Keypress event in datagridview C#

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Hi,
Do anyone have an idea about the following scenario.
I have a datagridview in which I've handled keypress event for the first datagridviewtextboxcolumn. In my keypress I've allowed characters, digits but no spaces. How to not allow users to give number as first input For eg they cant give
1abc as input but can give as abc123. How to achieve.pls do assist me further

Thanks in advance

Posted 29-Dec-11 18:37pm

CyborgForever

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demouser743 30-Dec-11 3:32am

Can you write down all possible conditions.. Is this valid abc123abc

RaviRanjanKr 30-Dec-11 18:36pm

Not clear! please post your codes.

2 solutions

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sahabiswarup · Answer 1 · 2011-12-29T19:06:00

Solution 1

VB

Private Sub txtValue2_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtValue2.KeyPress
        If ((AscW(e.KeyChar) > 47 And AscW(e.KeyChar) < 58) Or (AscW(e.KeyChar) = 8) Or (AscW(e.KeyChar) = 46)) Then
            e.Handled = False
        Else
            e.Handled = True
            MsgBox("Only numeric charecter allowed")
        End If
    End Sub

This code is an example follow this and do as you want.

happy coding

Posted 29-Dec-11 19:06pm

sahabiswarup

Updated 29-Dec-11 19:08pm

v2

Comments

CyborgForever 30-Dec-11 1:24am

I've already handled the keypress event for datagridviewtextboxcolumn, but I've a condition the first time user gives input he cant enter a number only char, after entering char he can give numbers how to achieve this...

[no name] 30-Dec-11 6:27am

You can do this by extending the example you received from biswarzp88.

if (txtValue2.Text.Length() > 0)...else...

Instead of comparing induvidual you can also use char.IsLetter(..), char.IsNumber(...)

For me the answer needs 5.Regards

demouser743 · Answer 2 · 2011-12-29T21:41:00

Solution 2

I tried this in button click try as per you requirement

Add this regex and make a try [A-Za-z]\w*

C#

string strText = textBox2.Text;
 Regex reg = new Regex("^[A-Za-z]+\\d{0,9}$");
 if (reg.IsMatch(textBox2.Text))
 {
 }
 else
 {
    MessageBox.Show("Invalid");
 }

or you can write some thing like this

C#

if(textBox2.length>1)

    {
    txt = textBox2.substring(0,1);
    if(!((txt >= 'a' && txt <= 'z') || (txt >= 'A' && txt <= 'Z')))
    }

C#

private void button1_Click(object sender, EventArgs e)
        {
            string strText = textBox2.Text;
            Regex reg = new Regex("^[A-Za-z]+\\w*");
            if (reg.IsMatch(textBox2.Text))
            {
                MessageBox.Show("Valid");
            }
            else
            {
                MessageBox.Show("Invalid");
            }
        }

Posted 29-Dec-11 21:41pm

demouser743

Updated 30-Dec-11 0:05am

v3

Comments

CyborgForever 30-Dec-11 5:29am

this allow only characters right both char n no should be allowed, but first one should not be a number, after entering characters numbers can be entered.

demouser743 30-Dec-11 5:33am

Try with my new Regex that i updated

CyborgForever 30-Dec-11 5:49am

I used the exactly the same regex which u have updated it says unrecognised escape sequence.
So I used like this Regex reg = new Regex("^[A-Za-z]+\\w*"); but it allows only character but not numbers

demouser743 30-Dec-11 6:04am

I don't know where you went wrong the same expression working for me check the images http://i.stack.imgur.com/9guXG.jpg http://i.stack.imgur.com/0XwoJ.jpg

demouser743 30-Dec-11 6:05am

Check my updates and try once

CyborgForever 30-Dec-11 6:22am

I'm using it in the Keypress event which is called in EditOncontrolShowing event of DGV

private void dgv_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
if (dgv.CurrentCell.ColumnIndex == 3)
{
DataGridViewTextBoxEditingControl textBox = e.Control as DataGridViewTextBoxEditingControl;
if (textBox != null)
{
textBox.KeyPress -= new KeyPressEventHandler(Control_KeyPress);
textBox.KeyPress += new KeyPressEventHandler(Control_KeyPress);
}
}

}

private void Control_KeyPress(object sender, KeyPressEventArgs e)
{
Regex reg = new Regex("^[A-Za-z]+\\w*");
if (reg.IsMatch(Convert.ToString(e.KeyChar)))
{
e.Handled = false;
}
else
{
e.Handled = true;
}
}

softkhero 13-May-13 4:00am

your code is to larg............ise chhota kro