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by: Vaap |
last post by:
I am trying to get dataset working through IDbDataAdapter interface as
my solution need to work with Sql Server and Oracle ODP. I am using
different data provider factories and the code here only shows SQL
Server.
My code snippets are
// Build the interface in provider factory (_pf in code below)
public IDbDataAdapter CreateDataAdapter()
{
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by: DraguVaso |
last post by:
Hi,
Something I don't understand about a Typed DataSet: When a value in the
DataSet is DBNull, it throws this error: "Cannot get value because it is
DBNull".
But aren't Typed DataSets invented to make life easier, to be able to get to
tge Tables and Values with less code, in less time? But with this thing you
need to add a Try-Catch around every statement when using the value, add for
each value a default value in your DataSet (and...
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by: Kiran |
last post by:
Hi,
I am using typed dataset for Employees Table and found a problem, can anyone tell me what's wrong
Case 1:
Employees Table:
ID: int,Not Null,Idendity, Primary col
Name:varchar(20),Not Null
Type: Varchar(5), Null(Allowed)
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by: Li Weng |
last post by:
Hi,
I just installed Visual Studio 2005.
In VS 2003, if a field's NullValue in a data table is set to -1, I can
assign it -1 in code as NULL value.
But in VS 2005, look like the data table doesn't take -1 as NULL value
although property NullValue = -1. it takes it as a normal value and check
table relationship to see if it's in primary key table.
I saw in 2005 property DefaultValue is set to <DBNull>. I don't care this
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by: Mateusz [PEYN] Adamus |
last post by:
Hi
I have a Typed DataSet.
I've databinded it to some text controls on my form, controls show data
when I show record.
But now I would like to create a new record with this form, controls and
dataset. A add new row to dataset:
<C#>
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by: Bob |
last post by:
Hi,
I have a typed unbound dataset that is passed to a datahandling class to be
filled.
The datahandling class fills it from a sproc using an oledbDataAdapter
(SQLAnywhere database)
The only table in the dataset has two int32 columns.
There is one row of data and as expected, column 0 contains an int and
column 1 contains a null.
I want to update column1.
The following code executes but the row cell remains unchanged.
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by: John |
last post by:
Hi,
I am developing a windows app using C# 2005. This app uses SQL Server or
Oracle database depending on the what the user is using.
Can I create one typed dataset and use it for SQL Server and Oracle?
Probably not.
How can I structure my data access layer so the app will be switching easily
between those two databases with a locally stored db connection string? How
about the following? Thanks for your suggestions.
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by: =?Utf-8?B?UlBhcmtlcg==?= |
last post by:
I used the wizard to generate a typed dataset for my table and let it create
my SPROCs. It created everything, and the GetData() method and the custom
GetByUserName query works great, but when I try to call the Update() method
of my TableAdapter, I get the following:
"Procedure 'stp_SecurityUsers_Update' expects parameter '@userName', which
was not supplied."
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by: =?Utf-8?B?UGFvbG8=?= |
last post by:
Using a typed Dataset.
From debugging I can see that each dataset.<tableis filled with the
correct data (see ###)
cmbxPayee DisplayMember, ValueMember and DataSource each show the expected
values (see <---)
cmbxCategory DisplayMember and ValueMember show expected values but
DataSource shows null (see ***)
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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...
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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: 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,...
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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: 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: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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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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