C# 클래스 RSSWeatherGraphicTracker.RSSWeather

Makes a request against RSS Weather service and add update the table

create a WGS1984 geographic coordinate system. In this case, the underlying data provided by the service is in WGS1984.

given a bitmap url, saves it on the local machine and returns its size

get the specified symbol from the symbols table.

Initialize the location table. Gets the location from a featureclass

Initialize a character marker symbol for a given bitmap path

initialize the main table as well as the symbols table. The base class calls new on the table and adds a default ID field.

run the thread that does the update of the weather data

weather ItemAdded event handler

gets fired when an item is added to the table

Load the information from the MajorCities featureclass to the locations table

the main update thread for the data.

Since the information is coming from a web service which might take a while to respond, it is not logical to let the application hang while waiting for response. Therefore, running the request on a different thread frees the application to continue working while waiting for a response. Please note that in this case, synchronization of shared resources must be addressed, otherwise you might end up getting unexpected results.