ASP.NET 2.0 - Enter Key - Default Submit Button

Posted on 16th Feb 2014 07:03 pm by admin

Hi,One of the most annoying things in developing web pages is handling the "Enter key" for form submission. Enter key has been the favourite way users like to submit forms. Though we provide Buttons to click on, the easiest and intuitive way is that, I can enter some text, make some changes and then hit "Enter" to accomplish my submission.

"Enter" Key is handled in a little tricky way by uplevel browsers like Internet Explorer, when it comes to ASP.NET.

If there is a single Textbox and single button, then it becomes straight forward, the button is submitted. However, the event code doesnt get executed, though the page postsback.If there are two or more, buttons, then it takes up the first button as the default button. However, it still doesnt execute the event handler but just refreshes the page.You can supress the Enter key event using Javascript. But this would result in other undesirable effects like, any Enter key in the form i.e. within Text Area or basically where large text is entered, would be disabled.The earlier work around was to associate a javascript function to each Button to verify the that the relevant button is submitted upon Enter key.ASP.NET 2.0 introduces a wonderful work around for this. By simply specifying the "defaultbutton" property to the ID of the , whose event you want to fire, your job is done.The defaultbutton property can be specified at the Form level in the form tag as well as at panel level in the definition tag. The form level setting is overridden when specified at the panel level, for those controls that are inside the panel.Also, the Event Handler for the specified button, fires thereby simulating a true submit button functionality.The following sample code contains a form and 4 panels with each of them containing different buttons. It can be noticed that for each panel, there is a default button specified which would trigger the corresponding button's event handler when "Enter" Key is pressed upon a text changed event.

The corresponding, sample events for the button clicks are
protected void Button1_Click(object sender, EventArgs e)
{
Response.Write(Button1.Text);
}
protected void Button2_Click(object sender, EventArgs e)
{
Response.Write(Button2.Text);
}
protected void Button3_Click(object sender, EventArgs e)
{
Response.Write(Button3.Text);
}
protected void Button4_Click(object sender, EventArgs e)
{
Response.Write(Button4.Text);
}
protected void btn1_Click(object sender, EventArgs e)
{
Response.Write(btn1.Text);
}
protected void Button5_Click(object sender, EventArgs e)
{
Response.Write(Button5.Text);
}Once we execute the above functionality, we can notice, the corresponding Buttons' text are displayed when the Enter key is pressed from within a panel and at the form level, it fires the btn1 Button's event.Thanks

No comments posted yet

Your Answer:

Login to answer

237 12

Tweet

Other forums

Probably Easy, Need help with Check Boxes in PHP Code
hello,

Thanks for looking this over and helping me out. My problem is I have a online store l

Adding Different Numbers From MySQL
Basically I have a mysql database with a couple prices as the following:

9.99
9.99
9.99

$_FILES array
Ok,

I just started experimenting with PHP today. My goal right now is to have people be able

Cannot Display Array from Select Statement + Login question
Hi,
I'm new to PHP but so far so goog. I was assigend a project and I'm very close to completion.

SELECT * FROM users WHERE Users are not in Blocked
How do I select all users from users table where there users_id is not stored in the block table

Parse Error
Hi Guys,

I have a function in my class which returns a string link variable. The problem is i

Multithreading design
Hi

I have come up with a Singleton class that manages a pool of database connections. Basical

text box alphanumeric caracters only
hi all!

I have search on google on how to enter in a test box only caracters A-Z,a-z,0-9 usi

Files in current folder. Should be an easy fix.
Never mind. I've asked about this before and just found my answer. Anyway to delete this?

Ajax Error since Upgrading to 3.5
Ever since upgrading my site to .NET 3.5 (I needed LINQ), I've been getting this annoying error on o