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by: Jacob |
last post by:
A simple question:
I've read a couple of things that indicates I can create a new table in my
database using some SQL command. Is this correct? I would like to load a
database into a DataSet, make changes to the existing DataTable(s), add NEW
DataTable(s) if necessary and save the changes back to the database. I'm
stuck on this problem. Any documentation on this would be great.
Thanks,
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by: Mark Broadbent |
last post by:
my brain has short-circuited. I am trying to add a DataTable to an existing
DataTable (of same schema i.e. no columns etc). Cannot find an add method of
datatable and the rows add method has no overload for multiple rows.
Any ideas?
--
Br,
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by: Kelvin |
last post by:
Hi All,
While the existing datatable is looping, I can insert new row into
datatable, but I can't insert it between datarows. All new rows will
inserted into buttom row. Please advise!
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by: Prince |
last post by:
Hi all,
Can anyone tell me how to create auto generated values in a DataTable
column?
Looking forward for the reply....
Thanx in advance...
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by: Bennett Haselton |
last post by:
If I have just filled a DataTable in a typed DataSet with a single
row, is there a way I can make a copy of that row, so that I can clear
the DataTable in that DataSet and use it for another query, but my
copy of the row will be preserved?
If I try to do something like this:
this.oleDbWbuserAdapter.SelectCommand.CommandText =
"SELECT * FROM wbuser where username='bennett';";
this.oleDbWbuserAdapter.Fill(ds1.wbuser);
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by: Doug Bell |
last post by:
Hi,
I am having problems trying to create a (temporary) DataTable from a
selection from a DataGrid (dgOrders).
dtOrdDetails is declared as a Public DataTable
Sub is:
Dim stFilter as String
Dim OrdersRows() as DataRow
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by: Sergio Montero |
last post by:
I have a MustInherits Base class that implements a custom IDataLayer
interfase. IDataLayer expose CRUD methods. Base class constructor requires
two parameters:
ConnectionString
TableName
Another assembly, sharing the root namespace, contains a set of Custom
attributes used to validate properties values, just like the Validation
Application Block.
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by: =?Utf-8?B?UGV0ZXI=?= |
last post by:
I want to create a new column in a datatable from two existing columns. I
have no problem to create the new column using the datatable.columns.add
method. The problem is the value of the new column may become system.dbnull
since one of the two existing columns may have system.dbnull. How can I fix
it so the new column will get the value of the other column even the other
column is system.dbnull?
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by: cj |
last post by:
I have a program to display queries to a SQL db. I type my query in a
textbox and click a button and the results display in a datagrid. I
could use either dataset or datatable to read the data in then I make
the datagrid.datasource = myds.Tables(0) or mydt. Now what I want is to
be able to change the query and click the button again and get the new
results. I can use clear() to clear the data from a ds/dt but I need
the structure gone...
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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: 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...
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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...
|
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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