473,409 Members | 1,983 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,409 software developers and data experts.

Which method can I override in List<T> to validate inserts?

Hi!
I am looking for a simple way to validate members in my own System.Collections.Generic.List<>
derived class?

In CollectionBase, I can override OnValidate - is there a similar functionality
in List<>?

Regards

Niels Harremoës
Apr 20 '07 #1
1 1373
Hello,

no, you can't. List<Thas no overideable methods for performance reasons.

Best regards,
Henning Krause

"Niels Ull" <ni******@hotmail.comwrote in message
news:97*************************@msnews.microsoft. com...
Hi!
I am looking for a simple way to validate members in my own
System.Collections.Generic.List<derived class?

In CollectionBase, I can override OnValidate - is there a similar
functionality in List<>?

Regards

Niels Harremoës

Apr 20 '07 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

14
by: Dave | last post by:
Hello all, After perusing the Standard, I believe it is true to say that once you insert an element into a std::list<>, its location in memory never changes. This makes a std::list<> ideal for...
4
by: matty.hall | last post by:
I have two classes: a base class (BaseClass) and a class deriving from it (DerivedClass). I have a List<DerivedClass> that for various reasons needs to be of that type, and not a List<BaseClass>....
3
by: Eric | last post by:
I have a string representation of an object. I create an object of that type through reflection. I would like to create a List<> of those objects. I obviously can't do List<myObject.GetType()>...
5
by: PJ | last post by:
I have a class definition : public class PagingList<T> : List<T> { private int pageSize, pageNumber; public PagingList() { pageSize = (this.Count == 0) ? 1 : this.Count;...
4
by: =?Utf-8?B?TGFycnlS?= | last post by:
I need some help with a multilevel sorting problem with the List<>. I have a List<ItemToSort( see below ) that needs to be sorted in the following manner: Sort by Level1Id ( ok that was the easy...
0
by: Iron Moped | last post by:
I'm airing frustration here, but why does LinkedList<not support the same sort and search methods as List<>? I want a container that does not support random access, allows forward and reverse...
7
by: Andrew Robinson | last post by:
I have a method that needs to return either a Dictionary<k,vor a List<v> depending on input parameters and options to the method. 1. Is there any way to convert from a dictionary to a list...
56
by: Zytan | last post by:
Obviously you can't just use a simple for loop, since you may skip over elements. You could modify the loop counter each time an element is deleted. But, the loop ending condition must be...
45
by: Zytan | last post by:
This returns the following error: "Cannot modify the return value of 'System.Collections.Generic.List<MyStruct>.this' because it is not a variable" and I have no idea why! Do lists return copies...
35
by: Lee Crabtree | last post by:
This seems inconsistent and more than a little bizarre. Array.Clear sets all elements of the array to their default values (0, null, whatever), whereas List<>.Clear removes all items from the...
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
0
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
0
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
0
Oralloy
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,...
0
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
0
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
0
isladogs
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...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.