spot7.org logo
Home PHP C# C++ Android Java Javascript Python IOS SQL HTML Categories

System.NullReferenceException in VB.NET


You can check for NULL like this:

If Fastboot_Devices_Output IsNot
Nothing AndAlso
Fastboot_Devices_Output.Contains("fastboot") Then
     ToolStripStatusLabel1.Text = "Device found!
[Fastboot Mode]"
     Button1.Enabled = True
     ADB_Check_Result = False
     Fastboot_Check_Result = True
     Button1.Text = "Check for Devices"
End If

As to why your string is Null at the point of this if statement, make sure your while loop isn't setting the variable to Null:

While
Fastboot_Devices_Stream.EndOfStream = False
 Fastboot_Devices_Output =
Fastboot_Devices_Stream.ReadToEnd()
End While

Categories : Vb.Net

Related to : System.NullReferenceException in VB.NET
NullReferenceException using StreamReader in vb
You have to initialize the array first. For example: Dim TownList(10) As TownType Then you have to initialize each TownList: Do Until reader.EndOfStream = True Line = reader.ReadLine Dim record = Line.Split(",") Dim tt As New TownType() tt.Name = record(0) ' .... ' TownList(Count) = tt ' .....' But since you don't know the final size of the array you should use a

Categories : Vb.Net
NullReferenceException when calling Controller.Execute
I am able to execute your code without any exception though the exact scenario in your case could be different. I am not sure, if you did it already, and if you are doing this in Visual Studio then: 1) Wrap the code: controller.Execute(ctx); in a try...catch block so that you should be able to see the exception detail. You can click the "View Detail" at the bottom of exception window so that you

Categories : C#
{System.InvalidOperationException: The parameter conversion from type 'System.String' to type 'System.Collections.Generic.KeyValuePair
An IEnumerable<SelectListItem> is required for a dropdown list, but that is an interface and not a solid implementation... e.g. "what sort of IEnumerable should I create when I serialise? I have no idea!" Change that member to a List<SelectListItem> [Required] [Display(Name = "Gender")] public string selectedGender { get; set; } public List<SelectListItem> Gend

Categories : Asp Net Mvc
How to read a stack trace in ASP.NET NullReferenceException message
Normally, this is where you'd see a line number, but when the pdb symbols are not deployed with your binaries, I believe it reverts to these numbers instead. I'm not positive if they are bytes, instructions, or some other unit to show where in the call tree the current execution is at. Include your PDB symbols with your publish and you should get better debugging information to track down your pro

Categories : C#
NullReferenceException when trying to pass a nested ViewModel to a Partial
You should initialize properties LoginViewModel and RegisterViewModel in the view models constructor public class LoginAndRegisterViewModel { public LoginAndRegisterViewModel() { LoginViewModel = new LoginViewModel(); RegisterViewModel = new RegisterViewModel (); } public LoginViewModel LoginViewModel{ get; set; } public RegisterViewModel RegisterViewModel{ get; set; } } and

Categories : C#
Recently Add
Streamwriter FilleSystem TextFile vb.net
How to add multiple rows
Backgroundworker doesn't move files to correct directories vb.net
XAML child window subclass: "InitializeComponent shadows member in base class." How can I resolve this warning without modifying autogenerated code?
Create and remove controls dynamically
Visual Basic Text Box Array for random number generator - For Homework
How to catch cellmouseclicks in dynamically created datagridviews on TabPages
How to Avoid RunTime Error in List(Of Enum(asByte)).AddRange(List(of Byte))
Using Dynamic Linq to set column name
Set Crystal Reports Jet database password programmatically
resize control.size width designer in vb.net winform ,but this action affected other control size
Overflow Exceptions was unhandled
Read String From Serial port Visual Basic
How to high light rows in list control in vb.net
How Can i know if a string is on MD5 format
activate windows application always
Select item from drop down list using text
Paste text into vb label on formload
vb.net combobox hide item
Deleting record from query table composed of other table's columns(?)
Multithreading - Waiting for threads
Vb.net checkbox won't load from text file
Calculating the value with currency symbols
VB.NET Make Windows shortcuts to different forms in VB.NET program
Visual Basic 2008, Random sting generator with custom length, how to make it?
LINQ - SELECT certain columns
linq any function vb.net
Why am i not receiving serial data in visual studios but i am in putty?
Search a listbox, results will not highlight when searching results found
NullReferenceException using StreamReader in vb
© Copyright 2017 spot7.org Publishing Limited. All rights reserved.