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by: Fabio Papa |
last post by:
Hi,
I am fairly new to programming and and even newer to dotnet. I appoligise in advance if this is a dumb questions, and I would appreciate if you could answer it anyways. :)
I am writing a windows service wich sends emails to customers at a specific time. My app retrieves cities and the city's associated time from a database, waits until the specified time for each city and sends out the appropriate emails. Below is some code that is...
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by: Rafael |
last post by:
Hi, I hope I can find some help for this problem
IDE: Visual Studio.NET 2003 Developer Editio
Language: C#
Problem: "An unhandled exception of type 'System.NullReferenceException' occurred in system.windows.forms.dll. Additional information: Object reference not set to an instance of an object.
Visual Studio's IDE is not allowing me to develop projects in C#... I've trying to create a simple Windows Forms project using Visual Studio.NET...
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by: Matthias Kwiedor |
last post by:
Hi!
I want to create a WebBrowser Control at runtime. So i ported the "at
start creation" of the Control to a new routine.
Everything works fine, but i implement the BeforeNavigateFix and a own
Content Menu. For this i need this lines:
public void create_new_browser()
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by: Enrico Pangan |
last post by:
I'm trying to call some functions in a C++ Dll, "Library.dll" from C#.
Some functions work but some return the NullReferenceException. I have
here the source code for the C++ version and for the C# version. The
C++ version works while the C# version returns the
NullReferenceException on a call to Connect().
The Open() and Close() functions works on both C++ and C# version. The
Connect() function only works using C++.
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by: Ghada Ayed via DotNetMonster.com |
last post by:
Hello every body,
please help me in this problem
i have written the following C# code in VS.Net and when i run the window
application i have got 'System.NullReferenceException' so please if
anybody can help reply to this message.
portion of the Code
static void Main()
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by: Raed Sawalha |
last post by:
i have a windows form(Main) with listview, when click an item in listview i
open other window form (Sub) which generate the selected item from parent
window in as treeview items when click any item in treeview i display the
content item in axWebBrowser, i close the sub form normally when i close the
main the following error is generated
An unhandled exception of type 'System.NullReferenceException' occurred in
system.windows.forms.dll
...
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by: msnews.microsoft.com |
last post by:
I'm trying to fill an array of objects but when I add the first object I get
a NullReferenceException.
----------------------------------------------------------------------------
-------------------------------------------
Public Class TestClass
Public NextSubIndex As Integer = 1
Public arrTestSubClass() As TestSubClass
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by: AAguiar |
last post by:
I have an asp.net project where the code behind the aspx page calls a c#
class which makes calls to a managed static C++ class.
The C# class works fine when the asp net worker process starts, when it is
invoked by pressing "F5", or when the web.config file is modified.
In all these cases the web.config file contains <identity
impersonate="false" />.
The mysterious problem arrises when I set <identity impersonate="true"/> in
the...
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by: roopsd |
last post by:
I am using VS.NET 2003 with crystal reports XI release 2. I get a
runtime error at the following line:
oRptForm.crystalReportViewer.ReportSource = oReport
An unhandled exception of type 'System.ExecutionEngineException'
occurred in mscorlib.dll
If I put the following statement inside a try catch block, it gives me
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by: Paul |
last post by:
Hello All,
In the following code I was expecting to get a NullReferenceException,
but that didn't happen. I was hoping someone could explain why.
I have two classes, Form1 and Ticker. As soon as Form1 is loaded I am
expecting the Timer's elapsed event, ticking_Elapsed, to happen once
every second and for a NullReferenceException to occur since ticking is
not initialized, but nothing happens. I added the
MessageBox.Show("Done") to...
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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: 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...
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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: 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: 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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