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by: Steve M |
last post by:
I have subclassed CollectionBase. I have also implemented GetEnumerator().
I have tried to set the DataSource of a DataGrid to an instance of my
subclass. However, the items in the grid are not obtained via the Enumerator
that I create in the GetEnumerator() method.
I have tried elplicitly implementing IEnumerable on my sublass as well.
Can anyone help on this? Thanks in advance.
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by: m. pollack |
last post by:
Hi all,
I'm still trying to get to the bottom of the problem I am
having with the CollectionBase class and the Object
Collection Editor.
Briefly put, I am exposing a strongly-typed collection
property, using a class derived from CollectionBase, to
the user via the PropertyGrid control's popup Collection
Editor. I need to know when the user has added or removed
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by: rein.petersen |
last post by:
Hi All,
Some of you may have encountered complications when trying to serialize
an object derived from CollectionBase (implementing ICollection or
IEnumerable).
Specifically, the XmlSerializer (as it is) won't allow you to treat an
ICollection (or IEnumerable) object as the root node without using
XmlAttributeOverides or sending in a new root attribute with the
serializer.
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by: Mike Pollett |
last post by:
Hi, I have used the ISerializable interface before and the code below worked
fine. Until I derived it from CollectionBase. The code will still serialize
and deserialize the properties in this class and properties derived from
this class but will not serialize or deserialize the properties in
CollectionBase. Like InnerList, which is a read only property of
CollectionBase.
How can I serialize and deserialize the InnerList property of...
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by: Eric Johannsen |
last post by:
I have a simple object that inherits from CollectionBase and overrides the
Count property:
namespace MyTest
{
public class CollTest : System.Collections.CollectionBase
{
public override int Count
{
get { return 0; }
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by: niyad |
last post by:
hi
On a form ive added my custom component (MyComponent) which has a property
(IDs in the expample code) exposing a collection of int16. I see this
property in the PropertyGrid and I dont have trouble adding items to the
collection at design time (using standard CollectionEditor class). I can
Add, remove items at design time, however all the items are lost after a
compilation.
public class MyComponent : Component{
Int16Collection...
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by: DelGator |
last post by:
Foundation...Accessing derived class members through a variable of
their base class is just a matter of casting the variable to the
derived class.
How would you access the derived class members in a collection of type
base class where the collection is derived from CollectionBase?
I know that I'm going to feel like a fool when this is resolved, but I
have racked my brain, and almost brought down the Google servers,
single-handedly,...
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by: Dennis |
last post by:
I am trying to set the default design proerties in a control I have derived
from the Panel Class. I thought I'd found how to do it from the MSDN but the
following line doesn't work:
Inherits System.Windows.Forms.Design.ControlDesigner
I get an error saying that the Type is not defined. I cut and pasted all
the imports and line from the MSDN.
Would appreciate any help.
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by: Samuel R. Neff |
last post by:
What's the advantage of inheriting from CollectionBase as opposed to
just implementing IList? It seems that it saves you from having to
implement a few properties (Clear, CopyTo, Count, GetEnumerator, and
RemoveAt) but the way it implements all the other things you need to
override seems overkill and counters the advantage of having an
extensible base class.
For example, the documentation example implementation of Remove:
Public...
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by: Marcus Müller |
last post by:
Hi,
I'm using classes with the ExpandableObjectConverter attibute in a
UserControl for properties. This works fine for some classes, and properties
of these classes can be edited during design time.
However, classes which are derived from CollectionBase don't save their
values in the form's code. Properties can be changed in the VStudio property
editor but they are not persistent:
// Property values are saved in the forms code.
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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