[Solved] RadTabStrip with tabs containing Silverlight grids.

[Michael Fernandez]

I'm using a RadTabStrip that contains RadTabs with Silverlight grids (RadGridView). The grids are configured with validators. On postback while attempting to save to the database I'm having the following issue: Can't move focus to the control because it is invisible, not enabled, or of a type that does not accept the focus. The Java script debugger breaks on the d.focus() call in the script segment below. This segement is from RadInputControl.js from Telerik.Web.UI. d is the Silverlight grid and its offsetWidth is 0 at this point. Also, this grid is not on the current visible tab. Let me know if you need more information.

Thanks, Mike Fernandez

if(typeof(ValidatorSetFocus)=="function"){
   ValidatorSetFocus=function(f,c){
        var d;
        if(typeof(f.controlhookup)=="string"){
            var a;
            if((typeof(c)!="undefined")&&(c!=null)){
                if((typeof(c.srcElement)!="undefined")&&(c.srcElement!=null)){
                   a=c.srcElement;
                }
                else{
                   a=c.target;
                }
           }
           if((typeof(a)!="undefined")&&(a!=null)&&(typeof(a.id)=="string")&&(a.id==f.controlhookup)){
               d=a;
           }
        }
        if((typeof(d)=="undefined")||(d==null)){
            d=document.getElementById(f.controltovalidate);
        }
        var b=false;
        if((d.style)&&(typeof(d.style.visibility)!="undefined")&&(d.style.visibility=="hidden")&&
        (typeof(d.style.width)!="undefined")&&(document.getElementById(d.id+"_text")||
        document.getElementById(d.id+"_dateInput_text"))&&(d.tagName.toLowerCase()=="input"||
        d.tagName.toLowerCase()=="textarea")){
            b=true;
        }
        if((typeof(d)!="undefined")&&(d!=null)&&(d.tagName.toLowerCase()!="table"||(typeof(c)=="undefined")
            ||(c==null))&&((d.tagName.toLowerCase()!="input")||(d.type.toLowerCase()!="hidden"))&&
            (typeof(d.disabled)=="undefined"||d.disabled==null||d.disabled==false)&&(typeof(d.visible)=="undefined"||
            d.visible==null||d.visible!=false)&&(IsInVisibleContainer(d)||b)){
            if(d.tagName.toLowerCase()=="table"&&(typeof(__nonMSDOMBrowser)=="undefined"||__nonMSDOMBrowser)){
                var g=d.getElementsByTagName("input");
                var e=g[g.length-1];
                if(e!=null){
                    d=e;
                }
            }
            if(typeof(d.focus)!="undefined"&&d.focus!=null){
                if(b&&document.getElementById(d.id+"_text")){
                    document.getElementById(d.id+"_text").focus();
                }
                else {
                    if(b&&document.getElementById(d.id+"_dateInput_text")){
                        document.getElementById(d.id+"_dateInput_text").focus();
                    }
                    else{
                        d.focus();  //breaks here.
                    }
                }
                Page_InvalidControlToBeFocused=d;
            }
        }
    };
}

[Michael Fernandez]

This turned out to be a problem with one of our custom validators and not an issue with the RadTabStrip.