TextBox.Validated : TextBox « System.Windows.Forms « C# / C Sharp by API

1. C# / C Sharp by API
2. System.Windows.Forms
3. TextBox

TextBox.Validated

  


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void numberBox_Validating(object sender, CancelEventArgs e)
    {
        try
        {
            int numberEntered = int.Parse(numberBox.Text);
            if (numberEntered < 1 || numberEntered > 10)
            {
                e.Cancel = true;
                MessageBox.Show("You have to enter a number between 1 and 10");
            }
        }
        catch (FormatException)
        {
            e.Cancel = true;
            MessageBox.Show("You need to enter an integer");
        }
    }

    private void numberBox_Validated(object sender, EventArgs e)
    {
        MessageBox.Show("Well done, you managed to enter a valid number");
    }

    private void okButton_Click(object sender, EventArgs e)
    {
        this.Close();
    }

}
partial class Form1
{
    private void InitializeComponent()
    {
        this.numberBox = new System.Windows.Forms.TextBox();
        this.label1 = new System.Windows.Forms.Label();
        this.okButton = new System.Windows.Forms.Button();
        this.maskedTextBox1 = new System.Windows.Forms.MaskedTextBox();
        this.SuspendLayout();
        // 
        // numberBox
        // 
        this.numberBox.Location = new System.Drawing.Point(253, 15);
        this.numberBox.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
        this.numberBox.Name = "numberBox";
        this.numberBox.Size = new System.Drawing.Size(57, 22);
        this.numberBox.TabIndex = 0;
        this.numberBox.Validated += new System.EventHandler(this.numberBox_Validated);
        this.numberBox.Validating += new System.ComponentModel.CancelEventHandler(this.numberBox_Validating);
        // 
        // label1
        // 
        this.label1.AutoSize = true;
        this.label1.Location = new System.Drawing.Point(16, 18);
        this.label1.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
        this.label1.Name = "label1";
        this.label1.Size = new System.Drawing.Size(201, 16);
        this.label1.TabIndex = 1;
        this.label1.Text = "Enter a number between 1 and 10";
        // 
        // okButton
        // 
        this.okButton.Location = new System.Drawing.Point(335, 11);
        this.okButton.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
        this.okButton.Name = "okButton";
        this.okButton.Size = new System.Drawing.Size(100, 28);
        this.okButton.TabIndex = 2;
        this.okButton.Text = "OK";
        this.okButton.Click += new System.EventHandler(this.okButton_Click);
        // 
        // maskedTextBox1
        // 
        this.maskedTextBox1.Location = new System.Drawing.Point(0, 0);
        this.maskedTextBox1.Name = "maskedTextBox1";
        this.maskedTextBox1.Size = new System.Drawing.Size(100, 23);
        this.maskedTextBox1.TabIndex = 3;
        // 
        // Form1
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(453, 246);
        this.Controls.Add(this.maskedTextBox1);
        this.Controls.Add(this.okButton);
        this.Controls.Add(this.label1);
        this.Controls.Add(this.numberBox);
        this.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
        this.Name = "Form1";
        this.Text = "Form1";
        this.ResumeLayout(false);
        this.PerformLayout();

    }

    private System.Windows.Forms.TextBox numberBox;
    private System.Windows.Forms.Label label1;
    private System.Windows.Forms.Button okButton;
    private System.Windows.Forms.MaskedTextBox maskedTextBox1;
}
public class TextBoxValidation
{
    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.Run(new Form1());
    }
}

   
    
  

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