Autopost back On Hitting Enter Key

Sometimes we need to postback to server & execute a particular event if user hit the enter key after filling the textbox. For this we need to associate our text box control with a button we want to execute as if we clicked on the button.

* For this we can call a javascript function which will force the button click event

* Call the click event of the button if enter key is pressed.

* Register the javascript function for the controls

This is checked in firefox,IE & Chrome and is working correctly.

C# Code

-----------

protected void Page_Load(object sender, EventArgs e)
{

txtProductName.Attributes.Add("onkeypress", "return AutoPostBackOnEnterKey(event,'" + btnSearch.ClientID + "')");
txtProductID.Attributes.Add("onkeypress", "return AutoPostBackOnEnterKey(event,'" + btnSearchByProductID.ClientID + "')");
}



protected void btnSearch_Click(object sender, EventArgs e)
{
//Code
}

protected void btnSearchByProductID_Click(object sender, EventArgs e)
{
//Code
}




Javascript Function
--------------------
function AutoPostBackOnEnterKey(e, buttonid)
{
var evt = e ? e : window.event;

var bt = document.getElementById(buttonid);

if (bt)
{
if (evt.keyCode == 13)
{
bt.click();
return false;
}
}
}

When you press a key on your keyboard, the js OnKeyPress event is fired. This calls a function to which we pass the id of the button associated with the TextBox. The function gets a reference to the button and simuilates a mouse-click on the Button. We perform a browser detection because IE and Netscape have different event models. The function finally returns false so that the keypress event is cancelled (otherwise a second form submit will be raised)

Works in following

Code & Idea is from here