This question already has answers here:
What is a NullReferenceException, and how do I fix it?
(27 answers)
Closed 7 years ago.
I'm getting System.NullReferenceException: Object reference not set to an instance of an object. Exception with below code.
string avblCount = "0";
if (!string.IsNullOrWhiteSpace(item.PART_AVAILABILITY.AVAIL_COUNT.ToString() as string))
{
avblCount = item.PART_AVAILABILITY.AVAIL_COUNT.ToString();
}
Exception occurred from this line.
if (!string.IsNullOrWhiteSpace(item.PART_AVAILABILITY.AVAIL_COUNT.ToString() as string))
How can i fix this ?
One or more of these entities are null:
item
item.PART_AVAILABILITY
item.PART_AVAILABILITY.AVAIL_COUNT
You should check which one is, and then act accordingly
Related
This question already has answers here:
What is a NullReferenceException, and how do I fix it?
(27 answers)
Closed 1 year ago.
When I am inputting wrong username and password this error shows
this is my code
RegLog reuser = res.ResultAs<RegLog>(); //database result <-- Error Occurs here.
any solution? I already tried to declare it as var but error still persist.
Thank you.
It is because for some reason (probably wrong username and password), the variable res is null.
Try to check a null reference before using res.
Example: if(res == null) { //do something }
This question already has answers here:
What is a NullReferenceException, and how do I fix it?
(27 answers)
Closed 4 years ago.
When filtering a list using lambda where and contains, I get a NullReference error
var servers = _context.Servers.ToList();
servers = servers.Where(t => t.Technology.Contains(technology)).ToList();
But I get a this error:
Exception thrown: 'System.NullReferenceException' in
ServerBuildApp.dll ServerBuildApp.Models.Servers.Technology.get
returned null.
The list of servers contains a 'Technology' property and it contains the string I am passing it, for example "BIZ"
Any ideas? Or am I doing this completely wrong?
You need to check the t.Technology for null.
var servers = _context.Servers.ToList();
servers = servers.Where(t => t.Technology?.Contains(technology) is true).ToList();
You should check t.Technology for null and then check it contains.
This question already has answers here:
What is a NullReferenceException, and how do I fix it?
(27 answers)
Closed 5 years ago.
In my code:
decimal maxPrice = list.Max(i => i.price);
Getting error - Object reference not set to an instance of an object.
NullReferenceException was unhandled by code.
The i value becomes null, though the list count is 6709. How do I resolve this?
So your list contains nulls.
Either filter them: list.Where(l => l != null).Max(...), or prevent the nulls to end up in the list in the first place.
This question already has answers here:
What is a NullReferenceException, and how do I fix it?
(27 answers)
Closed 5 years ago.
I am trying to get Database Data to insert into List View
Error Code:
Unhandled Exception:
System.NullReferenceException: Object reference not set to an instance of an object. occurred
UPDATE 1:
Either shMsg or sqldb is null.
Put a breakpoint on line shMsg = FindViewById<TextView> (Resource.Id.shMsg);Then check if your resource is filled, and if you step 1 execution further, if the variable shMsg has a value.
Then proceed stepping until you realise which object has a null value.
The reason you get this exception is because you're trying to get a property of something that doesn't exist, because it's null.
If the sqldb variable is null, make sure you don't dispose of the connection to the database prematurely, which is a common mistake.
This question already has answers here:
What is a NullReferenceException, and how do I fix it?
(27 answers)
Closed 7 years ago.
Can anybody help me? I keep getting this error "object reference not set to an instance of an object" on line 2150 in my coding here:
Ln 2148 if (Session.CharacterInfo.Timer > 0)
Ln 2149 {
Ln 2150 Session.SendData(RoomChatComposer.Compose(Actor.Id, "You have " + Session.CharacterInfo.Timer + " minutes left until you're paid", 0, ChatType.Whisper));
2151 }
One of the following:
Session is null
Session.CharacterInfo is null
Actor is null
RoomChatComposer is null (this could be calling a static method, if so discard)
ChatType is null (this most likely is enum? if so discard this)
Introduction to debugging