Validation IN Windows Forms

rajiv reddy j

13y2k

How do we perform validations in windows forms,except writing IF conditions is there any easy way or method to write Validations...please explain me...it's very helpful for me in my project

5 Replies

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Hemant Srivastava13y ago
Snajeeb is right..asp.net validation control will not work in windows form. For each kind of validation, you need to create your own validation criteria. Generally we use Validated OR Validating event handler to set our own validation. For example, here we check whether input number in the text box is greater than zero or not. If not, displaying error message.

        private void textBox1_Validated(object sender, EventArgs e)
        {
            if (Convert.ToInt32(textBox1.Text) <= 0)
            {
                MessageBox.Show("Invalid Number");
            }
        }

Similarly we could use regular expression (Regex) to check data validation too.
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Satyapriya Nayak13y ago
Blank validation on textbox 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 = ""; } } }
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Sanjeeb Lenka13y ago
HI,

asp.net validation control will not work in windows form.

for asp.net check this link

http://www.c-sharpcorner.com/uploadfile/puranindia/validation-controls-in-Asp-Net/
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rajiv reddy j13y ago
all validation controls which are in ASP .NET
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Sanjeeb Lenka13y ago
which type of validation you want
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