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by: JDR |
last post by:
I am trying to implement an abstract query factory in .NET. My solution uses a Factory that creates a concrete command class using reflection and caches an instance of it in a HashTable. Each concrete command class uses the Data Access Application block SQLHelper to execute queries and return a typed dataset. The Factory then caches the DataSet using the Caching Application Block implementation of an in Memory cache. To call a query then,...
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by: |
last post by:
Vorrei capire se e quando, con un DataGrid ed un DataSet, è meglio
utilizzare il DataAdapter e quando i comandi diretti
myCommand.ExecuteNonQuery();
Ho capito che il DataAdapter consente di effettuare operazioni direttametne
sul DataSet e sul DataGrid, e di aggiornare la Tabelle del DataBase solo
quando necessario (utilizzando appunto il DataAdapter.Update(DataSet);)
Mentre il command viene eseguito immediatamente con il comando...
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by: |
last post by:
Vorrei capire se e quando, con un DataGrid ed un DataSet, è meglio
utilizzare il DataAdapter e quando i comandi diretti
myCommand.ExecuteNonQuery();
Ho capito che il DataAdapter consente di effettuare operazioni direttametne
sul DataSet e sul DataGrid, e di aggiornare la Tabelle del DataBase solo
quando necessario (utilizzando appunto il DataAdapter.Update(DataSet);)
Mentre il command viene eseguito immediatamente con il comando...
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by: TJ Doherty |
last post by:
Need help understanding the following please:
When I am creating a project and code my connection using Dim connectString
As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & "Data
Source=C:\Temp\NW-test.MDB", everything works correctly when I run the
project.
However, if I set up the exact same connection using the DataAdapter wizard
and try to run the project, I get a "Microsoft Jet database engine cannot
open the file..." error.
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by: Tom Luetz II |
last post by:
I'm having some trouble with the DataAdapter in my code. When the parameter
in an OleDbCommand, which is created
as having a type of OleDbType.Decimal, is set to System.DbNull, the actual
value posted to the database upon execution of the Insert command is a
floating point value of zero (0.0, actually).
The DataAdapter is associated with a DataGrid. When a row is inserted into
the grid, the column may contain either nothing "(null)"
or...
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by: Franklin M. Gauer III |
last post by:
I create a simple DATAADAPTER in a webservice project. It creates the
UPDATE, INSERT, DELETE commands for me - no problem.
In vS2005 it creates these commands as RESOURCES in the RESX file (i.e.
strings). The problem is whenever I try to test the webservice I get:
System.Resources.MissingManifestResourceException: Could not find any
resources appropriate for the specified culture or the neutral culture. Make
sure...
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by: Franklin M. Gauer III |
last post by:
In VS2003 I used to be able to drag a SQL Server table from Server Explorer
onto my webservice (in design mode) and it would automatically create a
DataAdapter for me. This doesn't work in VS2005 anymore (crap) - is this by
design? Does anyone know?
Now if you create a DataAdapter in VS2005 (on a webservice project) it
generates the SQL statements and puts them in a .RESX file (i.e. the UPDATE
and INSERT SQL command text). Then the...
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by: Franklin M. Gauer III |
last post by:
I create a simple DATAADAPTER in a webservice project. It creates the
UPDATE, INSERT, DELETE commands for me - no problem.
In vS2005 it creates these commands as RESOURCES in the RESX file (i.e.
strings). The problem is whenever I try to test the webservice I get:
System.Resources.MissingManifestResourceException: Could not find any
resources appropriate for the specified culture or the neutral culture. Make
sure...
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by: Rich |
last post by:
What is the diffeence bewtween a dataAdapter.InsertCommand and
dataAdapter.SelectCommand (and dataAdapter.UpdateCommand for that matter)?
Dim da As SqlDataAdapter
conn.Open
da.SelectCommand = New SqlCommand
da.SelectCommand.Connectoin = conn
da.SelectCommand.CommandType = Command.Text
da.SelectCommand.CommandText = "insert Into tbl1 Select * from tbl2"
da.SelectCommand.ExecuteNonQuery
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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: 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: 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: 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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