C# 页面加载多次
我正在构建的应用程序有一个不寻常的问题，因此我希望用户可以查看他们创建的广告的预览，单击广告，这是一个动态链接，并进入一个新页面，该页面将显示广告的更多细节。然后，更多详细信息页面将运行以检查查询字符串，将查询字符串的参数传递给从数据库中提取正确详细信息的方法。这一部分工作得很好，但是当返回对象时，页面再次加载，调用相同的方法3次，但使用null参数，返回对不存在的对象的null引用 我试图重构代码，这样当页面加载时，除非搜索参数有效，否则它将无法从数据库中检索。当页面加载时，组件将无法工作，例如图像旋转木马 我已经努力将参数编码到方法中，将非常有效。将只加载一次 我已经创建了两个新页面，它们没有从母版页继承，并且使用了完全相同的方法。工作完美。我在从母版页继承的两个不同页面上尝试了该方法，并且遇到了相同的问题 详细信息Page.aspxC# 页面加载多次,c#,asp.net,.net,master-pages,pageload,C#,Asp.net,.net,Master Pages,Pageload,我正在构建的应用程序有一个不寻常的问题，因此我希望用户可以查看他们创建的广告的预览，单击广告，这是一个动态链接，并进入一个新页面，该页面将显示广告的更多细节。然后，更多详细信息页面将运行以检查查询字符串，将查询字符串的参数传递给从数据库中提取正确详细信息的方法。这一部分工作得很好，但是当返回对象时，页面再次加载，调用相同的方法3次，但使用null参数，返回对不存在的对象的null引用 我试图重构代码，这样当页面加载时，除非搜索参数有效，否则它将无法从数据库中检索。当页面加载时，组件将无法工作，例
<%@ Page Title="" Language="C#" MasterPageFile="~/MasterPage.Master" AutoEventWireup="true" CodeFile="DetailAdvert.aspx.cs" Inherits="Lenders.ie.DetailAdvert" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<div class="col-lg-9">
<div class="container">
<div class="row">
<!--Advert Image -->
<div class="container">
<div class="row">
<!-- Carosel goes here -->
<div class="row carousel-holder">
<div class="col-xs-12 col-sm-12 col-md-12 col-lg-10">
<div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
<ol class="carousel-indicators">
<li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
<li data-target="#carousel-example-generic" data-slide-to="1"></li>
<li data-target="#carousel-example-generic" data-slide-to="2"></li>
</ol>
<div class="carousel-inner">
<div class="item active">
<img class="slide-image" id="Img1" runat="server" src="http://placehold.it/800x380" alt=""/>
</div>
<div class="item">
<img class="slide-image" id="Img2" runat="server" src="http://placehold.it/800x380" alt=""/>
</div>
<div class="item">
<img class="slide-image" id="Img3" runat="server" src="http://placehold.it/800x380" alt=""/>
</div>
</div>
<a class="left carousel-control" href="#carousel-example-generic" data-slide="prev">
<span class="glyphicon glyphicon-chevron-left"></span>
</a>
<a class="right carousel-control" href="#carousel-example-generic" data-slide="next">
<span class="glyphicon glyphicon-chevron-right"></span>
</a>
</div>
</div>
</div>
</div>
</div>
<!--User Details-->
<br />
<div class="container">
<div class="row">
<!-- Descriptin and profile view -->
<div class="col-xs-12 col-sm-6 col-md-6 col-lg-5">
<div class="well well-sm">
<div class="row">
<div class="col-xs-6 col-sm-6 col-md-6 col-lg-6">
<img src="" runat="server" id="imgProfilePic" alt="" class="img-rounded img-responsive" />
</div>
<div class="col-xs-4 col-sm-4 col-md-4 col-lg-4">
<h4>
<asp:Label ID="lblFristName" runat="server" Text=""></asp:Label>
<asp:Label ID="lblSecondName" runat="server" Text=""></asp:Label>
</h4>
<small><cite title="Location"><asp:Label ID="lblLocation" runat="server" Text=""></asp:Label> <i class="glyphicon glyphicon-map-marker">
</i></cite></small>
<p>
<i title="Email" class="glyphicon glyphicon-envelope"></i> <asp:Label ID="lblEmail" runat="server" Text=""></asp:Label>
<br />
<i title="Join Date" class="glyphicon glyphicon-user"></i> <asp:Label ID="lblJoinDate" runat="server" Text=""></asp:Label><br />
<i title="User Rating" class="glyphicon glyphicon-stats"> </i><asp:Label ID="lblUserRating" runat="server" Text=""></asp:Label><br />
<i title="Contact Number" class="glyphicon glyphicon-phone"> </i><asp:Label ID="lblContactNumber" runat="server" Text=""></asp:Label>
</p>
<!-- Split button -->
<asp:Button ID="btnMessage" runat="server" Text="Message" CssClass="btn btn-success" />
</div>
</div>
</div>
</div>
<!-- Description / Product Details-->
<div class="col-xs-12 col-sm-6 col-md-6 col-lg-5">
<div class="well well-sm">
<h4> Description: </h4>
<p>
<asp:Label ID="lblDesc" runat="server" Text=""></asp:Label>
</p>
</div>
</div>
</div>
</div>
<div class="container">
<div class="row">
<!-- Comment Section -->
<div class="col-xs-12 col-sm-12 col-md-12 col-lg-10">
<div class="well well-sm">
<h4>Comments</h4>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder2" runat="server">
</asp:Content>
<%@ Page Title="" Language="C#" EnableEventValidation="false" MasterPageFile="~/MasterPage.Master" AutoEventWireup="true" CodeBehind="ProfilePage.aspx.cs" Inherits="Lenders.ie.ProfilePage1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<div class="container">
<div class="row">
<%-- Adverts View--%>
<asp:View ID="AdvertsView" runat="server">
<h2>Adverts</h2>
</asp:View>
<%-- View Adverts --%>
<asp:View ID="View_ViewAdverts" runat="server">
<h2>View Adverts</h2>
<div class="row">
<asp:Literal ID="Advert1" runat="server"></asp:Literal>
<asp:LinkButton ID="LinkButton1" OnClick="LinkButton1_Click" runat="server">LinkButton</asp:LinkButton>
</div>
</asp:View>
<%--There was three closing divs here--%>
<asp:View ID="MessageView" runat="server">
<h2>Messages</h2>
</asp:View>
</asp:MultiView>
</div>
</div>
</div>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder2" runat="server">
<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="MasterPage.master.cs" Inherits="Lenders.ie.MasterPage" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="author" content="">
<title>Shop Homepage - Start Bootstrap Template</title>
<!-- Bootstrap Core Content -->
<link href="Content/bootstrap.min.css" rel="stylesheet">
<!-- Custom CSS -->
<link href="Content/shop-homepage.css" rel="stylesheet">
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<form id="form1" runat="server">
<!-- Navigation -->
<nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
<div class="container">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<%-- <a class="navbar-brand" href="www.google.com">
</a>--%>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li>
<asp:HyperLink ID="Home" runat="server">Home</asp:HyperLink>
</li>
<li>
<asp:HyperLink ID="Services" runat="server">Services</asp:HyperLink>
</li>
<li>
<asp:HyperLink ID="Contact" runat="server">Contact</asp:HyperLink>
</li>
<li>
<asp:HyperLink ID="Login" runat="server">Log In</asp:HyperLink>
</li>
</ul>
<div class="navbar-form navbar-right">
<div class="input-group input-sm">
<asp:TextBox ID="txtSearch" runat="server" CssClass="form-control form-control-sm " AutoPostBack="true"></asp:TextBox>
<span class="
</span>
</div>
</div>
</div>
<!-- /.navbar-collapse -->
</div>
<!-- /.container -->
</nav>
<div class="container">
<div class="row">
<div class="col-md-3">
<p class="lead">Shop Name</p>
<div class="list-group">
<asp:HyperLink ID="HyperLink1" CssClass="list-group-item" runat="server">Sports</asp:HyperLink>
<asp:HyperLink ID="HyperLink2" CssClass="list-group-item" runat="server">Hobbies</asp:HyperLink>
<asp:HyperLink ID="HyperLink3" CssClass="list-group-item" runat="server">Life Style</asp:HyperLink>
<asp:HyperLink ID="HyperLink4" CssClass="list-group-item" runat="server">Another Example</asp:HyperLink>
<asp:HyperLink ID="HyperLink5" CssClass="list-group-item" runat="server"> Blah </asp:HyperLink>
</div>
</div>
<%-- <div class="col-md-9">
<div class="row carousel-holder">
<div class="col-md-12">--%>
<asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
</asp:ContentPlaceHolder>
<asp:ContentPlaceHolder ID="ContentPlaceHolder2" runat="server">
</asp:ContentPlaceHolder>
</div>
</div>
<%-- </div>
</div>
</div>--%>
<div class="container">
<hr>
<!-- Footer -->
<footer>
<div class="row">
<div class="col-lg-12">
<p>Copyright © Your Website 2014</p>
</div>
</div>
</footer>
</div>
<!-- /.container -->
<!-- jQuery -->
<script src="js/jquery.js"></script>
<!-- Bootstrap Core JavaScript -->
<script src="js/bootstrap.min.js"></script>enter code here
</form>
</body>
</html>
<%@ Page Title="" Language="C#" MasterPageFile="~/MasterPage.Master" AutoEventWireup="true" CodeFile="DetailAdvert.aspx.cs" Inherits="Lenders.ie.DetailAdvert" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<div class="col-lg-9">
<div class="container">
<div class="row">
<!--Advert Image -->
<div class="container">
<div class="row">
<!-- Carosel goes here -->
<div class="row carousel-holder">
<div class="col-xs-12 col-sm-12 col-md-12 col-lg-10">
<div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
<ol class="carousel-indicators">
<li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
<li data-target="#carousel-example-generic" data-slide-to="1"></li>
<li data-target="#carousel-example-generic" data-slide-to="2"></li>
</ol>
<div class="carousel-inner">
<div class="item active">
<img class="slide-image" id="Img1" runat="server" src="http://placehold.it/800x380" alt=""/>
</div>
<div class="item">
<img class="slide-image" id="Img2" runat="server" src="http://placehold.it/800x380" alt=""/>
</div>
<div class="item">
<img class="slide-image" id="Img3" runat="server" src="http://placehold.it/800x380" alt=""/>
</div>
</div>
<a class="left carousel-control" href="#carousel-example-generic" data-slide="prev">
<span class="glyphicon glyphicon-chevron-left"></span>
</a>
<a class="right carousel-control" href="#carousel-example-generic" data-slide="next">
<span class="glyphicon glyphicon-chevron-right"></span>
</a>
</div>
</div>
</div>
</div>
</div>
<!--User Details-->
<br />
<div class="container">
<div class="row">
<!-- Descriptin and profile view -->
<div class="col-xs-12 col-sm-6 col-md-6 col-lg-5">
<div class="well well-sm">
<div class="row">
<div class="col-xs-6 col-sm-6 col-md-6 col-lg-6">
<img src="" runat="server" id="imgProfilePic" alt="" class="img-rounded img-responsive" />
</div>
<div class="col-xs-4 col-sm-4 col-md-4 col-lg-4">
<h4>
<asp:Label ID="lblFristName" runat="server" Text=""></asp:Label>
<asp:Label ID="lblSecondName" runat="server" Text=""></asp:Label>
</h4>
<small><cite title="Location"><asp:Label ID="lblLocation" runat="server" Text=""></asp:Label> <i class="glyphicon glyphicon-map-marker">
</i></cite></small>
<p>
<i title="Email" class="glyphicon glyphicon-envelope"></i> <asp:Label ID="lblEmail" runat="server" Text=""></asp:Label>
<br />
<i title="Join Date" class="glyphicon glyphicon-user"></i> <asp:Label ID="lblJoinDate" runat="server" Text=""></asp:Label><br />
<i title="User Rating" class="glyphicon glyphicon-stats"> </i><asp:Label ID="lblUserRating" runat="server" Text=""></asp:Label><br />
<i title="Contact Number" class="glyphicon glyphicon-phone"> </i><asp:Label ID="lblContactNumber" runat="server" Text=""></asp:Label>
</p>
<!-- Split button -->
<asp:Button ID="btnMessage" runat="server" Text="Message" CssClass="btn btn-success" />
</div>
</div>
</div>
</div>
<!-- Description / Product Details-->
<div class="col-xs-12 col-sm-6 col-md-6 col-lg-5">
<div class="well well-sm">
<h4> Description: </h4>
<p>
<asp:Label ID="lblDesc" runat="server" Text=""></asp:Label>
</p>
</div>
</div>
</div>
</div>
<div class="container">
<div class="row">
<!-- Comment Section -->
<div class="col-xs-12 col-sm-12 col-md-12 col-lg-10">
<div class="well well-sm">
<h4>Comments</h4>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder2" runat="server">
</asp:Content>
<%@ Page Title="" Language="C#" EnableEventValidation="false" MasterPageFile="~/MasterPage.Master" AutoEventWireup="true" CodeBehind="ProfilePage.aspx.cs" Inherits="Lenders.ie.ProfilePage1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<div class="container">
<div class="row">
<%-- Adverts View--%>
<asp:View ID="AdvertsView" runat="server">
<h2>Adverts</h2>
</asp:View>
<%-- View Adverts --%>
<asp:View ID="View_ViewAdverts" runat="server">
<h2>View Adverts</h2>
<div class="row">
<asp:Literal ID="Advert1" runat="server"></asp:Literal>
<asp:LinkButton ID="LinkButton1" OnClick="LinkButton1_Click" runat="server">LinkButton</asp:LinkButton>
</div>
</asp:View>
<%--There was three closing divs here--%>
<asp:View ID="MessageView" runat="server">
<h2>Messages</h2>
</asp:View>
</asp:MultiView>
</div>
</div>
</div>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder2" runat="server">
<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="MasterPage.master.cs" Inherits="Lenders.ie.MasterPage" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="author" content="">
<title>Shop Homepage - Start Bootstrap Template</title>
<!-- Bootstrap Core Content -->
<link href="Content/bootstrap.min.css" rel="stylesheet">
<!-- Custom CSS -->
<link href="Content/shop-homepage.css" rel="stylesheet">
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<form id="form1" runat="server">
<!-- Navigation -->
<nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
<div class="container">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<%-- <a class="navbar-brand" href="www.google.com">
</a>--%>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li>
<asp:HyperLink ID="Home" runat="server">Home</asp:HyperLink>
</li>
<li>
<asp:HyperLink ID="Services" runat="server">Services</asp:HyperLink>
</li>
<li>
<asp:HyperLink ID="Contact" runat="server">Contact</asp:HyperLink>
</li>
<li>
<asp:HyperLink ID="Login" runat="server">Log In</asp:HyperLink>
</li>
</ul>
<div class="navbar-form navbar-right">
<div class="input-group input-sm">
<asp:TextBox ID="txtSearch" runat="server" CssClass="form-control form-control-sm " AutoPostBack="true"></asp:TextBox>
<span class="
</span>
</div>
</div>
</div>
<!-- /.navbar-collapse -->
</div>
<!-- /.container -->
</nav>
<div class="container">
<div class="row">
<div class="col-md-3">
<p class="lead">Shop Name</p>
<div class="list-group">
<asp:HyperLink ID="HyperLink1" CssClass="list-group-item" runat="server">Sports</asp:HyperLink>
<asp:HyperLink ID="HyperLink2" CssClass="list-group-item" runat="server">Hobbies</asp:HyperLink>
<asp:HyperLink ID="HyperLink3" CssClass="list-group-item" runat="server">Life Style</asp:HyperLink>
<asp:HyperLink ID="HyperLink4" CssClass="list-group-item" runat="server">Another Example</asp:HyperLink>
<asp:HyperLink ID="HyperLink5" CssClass="list-group-item" runat="server"> Blah </asp:HyperLink>
</div>
</div>
<%-- <div class="col-md-9">
<div class="row carousel-holder">
<div class="col-md-12">--%>
<asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
</asp:ContentPlaceHolder>
<asp:ContentPlaceHolder ID="ContentPlaceHolder2" runat="server">
</asp:ContentPlaceHolder>
</div>
</div>
<%-- </div>
</div>
</div>--%>
<div class="container">
<hr>
<!-- Footer -->
<footer>
<div class="row">
<div class="col-lg-12">
<p>Copyright © Your Website 2014</p>
</div>
</div>
</footer>
</div>
<!-- /.container -->
<!-- jQuery -->
<script src="js/jquery.js"></script>
<!-- Bootstrap Core JavaScript -->
<script src="js/bootstrap.min.js"></script>enter code here
</form>
</body>
</html>
在你的主页中，在歉收之后删除所有内容，@kami之后没有任何内容