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by: Terminal882003 |
last post by:
Hi,
I have a problem in my application(C#) if I using RichTextBox to
continuously display a series of text messages (using method
AppendText()). When application is running, it will stop at some point
(randomly), the error message is:
*********************************
System.NullReferenceException: Object reference not set to an instance
of an object.
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by: Jon Cooper |
last post by:
Hi,
I'm developing an app that uses a RichTextBox, and populates it with
colour formatted text at Form Load. However, I randomly receive this
error, which I believe is related to this data population:
Unhandled Exception: System.NullReferenceException: Object reference
not set to an instance of an object.
at System.Windows.Forms.RichTextBox.EditStreamProc(IntPtr dwCookie,
IntPtr buf, Int32 cb, Int32& transferred)
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by: KenH |
last post by:
I am getting an unhandled system exception while writing to a RichTextBox. The process may run for a few hours or days before the error is generated
The message is "Cannot access a disposed object named RICHTEXTBOX." A check of the stack trace indicates the error is from the DLL that controls writing to the RTB. The form has not been closed and the line of code referenced is in a catch block that writes any error to this form's RTB (named...
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by: Nathan Carroll |
last post by:
In an mdi environment I constructed a child for with a richtextbox control
that is used to load .rtf's. This works fine on the intiatial load of the
form but when for is closed and reopened later I get:
System.ObjectDisposedException: Cannot access a disposed object named
"RichTextBox".
Object name: "RichTextBox".
at System.Windows.Forms.Control.CreateHandle()
at System.Windows.Forms.TextBoxBase.CreateHandle()
at...
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by: vertigo |
last post by:
Hello
I have some Threads, and they write something to
RichTextBox.Text property. But sometimes i receive error:
************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance
of an object.
at System.Windows.Forms.RichTextBox.EditStreamProc(IntPtr dwCookie,
IntPtr buf, Int32 cb, Int32& transferred)
at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr
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by: Neo Chou |
last post by:
Greetings!
I'm trying to make my ASPX page able to process WORD format document. I
learned that RichTextBox might help me, but I can't use it either by adding
it to my Web Control list or by writing "<asp:RichTextBox id="c1" />" in the
ASPX file. The error message shows "Cannot find RichTextBox in the
namespace of web controls" (something like that). Is there any way to add
RichTextBox in ASPX file? Or where can I find a substitute?...
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by: Eric |
last post by:
Using the 1.1 framework. We are using a newly created instance of a
RichTextBox Class in our server code to manipulate RTF that is stored
in the database. To clarify, we are not using or attempting to use
this class in the aspx page that calls the code, nor is the 'using
System.Windows.Forms' referenced in any of the aspx pages. The first
client using this software has been experiencing an error that we
cannot reproduce in-house. The...
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by: y2k692hu |
last post by:
Hello
I am trying to run this and I keep getting a "SystemNullReferenceException: Object reference not set to instance of an object" error. I have three menu items bold, italic and underline. When i select the text in my RichTextBox, in order to format it bold, italic or underline, I get that error. The debugger points to my Private Sub UpdateMenuItems - the first line of that sub ->where it says "If rtbMain.SelectionFont.Italic = True ".I want...
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by: James Wong |
last post by:
Hi,
I use the RichTextBox in my program.
It will use different language in this RichTextBox (chinese and english
characters), and it set the "DualFont" and use different fonts.
By the way, how can I print out this content to printer easily?
Thanks!
James
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by: Andrus |
last post by:
I use Winforms RichTextBox control to edit scripts. Scripts are plain ascii
texts.
When error occurs, script engine returns character position of error in code
as integer.
How to position cursor to this character position ?
RichTextBox does not have current position property.
Andrus.
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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: 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: 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: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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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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