Fire event on enter key press for a textbox

1. Wrap the textbox inside asp:Panel tags

2. Hide a Button that has a click event that does what you want done and give the <asp:panel> a DefaultButton Attribute with the ID of the Hidden Button.

<asp:Panel runat="server" DefaultButton="Button1">   <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>       <asp:Button ID="Button1" runat="server" style="display:none" OnClick="Button1_Click" /></asp:Panel>

ASPX:

<asp:TextBox ID="TextBox1" clientidmode="Static" runat="server" onkeypress="return EnterEvent(event)"></asp:TextBox>    <asp:Button ID="Button1" runat="server" style="display:none" Text="Button" />

JS:

function EnterEvent(e) {        if (e.keyCode == 13) {            __doPostBack('<%=Button1.UniqueID%>', "");        }    }

CS:

protected void Button1_Click1(object sender, EventArgs e)    {    }

You could wrap the textbox and button in an ASP:Panel, and set the DefaultButton property of the Panel to the Id of your Submit button.

<asp:Panel ID="Panel1" runat="server" DefaultButton="SubmitButton">    <asp:TextBox ID="TextBox1" runat="server" />    <asp:Button ID="SubmitButton" runat="server" Text="Submit" OnClick="SubmitButton_Click" /></asp:Panel>

Now anytime the focus is within the Panel, the 'SubmitButton_Click' event will fire when enter is pressed.