protected void Page_Load(object sender, EventArgs e)
{
// Get the JSON input object from a client.
Hashtable jsonInput = JSONUtil.GetJSONObject(Request);
// Read input data from jsonInput: customer ID
// If you want to know the format of the input and output data,
// go to the description of function checkIfCustomerExists()
// in Ex11_CheckIfCustomerExists_Client.js.
Dictionary <string, object> jsonContent
= (Dictionary <string, object>)jsonInput["content"];
string customerId
= Convert.ToString(jsonContent["customer_id"]);
// Check if the customer exists in the database.
HomeShoppingDataManager dataManager = HomeShoppingDataManager.getInstance();
bool ifCustomerExists = dataManager.checkIfCustomerExists(customerId);
// Create output JSON object.
Hashtable jsonOutput = new Hashtable();
Hashtable jsonOutputHeader = new Hashtable();
Hashtable jsonOutputContent = new Hashtable();
jsonOutputHeader.Add("svc_res_code", 100);
jsonOutputContent.Add("if_customer_exists", ifCustomerExists);
jsonOutput.Add("header", jsonOutputHeader);
jsonOutput.Add("content", jsonOutputContent);
// Send the output JSON object to the client.
// Serializing is needed to transform the object to a string.
Response.Write(JSONUtil.toStringFromJSON(jsonOutput));
Response.End();
}
// This method returns HomeShoppingDataManager object.
// The object is created if it was not created.
public static HomeShoppingDataManager getInstance()
{
lock (syncRoot)
{
if (null == manager)
{
manager = new HomeShoppingDataManager();
}
}
return(manager);
}
// This method returns HomeShoppingDataManager object.
// The object is created if it was not created.
public static HomeShoppingDataManager getInstance()
{
lock (syncRoot)
{
if (null == manager)
{
manager = new HomeShoppingDataManager();
}
}
return manager;
}