Do You Have Textbox Validation On Windows Forms?

1. private void buttonEnter_Click (object sender, EventArgs e)
3. if (ValidateChildren (ValidationConstraints.Enabled))
5. MessageBox. Show (textBoxName.Text, “Demo Application” – message!);

   Also make sure to set the “CauseValidation” property to the Enter key.The value “true” has been introduced.

   Our window form is now completing its validation.

   Step 3. Select the text field and go to its properties.

   Select Events in Apartments and double-click Submit under Focus Breeze.

   1. private void textBoxName_Validating (object sender, CancelEventArgs e)
   3. if (string .IsNullOrWhiteSpace (textBoxName.Text))
   5. e. Cancel = true;
   6. TextBoxName.Focus ();
   7. errorProviderApp.SetError (textBoxName, “The name must not be empty!”); li class = “”> e.Cancel = false;
   8. errorProviderApp.Class = “”>

   Step definition error (text field name, “”);

6. 1. private void buttonEnter_Click (object sender, EventArgs e)
   3. if (ValidateChildren (ValidationConstraints. Enabled))
   5. MessageBox.Show (textBoxName.Text, “Demo App Message!”);

   Also havemake sure the “CauseValidation” property of the Enter key is set to “true”.

   I want to perform validation where the user always enters an amount in a text box before submitting a new form. But the check I set allows the user to enter spaces and submit part of the form.So how to set a special checkbox so that the user cannot submit the form, there are only blank lines in the textbox.

   invited on November 17 at 7:03 am

   

   

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   Not The Answer You Are Looking For? Check Out Other Questions Tagged With C # .earn Winforms Textbox Validation Or Ask Withhowl Valuable Question.

   You can create your own validation function yourself. This can be very naive, but it works almost like magic. Bool

    private  WithErrors ()    if (textBox1.Text.Trim () == String.Empty)        Present visit; // Returns true if no entry was found or only spaces were found    if (textBox2.Text.Trim () == String.Empty)        returns true;    // Another text field.    false return;private void buttonSubmit_Click (email object, EventArgs e)    if (WithErrors ())           // Notify the user in case of an error.        different            // Do something here ... Submit     

   Resolved on November 17, 2010 at 7:07 am.

   

   

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You can use the RequiredFieldValidator control to validate another control, such as a TextBox. It does this by comparing the values ​​of the other control that suffer from its own InitialValue property, and checking that the true value of the other control is different.

Match pattern For more control, use the pattern attribute to specify the regular expression to match to complete validation. You can also provide an awesome title to be included in the validation message if the topic fails.