I am using the Entity Framework with POCO's generated using the T4 Templates. I have the generated classes in a separate assembly. Ok, so a very simple example: I have a Category entity in the model which has SubCategories (1-Many with SubCategory). When I use the following code, I get The ObjectContext instance has been disposed and can no longer be used for operations that require a connection. [Code]
I know generally it is not the best solution for a child to handle an event of parent. Take this for example; Mainform loads UserControlOne, UserControlOne handles all UserControlOne needs to. How ever we need a MenuStrip/ToolStrip. MainForm does not need to know much about what UserControlOne is doing. Other then receive some information on a statusbar. Right now events are controlling this.
The menustrip/toolstrip need to be able to speak to UserControlOne, for example when buttons are clicked on the strips. Would you; Allow the child to add a handler to capture the parents event? Move the MenuStrip/ToolStrip/StatusStrip all to UserControlOne so we can ignore all this event hassle? My Major concern with this is now we have taken all the head ache away from MainForm and crushed it into UserControlOne. Any suggestions?
I have a Dialog which I'm calling via Loading.Show()Can I lock the position and location to the parent form? In such a way so if the parent is minimised or moved, the child will stay centred to the parent?
I was using ShowDialog() but this obviously stops the parent from being accessible. This is being used to display a progress gif. (Child is 50% opacity)
public class CategoryRepository: RepositoryBase<Category>, ICategoryRepository { public CategoryRepository(IDatabaseFactory databaseFactory) : base(databaseFactory)
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Does anyone has an idea what i should change to let it work and let my UserRepository use the methods in RepositoryBase while implementing the IUserRepository?
Is there any way to use a LINQ to XML to query an XML document like the one below to create new (anonymous or strongly typed) objects from the child elements of a descendant? Here is my XML document:
I have a List of a custom class (barData) that I need to remove elements form based on a date.
The bardata class holds data of stock price information.[cod]e...
Is there a way to do it without looping through each bar as I may have 2000 plus bars for each stock and may have 2000+ plus stocks to look at. It can be done by looping but it is slow.
I have got an xml document which looks something like this.
<Root> <Info> </Info> <Info>
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How can i write a linqToXML query so that it returns me an IEnumerable containing each child element, in this case all five child elements of , so that i could iterate over them. The order of child elements is not definite, neither is number of times the may appear.
If I have code like this (C# or VB.Net does not matter)
Dim e As IEnumerable(Of XElement) = _ From s In _dataSourceSettings.Elements _ Where s.Attribute("name").Value = toInsert.Attribute("name").Value If e.Count > 0 Then e.Remove() End If
How do I get now new _dataSourceSettings without element that I removed?
How to remove the Nothing elements from an array using a For or For Each loop? I have to display the array to a datagrid, but the Nothing elements of the shows up as zeros. This is the code I have so far for my button click event:
Dim flag As Boolean = False Dim found As Integer For m As Integer = 0 To carArray.Length - 1 If carArray(m).carid = txtDelete.Text Then carArray(m) = Nothing flag = True found = m End If Next
I use the removeRange function to remove a couple elements from a list, but the Count of the list seems to be intact, so I assume it didn't work the way I expected it too.... so, how do you remove elements? I mean, reduce the list's Count value ultimately.
There seems to be no documentation on the codeplex page and for some reason intellisense doesn't show me available methods or anything at all for htmlagilitypack (for example when I type MyHtmlDocument.DocumentNode. - there is no intellisense to tell me what I can do next)
I need to know how to remove ALL < a > tags and their content from the body of the HTML document I cannot just use Node.InnerText on the Body because that still returns content from A tags.[code]...
I'm using the following flavor of threading to create n number of worker threads. These threads all have a bit of latency as they interrogate devices that have strict temporal/physical limits.
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I'm looking for a pattern that will let me start the worker threads then wait patiently for completion. Sounds simple ("Just raise an event!") but there seem to be timing landmines. Since the completion EventHandler is single threaded, collisions can occur that destroy the EventHandler data.
Is there a straight forward way for 1 of n threads to report an "I'm done" condition?I've literally got lists of these for c++ but vb.net/CLR is giving me brain freeze.
having difficulty with understanding object lifetime / instantiation.I have a windows from with a datagridview and a panel. The datagridview has a checkbox column and a list of names which is populated from a database.The panel has a few text boxes (e.g. name, age, favourite sports team) and a 'save changes' button.
The idea is that when the user selects a person in the datagridview by checking the appropriate checkbox then the panel shows the relevant data for that person (name, age, fav sports team) by pulling the data from a database. If the user would like to update the person's details they can do so by typing in the textboxes and then clicking the 'save changes' button. All quite simple so far.
The way I have designed this is to have a 'panel' class and to create an instance when the user checks a checkbox.(NB - the reason I have created a 'panel' class is that I intend to replicate the datagridview and panel on other tabpages within my form and thought it would be useful to have a generic 'panel' class that I could re-use.)
My code looks a bit like this:
If CheckBoxClicked Then Dim UpdatePanel As New UpdatePanel(MyForm.NameTextBox, MyForm.AgeTextBox, MyForm.FavSportTeamTextBox, MyForm.SaveButton) UpdatePanel.GetData() ...
When the user clicks the SaveButton the data is updated to the database and I have a display message (simple textbox) which says "Update successful" and displays for 5 seconds before hiding itself.
Here is the problem:Suppose a user checks a checkbox, reviews the data and does not make any changes, and then checks another checkbox and decides to update the data by clicking the 'save changes' button. What happens is that the "Update successful" message is displayed twice.
I think this is because every time the user checks a checkbox an instance of UpdatePanel is created. If a I select five different people using the checkboxes and then hit 'save changes' I get five "Update successful" messages.
I am not sure how to overcome this. It feels like each time a checkbox is clicked I need to check if an instance of UpdatePanel exists and then destroy it. I tried using UpdatePanel = Nothing and also investigated IDisposable and GC.Collect() but with no luck.
I managed encrypting an xml document by encrypting an element and then replacing the element with the encrypted data. A shown in the sample code below. Public Shared Sub Encrypt(ByVal textReader As TextReader, ByVal textWriter As TextWriter, ByVal certificateName As String)
For my first post I've got a tricky question. I'm past walking through tutorials but not far enough to join the Open Source Community.this Question I'm trying to create a program that tracks combinations used in Alchemy Games (Generally on a mobile phone etc)I've got the following classes
Class Game contains properties for Elements and Combinations Class Elements Inherits List(Of Element) Class Combinations Inherits List(Of Combination) Class Element Class Combination
Combination contains Element 1 and Element 2 and List(Of Element) for the results My Question: Using Game.Elements how can I add a readonly property for combinations of that element.
I have an MDI container and many child forms Most child forms are maximized. how to remove the caption bar,control box, minimize, restore/maximise and close buttons. I can stop some of them from working but not all, so ideally I would like it gone.
I have a simple Treeview with 1 rootnode and several childs I'm allowing users to add a Group (in the rootnode) in which they can drag and drop other childs. But how can I remove a 'Group' without loosing its childs? If I do a remove it also removes its childs.
I have an aspx page with three web controls: one to control the List Users page, one to control the Edit Users page, and one to control the Add User page. I have discovered a method for accessing these elements, but it seems to be limited. Here is what I have done:
Protected Sub editUser(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewEditEventArgs) 'set selected user from gridview.
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This works in most cases. However, I am unable to access the "enabled" attribute of these web controls. Why is this, and how might I access that attribute?
i have set selection mode to multiExtended in vb.netSo i am able to select multiple elements but how to access those selected values/indices using SelectedItems property?
I need to read an xml document from a database record into an XDocument object in order for it to be deserialized. So that the deserialization will work, I need to apply a specific namespace to each of the level 1 elements. So XML looks a bit like this:
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How do I prevent the blank/empty namespace being added to each child element of the element to which the required namespace has been applied?
My application having one mdiform in that form six child forms are there.Switching of one form into anather form blue bar is appearing form at the title of every opened child form.These six child forms are opens in mdiform.how to remove the blue bars are appearing from every opened child form in mdiform.how to remove these blue bar. I have tested this "NewMDIChild.Location = New Point(x,y)".but blue bars are not remove in the opening of mdichild form into mdiform. This bars are appearing in the opening condition of mdichild form after clicking any button in the mdiform.
