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by: gregory_may |
last post by:
This code seems to "work" but I get the following errors:
An unhandled exception of type 'System.NullReferenceException' occurred in
system.windows.forms.dll
then this one:
An unhandled exception of type 'System.ExecutionEngineException' occurred in
system.windows.forms.dll
Anyone know how to either trap these errors or prevent them from happening?
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by: Eduard Ralph |
last post by:
Hi,
I have a weird exception happening when calling the new operator. I'm
not sure if this is the intended reaction to the situation or is
actually a problem I've got. In any case a different error message
would be helpful. I would like to know your thoughts on this problem.
The situation:
I have an external Library of C Functions and Structures which are
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by: Subrata |
last post by:
hi All,
I'm trying to call a COM component written in PowerBuilder from an
ASP.NET application. The first method call into the COM component (developed
using PB) is failing with 'Object reference not set to an instnace of an
object' error.
Observations:
1. I can call the same PB COM component from a .NET Windows application
successfully.
2. I can call another COM component (developed using ATL COM, MSVC 6.0)
from the ASP.NET application.
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by: Daniel Manes |
last post by:
I need a strategy to debug this situation...
I can't put all the code involved, but here are some of the critical
lines with comments:
-------------------------
Private _parentDataCell As DataGridViewCell 'declare private field
_parentDataCell = _parentDataGrid.Rows(rowIndex).Cells(columnIndex)
'set to a specific cell
Debug.Print(_parentDataCell.DataGridView.ToString) 'prints:
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by: Hexman |
last post by:
Hello All,
I'd like to find out the best way to add a cb column to a dgv and process efficiently. I see at least two ways of doing it.
-------------------------------
1) Add a cb to the dgv, iterate thru the dgv and update the bound fields if the cb has been checked. Then do the update and accept changes. How do I
access the cb and its checked status? How to iterate thru dgv?
Dim cbSelCol As New DataGridViewCheckBoxColumn
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by: Zytan |
last post by:
I just got the strangest error. I have exception code that catches a
null reference exception:
catch (NullReferenceException ex) { ... }
The handling code does nothing but print out data from within the
object, ex. So, nothing is changed. And I've found that the
exception object, ex, ITSELF is null!
So, by accessing it to print its innards, it throws another
NullReferenceException (which is, of course, unhandled)! Printing...
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by: weird0 |
last post by:
I am assigning an arrlist to the datasource property of the
datagridview. In short, i want to update the datagridview. But the
moment, i assign it. The application crashes. It does not display the
updated state of the datagridview neither throws any exception. Here
is some of the following code:
public void AddState(string stateName,float Prob) // Add a
new state, to the arrlist
{
StateTable newState = new StateTable();
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by: Ryan Liu |
last post by:
I have a program works fine in .NET 1.1 and just recompiled in .NET 2.0
without any code change. Compiles OK, but there is an exeception when
execute it.
Then I remove PK, it works all fine again.
Is this a known bug : PK on auto increase DataColumn in DataTable cause
NullReferenceException?
dcLineId = new DataColumn(LINEID_STR,
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by: =?Utf-8?B?S2lt?= |
last post by:
foreach (DataGridViewRow row in this.dataGridView.Rows)
{
if (row.Cells.Value.ToString() == "true")
{
return true;
}
}
return false;
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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: 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...
|
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: 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: 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: 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: 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: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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