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Use javascript to disable it. As you disable the button you might need to post the form using javascript also, as you can't post a form using a disabled button.
---
b { font-weight: normal; }
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I received lots of help last night trying to get text validated. Problem now is I can't "click out" of the 1st TextBox to the next one or close down the App. What to do?
private void textComplex_1Real_Validating(object sender, System.ComponentModel.CancelEventArgs e)
{
TextBox textBox1 = sender as TextBox;
if(textBox1 == null)
return;
if(textBox1.TextLength == 0)
return;
bool error = false;
try
{
cmplxValue1.Real = Convert.ToDouble(textComplex_1Real.Text);
//cmplxValue1.Imaginary = Convert.ToDouble(textComplex_1Imaginary.Text);
//this would be the next TextBox to validate
}
catch(Exception ex)
{
error = true;
}
finally
{
if(error)
MessageBox.Show("Error");
textBox1.SelectAll();
textBox1.Focus();
e.Cancel = true;
}
}
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Hi,
I did not get what actually you are trying
to do.
Please could you specify what u want to achieve...
Regards,
Pramod
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Instead of locking the user inside the textbox until it validates, do something else to show that the data in the textbox is wrong, like changing it's background color, and disable the ability to go further to use the text in the textbox (e.g. the next/send/submit/ok button).
---
b { font-weight: normal; }
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i m working on my study project. i divided that in different modules, now i need to call one module from another module.
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You're going to have to supply ALOT more information than that. What do you want to call, specifically? Some code snippets might help too.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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simply the person wants to open an exe file from the C#.
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The way you asked the question, "module" could mean anything. In this case, another .EXE was the last thing I would have guessed. I was thinking maybe something in a referenced .DLL, or trying to call a method in a class, or maybe something in another namespace, ...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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What are all the way to play an .avi file in my application other these:
Video object of Direct Show
mciSendString (c++ for c#)
using windows media player COM
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Hello all,
I need to prevent user from closing the form if he modify any field and ask him if want save or not?
Please help
Thanks
hay
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Hi.
Take a look on the FormClosing-Event. With e.Cancel in the EventArgs e you can prevent the user from clsoing the Form.
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Hi...
I'm writing a Windows Service in C# that when started opens a socket (Listening Port) that reads ethernet frames, inspects the payload, and logs to a DB certain data within the payload. Obviously I want the frames to be processed at a speed that doesnt' cause any lost packets.
So, do I create a thread for each received frame, to keep the main thread from
being blocked? Do I use a thread pool manager? What's the best design for processing the frames in real-time or close to real-time as possible?
Any suggestions/code snippets would be greatly appreciated.
Thanks,
Tom
thomas.paluzzi@havensolutionsgroup.com
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I am new to object oriented. With classes and objects, what is the equivalent for global varialbe. Suppose I have different forms...each forms has its own class.
If I want to decalre a variable that is common to all forms, so that I can change and retrieve the value of that variable in any form I want, how do I do that.
Thanks.
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In C# declare the variable as a static member of one of the classes. It can be accessed by classname.variable name in the other classes.
I can imagine the sinking feeling one would have after ordering my book,
only to find a laughably ridiculous theory with demented logic once the book arrives - Mark McCutcheon
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A much better way would be to pass the variable to each form as opposed to decalring it as global. For several "global" types declare a class and pass it to each form.
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Hi,
I have a base Form and a base TextBox control. I have derived my Form and TextBox control from the base classes. In the base class of form, I am adding EventHandler for TextChanged Event of TextBox to do some generic operation like setting dirty flag. And again in the Derived View I am using TextChanged Event of TextBox Control to enable/disable the OK button. I am opening the form in Modal form. When I close the Form, it is not getting cleanup from memory. I checked it in .NET Profiler. In the profiler it is showing me that TextChanged EventHandler is still referring the Form. I want to cleanup all EventHandlers on Closed event of the Form. Pls let me know how I can cleanup all EventHandlers for all Controls in the Form. IT IS URGENT. Please let me know.
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If you're showing the form by calling it's .ShowDialog() method, you MUST call .Dispose() on it when you're done with it.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I am also calling .Dispose() after ShowDialog(). Still it is not helping...
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You have to manually unsubscribe.
private void Subscribe()
{
otherForm.TextChanged += new TextChangedDelegate(thisForm_TextChanged);
}
private void Unsubscribe()
{
otherForm.TextChanged -= new TextChangedDelegate(thisForm_TextChanged);
}
Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro
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Actually the problem is that I don't know what all the EventHandlers each Derived Form is using. So it's become very difficult to remove all EventHandlers from each Derived Form manually. I just want to know if there is any way to remove all EventHandlers for all controls in the Form so that I can loop through all controls in the Form and Remove it in Base Form class. Please Help.
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Hello everybody here!!!.
i would like to know how can i add new command to the run process of the windows os for example .
press the following
--------------------
start ---> run --->and type ---->cmd or regedit
it will open the MsDos or Registry of the Windows OS respectively but i want to add new command like this of my own is it some string key or entry in the registry that manages this and by the way yahoo messenger do the same when you expose one friend's email from yahoo online member directory, you will see the online icon and you press that icon with this simple html script:
<code>
<a href="ymsgr:sendim?the_Friend_nickname">the online icon</a>
</code>
and it is it it opens for you private window for chatting with that friend.
I want to add command of my own like this any body has any solutions for this please refer to me with an idea or even an article on this.
As i guess ! it is all related to enter new key value data in the registry in specific part with the extension of your program , but where i don't know any body can help me in this please ..
Thanks for your help.
Mess With The Best And Die Like The Rest
-- modified at 16:00 Friday 14th October, 2005
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It is the path property in the environment that decides where the system will look for programs to run. Back in the days when the system was DOS based, the path was set in the autoexec.bat file. Nowadays you can change it from the properties of "My Computer". When you enter the name of a program in the start...run dialog or at a command prompt, the system first looks for the program in the paths specified in the path property.
The thing that yahoo messenger does is something completely different. "ymsgr" is a protocol, just like "http" or "ftp". It works pretty much as a file type, and the protocols are visible in the file type list in the folder options in Explorer.
Now I hope that you have a bit more information so that you can determine what it is you want to do, really.
---
b { font-weight: normal; }
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Ok maybe I am going dumb here, but I cannot for the life of me figure this problem out. In the MSDE database there is a column called Slides. In that Slide table there is a Version column. Which is defined as a string. It contains data like 1.0.0. Well i am trying to create a typedataset where I just dragged and dropped the Slide table from the server explorer.
That being said, when I go in for the Fill command, I keep getting the InvalidCastException. I tried changing the column types to double etc...but no go. Any suggestion.
Thanks
Sameer
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