我想開會,但我不知道從哪裏開始。我登錄自己,但沒有使用會議,我必須進行會議。以下是我迄今爲止所做的代碼。如何在我的代碼中使用會話使用asp.net vb.net
Protected Sub btnLogin_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnLogin.Click
If txt_username.Text = "" Or txt_password.Text = "" Then
error_usr_invalid.Visible = False
If txt_username.Text = "" Then
error_usr_blank.Visible = True
ElseIf txt_username.Text <> "" Then
error_usr_blank.Visible = False
End If
If txt_password.Text = "" Then
error_pwd_blank.Visible = True
ElseIf txt_username.Text <> "" Then
error_pwd_blank.Visible = False
End If
ElseIf txt_username.Text <> "" And txt_password.Text <> "" Then
Dim con As New SqlConnection(ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString)
con.Open()
Dim cmd As New SqlCommand("select * from users where username = '" + txt_username.Text + "' and Password = '" + txt_password.Text + "'", con)
cmd.Parameters.AddWithValue("@username", txt_username.Text)
cmd.Parameters.AddWithValue("@password", txt_password.Text)
Dim da As New SqlDataAdapter(cmd)
Dim dt As New DataTable()
da.Fill(dt)
If dt.Rows.Count > 0 Then
error_usr_invalid.Visible = False
error_usr_blank.Visible = False
error_pwd_blank.Visible = False
Response.Redirect("main.aspx")
Else
error_usr_invalid.Visible = True
error_usr_blank.Visible = False
error_pwd_blank.Visible = False
End If
End If
請通過在此代碼中推薦您的建議來幫助我。