ADO.NET :: Error - The Object Cannot Be Deleted Because It Was Not Found In The ObjectStateManager Error...
Sep 4, 2010The object cannot be deleted because it was not found in the ObjectStateManager error ...
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Similar Messages:
Can't Delete Object - Not Found In ObjectStateManager
Feb 18, 2011I use EF 4 and C#. I have 3 Tables in my DataBase
CmsMasterPages
CmsMasterPagesAdvSlots (Pure Juction Table)
CmsAdvSlots
Here a Picture of my EDM:
I need find out all objects CmsAdvSlot connected with a CmsMasterPage (it is working in my code posted belove), and DELETE the result (CmsAdvSlot) from the DataBase. My Problem is I am not able to DELETE this Objects when I found theme.
Error: The object cannot be deleted because it was not found in the ObjectStateManager.
int findMasterPageId = Convert.ToInt32(uxMasterPagesListSelector.SelectedValue);
CmsMasterPage myMasterPage = context.CmsMasterPages.FirstOrDefault(x => x.MasterPageId == findMasterPageId);
var resultAdvSlots = myMasterPage.CmsAdvSlots;
// It is working until here
foreach (var toDeleteAdv in resultAdvSlots)
{
context.DeleteObject(myMasterPage.CmsAdvSlots.Any()); // ERORR HERE!!
context.SaveChanges();
}
ADO.NET :: Error - Key Already Exists In The ObjectStateManager
Feb 17, 2011I have a property object that has many activities associated to it. I want to delete all the activities and then add specific ones back in. I am doing this all before the objectcontext save. I am using multiple objectcontexts and attaching/detaching the objects. I am getting the property from the propertyreository objectcontext which is the primary context. Then I get the user which takes a bool to determine if I want to detach from the userrepository object context. I attach to the propertyrepository.
All is good but when I remove all the activities from the property object (entityobject) and then try to attach the activity that I retrieve from the database I get the error: key already exists in the ObjectStateManager Error. When I remove all the activity entity objects from the property entity object they are not really deleted from the objectcontext or the database until I use the save() on the objectcontext which will change all the entity object statuses. How then after I remove the activity do i add it back to the property.Activities?
Controller
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Property class
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Object Reference - Get An Object Ref Error Show Class Name With Error?
Jan 24, 2011When I get an Object Ref error, it can sometimes be a real pain to find out which variable is causing the error (when you can't debug). Is there a way for this error to throw the classname that isn't assigned?
View 2 RepliesJQuery :: Implment A Simple Function like A Show() Giving This Error: "Microsoft JScript Runtime Error: Object Expected"?
Feb 13, 2011I am new to jquery in asp.net mvc2 and was trying to implment a simple jquery function like a show() function on my system but it keeps giving me this error:
"Microsoft JScript runtime error: Object expected"
this is my code:
[Code]....
MVC :: Error - The Resource Cannot Be Found
Apr 24, 2010i've got a problem with asp.net routing. My route looks like this:
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but if there is a directory with the same name (in my case: "Articles") in my root directory, asp.net routing doesn't work and causes the error: "The resource cannot be found."
Error Saying That The XML File Can't Be Found?
Sep 27, 2010I'm working on a custom menu system in asp.net that populates a horizontal menu on the fly based on which menu item is selected from the website's main menu.This 2nd menu is populated from a custom XML file in the website's root directory.(See http://loganyoung.wordpress.com/2010/06/03/asp-net-horizontal-submenu-from-xml/ for details).At the time I'd written that post, it did work, but my development environment has changed and now I'm getting an error saying that the XML file can't be found.
View 2 RepliesMVC :: File Not Found 404 Error On IIS 6?
Jan 5, 2011OK, I was having some deployment issues on IIS 5.1, but at one point (right before the machine died) I was able to serve the files. I'm not certain what is lacking in my current case, but now I'm trying to deploy on IIS 6, and cannot get anything but "404 not found" errors. It's driving me nuts.
Just to be sure the site is working, because it isn't in the web root (virtual directory), I dumped a Web Forms website in there, and it worked just fine. I've tried setting up a wildcard in IIS by going to the properties of the site, and in the area under the file extension mappings, I clicked Insert to create a wildcard, assigning it to the aspnet_isapi.dll file. No dice. And yes, I remembered to uncheck the "Verify file exists" checkbox. Since this is IIS 6, I also made sure I had the Default.aspx page, with the code:
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So all should be good. But it's not. I've combed over at least 6 websites and related links on getting MVC 2 to work on IIS 6, but nothing has worked so far. I cannot purchase the url rewritier mentioned in Steve Sanderson's blog, nor can I use the free version, since my application isn't the only web site running on this server. I can't use extensions for the pages, either. This is a crude hack I really don't want to deploy in a production application.
MVC :: The Resource No Found Error In .net ?
Feb 21, 2011I'm using asp.net mvc 2 applications and while clicking on the link,it shows the error as "HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly."The site was deployed in my localhost (IIS 6) web server.For example the link
http://localhost/news/details/My_First_News_title shows the above error but the link
http://localhost/news/index works fine in the browser.And also we added wildcard in IIS configuration and unchecked the "verify file exists options in IIS.
MVC :: Selectlist Could Not Be Found Error?
Dec 24, 2010i have wrote the following code inside a model class, but there was an error that indicates that the select list could not be found:-
public SelectList Countries {
get;
private
set; }
so which "using system" i should add????
Web Forms :: Session Ended - But Server Error/ Object Reference Not Set To An Instance Of Object?
Nov 15, 2010In the VS2005 environment, when I test my session to make sure the page redirects to the main page (itself) if the session is null, it works. There is no error.
The function I use for this is:
[code]....
However, when it is in the production environment in IIS 6.0, when the session has timed out, and I then do a postback by doing some slider control, I see the page reload but immediately thereafter, it throws a Server Error exception of : Object reference not set to an instance of object.
Looking at the stack trace, the event occured:
AJAXEnabledWebApplication1._Default.Slider1_TextChanged(Object sender, EventArgs e)
however, why is it that the Slider1_TextChanged event fired even even after during page_load, the page was told to do a response.direct ?? shouldn't the entire page have gone through a full-page refresh life cycle ? why did it continue on to attempt to raise the Slider1_TextChanged event?
Web Forms :: Error When Using A BasePage Along With A Master Page/ Object Reference Not Set To An Instance Of An Object
Mar 6, 2010I'm new to programming in ASP.NET, but I'm making my way through Wrox's Beginning ASP.NET 3.5 in C# and VB.NET.
I'm at a section where I'm creating a BasePage. I successfully created a BasePage by creating a new class file in my App_Code folder called BasePage.cs with the following code:
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If I run that code everything works out fine. The page loads and all is well. But, if I try to do the same thing to a page that uses my MasterPage.master file, I get the following error:
Object reference not set to an instance of an object.
Description:
An unhandled exception occurred during the execution of the current web request. 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.
Why is that? In the example code from the book (that also uses a MasterPage.master file), everything excutes and runs just fine. But in my test, I get the above error. I've tried comparing my pages to the books included source pages, but I can't find any differences.
Web Forms :: Accessing Control In Usercontrol / Error: Object Reference Not Set To An Instance Of An Object
Apr 19, 2010In the same Code behind file I have:
// This works
Label lblTopNavBarInfo = (Label)Master.FindControl("lblTopNavBarInfo");
lblTopNavBarInfo.Text = "Currently Serving: + FirstName + " " + LastName ;
// This compiles but throws an error in the browser
LinkButton lnkBtnProductsOwned = (LinkButton)LeftNav_CustServ1.FindControl("ProductsOwned"); // The Control is visible
lnkBtnProductsOwned.Enabled = false; // Error: Object reference not set to an instance of an object.
State Management :: PollLockedSessionCallback Error After Migrating To 2.0/ Object Reference Not Set To An Instance Of An Object
Aug 19, 2010We have an applicaiton that was converted to the new framework using the wizard in Visual Studio 2008. When we install the applicaiton in production and change the iis settings to use the 2.0 framework we start to see these errors in the event viewer on the web servers. We are using SQL Server Session State and have 3 web servers in a load balancer. Object reference not set to an instance of an object.</Message><StackTrace> at System.Web.SessionState.SessionStateModule.PollLockedSessionCallback...
View 1 RepliesWeb Forms :: Error When Converting Session To String / Object Reference Not Set To Instance Of Object
May 7, 2015I am getting object refernce error at line:if (Session["Tax"].ToString() == "9")
protected void Page_Load(object sender, EventArgs e)
{
if (Session["Tax"].ToString() == "9")
{
lblTax.Text = Session["Tax"].ToString();
}
else
{
lblTax.Text = "0";
}
}
Is anything wrong I have done?
Web Forms :: Error When Adding To Listbox / Object Reference Not Set To An Instance Of An Object
Feb 19, 2010I have just recently converted my VB code to C# and now having this error when I try to add an item to my listbox, and the value is coming from the item page. I get the error at this segement:
lstboxCart.Items.Add(cartItem.Display());
My listbox is supposed to add the product's name, quantity, and price onto one row.
Here's what I have so far:
[code]...
[Code]....
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My guess is that the source of the problem could be in the foreach loop from my cart class, shouldn't I be using that for arrays only? If I need to post any markup code or any other class, let me know.
Forms Data Controls :: Get Error : Object Reference Not Set To An Instance Of An Object
Dec 2, 2010I have a nested gridview
i get error:Object reference not set to an instance of an object
when i try to get the text in the footer template of the inner gridview when clicking on the linkbutton!!!
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Crystal Reports :: Error Object Reference Not Set To An Instance Of An Object When Run The Site
May 27, 2010I have the following code in my form load that loads the reports and assigns it to crystalreportviewer control. If Not IsPostBack Then
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Following is the ApplyCRLogin Class
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Now when I run the site it prompts me for the parameters and when I enter them and click on OK, I get the following error. "Object reference not set to an instance of an object." But the strange thing is if I comment the "If Not IsPostBack Then" condition, my report works fine. The problem is even when I want to go to the next page in report, the code get executed again and this takes time. Is there any other way to fix this?
MVC :: Error In Movie Database Application / Object Reference Not Set To An Instance Of An Object
Jul 17, 2010I am trying to run the 15 minutes movies MVC application but I got the following error:
Object reference not set to an instance of an object.
Description:
An unhandled exception occurred during the execution of the current web request. 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:
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Forms Data Controls :: Error : Object Reference Not Set To Instance Of The Object
Feb 3, 2010I am using C# and VS 2008 attached with access database, where Date1 is the PKey in Text defined.
I am getting the above error when i am trying to insert it into the access database.
here is my code
aspx :
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Code Behind :
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VS 2010 - Object Reference Not Set To Instance Of Object Error On Linkbutton Click
Nov 8, 2012I have 2 pages in my project (that are causing the problems). My default page has a FormView that for some reason will not let me access page events, such as buttons for instance, in code behind. They show up fine on page but are not visible in the page events drop down in code behind. We are using a work around for that.
The main issue now is that on my ViewTaxes.aspx page I need to get the values of some of the text boxes from the default page by Control Number, i.e. whatever record is being viewed on default page when you click the ViewTaxes link button, much more detailed information about that particular record is displayed on ViewTaxes. If on ViewTaxes I use a SELECT * statement I can access the ViewTaxes page when I click the button. We, of course, need to filter the data displayed by ControlNumber. When I add a WHERE clause to the DS on ViewTaxes page and click linkbutton on the default page I get an Object Reference error. This error seems to have something to do with a group of textboxes that are displayed via Session in codebehind. Values from default page being displayed in one section of ViewTaxes page. The error when thrown always points to Session("Owner1") = txtCust1.Text. If that code is removed then error will go to next Session variable, an so on.
I should also point out that both pages worked fine, no problems at all, using a test MySql table. We recently migrated the actual table that will be used from an Access database and replaced the test table. Can't find any spelling errors or anything of that nature. There are some Null fields in this database but it is set to allow Nulls.
Web Forms :: Object Reference Not Set To Instance Of Object Error Happen When Use 2 Linkbutton
Apr 27, 2016I have two datalist that bind from database and use linkbutton on these datalist
<asp:DataList ID="DLclass" runat="server">
<ItemTemplate>
<asp:LinkButton ID="Linkbtnclass" runat="server" CssClass="lbldasteM"
CommandArgument='<%# Eval("Name") %>' OnClick="Linkbtnclass_Click"><%# Eval("Name") %></asp:LinkButton>
<div id="MM31"></div>
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Here I want when click on linkbutton it change text's color so I wrote below code:
protected void c(object sender, EventArgs e)
{
this.GetCustomersPageWiseMC(1, (sender as LinkButton).CommandArgument);
BindDataListD(DLclassC, "classTI_documentry");
DataListItem item = (DataListItem)(sender as LinkButton).NamingContainer;
foreach (DataListItem dlItems in DLclass.Items)
[Code] ....
For Linkbtnclass_Click it worked correctly and when I click on linkbutton it change color but for LinkbtnclassC_Click when I click on linkbutton it make this error:
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 537: {
Line 538: LinkButton lb1 = dlItems1.FindControl("Linkbtnclass1") as LinkButton;
Line 539: lb1.ForeColor = ColorTranslator.FromHtml("#646464");
Line 540: }
Line 541:
Web Forms :: Reading Cookies - Object Reference Not Set To Instance Of Object Error
Aug 4, 2012I am using following code for remember me check box
protected void Page_Load(object sender, EventArgs e)Â {Â
if (!IsPostBack)Â {Â
if (Request.Cookies["username"].Value != null && Request.Cookies["password"].Value != null) {Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
txtuser.Text = Request.Cookies["username"].Value;Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
txtpwd.Attributes["value"] = Request.Cookies["password"].Value;Â Â Â Â Â Â Â Â Â Â Â
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When I execute the application first time
'Object reference not set to an instance of an object'
error occur..
How to check the cookies or exist or not in local machine?
Web Forms :: DropDownList FindByText - Object Reference Not Set To Instance Of Object Error
Jul 12, 2013In manager.aspx page I have gridview that bind product information from database in this gridview I define linkbutton EDIT that when users click on it they go to Edit.aspx page and in this page users can see their product information and Edit them
In Edit.aspx page I use some textbox and dropdownlist and bind them from database
int data1 = Convert.ToInt32(Request.QueryString["Id"].ToString());
SqlCommand _cmd = new SqlCommand("viewProduct", _cn);
_cmd.CommandType = CommandType.StoredProcedure;
_cmd.Parameters.AddWithValue("@id", data1);
_cn.Open();
SqlDataReader _dr = _cmd.ExecuteReader();
[Code] ....
When I click on EDIt linkbutton from gridview it go to Edit.aspx page and bind all data from database and ofcourse show data in Dropdownlist untill now every thing is ok
but when I change some Item in this page i.e Name of product when I changed and clicked on button to update table in database it update data in database but below error happen too
Server Error in '/behtop website' 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:Â
Line 79:
Line 80:
Line 81: DDL1.Items.FindByText(_dr["classification"].ToString()).Selected = true; Line 82: DDL2.Items.FindByText(_dr["subset"].ToString()).Selected = true;
Line 83:
And when I back to manager.aspx and again click on Edit linkbutton to Edit that product it didn't load Edit.asp page and above error happen again...
This error happen just when I want edit product information in other time if I don't edit any thing edit.aspx page load successfully...
Forms Data Controls :: Cannot Access Header Row Error / Object Reference Not Set To An Instance Of An Object
Jul 2, 2010I tried to get the heade row text with the following code, but it failed.
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Error returned was "Object reference not set to an instance of an object." on this line:
[Code]....