Force DataTimePicker to open calendar by F12

[Andrus]

I need that WinForms DateTimePicker opens calendar when F12 key is pressed.
I tried code below but got error

Property or indexer 'System.Windows .Forms.KeyEvent Args.KeyCode' cannot be
assigned to -- it is read only

How to fix ?

Andrus.

public class NullableDateTim ePicker : DateTimePicker {

protected override void OnKeyDown(KeyEv entArgs e) {
base.OnKeyDown( e);
if (e.KeyCode == Keys.F12)
e.KeyCode = Keys.F4;
}
}

[Cowboy \(Gregory A. Beamer\)]

I am not understanding why you would need to set the KeyCode to something
else, if all you want to do is open the DateTimePicker.

If you absolutely need to pass down to base, you can create an EventArg

KeyPressEventAr gs ea = new KeyPressEventAr gs(KeyChar.F4)
base.OnKeyPress (ea);

But, I would think you can pop the control without intercepting the
keystroke.

--
Gregory A. Beamer
MVP, MCP: +I, SE, SD, DBA

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"Andrus" <ko********@hot .eewrote in message
news:uR******** ******@TK2MSFTN GP03.phx.gbl...

>I need that WinForms DateTimePicker opens calendar when F12 key is pressed.
I tried code below but got error

Property or indexer 'System.Windows .Forms.KeyEvent Args.KeyCode' cannot be
assigned to -- it is read only

How to fix ?

Andrus.

public class NullableDateTim ePicker : DateTimePicker {

protected override void OnKeyDown(KeyEv entArgs e) {
base.OnKeyDown( e);
if (e.KeyCode == Keys.F12)
e.KeyCode = Keys.F4;
}
}

[Andrus]

Gregory,

>I am not understanding why you would need to set the KeyCode to something
else, if all you want to do is open the DateTimePicker.

They is no method or property which can be used to open calendar so I tried
this as last effort.

If you absolutely need to pass down to base, you can create an EventArg

KeyPressEventAr gs ea = new KeyPressEventAr gs(KeyChar.F4)
base.OnKeyPress (ea);

I tried

protected override void OnKeyPress(KeyP ressEventArgs e)
{
if (e.KeyChar == (char)Keys.F12)
{
KeyPressEventAr gs ea = new KeyPressEventAr gs((char)Keys.F 4);
base.OnKeyPress (ea);
return;
}

and

protected override void OnKeyDown(KeyEv entArgs e)
{
if (e.KeyCode == Keys.F12)
{
KeyPressEventAr gs ea = new KeyPressEventAr gs((char)Keys.F 4);
base.OnKeyPress (ea);
return;
}

but F12 still does not open calendar.

But, I would think you can pop the control without intercepting the
keystroke.

Which method or property I should use for this ?

Andrus.

"Andrus" <ko********@hot .eewrote in message
news:uR******** ******@TK2MSFTN GP03.phx.gbl...

>>I need that WinForms DateTimePicker opens calendar when F12 key is
pressed.
I tried code below but got error

Property or indexer 'System.Windows .Forms.KeyEvent Args.KeyCode' cannot be
assigned to -- it is read only

How to fix ?

Andrus.

public class NullableDateTim ePicker : DateTimePicker {

protected override void OnKeyDown(KeyEv entArgs e) {
base.OnKeyDown( e);
if (e.KeyCode == Keys.F12)
e.KeyCode = Keys.F4;
}
}

[Stephany Young]

Try using SendKeys to send it an F4.

Look up SendKeys in the help.
"Andrus" <ko********@hot .eewrote in message
news:%2******** *******@TK2MSFT NGP03.phx.gbl.. .

Gregory,

>>I am not understanding why you would need to set the KeyCode to something
else, if all you want to do is open the DateTimePicker.

They is no method or property which can be used to open calendar so I
tried
this as last effort.

>If you absolutely need to pass down to base, you can create an EventArg

KeyPressEventA rgs ea = new KeyPressEventAr gs(KeyChar.F4)
base.OnKeyPres s(ea);

I tried

protected override void OnKeyPress(KeyP ressEventArgs e)
{
if (e.KeyChar == (char)Keys.F12)
{
KeyPressEventAr gs ea = new
KeyPressEventAr gs((char)Keys.F 4);
base.OnKeyPress (ea);
return;
}

and

protected override void OnKeyDown(KeyEv entArgs e)
{
if (e.KeyCode == Keys.F12)
{
KeyPressEventAr gs ea = new
KeyPressEventAr gs((char)Keys.F 4);
base.OnKeyPress (ea);
return;
}

but F12 still does not open calendar.

>But, I would think you can pop the control without intercepting the
keystroke.

Which method or property I should use for this ?

Andrus.

>"Andrus" <ko********@hot .eewrote in message
news:uR******* *******@TK2MSFT NGP03.phx.gbl.. .

>>>I need that WinForms DateTimePicker opens calendar when F12 key is
pressed.
I tried code below but got error

Property or indexer 'System.Windows .Forms.KeyEvent Args.KeyCode' cannot
be
assigned to -- it is read only

How to fix ?

Andrus.

public class NullableDateTim ePicker : DateTimePicker {

protected override void OnKeyDown(KeyEv entArgs e) {
base.OnKeyDown( e);
if (e.KeyCode == Keys.F12)
e.KeyCode = Keys.F4;
}
}