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by: Jason Callas |
last post by:
I have a process that manages a list of trades. Each trade is a separate row in the table. I blast the process with 10,000 new trades in order to stress test it and end up with the below listed exception when I call the NewRow method. The number of times it happens is NOT consistent (sometimes a few times out of 10,000 and sometimes 1000+ times). The app is written in VB and I am using SyncLock everywhere the table is accessed but I am sure it...
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by: Tomas R |
last post by:
I have a datagrid with a dataview(created from a DataTable) bind to it. It displayes coordinates and I have a toolbarbutton that will create a set of new coordinates just like the existing ones, accept that the x-values is mirrored. It's also possible to remove these coordinates, by a method that removes any row with negative x-values. This usually works fine a few times, mirroring and then removing. But then suddenly the NewRow statement...
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by: Kelvin |
last post by:
Hi All,
I wrote a program insert new row between rows while the datatable is
looping. It display the error message.
Exception Details: System.ArgumentException: This row already belongs
to this table.
System.Data.DataTable.InsertRow(DataRow row, Int32 proposedID,
Int32 pos) +319
System.Data.DataRowCollection.Add(DataRow row) +14
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by: Mike |
last post by:
I have an ASP.NET/VB app that updates values in a DataTable over the
course of about 3 different pages. On the way out of the first of
these pages, I explicitly build the DataTable from values in a
DataGrid, and set the PrimaryKey of the DataTable to be the first cell
in the grid (which is a UserID value). I then store the DataTable in
a session object, from which it is retrieved for subsequent pages.
All this seems to be working fine.
...
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by: Chris Ericoli |
last post by:
Hi,
I am working with an 'in session' ado dataset with an asp.net application.
My dataset is comprised of two tables, one of which maintains a few
calculated datacolumns. For some reason these datacolumns do not trigger
their expression when other columns from which the expressions are derived
are updated. Below is a basic example of what I am doing.
User enters values into an asp.net form and clicks a button.
Retrieve dataset from...
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by: DraguVaso |
last post by:
Hi,
I need a FAST way to put the content of a file in a datatable (one record
for each line in the file).
I have a routine for it, but it takes me too much time (2-5 seconds for each
file) to put the lines in the datatable and do some actions. Does anybody
knows a faster method? The fact is: I actually only need the lines starting
with "0*" and "1*".
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by: Doug Bell |
last post by:
Hi,
Is there a more efficient way to append the rows of a DataTable to a second
DataTable that has the same structure?
Currently I am using a For Next loop:
Dim drSource, drTarget as DataRow
For Each drSource in MySourceDataTable
drTarget =MyTargetDataTable.Rows.NewRow
drTarget = drSource
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by: jhansen |
last post by:
I am having problems with my datagridview adding an extra blank row. I
allow the user to enter a row of data, and based upon business rules, I
add additional rows in the following manner. What could be causing
this problem?
DataTable newDataTable;
DataRow newTimeRow;
newTimeRow = newDataTable.NewRow();
newTimeRow = var1;
newTimeRow = var2;
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by: Maxwell2006 |
last post by:
Hi,
I am working with strongly typed datatables.
What is the most efficient way to build a new DataTAble based on the result
of DataTable.Select?
At this point I use a foreach loop to do the work manually. I am looking for
an automated way.
Thank you,
Max
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by: Maart_newbie |
last post by:
Hi all,
I've got a question about returning the value of a pk-column to a
DataTable
after inserting a row (via a data-adapter) using MySql5.
Here is the SQL and code concerned:
//===================================================================
// The table
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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,...
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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: 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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