On DBML I have two entities as Parent, Child. I am trying to assign Child class properites in a Parent.
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I am getting the following Error:
Cannot access a disposed object.
Object name: 'DataContext accessed after Dispose.'.
i am currently working on an asp.net mvc 2 web app using LinqToSQL. I would like to handle a scenario where a user comes form a country and for this i have set the users - countries db relationship and in my user model i have a CountryId property.
I would like to display the country name on my users display view, so i tried fetching the country name like this: User.Country.Name, but an exception occurs that i cannot access a disposed object. I understand that this is caused by the way i handle my users repository and service.
This the repository users code:
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This is the service users code (the repository is not class level property, but a local one that gets dipsosed immediately after calling it):
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So, how could i handle such a scenario, where i would like the Country model to be also fetched in order to use it later? Should i convert the repository model a class level proprty in order not to get disposed?
I 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:
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i'm having trouble because when it has no return value i get the error
Object reference not set to an instance of an object.
im using a sqldatasource and i want it to query a table chosen from a dropdownlist, so i wrote the following in the .cs file
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im recieving this error msg: Object reference not set to an instance of an object (pointing to the line containing the select command)
i don't know what's the problem, i tired a hard-coded statement and it worked fine!
I have Parent(order)and child(Orderdetail) object how to insert through dataadapter.Update() method in single shot.
View 1 RepliesI have a parent & child table.
Parent - User
UserID
UserName
Status
1
Shallin [code]...
I also have parent & child object class.I would like to use 1 C# function and 1 SP to handle the retrieve portion but I have 1 problem.I'm not sure how to assign the value from Reader to the object.I do something like this but I only get 1 country which is the last country.
if (dr.HasRows)
{
while (dr.Read()) [code]....
how to handle this Parent/ child object with only 1 function and 1 SP?
I have developed a website that allows users to upload office documents then uses the office object model to convert the document to an HTML file that it then displays in an iFrame. I have, of course, included references to Office.interop.word, and the site works fine on my development machine. When I uploaded it to my production server the site functions fine until I try to upload a document. I initially got a similar error that said "COM object not registered". I realized that Word wasn't installed on my production server. So I installed word and now when the server tries to access the word object model I receive the following error:
Retrieving the COM class factory for component with CLSID {000209FF-0000-0000-C000-000000000046} failed due to the following error: 80070005 Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))
I searched the registry for the corresponding CLSID and found a corresponding folder. I added full control to the IUSR_ account and due to the persistence of the error I eventually added full control to "everyone" and ensured these permissions inherited down to the rest of the folder. I then added full control to IUSR_ and again eventually added full control to "everyone" to my microsoft office folder. I don't know what other permissions to grant and where in order to make this "Access is denied" error go away. I must be granting them in the wrong place, because as far as I know I can't be any more permissive than "Everyone" "Full Control".
I have an Employee object. One of the fields of the employee object is Address object -- please see example:
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I'm now trying to display employee information in a GridView but not sure about how to access the individual fields of the address object. I tried this but didn't work...
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I'm getting the old "Object reference not set to an instance of an object" error on this code:
nonqueryCommand.Parameters.Add("@comment", SqlDbType.VarChar, 500)
nonqueryCommand.Parameters("@comment").Value = CType(FormView1.Row.FindControl("CommentsLabel"), TextBox).Text
"CommentsLabel" is a textbox, despite it's name (and I've tried the CTYPE ot Label too).
i have create dynamic menu control , i have master page and login page , once the user login , i want to show the dynamic menu in my master page. below i try to call masterpage control in my child page ,but i throughs the error
Object reference not set to an instance of an object.
my master page code
public partial class MasterPage : System.Web.UI.MasterPage
{
protected void Page_Load(object sender, EventArgs e)
{
}
public string MyProperty
{
set
{
// lblUser.Text = value;
lblUser.Text = value; // here i got the error
}
}
}
My child page code
protected void btnwork_Click(object sender, EventArgs e)
{
((MasterPage)this.Master).MyProperty = "Text changed from Sub Page";
}
This was a pretty disappointing moment - when databinding, using Eval("Contact.LastName") would work. It nicely evaluates the related Linq object's member LastName. If the "Contact" object is null, no error is thrown... instead the field is simply null.
However, the same does not hold for sorting - if there exists a null entry (this object does not have a Contact) then the LinqDataSource throws a NullReferenceException. This means that, if you ever have nulls on your foreign-key objects, you can't use sorting headers in the ListView.
This makes the feature moderately useless - I have to roll my own properties for every single field I'd ever want to sort on. That's insane.
My web method returns object 'User' that has a lot of properties.
In my 'OnComplete' function I am receiving those object.
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Question: How can I get values of object properties?
The code above provides me with '[object Object]' text instead of real object value.
I got this error "object reference not set to an instance of an object" when i want to display the values of dynamic generated drop down lists by pressing a button to show the values in Listitem.
i have master page in which i use :
1)ScriptManger
2)UpdatePanel
3) treeview menu
Server side Code is:
[code]
I've posted the same question in the Object Data Source forum. This is a link to it http://forums.asp.net/t/1554083.aspx. Maybe I should've posted here to begin with. There seemed to be some overlap so I wasn't sure which was the best on to post the question in.
I'm trying to get a better understanding of how I could've designed my app so that the Object Data Source could work with the properties of my business objects. Please read the other post to see how it's currently being done. Sorry for the link to the other page. I didn't want to post a bunch of duplicate information. I would love to get some suggestions for alternative ways of doing this.
I am receiving Object reference not set to an instance of an Object when binding Child dataGrid in the ItemCommandEvent of Parent dataGrid.
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I'm working on ASP.NET app and in the master page C# code I want to access the login control, so I have the following code:
Login login = new Login();
login = this.Master.FindControl("login") as Login;
But, I get exception "Object reference not set to an instance of an object" when this line
login = this.Master.FindControl("login") as Login;
is executed. I can't see what can be wrong...
I have a bunch of methods like so in my DAL in VS 2010. When I run the "new" Code Analysis option i get the message - Warning CA2000 object 'comm' is not disposed along all exception paths. Call System.IDisposable.Dispose on object 'comm' before all references to it are out of scope.
I understand I could use another using statement for the SQLCommand however if prefer to do it like I have with the Try/Finally block. My understanding is the Finally block executes last and does the cleanup.
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Is it possible to either access the properties, such as 'url', of a embedded media player object server side to change them? Or possibly dynamically create a new media player object with a different 'url' each time?
I am trying to change the property based off of a selectedindexchanging event of a gridview object.
why I get this error:
Object reference not set to an instance of an object.
when I try to access a LinkButton inside a Repeater as follows:
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I am using an ObjectDataSource control to call a MapInfo object. This object has two properties:
public IList Visits
public int TotalAvailable
The select method returns an IList but the TotalAvailable property is also populated. I have set the TypeName in the ObjectDataSource to the MapInfo object but because the Select method only returns the IList I don't have access to the TotalAvailable.
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Is there any way to access this value. I know it is being populated in the MapInfo object but all that gets returned from the Select method is the IList
I have a couple methods to handle the saving of an image using Request.InputStream. I have two extensions that share the HttpContext. In one of my methods, I'm using a BinaryReader to read in the contents and do the processing. However, naturally, when disposing the BinaryReader, it closes off the InputStream property on Request. My SECOND method uses the same input stream to create a thumbnail.
Bascially, I need a way to keep the Request.InputStream property alive after disposing the reader in the first method. Is this possible? Here are my two methods. SaveImageStream() is called first, then GenerateThumbnail().
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I am storing a custom "Organisation" object as a session variable. One of the properties of the Organisation object is "OrganisationID" (integer). I have a DataSource that requires a parameter value to run, and I want to use a SessionParameter to populate this. In a previous version, I stored the OrganisationID directly as a session variable. In that case, I could easily access it like this:
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However, how do I now access the OrganisationID property of an "Organisation" type session variable (called "Organisation")? I have tried this, which does not seem to work: <asp:SessionParameter Name="OrganisationID" SessionField="Organisation.OrganisationID" Type="Int32" />
im tryin to create a login form.
and am receiving the following error:
Object reference not set to an instance of an object
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and heres my aspx page:
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Stored procedure:
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I 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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