textbox validation in c#

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C#

how validate textbox that should accept character not the numeric values.
pls any one having idea about this pls share.

Posted 3-Sep-12 22:44pm

SamWakchaure

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3 solutions

Solution 1

Try This Link

Click Here

You can use FilteredTextBox Property of the AjaxToolKit.

Example:

VB

<ajaxToolkit:FilteredTextBoxExtender ID="ftbe" runat="server"
    TargetControlID="TextBox3"
    FilterType="Custom, Numbers"
    ValidChars="+-=/*()." />

Posted 3-Sep-12 22:46pm

sunandandutt

Updated 3-Sep-12 22:49pm

v3

Comments

SamWakchaure 4-Sep-12 4:50am

i want to validatee for windows forms

sunandandutt 4-Sep-12 4:52am

You can try Parshad_kulkarni Answer for Windows.

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Prasad_Kulkarni · Accepted Answer · 2012-09-03T22:49:00

Solution 2

Try this:

C#

void CharacterValidation(object sender, KeyPressEventArgs e)
       {
           if ((e.KeyChar >= 65 && e.KeyChar <= 90) || (e.KeyChar >= 97 && e.KeyChar <= 122) || e.KeyChar == 32 || e.KeyChar == 8)
           {
               e.Handled = false;
           }
           else
           {
               e.Handled = true;
           }
       }

Posted 3-Sep-12 22:49pm

Prasad_Kulkarni

Comments

__TR__ 4-Sep-12 4:51am

5ed!

Prasad_Kulkarni 4-Sep-12 4:54am

Thank you TR!

D-Kishore 4-Sep-12 5:07am

Mine 5

Prasad_Kulkarni 4-Sep-12 5:22am

Thank you Kishore!

ridoy 4-Sep-12 5:44am

good..+5

Prasad_Kulkarni 4-Sep-12 6:38am

Thank you Ridoy!

Mohamed Mitwalli 4-Sep-12 8:24am

5+

Prasad_Kulkarni 4-Sep-12 8:26am

Thank you Mohamed!

Manas Bhardwaj 4-Sep-12 16:14pm

yup 5ed!

Prasad_Kulkarni 5-Sep-12 0:03am

Thank you Manas!

D-Kishore · Accepted Answer · 2012-09-03T23:07:00

You can also do using regex in the button click event like below

C#

bool Valid = false;

C#

private void button1_Click(object sender, EventArgs e)
        {

            Regex rx = new Regex("^[a-zA-Z]*$");
            if (!string.IsNullOrEmpty(TxtProjectName.Text))
            {
                if (rx.IsMatch(TxtProjectName.Text))
                {
                    Valid = true;
                }
                else
                {
                    MessageBox.Show("Numbers are not allowed.");
                    TxtProjectName.Clear();
                    TxtProjectName.Focus();
                    return;
                }
            }
            else
            {
                MessageBox.Show("Please enter a project name and click Ok.");
                TxtProjectName.Focus();
                //this.ControlBox = true;
                return;
            }
        }