Angular JS and ASP Server Side Control Validation - asp.net

Question

I am using angular JS for asp.net server side controls
<div class="gridpage mb40" name="myForm" ng-model="myForm" ng-form
<div class="form-group">
<label class="">Name of the Supplier:</label>
<asp:TextBox ID="txtSupName" CssClass="form-control" runat="server" ng-model="txtSupName" name="txtName" required></asp:TextBox>
<p ng-show="myForm.txtName.$invalid && !myForm.txtName.$pristine" class="help-block">Your Name is Required.</p>
</div>
</div>
problem is at run time when i deploy my code , name property changes for server side control so i am not able to render paragraph of error messages
is there any other way through which i can access control instead of myform.txtName.$invalid??
tried with clientIDmode= Static , it keeps id static but name still changes,

Answer 1

Try this solution jsfiddle.
Create a directive alias, which stores a reference to ngModelController, which is independent of the name of input (asp:TextBox).
var myApp = angular.module('myApp', []);
myApp.controller('MyCtrl', function($scope, $log) {
})
.directive('alias', function() {
return {
restrict: "A",
require: "ngModel",
scope: {
alias: "="
},
link: function(scope, elem, attr, ngModel) {
scope.alias = ngModel;
}
}
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp">
<div ng-controller="MyCtrl">
<form name="myForm">
<input name="txtName" ng-model="txtName" required alias="aliasName" ng-pattern="/^[0-9]+$/">
<div ng-if="myForm.txtName.$error.required">Name is reauired by name</div>
<div ng-if="aliasName.$error.required">Name is reauired by alias</div>
<div ng-if="myForm.txtName.$error.pattern">Invalid pattern by name</div>
<div ng-if="aliasName.$error.pattern">Invalid pattern by alias</div>
<br>
<pre>myForm.txtName.$error = {{myForm.txtName.$error|json}}</pre>
<pre>aliasName.$error = {{aliasName.$error|json}}</pre>
</form>
</div>
</div>