
if (UserPassword.Value != userSet.Tables["users"].Rows[0]["user_pwd"].ToString())
{
Message.Text = "密码输入错误,请重新输入";
return;
}
FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(UserID.Value, false, 1800);
FormsAuthentication.RedirectFromLoginPage(UserID.Value, false);
// Session["userid"] = Request.Form["UserID"];
return;
}
{
if (Page.IsValid)
{
lblMessage.Text = string.Empty; if(ValidateLogin(txtUserName.Text.Trim(), txtPassword.Text.Trim())
{
//登陆成功操作
}
}
}private static bool ValidateLogin(string username, string password)
{
SqlConnection cn = new SqlConnection(@"server=.\sqlExpress;uid=sa;pwd=;database=Wish");
SqlCommand cmd = new SqlCommand("select 1 from [Users] where username = @UserName and [password] = @CryptPassword", cn);
cmd.Parameters.Add("@UserName", SqlDbType.VarChar).Value = txtUserName.Text.Trim();
cmd.Parameters.Add("@CryptPassword", SqlDbType.VarChar).Value = Tool.EncryptPassword(txtPassword.Text.Trim()); try
{
cn.Open();
object o = cmd.ExecuteScalar();
if (o != null)
{
return true;
}
}
catch (Exception)
{
return false;
}
finally
{
if (cn.State == ConnectionState.Open)
cn.Close();
}
return false;
}
if (myLogin.ShowDialog() == DialogResult.OK)
{
Application.Run(new frmMain(这里写要传的参数));当然记得在frmMain里定义带参数的构造函数
}