problem in cs file for validation

Question

hello every one i have very big problem . i want to create cs file for validation where i can make function for numeric validation and character validation when i m created its give me error i m sending u what kind of function i m making on there please check it and reply me if u know easy way to do same thing then plz let me know.......... code// using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace ContaxSoftware { class Validation { public void price_validation(object sender KeyPressEventArgs e) { int num = e.KeyChar; if (e.KeyChar == '.' || num == 8) { e.Handled = false; } else if (!char.IsDigit(e.KeyChar)) { e.Handled = true; } } thanks in Advcance

theLizard · Answer

The validate class nothing special using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace WindowsFormsApplication1 { class validate { public validate() { } public bool isDigitKey(char key) { return(Char.IsDigit(key)? true : false); } public bool isCharKey(char key) { return(!Char.IsDigit(key)? true : false); } } } Key press event private void textBox2_KeyPress(object sender KeyPressEventArgs e) { validate v = new validate(); e.Handled = v.isDigitKey(e.KeyChar); if(!e.Handled) { //do what you want... } } But it might be better to validate in the key up event private void textBox2_KeyUp(object sender KeyEventArgs e) { validate v = new validate(); if(!v.isDigitKey((char)e.KeyCode)) //e.Handled its not a digit { //is it character aA-zZ if(!v.isCharKey((char)e.KeyCode)) //its not a valid character e.Handled = false; //do what you want... } } Much simpler don't you think... But you could also do this in the key up event without a class if(Char.IsDigit((char)e.KeyCode)? true : false) e.Handled = true; if(!Char.IsDigit((char)e.KeyCode)? true : false) e.Handled = true; Much more simpler to do...

Kirtan Patel · Answer

Class1 Code ---------------- class Class1 { public static void PriceValidation( KeyPressEventArgs e) { int num = e.KeyChar; if (e.KeyChar == '.' || num == 8) { e.Handled = false ; } else if (! char .IsDigit(e.KeyChar)) { e.Handled = true ; } } } U sing the Class1 PriceValidate Method in Form ------------------------------------------------------------- using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WindowsFormsApplication13 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void textBox1_KeyPress( object sender KeyPressEventArgs e) { Class1 .PriceValidation(e); } } }

Naeem Khan · Answer

thanks to reply me friend but how can i use in text box key press event.. like what should i do for it.. for Example private void txt_title_KeyPress(object sender KeyPressEventArgs e) { // what should i write code on there to make validation.... } hope you understand what i want sir....

Kirtan Patel · Answer

Friend Found the Cause of Errors if my answer helps you then check Do you like this answer  please :) 1. Add the name space using System.Windows.Forms; 2. you forgot to close the braces of class and Name space :) hope this will solve your problem :) so Final Code is below using System; using System.Collections.Generic; using System.Text; using System.Windows.Forms; namespace WindowsFormsApplication10 { class Validation { public void price_validation( object sender KeyPressEventArgs e) { int num = e.KeyChar; if (e.KeyChar == '.' || num == 8) { e.Handled = false ; } else if (! char .IsDigit(e.KeyChar)) { e.Handled = true ; } } } }