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Wednesday 16 August 2017

Catching exceptions and displaying error messages in view using Angular2

We can display cached error message in view from component for that need write the following code
in Appcomponent

export class AppComponent {
    iproducts: IProduct[];
    err: any;
    constructor(private _product: ProductService) {
    }
    ngOnInit(): void {
      this._product.getproducts()
          .subscribe(iproducts => this.iproducts = iproducts,
          error => this.err = error);
    }
}


and in HTML Page or template we need to write  following code. Focus only on bold code rest of the code responsible for get values from service

@Component({
    selector: 'my-app',
    template: `<h1>{{err}}</h1>`,
  })

Catching exceptions and displaying error messages in view using Angular2
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Thursday 30 March 2017

Constants in AngularJs



Constants can be injected everywhere including configuration calls. So when you call module.config and set up states,colors,months,weeks or other run time settings you can inject constant values.

<!DOCTYPEhtml>
<html ng-app="app">
<head>
    <title></title>
<metacharset="utf-8"/>
<script src="Scripts/angular.min.js"></script>
</head>
<body ng-controller ="MyController">
    {{title}}
 
    <script>
        var app = angular.module('app', []);
        // Storing a single constant value
        app.constant('MOVIE_SAMPLE', 'The Movie');
        // Now we inject our constant value into a My controller
        app.controller('MyController', function ($scope, MOVIE_SAMPLE){
$scope.title=MOVIE_SAMPLE;
});
</script>
 
</body>
</html>




Constants in angularJs


Constants in AngularJs




 


















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Thursday 23 March 2017


          

        










Create and Execute a Simple PLINQ Query




















Parallel LINQ (PLINQ) is a parallel
implementation of the LINQ pattern. A PLINQ query in many ways resembles a
non-parallel LINQ to Objects query. 



PLINQ is a query execution engine
that accepts any LINQ-to-Objects or LINQ-to-XML query and automatically
utilizes multiple processors or cores for execution when they are available



The primary difference is that
PLINQ attempts to make full use of all the processors on the system. It does
this by partitioning the data source into segments, and then executing the
query on each segment on separate worker threads in parallel on multiple
processors







Create Parallel LINQ and execute

































Limitations







—  PLINQ
only works against local collections. This means that if you’re using LINQ
providers over remote data, such as LINQ to SQL or ADO.NET Entity Framework,
then you’re out of luck for this version. 



—  Since
PLINQ chunks the collection into multiple partitions and executes them in
parallel, the results that you would get from a PLINQ query may not be in the
same order as the results that you would get from a serially executed LINQ
query. 

 
















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Monday 13 March 2017


          

        









Pass user defined object to ASP.NET Webmethod from jQuery, using JSON




















In .html page



 
<script>



       
function StoreDataInDatabse()
{



            debugger;



            var Employee_Detail = {}



            Employee_Detail.Emp_Name = "Test";



            Employee_Detail.Emp_Age = "24";



            Employee_Detail.Emp_Salary = "1000";



            Employee_Detail.Emp_City = "Ban";







            $.ajax({



                type: "POST",



                url: "default.aspx/Insert_Data",



                dataType: "json",



                contentType: "application/json;
charset=utf-8",



            data: JSON.stringify({ 'Employee_Detail': Employee_Detail }), // Check this call.



                success: function () {







                    alert("Data Has
Inserted")



                }



            })



       
}



    </script>







<div>



 <input type="button" id="btnSave" value="Save Data" onclick="StoreDataInDatabse()"/>



                



</div>













Default.aspx.cs file







[WebMethod]



       
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]



       
public static void Insert_Data(Employee_Detail Employee_Detail)



       
{







        }







Class file



public class Employee_Detail



   
{



       
public string Emp_Name { get; set; }



       
public string Emp_Age { get; set; }



       
public string Emp_Salary { get; set; }



       
public string Emp_City { get; set; }



    }





use same properties names in both places(client side and server side) 














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