You can aplly by using 2 way...
1) textbox text changed event
2) button click envet
<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
<br />
<asp:TextBox ID="TextBox4" runat="server" AutoPostBack="True"
ontextchanged="TextBox4_TextChanged"></asp:TextBox>
<asp:Button ID="Button2" runat="server" onclick="Button2_Click" Text="Button" />
<br />
<asp:TextBox ID="TextBox5" runat="server"></asp:TextBox>
protected void Button2_Click(object sender, EventArgs e)
{
DateTime a, b;
a = Convert.ToDateTime(TextBox3.Text);
b = Convert.ToDateTime(TextBox4.Text);
System.TimeSpan span = b - a;
int ddays = (int)span.TotalDays;
TextBox5.Text = Convert.ToString(ddays);
}
protected void TextBox4_TextChanged(object sender, EventArgs e)
{
DateTime a, b;
a = Convert.ToDateTime(TextBox3.Text);
b = Convert.ToDateTime(TextBox4.Text);
System.TimeSpan span = b - a;
int ddays = (int)span.TotalDays;
TextBox5.Text = Convert.ToString(ddays);
}
If you find, it works for you please mark it as ans.
Thanks
Asp.Net/C#.Net help[
^]
Hemant Singh