Default value of textbox

Question

How to set value of textbox?

I have this 1 textbox, and i want to set the default value is 0 so that when user not entering anythng my calculation still can.

Answer 1

This can either be done in the markup (.aspx) like:

<asp:TextBox id="txt" runat="server" Text="0" />

Or in the code-behind (.aspx.cs):

txt.Text = 0;

Or if you're using VB.NET:

txt.Text = 0

---

However, if you're doing a calculation based on this, you shouldn't rely on there always being a value in the textbox.

You could do:

Dim txtValue as Integer = 0
If IsNumeric(txt.Text) Then
   txtValue = txt.Text
End If

Answer 2

If you want to use it with numbers, then you can tell the textbox that it should be with numbers, then "0" will be default.

<asp:TextBox ID="TB_Numbers" TextMode="Number" Text="0" runat="server"></asp:TextBox>