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is there any way to access the from object from another class,usually i create the obj of form then using that obj we access the obj from form then why it give me the null reference erroe, and im sur that obj has obj referenc but it cannot send this reference to other class,(why)
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i face the same problem when ever i try to acces any object of form from any other calss (within same project)
how to acces the form object (like picture) from any other calss
i use the form obj to acces the formobjfrom other class but it give reference inmstance error
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That is because it is obviously not instantiated properly. A form is a class designed to store stuff that is displayed on the screen (within that form). If you are not going to display it on the screen then your design is screwed up and you should reconsider what you are doing.
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Colin Angus Mackay wrote: That is because it is obviously not instantiated properly
how to instantiat object properly?
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SomeClass instance = new SomeClass();
or variations on that theme. See the class documentation in MSDN for details. Some objects use static Create methods instead.
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Hi...
In my application i am receiveing some text on serialPort but i dont want to display all the received text.
e.g. My received text is " Current Time : 08 NOV 2006"
so i just want to display... "08 NOV 2006" in a textbox with my application.
In serialport communiation i have to use SerialPort.ReadExisting(); & because of this i am getting text(" Current Time : 08 NOV 2006") in DataReceived Event as " Cu" , "rrent", "Tim", "e : 08"... I want to say i'm receiving my text in parts.
My applcation should remove " Current Time : " & it should display only time in a textbox.
Can anybody give me any suggestions to implement this in my application...
Thanks in adavance,
Vinay
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Hi,
youc an have the result in a string variable and then replace 'Current Time :' with empty string.
like if strTime is the string containinf "Current Time : 08 NOV 2006" then
<br />
strTime = strTime.Replace("Current Time :", "");<br />
Mubashir
Every job is a self portrait of the person who did it.
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store the incoming text in a string and then you can use the split method of string to split it by ':'. this way you will be able to get two strings of that time. So you can easily display the time and not the text.
regards
sAqIb
"Our scientific power has outrun our spiritual power. We have guided missiles and misguided men."
Dr. Martin Luther King Jr.
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Thanks...
can you help me for one more thing...
If i am waiting for some text on my SerialPort & after receiveing that text only i have to transmit some text then how i can do that.
e.g. say i've to set the date. & am waiting for text "Set Date : "... & after receiveing this on comport i have to transmit "08 NOV 2006"
Thanks for your replies,
Vinay
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Dear friends,
I have one simple user control in my web based application with five buttons.
When i used it on the webforms of my application as a user control it does not give me the events for Save, Delete, Add etc.
Please can some one help me out in this matter how to raise event on the webform with the user control. Your quick response will be highly appreciated.
Thanks
Murtuza
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There are no events for save/delete/add, unless you're using a grid control that offers them.
You probably need to define your problem more. If your control needs to pass events to the main form, you need to hook them up in the form.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Hi
i am trying to check for the existance of a directory using C# but don't know exact format to use it.
My.Computer.FileSystem.DirectoryExists("C:\\directoryname")
can someone help me by guiding me to the exact way of knowing the existance of directory.
regards
sAqIb
"Our scientific power has outrun our spiritual power. We have guided missiles and misguided men."
Dr. Martin Luther King Jr.
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hi!
try this
DirectoryInfo dr1 = new DirectoryInfo("c:\\dirname");
if (dr1.Exists)
{
MessageBox.Show("Directory Exists")
}
abhinav
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saqib82 wrote: My.Computer.FileSystem.DirectoryExists("C:\\directoryname")
This is VB, VB has nasty shortcuts ( nasty because they don't flow to C# ).
if (System.IO.Directory.Exists(@"c:\Directoryname"))
{
// Whatever
}
The @ allows you to type \ without having to do \\
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Thanks christian, i was trying to do something like we do in vb. But finally i did the same thing that you have suggested. Sorry you are late, but thanks again for your help.
regards
sAqIb
"Our scientific power has outrun our spiritual power. We have guided missiles and misguided men."
Dr. Martin Luther King Jr.
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I have a problem in textbox i want when somebody enter a character in the textbox the textbox show another char (Unicode Char) for example if entered 'd' the textbox show 'h'(or Unicode char)
is there any Solution?
With Thanks
MHF
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you can do so using the event of KeyUp. Do whatever you want to do in that event and as the user will write some character, that character will immediately be converted to your desired character
regards
sAqIb
"Our scientific power has outrun our spiritual power. We have guided missiles and misguided men."
Dr. Martin Luther King Jr.
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Sorry but i can't understand exactly please give me a sample
With regards
MHf
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I guess you are creating a textbox for custom non english language. Follow the following steps which will help you out.
<br />
- Derive a class from TextBox.<br />
- Override OnKeyPress protected function (This is called before character is displayed on the screen).<br />
- Read e.KeyChar.<br />
- And finally replace e.KeyChar with new character.<br />
 Thats it...
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But e.KeyChar is readonly ????
MHF
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My project has to start a execute file : DPAPIAdminUtility.exe. When DPAPIAdminUtility.exe starts, there are many textbox to input data. Now I want to pass argument directly in code so that when DPAPIAdminUtility.exe start, every textbox will be filled by value I pass in code. So, how to know property name of each textbox? And how to pass argument by ini file? Could anyone help me. Thanks
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u can pass arguments in following way
System.Diagnostics.Process.Start("complete path of exe to start","argument1,argument2,...");
rahul
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I am not sure but i think you will not be able to pass arguments by ini file. you will haev to write code to read from ini file.
regards
sAqIb
"Our scientific power has outrun our spiritual power. We have guided missiles and misguided men."
Dr. Martin Luther King Jr.
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Hi folks,
I've got a pair of classes (A and B), where A instantiates an instance of B. What I want to do is:
A.DoStuff();<br />
A.B.DoSomeStuff();<br />
A.DoMoreStuff();
The problem is that B.DoSomeStuff() is asynchronous, and A.DoMoreStuff is called before B is done with its processing. For my specific case, B is an instance of the WebBrowser object, and most of the processing happens in its DocumentComplete event handler.
It strikes me that I should create an event and an event handler, but for the life of me I've been unable to hook this all together successfully. Are events the way to go, or should I implement some type of callback mechanism here?
Any suggestions or pointers will be gratefully received.
Thanks,
Kevin
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Do you want A.DoMoreStuff to be called after B.DoSomeStuff is complete?
If you do then add a call to A.DoMoreStuff(); in the DocumentComplete Handler.
I'm not sure i understand what you are trying to do exactly.
Russ
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