I have a website that I published before adding it in IIS. After that I set the published website as the default website in IIS.
I got an error that the "Object reference is not set to the instance of an object" when I inserted values through form. There is no issues when the website is running in IIS without publishing. The error occurs when values are inserted using datagrid.
The error messages is as follows:
Server Error in '/' 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:
An unhandled exception was generated
during the execution of the current
web request. Information regarding the
origin and location of the exception
can be identified using the exception
stack trace below.
Stack Trace:
[NullReferenceException: Object
reference not set to an instance of an
object.]
Admin_MasterEntries.gvwMileStoneM_RowCommand(Object
sender, GridViewCommandEventArgs e)
+447 System.Web.UI.WebControls.GridView.OnRowCommand(GridViewCommandEventArgs
e) +105
System.Web.UI.WebControls.GridView.HandleEvent(EventArgs
e, Boolean causesValidation, String
validationGroup) +76
System.Web.UI.WebControls.GridView.OnBubbleEvent(Object
source, EventArgs e) +95
System.Web.UI.Control.RaiseBubbleEvent(Object
source, EventArgs args) +35
System.Web.UI.WebControls.GridViewRow.OnBubbleEvent(Object
source, EventArgs e) +117
System.Web.UI.Control.RaiseBubbleEvent(Object
source, EventArgs args) +35
System.Web.UI.WebControls.LinkButton.OnCommand(CommandEventArgs
e) +115
System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String
eventArgument) +163
System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String
eventArgument) +7
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler
sourceControl, String eventArgument)
+11 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection
postData) +174
System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean
includeStagesAfterAsyncPoint) +5102
If any one knows please help me. Thank you.
That exception is caused by an object not being instantiated. Open the project and attach a debugger to the IIS process. A web service which is consuming the ASP.NET page is throwing the exception.
Try this:
Click your site in IIS
Open Pages and Controls section
Find ViewState group and check if ViewState is enabled.
Such solution helped me to solve null reference exception problem after publish.
Related
I am developing an ASP.NET Application in VISUAL STUDIO 2013, while adding REQUIRED FIELD VALIDATOR , am getting error at RUNTIME .. and the error is below ... Please Help Me to crack this problem
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
{
[InvalidOperationException: WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for 'jquery'. Please add a ScriptResourceMapping named jquery(case-sensitive).]
System.Web.UI.ClientScriptManager.EnsureJqueryRegistered() +2179162
System.Web.UI.WebControls.BaseValidator.RegisterUnobtrusiveScript() +10
System.Web.UI.WebControls.BaseValidator.OnPreRender(EventArgs e) +9708897
System.Web.UI.Control.PreRenderRecursiveInternal() +83
System.Web.UI.Control.PreRenderRecursiveInternal() +155
System.Web.UI.Control.PreRenderRecursiveInternal() +155
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +974}
Add the below code to the Application_Start method in your Global.aspx:
protected void Application_Start(object sender, EventArgs e)
{
ScriptManager.ScriptResourceMapping.AddDefinition("jquery", new ScriptResourceDefinition
{
Path = "~/scripts/jquery-1.4.1.min.js",
DebugPath = "~/scripts/jquery-1.4.1.js",
CdnPath = "http://ajax.microsoft.com/ajax/jQuery/jquery-1.4.1.min.js",
CdnDebugPath = "http://ajax.microsoft.com/ajax/jQuery/jquery-1.4.1.js"
});
}
Here is the error I get when going to a website on the IIS v6.0 server that is running SQL Server 2000, which I'm hosting. I have moved this server from another location and so I'm wondering if it can't find the database. What do you recommend? thanks
Server Error in '/' 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 38: {
Line 39: ds = dbCat.Getcategories();
Line 40: DataRow dr = ds.Tables[0].NewRow();
Line 41: dr["id"] = "0";
Line 42: dr["name"] = "All";
Source File: c:\webapps\pbxc.new-web.09302009\PBXC_Updated_\Website\support.aspx.cs Line: 40
Stack Trace:
[NullReferenceException: Object reference not set to an instance of an object.]
support.loadCategories() in c:\webapps\pbxc.new-web.09302009\PBXC_Updated_\Website\support.aspx.cs:40
support.Page_Load(Object sender, EventArgs e) in c:\webapps\pbxc.new-web.09302009\PBXC_Updated_\Website\support.aspx.cs:25
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +50
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627
Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053
If you have access to the project then you should be able to put a break point in on line 40 of the support.aspx.cs file and see whether dbCat.Getcategories() actually returns something. If it it can be null then you should have a conditional statement to check for this.
Please add the below snippet after ds= dbCat.Getcategories()
if (ds !=null)
{
//your code
}
else
{
}
I tried deploying an ASP.NET application in IIS server 7. I am using Windows 7. While deploying i am getting the error "Cannot find table 0."
Exception Details: System.IndexOutOfRangeException: Cannot find table 0
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[IndexOutOfRangeException: Cannot find table 0.]
System.Data.DataTableCollection.get_Item(Int32 index) +95
LHS.RightColumn.Page_Load(Object sender, EventArgs e) in C:\Saravanan\Saravanan\Saravanan\LHS\LHS\RightColumn.ascx.cs:33
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +91
System.Web.UI.Control.LoadRecursive() +74
System.Web.UI.Control.LoadRecursive() +146
System.Web.UI.Control.LoadRecursive() +146
System.Web.UI.Control.LoadRecursive() +146
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207
Please help me how to resolve this.
In Visual Studio this application is running fine.
But in IIS it is showing this error.
Please help me in this
I had this error some weeks back and it occurred because the web.config file was incorrect. The database information was invalid. Hopefully, this will help you.
I keep getting the following error when trying to run an application in the production environment with "anonymous" authentication and hardcoded username.
When I turn on basic authentication, which then prompts for username/password everything works like a charm. but I need to get the hardcoded version to work as well. Can't figure out whats going on.
Everything works perfectly on another server.
Exception Details: System.DirectoryServices.DirectoryServicesCOMException: An operations
error occurred.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of
the exception can be identified using the exception stack trace below.
Stack Trace:
[DirectoryServicesCOMException (0x80072020): An operations error occurred.]
System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail) +781
System.DirectoryServices.DirectoryEntry.Bind() +44
System.DirectoryServices.DirectoryEntry.get_SchemaEntry() +49
System.DirectoryServices.AccountManagement.ADStoreCtx.IsContainer(DirectoryEntry
de) +62
System.DirectoryServices.AccountManagement.ADStoreCtx..ctor(DirectoryEntry
ctxBase, Boolean ownCtxBase, String username, String password,
ContextOptions options) +123
System.DirectoryServices.AccountManagement.PrincipalContext.CreateContextFromDirectoryEntry(DirectoryEntry
entry) +234
System.DirectoryServices.AccountManagement.PrincipalContext.DoLDAPDirectoryInit()
+497
[PrincipalOperationException: An operations error occurred.]
System.DirectoryServices.AccountManagement.PrincipalContext.DoLDAPDirectoryInit()
+534256
System.DirectoryServices.AccountManagement.PrincipalContext.DoDomainInit()
+61
System.DirectoryServices.AccountManagement.PrincipalContext.Initialize()
+141
System.DirectoryServices.AccountManagement.PrincipalContext.get_QueryCtx()
+42
System.DirectoryServices.AccountManagement.Principal.FindByIdentityWithTypeHelper(PrincipalContext
context, Type principalType, Nullable`1 identityType, String
identityValue, DateTime refDate) +27
System.DirectoryServices.AccountManagement.GroupPrincipal.FindByIdentity(PrincipalContext
context, String identityValue) +95
SERT_BO.ADHelper.UserBelongsToGrp(String adGroup, String sAMAccountName, String& emailAddr, String& fullName) in
D:\SERT\BusinessObjects\SERT_BO\ADHelper.cs:199
SERT_BO.UserSession.GetUserSession(String userName) in D:\SERT\BusinessObjects\SERT_BO\UserSession.cs:44
SERT.SetUserSession.Page_Load(Object sender, EventArgs e) in D:\SERT\SERT\SERT\SetUserSession.aspx.cs:23
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +25
System.Web.UI.Control.LoadRecursive() +71
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
+3064
One thing to check is that the AppPool in which the ASP.NET app is running has the right privileges. As a quick test you can set the identity of the AppPool to Local System and see if this solves the issue. If the problem is here, then you can set the application pool identity to a (domain?) user that has enough privileges on this server.
looks like the issue was that the server was looking at the wrong AD controller. it had to be written out COMPLETELY.
I'm using Activedirectory as membership provider. I want to store the current logged in user in a session.
protected void user_login_LoggedIn(object sender, EventArgs e)
{
MembershipUser user = Membership.GetUser();
}
the code above gives the error below
The parameter 'username' must not be empty.
Parameter name: username
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.ArgumentException: The parameter 'username' must not be empty.
Parameter name: username
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[ArgumentException: The parameter 'username' must not be empty.
Parameter name: username]
System.Web.Util.SecUtility.CheckParameter(String& param, Boolean checkForNull, Boolean checkIfEmpty, Boolean checkForCommas, Int32 maxSize, String paramName) +1976411
System.Web.Security.ActiveDirectoryMembershipProvider.CheckUserName(String& username, Int32 maxSize, String paramName) +30
System.Web.Security.ActiveDirectoryMembershipProvider.GetUser(String username, Boolean userIsOnline) +86
System.Web.Security.Membership.GetUser(String username, Boolean userIsOnline) +82
System.Web.Security.Membership.GetUser() +19
darts.login.user_login_LoggedIn(Object sender, EventArgs e) in E:\Projects\DARTS\source\darts\darts\login.aspx.cs:24
System.Web.UI.WebControls.Login.OnLoggedIn(EventArgs e) +111
System.Web.UI.WebControls.Login.AttemptLogin() +179
System.Web.UI.WebControls.Login.OnBubbleEvent(Object source, EventArgs e) +101
System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +37
System.Web.UI.WebControls.Button.OnCommand(CommandEventArgs e) +118
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +166
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1565
Version Information: Microsoft .NET Framework Version:2.0.50727.4211; ASP
Edit:
Based upon using this from ASP.NET to get the login information about the currently authenticated user, I see a couple ways that this might work. First, if you are using Forms authentication with the Active Directory membership provider, you could capture the username there. Then you just put the username inside of the GetUser() method like so: GetUser(yourUser) and you should get the information needed.
If this isn't an option, I believe the username information is stored under your login control (in your case, I believe the name is user_login if you are indeed using a login control). You would simply say user_login.username and put that inside the GetUser() method.
Finally, you could try the old fallback of HttpContext.Current.User.Identity.Name and put that inside of your GetUser() method.