.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
 
Sign In
Register
 
Win Surprise Gifts!!!
Congratulations!!!


Top 5 Contributors of the Month
david stephan

Home >> Code Snippets >> Visual Studio >> Post New Resource Bookmark and Share   

 Subscribe to Code Snippets

Blank validation on textbox

Posted By:satyapriyanayak       Posted Date: July 02, 2014    Points: 40    Category: Visual Studio    URL: http://www.dotnetspark.com  

In this Code Snippets we will know blank validation on textbox in windows.
 

Method-1

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

        private void button1_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                MessageBox.Show("Name Field cannnot be blank");
                textBox1.Focus();
            }
            else
            {
                MessageBox.Show("Correct");
            }
            clear();
        }
        private void clear()
        {
            textBox1.Text = "";
        }
    }
}

Method-2

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 Validation_on_textbox
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            foreach (Control c1 in this.Controls)
            {
                if (c1 is TextBox)
                {
                    if (c1.Text == "")
                    {
                        MessageBox.Show("Name Field cannnot be blank");
                        c1.BackColor = Color.Orange;
                        textBox1.Focus();
                    }
                    else
                    {
                        MessageBox.Show("Correct");
                        c1.BackColor = Color.White;
                    }
                }
            }
            clear();
        }
        private void clear()
        {
            textBox1.Text = "";
        }
    }
}

Method-3

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 Validation_on_textbox
{
    public partial class Form3 : Form
    {
        public Form3()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (textBox1.Text.Trim() == "")
            {
                errorProvider1.SetError(textBox1, "Name Field cannnot be blank");
                textBox1.Focus();
            }
            else
            {
                errorProvider1.Clear();
                MessageBox.Show("Correct");
            }
            clear();
        }
        private void clear()
        {
            textBox1.Text = "";
        }
    }
}


     

Further Readings:

Responses

No response found. Be the first to respond this post

Post Comment

You must Sign In To post reply
Find More code samples in C#, ASP.Net, Vb.Net and more Here

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend