enable button, only when text entered in textbox

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hello experts,

am working on asp.net login page, in this i have 2 textboxes and login button.

My requirement is user can only click the login button if the text is entered in textboxes.

Just I want to enable login button, when text is entered in textbox.

Please can you help me how to do this.

thanks forever.

Posted 23-Jun-13 22:54pm

Member239258

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3 solutions

Solution 3

C#

protected void TextBox1_TextChanged(object sender, EventArgs e)
{
   if(TextBox1.Text1 != 0)
   {
      Button.Enabled = true;
   }
}

Posted 23-Jun-13 23:09pm

King Fisher

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Prasad_Kulkarni · Accepted Answer · 2013-06-23T22:58:00

Solution 2

Try this way:

C#

protected void TextBox1_TextChanged(object sender, EventArgs e)
{
   if(TextBox1.Text.Trim().Length > 0)
   {
      Button.Enabled = true;
   }
}

Refer more detailed description about textchanged event[^]

Posted 23-Jun-13 22:58pm

Prasad_Kulkarni

Comments

VICK 24-Jun-13 8:23am

Hi Prasad... I have a question .. ie.. forexample if i have the same scenario but i want the button to be enabled after both textboxes got filled than can i do that in the following way or can u guide me in this regard,

protected void TextBox1_TextChanged(object sender, EventArgs e)
{
if(TextBox1.Text.Trim().Length > 0 && TextBox2.Text.Trim().Length > 0 )
{
Button.Enabled = true;
}
}

Prasad_Kulkarni 24-Jun-13 8:49am

Hello Khan Ji,

The above code will not work as on you're not moved to second text box and this
&& TextBox2.Text.Trim().Length > 0 condition always fails.

You need to do something like:


private void textBox1_TextChanged(object sender, EventArgs e)
        {
            if (textBox1.Text.Trim().Length > 0)
            {
                if (textBox2.Text.Trim().Length > 0)
                {
                    dataGridView1.Visible = true; 
                }
                
            }
        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {
            textBox1_TextChanged(sender, e);
        }

Hope it helps!

VICK 24-Jun-13 8:53am

ahan.. thanks dear.. now got cleared.. :)

Prasad_Kulkarni 24-Jun-13 8:55am

Glad to here!

sudipta biswas · Accepted Answer · 2013-06-23T22:58:00

Solution 1

Call a javascript function onchange event of textbox. There you can do this

JavaScript

document.getElementById("your button id").disabled = false;

Posted 23-Jun-13 22:58pm

sudipta biswas

Updated 23-Jun-13 23:00pm

v2

enable button, only when text entered in textbox

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enable button, only when text entered in textbox

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