Re: Disable copy paste in textbox - C# Discussion Boards

Disable copy paste in textbox

14-May-08 0:22

The FillEllipse method of the Graphics class. You'd create a control with a textbox and a circle drawn around it.

Christian Graus

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D i x y13-May-08 23:08

D i x y

13-May-08 23:08

Hello,
how to disbale copy paste from and to textbox programatically

Harvey Saayman13-May-08 23:17

13-May-08 23:17

hey

you might be able to "catch" the event of(ctrl + c) and (ctrl + v) and not handle it...
that might do the trick

Hav fun

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Christian Graus13-May-08 23:17

13-May-08 23:17

You may be able to do this by catching the keystrokes and rejecting them. I don't think there's a paste event. You would probably need to reset the clipboard after a CTRL-Insert or CTRL-C, b/c it's probably already done.

dan!sh 13-May-08 23:43

13-May-08 23:43

Like this:

private void textBox1_KeyDown(object sender, KeyEventArgs e) {<br />
      if(e.Control && e.KeyCode == Keys.C) {<br />
        e.SuppressKeyPress = true;<br />
        }<br />
      else if(e.Control && e.KeyCode == Keys.V) {<br />
        e.SuppressKeyPress = true;<br />
        }<br />
      }

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Bhim Prakash Singh14-May-08 0:10

Bhim Prakash Singh

14-May-08 0:10

private void textBox1_KeyDown(object sender, KeyEventArgs e) {
if(e.Control && e.KeyCode == Keys.C) {
e.SuppressKeyPress = true;
}
else if(e.Control && e.KeyCode == Keys.V) {
e.SuppressKeyPress = true;
}
}
this is good, but i do't want to this code paste in all control.
i want this code type only one time

dan!sh 14-May-08 0:17

14-May-08 0:17

prakash_adysoft wrote:
i do't want to this code paste in all control.
i want this code type only one time

Do you mean you want this code to execute only once?
If yes then just unbind it using

this.textBox1.KeyDown -= new KeyEventHandler(this.textBox1_KeyDown);

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phannon⁸⁶14-May-08 0:25

phannon⁸⁶

14-May-08 0:25

Aside from the fact he probably shouldn't have just posted up this code as an instant solution (requiring the OP to do nothing for himself), the code only needs to be written once, you can bind one event to multiple controls.

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Giorgi Dalakishvili14-May-08 0:34

Giorgi Dalakishvili

14-May-08 0:34

What if the user copies or pasties using context menu of the textbox?

Giorgi Dalakishvili

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dan!sh 14-May-08 0:49

14-May-08 0:49

Just reinitialize the context menu of the textbox during form load without any items in it.

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Anthony Mushrow14-May-08 1:10

Anthony Mushrow

14-May-08 1:10

I actually found a bug, where you can still get the context menu even when you do that.
If i remember right, to get the context menu to STILL appear, you right-click the text box and hold the button down - move you mouse off of the text box - and then release the button. Then the normal menu appears Confused | :confused:

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dan!sh 14-May-08 1:36

14-May-08 1:36

Thanks for find.

How about handling this in WndProc method then?

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Handle error

ellllllllie13-May-08 22:57

ellllllllie

13-May-08 22:57

hello,

I have an application that allow me to create many Forms.
When i open many forms i get this error : Error creating windows handle.
After i check for this kind of error, there is many suggestion to minimize the number of controls(handles) because each process do suppport a specified number of controls.
but my forms contain a user controls and more thing that i can't remove.
Do someone have any idea fr this kind of error.

Best regards,

dghdfghdfghdfghdgh

Christian Graus13-May-08 23:21

13-May-08 23:21

Hard to make sense of this. How many windows do you have open ?

ellllllllie13-May-08 23:39

ellllllllie

13-May-08 23:39

about 50 windows

dghdfghdfghdfghdgh

Christian Graus14-May-08 0:02

14-May-08 0:02

Well, that is just a nightmare for the end user, but I don't see why Windows can't handle it.

ellllllllie14-May-08 0:09

ellllllllie

14-May-08 0:09

error :
Error creating windows handle win32Exception

i think because the number of handle exceed a specifiv limit .
What to do ?

dghdfghdfghdfghdgh

Inheritance Qusestion

Harvey Saayman13-May-08 22:50

13-May-08 22:50

Hey guys...

in my application all my forms inherit from cmdBaseClass which inherits from Form so essentially i have

myForm : cmdBaseClass : Form

now what i want is so inherit cmdBaseClass from a plain class (not a form) but i dont want to inherit Form because this class is not a form

the only way i can think of doing this is creating a 2nd cmdBaseClass and not inherit Form from that one...

is there a better way to do this?

thanx

Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
think BIG and kick ASS

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Christian Graus13-May-08 22:52

13-May-08 22:52

There's no two ways around this b/c C# sucks and does not have multiple inheritance. If you want to be able to use a form and non form as if they are the same with respect to a group of functions, you can use an interface, but you still need to define it twice.

Harvey Saayman13-May-08 23:00

13-May-08 23:00

thanx CG

Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
think BIG and kick ASS

you.suck = (you.passion != Programming)

Harvey Saayman13-May-08 23:14

13-May-08 23:14

dude,

i made a 2nd cmdBaseClass now (does not inherit Form)...

now my "GlobalMethodsClass" needs to inherit the "Non Form CmdBaseClass" but GlobalMethodsClass is STATIC... it moans that static classes should inherit from objects

i don't get it? isn't cmdBaseClass an object? i thought EVERYTHING in an OOP language is considered an object Smile | :)

thanx

Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
think BIG and kick ASS

you.suck = (you.passion != Programming)

Christian Graus13-May-08 23:20

13-May-08 23:20

HarveySaayman wrote:
i made a 2nd cmdBaseClass now (does not inherit Form)...

Two classes with the same name ?

HarveySaayman wrote:
now my "GlobalMethodsClass" needs to inherit the "Non Form CmdBaseClass" but GlobalMethodsClass is STATIC... it moans that static classes should inherit from objects

If the class is static, then all your methods need to be static. I don't know if you can derive a static class from another.

Nope - static classes cannot have a base class. That does make sense, b/c what's the point of a class having a base, when no instances of that class can ever exist ?

Harvey Saayman13-May-08 23:25

13-May-08 23:25

Christian Graus wrote:
Two classes with the same name ?

nope, one is named "cmdBaseForm" and the other "cmdBaseNonForm"

thanx for the help

Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
think BIG and kick ASS

you.suck = (you.passion != Programming)

Christian Graus14-May-08 0:00