Windows Phone read local data
During windows phone development, sometimes we might be want to read some initial data from local resources. Data can be stored in XML, JSON, TXT or other formats. Unlike data files stored in Isolatedstorage, we cannot make changes to them or delete them (since they are built in Content or Resource). Which format is better ? Well, it depends. So let me make a simple demo to show you how we read initial data in windows phone. Read XML Files Assuming that we have following xml file The root Element is Students which has four child element Student. How can we load them in windows phone .We can do that in many ways. Before we do that we create Student class first. Way 1. Add System.Xml.Linq reference then we can use following code to load students in one collection Remeber to set Students.xml build action to Content. Way 2. use Application.GetResourceStream Note: that Application.GetResourceStream is suitable for all file format. We can use Application.GetResourceStream to load txt files, json files , dat files and whatever format. What you need to do is prepare data and read the file stream, convert to what you want. you can find source here <?xml version="1.0" encoding="utf-8" ?> <Students> <Student> <Name>Alexis</Name> <Age>12</Age> <No>007</No> </Student> <Student> <Name>Tomcat</Name> <Age>20</Age> <No>62</No> </Student> <Student> <Name>Jacky</Name> <Age>32</Age> <No>001</No> </Student> <Student> <Name>Selina</Name> <Age>24</Age> <No>033</No> </Student> </Students>
public class Student {
public string Name { get; set; }
public int Age { get; set; }
public string No { get; set; }
}
XElement root = XElement.Load("Students.xml");
if (root != null)
{
var items = from student in root.Descendants("Student")
select new Student {
Age = Convert.ToInt32(student.Element("Age").Value),
Name = student.Element("Name").Value,
No = student.Element("No").Value,
};
listBox1.ItemsSource = items;
}
var streamInfo = Application.GetResourceStream(new Uri("Students.xml", UriKind.Relative));
using (var stream=streamInfo.Stream)
{
XElement root = XElement.Load(stream);
if (root != null)
{
var items = from student in root.Descendants("Student")
select new Student {
Age = Convert.ToInt32(student.Element("Age").Value),
Name = student.Element("Name").Value,
No = student.Element("No").Value,
};
listBox1.ItemsSource = items;
}
}
Windows Phone 實用開發技巧(25):Windows Phone讀取本地數據
發表評論
所有評論
還沒有人評論,想成為第一個評論的人麼? 請在上方評論欄輸入並且點擊發布.