using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.Script.Serialization; // needed for JSON serializers

using System.IO; // needed for Stream and Stream Reader

using System.Net; // needed for the Web Request

using Core2WebAPI; // needed for the Customer class

using System.Data; // needed for DataSet class

namespace WebAPIClient

{

public partial class CustomerAPIExample : System.Web.UI.Page

{

String webApiUrl = "http://cis-iis2.temple.edu/users/pascucci/CIS3342/CoreWebAPI/api/CustomerService/";

protected void Page_Load(object sender, EventArgs e)

{

lblDisplay.Text = "";

}

protected void btnDisplayCustomers_Click(object sender, EventArgs e)

{

// Create an HTTP Web Request and get the HTTP Web Response from the server.

WebRequest request = WebRequest.Create(webApiUrl + "GetCustomers/");

WebResponse response = request.GetResponse();

// Read the data from the Web Response, which requires working with streams.

Stream theDataStream = response.GetResponseStream();

StreamReader reader = new StreamReader(theDataStream);

String data = reader.ReadToEnd();

reader.Close();

response.Close();

// Deserialize a JSON string that contains an array of JSON objects into a collection of Customer objects.

JavaScriptSerializer js = new JavaScriptSerializer();

List<Customer> customers = js.Deserialize<List<Customer>>(data);

// Bind the list to the GridView to display all customers.

gvCustomers.DataSource = customers;

gvCustomers.DataBind();

}

protected void btnAddCustomer_Click(object sender, EventArgs e)

{

// Create an object of the Customer class which is avaialable through the web service reference and WSDL

Customer customer = new Customer();

customer.Name = txtName.Text;

customer.Address = txtAddress.Text;

customer.City = txtCity.Text;

customer.State = txtState.Text;

customer.Zip = txtZip.Text;

customer.Email = txtEmail.Text;

// Serialize a Customer object into a JSON string.

JavaScriptSerializer js = new JavaScriptSerializer();

String jsonCustomer = js.Serialize(customer);

try

{

// Send the Customer object to the Web API that will be used to store a new customer record in the database.

// Setup an HTTP POST Web Request and get the HTTP Web Response from the server.

WebRequest request = WebRequest.Create(webApiUrl + "AddCustomer/");

request.Method = "POST";

request.ContentLength = jsonCustomer.Length;

request.ContentType = "application/json";

// Write the JSON data to the Web Request

StreamWriter writer = new StreamWriter(request.GetRequestStream());

writer.Write(jsonCustomer);

writer.Flush();

writer.Close();

// Read the data from the Web Response, which requires working with streams.

WebResponse response = request.GetResponse();

Stream theDataStream = response.GetResponseStream();

StreamReader reader = new StreamReader(theDataStream);

String data = reader.ReadToEnd();

reader.Close();

response.Close();

if (data == "true")

lblDisplay.Text = "The customer was successfully saved to the database.";

else

lblDisplay.Text = "A problem occurred while adding the customer to the database. The data wasn't recorded.";

}

catch (Exception ex)

{

lblDisplay.Text = "Error: " + ex.Message;

}

}

protected void btnFindCustomer_Click(object sender, EventArgs e)

{

// Find a record in the database using the web service method that returns a Customer object

// Create an HTTP Web Request and get the HTTP Web Response from the server.

WebRequest request = WebRequest.Create(webApiUrl + "GetCustomerByName/" + txtName.Text);

WebResponse response = request.GetResponse();

// Read the data from the Web Response, which requires working with streams.

Stream theDataStream = response.GetResponseStream();

StreamReader reader = new StreamReader(theDataStream);

String data = reader.ReadToEnd();

reader.Close();

response.Close();

// Deserialize a JSON string that contains an array of JSON objects into a Customer object.

JavaScriptSerializer js = new JavaScriptSerializer();

Customer customer = js.Deserialize<Customer>(data);

if (customer != null)

{

// Use the object's values to populate the form's controls.

txtName.Text = customer.Name;

txtAddress.Text = customer.Address;

txtCity.Text = customer.City;

txtState.Text = customer.State;

txtZip.Text = customer.Zip;

txtEmail.Text = customer.Email;

}

else

{

lblDisplay.Text = "No record found by that customer name.";

}

}

protected void btnFindCustomers_Click(object sender, EventArgs e)

{

// Retrieve the list containing all the customers returned by the web servier method via proxy.

// Create an HTTP Web Request and get the HTTP Web Response from the server.

WebRequest request = WebRequest.Create(webApiUrl + "GetCustomersByName/" + txtName.Text);

WebResponse response = request.GetResponse();

// Read the data from the Web Response, which requires working with streams.

Stream theDataStream = response.GetResponseStream();

StreamReader reader = new StreamReader(theDataStream);

String data = reader.ReadToEnd();

reader.Close();

response.Close();

// Deserialize a JSON string that contains an array of JSON objects into a collection of Customer objects.

JavaScriptSerializer js = new JavaScriptSerializer();

List<Customer> customers = js.Deserialize<List<Customer>>(data);

// Bind the list to the GridView to display all the customers with a given name.

gvCustomers.DataSource = customers;

gvCustomers.DataBind();

txtName.Text = "";

txtAddress.Text = "";

txtCity.Text = "";

txtState.Text = "";

txtZip.Text = "";

txtEmail.Text = "";

if (customers.Count == 0)

{

lblDisplay.Text = "No records found by that name.";

}

}

}

}