How to give Validation controls in windows form application c#

Question

How to give Validation controls in windows form application c# How to give provide mandatory fields to user to fill the textboxes, and other validation controls

Satyapriya Nayak · Answer

Hi Rashmi, 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 WindowsFormsApplication21 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { if (textBox1.Text == "" || textBox2.Text == "" || textBox3.Text == "" || textBox4.Text == "" || textBox5.Text == "" || textBox6.Text == "" || textBox7.Text == "" || textBox8.Text == "" || comboBox1.Text == "" || comboBox2.Text == "" || comboBox3.Text == "" || comboBox4.Text == "") { MessageBox.Show("Fields cannnot be blank"); } else { MessageBox.Show("Insert"); } } } private void Form1_Load(object sender, EventArgs e) { comboBox1.Items.Add("a"); comboBox2.Items.Add("b"); comboBox3.Items.Add("c"); comboBox4.Items.Add("d"); } } } ------------- 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 WindowsFormsApplication21 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { foreach (Control cnt in this.Controls) { if (cnt is TextBox) { if (cnt.Text == "") { MessageBox.Show("TextBox is Blank."); cnt.BackColor = Color.Pink; } } else if (cnt is ComboBox) { ComboBox cmb = (ComboBox)cnt; if (cmb.SelectedItem == null) { MessageBox.Show("Combox is not Selected."); cnt.BackColor = Color.Plum; } } } } private void Form1_Load(object sender, EventArgs e) { comboBox1.Items.Add("a"); comboBox2.Items.Add("b"); comboBox3.Items.Add("c"); comboBox4.Items.Add("d"); } } } ------------- private void btnSave_Click(object sender, EventArgs e) { ErrorTracker et = new ErrorTracker(errorProvider1); if (TextBox1.Text.Trim() == "") { et.SetError(TextBox1, "Required !"); } if (TextBox2.Text.Trim() == "") { et.SetError(TextBox2, "Required !"); } if (TextBox3.Text.Trim() == "") { et.SetError(TextBox3, "Required !"); } if (TextBox4.Text.Trim() == "") { et.SetError(TextBox4, "Required !"); } int a = et.Count; if (!(a > 0)) { errorProvider1.Clear(); this.SavePatientMessage(); } } Thanks

How to give Validation controls in windows form application c#

Answers (1)