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How to force validation of UserControl?

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2

1

Validations for my textbox controls work normally/as expected. However, for my created UserControl, also containing a textbox (which also contains other controls as well), it's not always validated, except when the user manually selects/focuses another control, which will of course fire the Validating event.

Now, I've found from searches about Form.ValidateChildren() (which works btw), but this method validates all children as described in the documentation, which is not the ideal solution to a form with many controls, as opposed to only validating the single control in question.

Additional info:

1. I use ErrorProvider to show errors - I need to consider the position
   of the icon in the case of my UserControl (which again, contains
   multiple controls inside).


2. 
   Validating and Validated events are performed on my UserControl, not the TextBox inside it. Both events are on the form where the usercontrol is used.


3. The Text property of the TextBox inside my UserControl is modified
   internally (inside my UserControl class)

`

//some code inside usercontrol
private void SomeMethod()

 ...
 textBox.Text = ...;
 ParentForm.ValidateChildren(); // works but does this on all controls which is not the ideal operation, which is to perform validation only on this usercontrol

`

With the above-mentioned info, when I modify the Text property manually, the Validating event is, as expected on the design, not raised since UserControl.TextBox != UserControl. It's not an option for me to perform validation on the UserControl.TextBox instead of the UserControl.

With all that explained, how should I manually/forcefully trigger the validation only for the UserControl, when UserControl.TextBox.Text is modified, without resorting to Form.ValidateChildren which targets all of the form controls? Or is it not possible?

c# winforms validation user-controls

share|improve this question

edited Mar 11 at 0:31

Michael Balser

asked Mar 8 at 7:13

Michael BalserMichael Balser

134

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  UserControls have a ValidateChildren() method as well.
  
  – Jimi
  Mar 8 at 7:57
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  As described in the question, the control I need to validate is the UserControl itself, not its children.
  
  – Michael Balser
  Mar 8 at 8:07
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Call UserControl.Validate() then. If the UC has unvalidated controls, overriding OnValidating will intercept it. No matter if AutoValidate is disabled.
  
  – Jimi
  Mar 8 at 8:34
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Tried calling Validate() for UserControl, did not work though. I wonder what is further needed for this to work.
  
  – Michael Balser
  Mar 8 at 8:38
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I don't know what did not work means. Did you change something in some child control? If you don't change anything, OnValidating is not called.
  
  – Jimi
  Mar 8 at 8:40
  

  
  
  
  

 | 
show 5 more comments

2

1

Validations for my textbox controls work normally/as expected. However, for my created UserControl, also containing a textbox (which also contains other controls as well), it's not always validated, except when the user manually selects/focuses another control, which will of course fire the Validating event.

Now, I've found from searches about Form.ValidateChildren() (which works btw), but this method validates all children as described in the documentation, which is not the ideal solution to a form with many controls, as opposed to only validating the single control in question.

Additional info:

1. I use ErrorProvider to show errors - I need to consider the position
   of the icon in the case of my UserControl (which again, contains
   multiple controls inside).


2. 
   Validating and Validated events are performed on my UserControl, not the TextBox inside it. Both events are on the form where the usercontrol is used.


3. The Text property of the TextBox inside my UserControl is modified
   internally (inside my UserControl class)

`

//some code inside usercontrol
private void SomeMethod()

 ...
 textBox.Text = ...;
 ParentForm.ValidateChildren(); // works but does this on all controls which is not the ideal operation, which is to perform validation only on this usercontrol

`

With the above-mentioned info, when I modify the Text property manually, the Validating event is, as expected on the design, not raised since UserControl.TextBox != UserControl. It's not an option for me to perform validation on the UserControl.TextBox instead of the UserControl.

With all that explained, how should I manually/forcefully trigger the validation only for the UserControl, when UserControl.TextBox.Text is modified, without resorting to Form.ValidateChildren which targets all of the form controls? Or is it not possible?

c# winforms validation user-controls

share|improve this question

edited Mar 11 at 0:31

Michael Balser

asked Mar 8 at 7:13

Michael BalserMichael Balser

134

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  UserControls have a ValidateChildren() method as well.
  
  – Jimi
  Mar 8 at 7:57
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  As described in the question, the control I need to validate is the UserControl itself, not its children.
  
  – Michael Balser
  Mar 8 at 8:07
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Call UserControl.Validate() then. If the UC has unvalidated controls, overriding OnValidating will intercept it. No matter if AutoValidate is disabled.
  
  – Jimi
  Mar 8 at 8:34
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Tried calling Validate() for UserControl, did not work though. I wonder what is further needed for this to work.
  
  – Michael Balser
  Mar 8 at 8:38
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I don't know what did not work means. Did you change something in some child control? If you don't change anything, OnValidating is not called.
  
  – Jimi
  Mar 8 at 8:40
  

  
  
  
  

 | 
show 5 more comments

Validations for my textbox controls work normally/as expected. However, for my created UserControl, also containing a textbox (which also contains other controls as well), it's not always validated, except when the user manually selects/focuses another control, which will of course fire the Validating event.

Now, I've found from searches about Form.ValidateChildren() (which works btw), but this method validates all children as described in the documentation, which is not the ideal solution to a form with many controls, as opposed to only validating the single control in question.

Additional info:

1. I use ErrorProvider to show errors - I need to consider the position
   of the icon in the case of my UserControl (which again, contains
   multiple controls inside).


2. 
   Validating and Validated events are performed on my UserControl, not the TextBox inside it. Both events are on the form where the usercontrol is used.


3. The Text property of the TextBox inside my UserControl is modified
   internally (inside my UserControl class)

`

//some code inside usercontrol
private void SomeMethod()

 ...
 textBox.Text = ...;
 ParentForm.ValidateChildren(); // works but does this on all controls which is not the ideal operation, which is to perform validation only on this usercontrol

`

With the above-mentioned info, when I modify the Text property manually, the Validating event is, as expected on the design, not raised since UserControl.TextBox != UserControl. It's not an option for me to perform validation on the UserControl.TextBox instead of the UserControl.

With all that explained, how should I manually/forcefully trigger the validation only for the UserControl, when UserControl.TextBox.Text is modified, without resorting to Form.ValidateChildren which targets all of the form controls? Or is it not possible?

c# winforms validation user-controls

share|improve this question

edited Mar 11 at 0:31

Michael Balser

asked Mar 8 at 7:13

Michael BalserMichael Balser

134

//some code inside usercontrol
private void SomeMethod()

 ...
 textBox.Text = ...;
 ParentForm.ValidateChildren(); // works but does this on all controls which is not the ideal operation, which is to perform validation only on this usercontrol

share|improve this question

edited Mar 11 at 0:31

Michael Balser

asked Mar 8 at 7:13

Michael BalserMichael Balser

134

share|improve this question

edited Mar 11 at 0:31

Michael Balser

asked Mar 8 at 7:13

Michael BalserMichael Balser

134

asked Mar 8 at 7:13

Michael BalserMichael Balser

134

asked Mar 8 at 7:13

Michael BalserMichael Balser

134