In this article I am explaining different ways to set the default button in ASP.Net Web application.
Default Button property ensures that whenever user presses Enter key the button that is set as default will be triggered.
Default Button in form.
One can set the default button at the form level meaning of all the buttons in the form the one that is set as default will be triggered whenever user presses Enter key.
To set the default button one has to do the following
<form id="form1" runat="server" defaultbutton="Button1">
<asp:Button ID="Button1" runat="server" Text="Button"
OnClick = "Button1_Click" />
<asp:Button ID="Button2" runat="server" Text="Button"
OnClick = "Button2_Click" />
<asp:Button ID="Button3" runat="server" Text="Button"
OnClick = "Button3_Click" />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</form>
You just need to provide the ID of the Button to the defaultbutton property and it is set as default.
If you want to do it from code behind refer below
C#
this.Form.DefaultButton = "Button1";
VB.Net
Me.Form.DefaultButton = "Button1"
Default Button in Master Page
When working with master pages if the button you want to set at default resides in the content page thus the ID of the controls in the content page tend to change hence in that case you need to do the following
C#
this.Form.DefaultButton = Button1.UniqueID;
VB.Net
Me.Form.DefaultButton = Button1.UniqueID
Default Buttons at Panel Level
Default buttons can also be set at the panel level using the DefaultButton property of the panel
<asp:Panel ID="Panel1" runat="server" DefaultButton = "Button1">
<asp:Button ID="Button1" runat="server" Text="Button"
OnClick = "Button1_Click" />
<asp:Button ID="Button2" runat="server" Text="Button"
OnClick = "Button2_Click" />
<asp:Button ID="Button3" runat="server" Text="Button"
OnClick = "Button3_Click" />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</asp:Panel>
This will be useful in case you need to set multiple default buttons and use them for specific set controls. So in that case you can place the button inside different panels and whenever user presses enter key within the scope of that panel the default button for that panel is triggered.
The same can be done from code behind
C#
Panel1.DefaultButton = "Button1";
VB.Net
Panel1.DefaultButton = "Button1"
In case you want to use this with Master Pages you will again need to provide the UniqueID in the same way as done for the form above
Thus I explained here how to set default buttons in ASP.Net Web page
