Question

i have a form with two modes
one that allows edit (value of text box)

and another mode for (non-manager) user – code behind adding “READONLY” to the TextBox tag.

so with the readonly ‘mode’ there’s no input accepted in text box at all

my question is how could i execute validation method based on “READONLY” property of text box ?

strRo = “READONLY” on a condition

<asp:TextBox ID="txtNumbers" runat="server" <%=strRo %> onkeypress="return allowonlynumbers();" />

javascript function

   function allowonlynumbers() {
        if (event.keyCode >= 48 && event.keyCode <= 57) {
            return true;
            }

        else {
            alert('Only numbers can be entered');
             return false;
        }

    }

Answer 1

You would need to pass a reference to the element in your function call, so change the onkeypress to this:

onkeypress="return allowonlynumbers(this);"

Then, your function needs to be like this:

function allowonlynumbers(obj) {

}

And the logic you can use is:

if (obj.readOnly) {
    // The element is readonly
}