You can install the drivers via Xperia E15 i USB driver or as you can see below.
You can use File Manager.
The File manager will use the Android SDK tools "adb"
for that you have to install the tools
if you have not installed it you can download it from here
adb is required to download the drivers via file manager
Q:
NullReferenceException when adding document to collection using Entity Framework Code First
I'm trying to add a new document to a collection (of a typed class) but am running into an error.
Here's the model.
public class User
{
public Guid Id { get; set; }
public string Name { get; set; }
public string Email { get; set; }
public ICollection Tasks { get; set; }
}
public class Task
{
public Guid Id { get; set; }
public string Name { get; set; }
public DateTime DueDate { get; set; }
}
And here's the code that's causing the problem:
var task = new Task() {
Name = "Test",
DueDate = DateTime.Now
};
user.Tasks.Add(task);
db.Users.Add(user);
db.SaveChanges();
If I look at the code and try to debug it, I get a NullReferenceException.
If I remove the "set" from Tasks, the save goes through fine, but then I can't set that property afterwards.
What am I doing wrong?
A:
Try using the constructor:
var task = new Task()
{
Name = "Test",
DueDate = DateTime.Now
};
user.Tasks.Add(task);
db.Users.Add(user);
db.SaveChanges();
That will use the default constructor and populate the properties.
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compatible with x-series xperia
drive with usb 3.0 supported
supports usb 3.0+1.1 hardware port
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