In aspx Page
<script type="text/javascript">
function NotAllowSpace(e){
var Shashi =(window.event) ? event.keyCode : e.keyCode;
if (window.event) Shashi = window.event.keyCode;
if((window.event.shiftKey))
{
if((Shashi > 48 && Shashi < 57))
{
return false;
}
else if((Shashi > 96 && Shashi < 105))
{
return false;
}
else if((Shashi == 46))
{
return false;
}
else if((Shashi == 8))
{
return false;
}
else
{
return false
}
}
else
{
if((Shashi > 48 && Shashi < 57))
{
return true;
}
else if((Shashi > 96 && Shashi < 105))
{
return true;
}
else if((Shashi == 46))
{
return true;
}
else if((Shashi == 8))
{
return true;
}
else if((Shashi == 57))
{
return true;
}
else if((Shashi == 48))
{
return true;
}
else if((Shashi > 65 && Shashi < 90))
{
return true;
}
else if(Shashi==65)
{
return true;
}
else if(Shashi==90)
{
return true;
}
else if((Shashi == 16))
{
return false;
}
else
{
return false;
}
}
}
</script>
<asp:TextBox ID="TextBox1" runat="server" onkeydown="return NotAllowSpace(this);" >asp:TextBox>
Shashi Ray