page_load..中のhiddenfieldsに値を割り当てようとしていますが、System.NullReferenceException.をスローしています..これは、page_loadイベントで使用しているコードです..
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
Handles Me.Load
Dim hLogInfo As HiddenField = DirectCast(FindControl("HLogInfo"), HiddenField)
Dim hUName As HiddenField = DirectCast(FindControl("HUName"), HiddenField)
If Not Page.User.Identity.IsAuthenticated Then
Response.Write("not logged in")
hLogInfo.Value = "No"
hUName.Value = "None"
Else
Dim currentUser As MembershipUser = Membership.GetUser()
hUName.Value = currentUser.UserName
Response.Write(currentUser.UserName)
hLogInfo.Value = "Yes"
End If
End Sub
以下にエラーの詳細を示します...
Server Error in '/colorshelf.com' Application.
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information about
the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to
an instance of an object.
Source Error:
Line 41: Else
Line 42: Dim currentUser As MembershipUser = Membership.GetUser()
Line 43: hUName.Value = currentUser.UserName
Line 44: Response.Write(currentUser.UserName)
Line 45: hLogInfo.Value = "Yes"
Source File: G:\Websites\colorshelf.com\html\*******.***.vb Line: 43
Stack Trace:
[NullReferenceException:Object reference not set to an instance of an object.]
****_****.Page_Load(Object sender, EventArgs e) in
G:\Websites\colorshelf.com\html\******.***.vb:43
System.Web.UI.Control.OnLoad(EventArgs e) +91
System.Web.UI.Control.LoadRecursive() +74
System.Web.UI.Control.LoadRecursive() +146
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint,
Boolean includeStagesAfterAsyncPoint) +2207
Version Information: Microsoft .NET Framework Version:4.0.30319;
ASP.NET Version:4.0.30319.1
以下のようなコードを変更すると、同じエラーがスローされます
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
Handles Me.Load
If Not Page.User.Identity.IsAuthenticated Then
Response.Write("not logged in")
HLogInfo.Value = "No"
HUName.Value = "None"
Else
Dim currentUser As MembershipUser = Membership.GetUser()
HUName.Value = currentUser.UserName
Response.Write(currentUser.UserName)
HLogInfo.Value = "Yes"
End If
End Sub
以下、ページソースです。
<%@ Master Language="VB" MasterPageFile="../**.master" AutoEventWireup="false" CodeFile="***.master.vb"
Inherits="***_****" %>
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="Server">
<asp:ContentPlaceHolder ID="HeadContentSubMaster" runat="server">
<script type="text/javascript">
</script>
</asp:ContentPlaceHolder>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="Server">
<div style="width: 100%; float: left;">
<div style="width: 16%; float: left;" align="center">
<div style="color: #FFFFFF; font-weight: bold; font-size: 14px; width: 100%; padding-top: 37px;"
align="center">
Colorshelf list
<br />
<hr width="70%" />
</div>
<table border="0" style="border-collapse: separate; padding-top: 7px;">
</table>
</div>
</div>
<div style="width: 56%; float: left; margin-left: 20px;">
<asp:ContentPlaceHolder ID="BodyContent" runat="server">
</asp:ContentPlaceHolder>
</div>
<div style="width: 22%; float: right;">
<a href="http://www.lalsofttech.com/MRanking/Default.aspx" style="border-style: none">
<img src="../Images/MRA_Banner.png" style="border-style: none; width: 92%; padding-left: 30px;
padding-top: 50px;" /></a>
</div>
</div>
<div style="width: 100%; float: left;">
<div style="width: 80%; float: left;">
<asp:ContentPlaceHolder ID="ContentFooter" runat="server">
<asp:HiddenField ID="HLogInfo" runat="server" Value="" />
<asp:HiddenField ID="HUName" runat="server" Value="" />
</asp:ContentPlaceHolder>
</div>
</div>
<div class="clear">
<br />
<br />
</div>
この問題を解決するために私を案内してください???