C# - Edit A Collection In DesignMode?
Jun 27, 2011
What is the easiest way to edit and persist a collection like decimal[] or List<string> in the WinForms designer?
The first problem is that a parameterless constructor is needed. So I made a simple wrapper class: (at some point this was like MyObject<T>, but the WinForms designercode generator didn't know how to handle it)
[Serializable()]
public class MyObject
{
[Code].....
However, by saving, closing and re-opening the form the elements in the collection are never persisted.
Edit: Hans gave me some tips (his comments somehow went into the void). I followed his guidelines and updated the source above, which unfortunately still doesn't work...
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Sep 7, 2011
I have the following classes:
Product, Service and OrderItem
Product and Service must inherit OrderItem. So basically I want to store OrderItem object in my shopping cart and these object are store in a list.
Public MustInherit Class OrderItem
Private m_enuItemType As TypeOfItem = TypeOfItem.None
Private m_strUserID As Integer[code].....
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Mar 11, 2012
I'm tried to make a control that will kill itself when added to a form. Actually what I want to do is make a control that will ask for password before added to a form, and remove itself if the password is wrong... Anything work great, it really will remove itself from the parent form, but it will show a error message too: "'child' is not a child control of this parent."
Here the code:
Public Class SuicideCustomButton
Inherits Button
Protected Overrides Sub InitLayout()
[Code].....
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Mar 10, 2012
I'm tried to make a control that will kill itself when added to a form.Actually what I want to do is make a control that will ask for password before added to a form, and remove itself if the password is wrong...
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Jan 15, 2009
Whenever I want to reopen a project that I didn't worked on for several month and want to view my form in design mode I receive following error.
Warning1Method not found: 'Void System.Windows.Forms.Design.ParentControlDesigner.WndProc(System.Windows.Forms.Message ByRef)'.00
[Code]....
I used this project in VB2005 express, but also in VB2008.
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Jan 15, 2010
Is it good practice to store sub-collections of item X inside a parent collection of item X for caching 'filter-queries' which are performed on the parent collection? (They won't be used together (as in color AND type).) Or is it also ok to just Loop over the collection and return the correct entities in a temporary collection?
[Code]...
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Apr 28, 2010
I have a form that adds new contacts. New contacts are added by pressing an appropriate button and they appear as an entry in the list on the form. I try now to add an edit button that will edit existing entries.User will select a given entry on the list and press edit button and will be presented with an appropriate form (AddContFrm).Right now it simply adds another entry with the same title. Logic is handled in a class called Contact.vb Here is my code.
Public Class Contact
Public Contact As String
Public Title As String[code]....
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Feb 8, 2010
I have been researching for a couple of days now and to no avail. Does Anyone know how to make a custom collection that take advantage of the collection editor? I would like to be able to have 3 Color Values, 1 Boolean and 1 String.
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Jul 25, 2011
I'm trying to support Basic.NET on my framework so I'm trying to convert C# 4 code to Basic.NET 10. Microsoft is committed to "co-evolve" these two but I'm having a problem with collection initialization... I found that I can initialize a collection much like in C#:
[Code]...
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Apr 15, 2009
I've got the following ADO.NET Entity Framework Entity Data Model:I want to find all the Policyholders with both a Service of a given Id and also a Keyword of a given Status.
This LINQ Does Not Work:
Dim ServicesId As Integer = ...
Dim KeywordStatus As Integer = ...
Dim FoundPolicyholders = From p As Policyholder In db.PolicyholderSet.Include("Keywords").Include("Services") _
Where p.Services.Id = ServicesId _
And p.Keywords.Status = KeywordStatus _
Select p
The Where clause cannot search the p.Services and p.Keywords EntityCollections in that way.
[Code]...
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Apr 6, 2012
currently in my application I have a Global Collection that is a Collection of Collections.Currently I am trying to add items/ elements to one of the child collections of the Global Collection but I am unable to use the collections methods of the child.When I assign a variable to the child collection and return the collection it is just an object with the collection inside.
Ex:
Dim GlobalCollection as New Collection
Dim ChildCollection1 as New Collection
Dim tempCurrentCollection[code]......
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Dec 17, 2009
I've been working with a CMS called InsiteCreations 2008. I'm running into an error I just can't wrap my head around. I would even be willing to compensate anyone a small amount over paypal, for a solution. The error is rare in occurance, and appears when clicking about 3-4% of links to other pages within our CMS.The full code page is quite large, but there seems to be only one function associated with the error. The error also only appears when not logged into the CMS. If logged into the CMS, clicking the link simply displays the page as normal. I have already checked permissions on the page from the CMS admin console, and it is public.
The error message is as follows:
Server Error in '/' Application.Collection index must be in the range 1 to the size of the collection.
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.
[code]....
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Apr 15, 2011
search the collection of a collection in my LINQ Where clause?
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Apr 14, 2011
Take the following scenario:
Public Class Store
Public Overridable Property Areas As List(Of Area)
End Class
Public Class Area
[code]....
What's the quickest way to get a total count of shelves for a store? I.e. for a store I get the total count of areas by using Areas.Count Or will I need to loop through each area and tally the count of shelves?
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Mar 25, 2011
I have an ASP.NET app with lots of textboxes all over the page that need updating at various points through program execution. These textboxes actually belong to a certain class, so for easy updating I thought I could create a Dictionary(Of string, object) and add the control.ID and the control to it and then for updating do something like this:
[Code]...
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Jun 26, 2012
I need to convert a VB Collection to a modern one, like Dictionary or Hashtable. For my approach, I need the Collection's KEYS. Googling tells me that it's impossible. Re-writing the entire application using new collections is not an option as the application is really old and large (converted from VB6 to VB.Net).Using the old Collection also is not good - as there are new components in development.Converting a - for example - Hashtable to Collection works:
using VBCollection = Microsoft.VisualBasic.Collection;
public static VBCollection ToVBCollection(this Hashtable table)
{
[code]....
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Aug 12, 2009
I have a collection of lines and as i loop through through the collection, i need to see if it aleady contains a certain line; however, the contains method wants a string and i have stored lines, so how can i use this method to see if my line is already in the collection so i don't place it in there twice?
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Aug 4, 2011
Is it possible to print to a collection(), then prompt to print the collection?
[Code]....
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Jun 20, 2012
I am not able to edit the second row. No problem with the first line.Error: Column 'PID' is constrained to be unique. Value '2' is already present.[code]
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May 5, 2009
i can't edit my vb files. after having opened visual studio 2008, i open a project with the solution file. i can see, in the solution explorer window, my vb file. but if i double-click the vb file, i have the following error; there is no editor available for form1.vb. make sure the application for the file type (.vb) is installed. i have re-installed visual studio and still got the error. someone knows how to fix this?
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Dec 12, 2009
i want to EDIT an existing .txt file, but i dont want remove the lines above the new lines, i wish do it, on visual basic. how can i do it?
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Jun 11, 2011
What I am trying to do is be able to remove a handler, add a handler, and a button and add a string to the my.settings. I would like the DLL to be able to do all of this to my form1 in a different project. How my program is setup right now is by the information inside this tutorial. You will be able to find my source code below but it is just a test code that I am using for right now to add to my main project later on. What the program does so far is checks for add-dons (DLL's) and will execute the function Addonloaded inside the DLL. My final goal is to have it so that nothing will be stored inside the program for the add-on's, so that I can easily make add-on's and the users can just add the DLL to their addons folder.[code]...
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Apr 22, 2012
trying to edit an xml file in vb, i try-ed to find answer around but those did not worked as expected, what i'm trying to achieve is that for those transport_orders that have negative , replace the negative value with its positive.Keep in mind that the values is a number with 2 decimals and it's positive shouls remain in the same format.
Source xml looks like this:
<transport_orders>
<transport_order>
<id>NOCCO/12-006798_1</id>
[Code].....
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Nov 16, 2009
I have a xml document that i want to edit, for example true texboxes, any other way would also be welcome :))
[Code]...
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Oct 13, 2009
how to edit gpedit.msc in visual basic
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Mar 19, 2012
I need to edit image in asp.net. just functionality like ms paint color brushes. how can i get this using system.drawing namespace on web form.
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Apr 17, 2009
Well here's a strange one.I have a DataGridView linked to a List (of Object) dataset..
Code:
Private Villages As List(Of VillageDisplay)
Private Sub LoadVillagedata(ByVal VendorID As Integer)
Villages = DataMethods.GetObj(VendorID)
DGVVill.DataSource = Villages
[Code]...
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Sep 29, 2009
i have a radgridview to display come records.when i'v stored some information in database ,i've made a mistake.how can i edit that mistake without opening database?
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Sep 17, 2009
I have a problem to edit some xml file.this my xml file[code]...
all i want to do is only add some tag and information like that.
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Aug 1, 2009
i found some code that only allow me to edit the first row of the listview only. it does not allow to edit other row and column. can some1 teach me, how to change the code to make it more edit able where ever i want to edit.
Private Sub ListView1_DoubleClick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListView1.DoubleClick
If Windows.Forms.MouseButtons.Left Then
[Code].....
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