Question

Here is a simplified example of what I am trying to achieve;

<asp:CheckBox runat='server' Checked='<%# this.isChecked %>' id='myCheckBox' /> 

Then in my code behind;

public partial class _Default : System.Web.UI.Page  {     bool _isChecked = true;      public string isChecked     {         get         {             return _isChecked.ToString();         }     }      protected void Page_Load(object sender, EventArgs e)     {     } } 

I am aware that, in this case, I can simply use myCheckBox.Checked = true, but I’m just using this example for illustration purposes. The real control is a custom one, but I’m not having any luck getting this approach to work. It just seems to ignore the value I’m supplying.

Is it valid to use <%# this.isChecked %> in this manner?

EDIT:

Sorry, I wrote this in a hurry and realise that it’s not really clear that I intended ‘checkbox’ to just be an example. I’m just trying to get a server-side bool into any particular attribute of the ASP control, not necessarily the ‘checked’ attribute of the checkbox control.

EDIT 2: Updated my example to use string property rather than boolean field, but it is reporting the following error in my ASPX file now;

Cannot convert type ‘string’ to ‘bool’

Answer 1

If you supply

checked='anything'  

it will be checked (in HTML). You need to omit the checked attribute for it to not be checked, so this will not work.

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After the edit to the question, here is my updated answer:

I would not try to set the attribute in the aspx page, rather I would use the ID and do it in code.

eg.

<asp:Control ID='uxMyControl' runat='server' attributes='other'... /> 

Code behind:

private Boolean mypropery = false;  Page_Load(object sender, EventArgs e) {     this.myproperty = true;     uxMyControl.attributes = myproperty; }