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我試圖製作一個連接到數據庫的ASP.NET基本站點。它應該允許用戶註冊並登錄。按鈕只能在第二次點擊上工作
我使用javascript檢查輸入並在代碼背後以防萬一它被禁用。
問題是，只要我第一次點擊註冊，登錄或註銷按鈕，他們將無法工作;該頁面保持不變。 然而，他們第二次完美地工作。調試器說它被稱爲兩次。
有什麼想法？
ASP：
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Main.aspx.cs"
Inherits="Register_and_Login.Main" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<script type="text/javascript">
function isUserValid() {
var UserLength = document.getElementById("UserTB").value.length;
var ValidatorLabel = document.getElementById("ValidateUser");
if (UserLength < 6 || UserLength > 15) {
ValidatorLabel.style.display = 'inline';
return false;
}
else {
ValidatorLabel.style.display = 'none';
return true;
}
}
function isPassValid() {
var PassLength = document.getElementById("PasswordTB").value.length;
var ValidatorLabel = document.getElementById("ValidatePassword");
if (PassLength < 6 || PassLength > 15) {
ValidatorLabel.style.display = 'inline';
return false;
}
else {
ValidatorLabel.style.display = 'none';
return true;
}
}
function isConfirmValid() {
var Password = document.getElementById("PasswordTB").value;
var Me = document.getElementById("ConfirmTB").value;
var ValidatorLabel = document.getElementById("ValidateConfirm");
if (Password == Me) {
ValidatorLabel.style.display = 'none';
return true;
}
else {
ValidatorLabel.style.display = 'inline';
return false;
}
}
function isEmailValid() {
var str = document.getElementById("EmailTB").value;
var lastAtPos = str.lastIndexOf('@');
var lastDotPos = str.lastIndexOf('.');
var isFine = (lastAtPos < lastDotPos && lastAtPos > 0 && str.indexOf('@@') == -1 && lastDotPos > 2 && (str.length - lastDotPos) > 2);
var ValidationLabel=document.getElementById("ValidateEmail");
if(isFine)
{
ValidationLabel.style.display='none';
return true;
}
else
{
ValidationLabel.style.display='inline';
return false;
}
}
</script>
<title></title>
<style type="text/css">
.Validators
{
display:none;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Panel id="RegisterRelated" runat="server">
Username:<br />
<asp:TextBox ID="UserTB" runat="server" OnChange="isUserValid()" AutoPostBack="false"></asp:TextBox>
<asp:Label ID="ValidateUser" runat="server" ForeColor="Red"
Text="Username must be 6-15 characters in length, and contain no special characters." CssClass="Validators"></asp:Label>
<br />
Password:<br />
<asp:TextBox ID="PasswordTB" runat="server" OnChange="isPassValid()" AutoPostBack="false"></asp:TextBox>
<asp:Label ID="ValidatePassword" runat="server" ForeColor="Red"
Text="Password must be 6-15 characters in length, and contain no special characters." CssClass="Validators"></asp:Label>
<br />
Confirm password:<br />
<asp:TextBox ID="ConfirmTB" runat="server" OnChange="isConfirmValid()" AutoPostBack="false"></asp:TextBox>
<asp:Label ID="ValidateConfirm" runat="server" ForeColor="Red"
Text="This field must match the password field." CssClass="Validators"></asp:Label>
<br />
Email:<br />
<asp:TextBox ID="EmailTB" runat="server" OnChange="isEmailValid()" AutoPostBack="false"></asp:TextBox>
<asp:Label ID="ValidateEmail" runat="server" ForeColor="Red" Text="Invalid Email." CssClass="Validators"></asp:Label>
<br />
<br />
<asp:Button ID="Register" runat="server" Text="Register" onclick="Register_Click" EnableViewState="false"/>
<br />
<asp:Panel ID="Answer" runat="server" >
</asp:Panel>
</asp:Panel>
<br />
<br />
<asp:Panel id="LoginRelated" runat="server">
User:
<asp:TextBox ID="LoginUserTB" runat="server" AutoPostBack="false"></asp:TextBox>
<br />
Password:
<asp:TextBox ID="LoginPassTB" runat="server" AutoPostBack="false"></asp:TextBox>
<br />
<asp:Button ID="Login" runat="server" Text="Login" onclick="Login_Click" EnableViewState="false" />
<br />
</asp:Panel>
<asp:Panel ID="InPage" runat="server">
<asp:Panel ID="LogAnswer" runat="server">
</asp:Panel>
<br />
<asp:Label ID="WelcomeTag" runat="server"></asp:Label>
<br />
<br />
<asp:Button ID="logout" runat="server" onclick="logout_Click" Text="Logout" EnableViewState="false"/>
</asp:Panel>
</div>
</form>
</body>
</html>
C＃登錄，退出&註冊按鈕：
protected void Register_Click(object sender, EventArgs e)
{
Label Reply = new Label();
if (Session["User"] == null)
{
Result myRegResult = Result.IN_PROG;
User myAddedUser = new User(UserTB.Text, PasswordTB.Text, EmailTB.Text);
DbManager.OpenDbConnection();
myRegResult = DbManager.Register(myAddedUser); //Connection with the database.
Reply.Text = resultToString(myRegResult);
Reply.ForeColor = resultColor(myRegResult);
}
else
{
Reply.Text = "You must log out before you register.";
Reply.ForeColor = resultColor(Result.EXEC_ERROR);
}
Answer.Controls.Add((Control)Reply);
//Reset_Fields();
}
protected void Login_Click(object sender, EventArgs e)
{
Label Reply = new Label();
LoginProc Status = LoginProc.IN_PROG;
DbManager.OpenDbConnection();
Status = DbManager.Login(LoginUserTB.Text, LoginPassTB.Text); //Connection with the database
Reply.Text = ProcToString(Status);
Reply.ForeColor = ProcToColor(Status);
LogAnswer.Controls.Add(Reply);
if (Status == LoginProc.FINE)
Session["User"] = new User(LoginUserTB.Text, LoginPassTB.Text, null);
//Reset_Fields();
}
protected void logout_Click(object sender, EventArgs e)
{
Session["User"] = null;
}
頁面加載：
protected void Page_Load(object sender, EventArgs e)
{
if (Session["User"] != null)
{
RegisterRelated.Visible = false;
LoginRelated.Visible = false;
InPage.Visible = true;
WelcomeTag.Text = "Welcome, " + ((User)Session["User"]).Username + ".";
}
else
{
RegisterRelated.Visible = true;
LoginRelated.Visible = true;
WelcomeTag.Text = String.Empty;
InPage.Visible = false;
}
}
編輯：我的一個朋友勸我去看看在ASP.NET頁面生命週期中，它可能與數據庫交互有關在頁面出現後完成，如果有幫助的話。
我實在看不出這裏有什麼問題。我仍然使用您編寫的代碼創建了一個示例應用程序。但一切似乎都在我的最後工作正常。你是否看到任何特定的錯誤或其他行爲？ –
它運作良好，唯一的問題是我必須在點擊兩次之前點擊按鈕。它適合你嗎？你使用的是什麼瀏覽器？ –
我試過IE11和Chrome。 –