| |
by: John Wood |
last post by:
I was just looking at an article about using nullable value types. (value
types that can effectively have no value and not be set).
The syntax is to append a question-mark to the value type in the
declaration, eg:
int? age;
I don't like that much, I think it would be much more consistent to use a
new keyword, such as "nullable". But anyways...
|
by: Steven Livingstone |
last post by:
Bit of advice here folks.
I am creating a default constructor that just initializes a new instance of
my object and a secon constructor that takes an ID and loads an object with
data from the database for the given ID. I could just leave two separate
constructors, or i could just have the default one call the second with a
"-1" as the ID. This means that the initialization of certain fields can be
based on whether my ID is -1 (for lazy...
|
by: GG |
last post by:
I am trying to add a nullable datetime column to a datatable fails. I am
getting exception
DataSet does not support System.Nullable<>.
None of these works
dtSearchFromData.Columns.Add( new DataColumn( "StartDate",
typeof( DateTime? ) ) );
dtSearchFromData.Columns.Add( new DataColumn( "EndDate",
typeof( System.Nullable<DateTime>) ) );
Any ideas?
|
by: Niall |
last post by:
I'm experience problems very similar to those reported in this thread on
dotnet.framework on May 16 at
(http://groups.google.com/group/microsoft.public.dotnet.framework/browse_thread/thread/c1dd4f0a021a0e71/1ae86cd754c7b7d2?lnk=st&q=&rnum=3&hl=en&utoken=2KAcT0QAAACAT_kPml7nPanGq5_khmjXM3lTuJUrpchkk4PfyJ8QBJNg0tGVFuqI3uPOVaXa-mNYEzHwTZsVie9Lz8ynrMUKZDW0biiNx_26ZoVcD0w9aA).
Steven Cheng from MS was involved in the discussion, but it didn't seem...
|
by: Nick Gilbert |
last post by:
Hi,
I have a database table which has some "float" columns which allow
nulls. I have created a TableAdapter to view this table.
If I open the TableAdapter and there are null values for some of the
float columns then an exception is thrown:
Line 2136: try {
Line 2137: return
|
| |
by: Sam Kong |
last post by:
Hello,
I want to define a generic class which should accept only nullable
types or reference types.
What's the best way to costrain it?
---------
class MyClass<T>{
...
|
by: MobileBoy36 |
last post by:
Hi all,
Nullable types were announced as new handy stuff in .NET 2.0
But it seems like the datareader doesn't support nullable types.
You have still to check for "IsDbNull".
So, are Nullable Types useful at this moment? Do you get any benefit using
them (at this moment)?
Is Microsoft going to change this?
Best regards,
|
by: =?Utf-8?B?R3JlZw==?= |
last post by:
When using the VS Wizards to create a DataSet I select tables. Then, I use
the TableAdapter Configuration Wizard to modify the underlying queries that
retreive the data. What I'm wonder is, does this TableAdapter work in the
same manner as a SQL Server Stored Procedure or View? Or, does it work like
MS Access where it pulls all the data over and then filters it?
Or, should I be making my data sources for the TableAdapters stored...
|
by: Tony Johansson |
last post by:
Hello!
Jon skeet answer this question in a previous mail for several days ago if
nullable type is a reference or a value type?
With the following answer.
It's a struct - otherwise there'd be relatively little value in having
it instead of having explicit access to the boxed types.
But what does the answer actually mean?
|
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, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
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 effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
|
| |
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 tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
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 Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
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();...
|
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...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
|
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
|
| |
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...
|
