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I'd like to store components in a TreeStructure and wanted to be able to design the TreeStructure within the designer. So I've made a Class Item which itself has a Collection ItemCollection (this is the same like TreeNode which has itself a TreeNodeCollection).
This should work and it worked, but:
As I add my items and the subitems and want to save with "OK" there is the following error:
"Object not set to an instance of an Object" - this happens only, if I add Items to a level higher than two:
Item1
SubItem (OK)
SubItem (Error when saving)
Item2
Item3
...
I do not know which Object is null.
Can anyone help me with this problem?
Thank a lot!
Stefan
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I know my answer is not what you expected, but if you have a IDE you can go step by step into the code and find out why it doesn`t work. Your problem may come form a bad code line, or a wrong condition.
I hope you understand...
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Thank you for your answer.
I design the Collection in the Form-Designer, so Debugging is not possible.
The problem is that I cannot see what the Designer wants to code because the designer tries to put code and cannot because the code would be wrong, so I can't see what the designer want to write.
Thanks
Stefan
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Hi Gurus!
I developing a C# asp.net application. I want my application write something to it's own event log, but when I trying
to do this I got folllowing error -
"Requested Registry Access Is Not Allowed" Error Message When ASP.NET Application Tries to Write New EventSource in the EventLog
I found some solutiong here - http://support.microsoft.com/?id=329291 but it not helps in my case... I have done all modifications to my code exactly like in former article, but I still recieve this error...
I hope someone could help me. Thanx.
xedom developers team
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Alex Getman wrote:
I have done all modifications to my code exactly like in former article, but I still recieve this error...
Its not a code-alone fix. The registry entry needs to be create on the machine with a user with sufficient priviliges.
Alex Getman wrote:
xedom developers team
403: Forbidden 
top secret xacc-ide 0.0.1
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1.
So if I understood you right - there is no solution exists for my problem throught code tricks?
2. I know. It's all about money
xedom developers team
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Alex Getman wrote:
there is no solution exists for my problem throught code tricks?
You have to have appropriate permissions to write to the registry, does that make sense?
- Nick Parker
My Blog | My Articles
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Well, yes, it does. All I need it's just to install my application and when an error occurs to write some entry to the EventLog. Is possible to do it in some way without manual registry tuning?
xedom developers team
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Alex Getman wrote:
All I need it's just to install my application and when an error occurs to write some entry to the EventLog. Is possible to do it in some way without manual registry tuning?
You stated that your application was an ASP.NET application, which changes things. The question should be in the ASP.NET forum. You need to understand that your ASP.NET application is running under the ASPNET user account, which does not have appropriate privileges to create the event source. You can programmatically change the registry (to thus allow you to create the event source), however the account you are running as (ASPNET in your case) must have appropriate permissions to do so. Making changes to the registry is something that can be done with an install package, however the person installing the application also needs to have appropriate rights as well. Does that make sense?
- Nick Parker
My Blog | My Articles
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Hi,
I would add some labels to my form at run time. I want to delete a lebel, when I press del button.
Can we handle keydown/keyup/keypress event for a label ?? Is it possible ??
CNU
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hi,
Here i have a form with a button control.I am trying to remove button on keydown event.
"Keys" enumeration will help you do find the possiblity of other key's. Here i am check only delete key.
private void button1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
if(e.KeyCode==Keys.Delete)
this.Controls.Remove(button1);
}
this is a sample lead to achive your task. remaining is upto yop to develop
**************************
S r e e j i t h N a i r
**************************
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It is OK with a button control. But for a Label there is no key realted events defined. So, how can we handle keydown event??
CNU
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Upto my leval best it won't recognize keypress/keydown/keyup . I think so other guru can help you out.
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S r e e j i t h N a i r
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Exactly !! I too think the same.
Can we have a button control without border...means it looks like a label ??
I tried with FlatStyle property but invain.
CNU
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hi,
override th paint event
And check for this.
private void button1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
e.Graphics
}
this property is very flexible and self explanatory
**************************
S r e e j i t h N a i r
**************************
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I have done like this and it works well :
<br />
private void OnPaint(object sender, System.Windows.Forms.PaintEventArgs e)<br />
{<br />
System.Windows.Forms.Button btnMsg = (Button)sender;<br />
if(btnMsg == null) return;<br />
Rectangle borderRectangle = btnMsg.ClientRectangle;<br />
ControlPaint.DrawBorder(e.Graphics, borderRectangle, this.pnlHost.BackColor, System.Windows.Forms.ButtonBorderStyle.Solid); <br />
}<br />
Thanks a lot Sreejith !!
Cheers
CNU
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hi,
your welcome.
**************************
S r e e j i t h N a i r
**************************
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You could write your own class that inherits from Control giving you access to the KeyDown, KeyPress, and KeyUp events or you could simply override the WndProc, watch for the appropriate windows messages and act accordingly.
- Nick Parker
My Blog | My Articles
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HI~
I have written an application using C#
There are some dlls. After a few day, I have updated some of the dlls(not in the same project of the orginial application). After I copy the new dll to the application directory and run it, runtime error occured. I know it is the dll version problem. So, can we ignore the version of the dll so that the application can be run without the runtime error? Or there is any other solution to solve the problem?
Thanks
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hi,
try to check your AssemblyInfo.cs and make sure the version info.
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S r e e j i t h N a i r
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Is this statement specify the assemblyVersion?
[assembly: AssemblyVersion("1.0.*")]
Can I change this to
[assembly: AssemblyVersion("1.0.1000.10000")]
?
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Goahead
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S r e e j i t h N a i r
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Did you register your assemblies (dll) in C:\WINNT\assembly folder (for WIN 2K)??
If yes, you have to again regiter the dll files in the assembly, every time you change them.
CNU
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I am writing private assembly.
The dll is just for the application use.
In fact, can the application run regardless the version of the dll?
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Yes...it is very much possible. As far as my knowledge goes, the version comes into picture only when you register the dll in assembly (correct me if I'm wrong).
It seems there could be some other problem. Why don't you put the error message here (that comes in your output window) ?? Or put a try catch block where your refer the dll's methods and print the exception...
Cheers
CNU
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