28-Sep-2015 23:48

Validating numeric values in c net Sri lankan sex video chat

private void text Box1_Key Down(object sender, Key Event Args e) { // Initialize the flag to false. Num Pad9) { // Determine whether the keystroke is a backspace. non Number Entered = false; // Determine whether the keystroke is a number from the top of the keyboard. I have created a form-based program that needs some input validation. I need to make sure the user can only enter numeric values within the distance Textbox.

WPF will show the validation error for you automatically. // Set the flag to true and evaluate in Key Press event.

For the email case, make a two-way data binding from a string property that does Regexp validation in the setter and throw an Exception upon validation error. // Boolean flag used to determine when a character other than a number is entered. non Number Entered = true; } } } } private void text Box1_Key Press(object sender, Key Press Event Args e) { if (non Number Entered == true) { Message Box. Handled = true; } } private void Number_Validating(object sender, Cancel Event Args e) { int val; Text Box tb = sender as Text Box; if (!

private bool non Number Entered = false; // Handle the Key Down event to determine the type of character entered into the control.

If you change your textbox's Shortcuts Enabled to false, then you can't paste garbage into your textbox either (it disables right-clicking). Selection Start == 0) { // If the first character is a minus or digit, AND // if the text does not contain a minus OR the selected text DOES contain a minus.

Most of the previous answers did not take into account selected text.

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Text = "You have not entered a number"; return; } Here's a solution that allows either numeric only with a minus sign or decimal with a minus sign and decimal point.

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