An Unhandled Exception Of Type 'System.NullReferenceException'
Feb 15, 2012
i have this code in my btnsave..it can detect conflicts but after that a dialog box saying: An unhandled exception of type 'System.NullReferenceException' occurred in AppointmentSchedulingClient.exe
Additional information: Object reference not set to an instance of an object. and it points to the green one below.
If Val(cbostart.Text) > Val(cboend.Text) Or Val(cbostart.Text) = Val(cboend.Text) Then
MsgBox("Error in time.", MsgBoxStyle.Information, "MESSAGE")
[Code].....
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Apr 26, 2010
I get this message each time I run the appA first chance exception of type 'System.NullReferenceException' occurred in <Applicaton>I have isolated the key Subs which seem to upset it, but I cannot for the life of me figure out what it is about it that's upsetting it. I have used On Error Goto etc for the time being, which gets around it but I would like to solve it rather than jumpver it.Err.Description returns "Object reference not set to an instance of an object."My sub looks like this:
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Feb 9, 2012
Private
Sub cmdExit_Click(ByVal
sender As System.Object,
ByVal e
[code]....
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Mar 21, 2011
get out from the below loop
Shared Function GetIPAddress() As String
Dim sam As System.Net.IPAddress
Dim sam1 As String
[code]....
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Jan 18, 2010
For i = 1 To 60
Me.Controls("picturebox" & i).BackColor = Color.White
Next
i want to change backcolor of picturebox but when i run program,i get this error :
An exception of type 'System.NullReferenceException' occurred in EZEE Restaurant.exe but was not handled in user code
Additional information: Object reference not set to an instance of an object.i go to Project->Add reference and then look for "System.NullReferenceException" but i don't find it.
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Aug 5, 2010
I'm converting another project from VS2003 to VS2010 and am getting this message in the Immediate Window before I hit my MyBase.Load. From the warning, it looks like somting is undefined yet is being used - causing an exception. How can I trace this down?My app uses 2 DLLs, could the msg be coming from them during their load?
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Feb 19, 2010
When I run my project I get "An unhandled exception of type 'System.StackOverflowException' occurred in System.Windows.Forms.dll"
Public Class frmViewReport
Dim objForm As New frmViewReport
Private Sub frmViewReport_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
objForm.ViewReport("C:a2.rtp", , "@parameter1=test�mter2=10")
[code]....
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May 6, 2009
I keep getting an eroor this error says: An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in system.windows.forms.dll Additional information: Specified argument was out of the range of valid values.
Option Strict On
Public Class frmWeeklyReport
Inherits System.Windows.Forms.Form
[code].....
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Nov 29, 2011
Here are parts of my
Dim setting As My.MySettings
lvl As Integer
Dim xp As Integer
Dim xpt As Integer
[code]....
I have done the settings as type integer and set the values that I wanted but I get this error: A first chance exception of type 'System.NullReferenceException' occurred in Click Game concepts.exe
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Feb 1, 2010
i tried getting rid of a few "dim msearch as new" etc. which is what the error msg comes up with. but it just keeps making it worse.[code...]
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Jun 24, 2009
At first it was when I was trying to output to a text file, I disabled that for testing purposes and now I'm getting it randomly again.. Here is the code that always seems to throw the exceptio:
[Code]...
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Feb 5, 2005
why this error comes up it has happened in most of my projects and i don't know how to fix it.An unhandled exception of type 'System.StackOverflowException' occurred in Unknown Module.
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Dec 20, 2010
I am getting a stack overflow exception during the process of my program. yes I have used recursion method in my application and can't see any other logic to get the data. Scenerio is I need to present the data in the grid as BatchNo|Parent|Date|Qty|Cost columns. I have stock history and old stockhistory table(17 million records).
Public Class Form1
Dim dtAgeing As DataTable
Dim sTransdate As String
Dim dcCost As Decimal
[code]....
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Apr 1, 2009
I am Using Visual Studio 2008 Express edition (.NET Framework 3.5) ... I got this Error when Using A recursive Call To a Function .. I have 3 Background Workers Which Select Data From Database With Status =0 , Take The file Name And File Path Asssosiated With That record, and Then Copy it to other place and on successful completion update the status to 2 otherwise to 3 . and again searech for other record having Status 0 and so on ..
i made a method for selection of record from database every worker call this function . Now I have a check when dataset is filled i checked is there any row ? if yes then it do the rest of work otherwise agin call it self to search for the record...ECURSION.. In Case of records with status zero , It works Fine But in Case of no records Which have status zero it recursively calls itself For approx 1.5 mints and then throws The Exception That " System.StackOverflowException occured in mscorlib.dll at line "DataAdapter.Fill(Dataset,Table)" . I have no Idea what to do with this ..
Eventhough I have Encloesd It in Try...Catch Blocks but It didnt Cath It .. I serached The Internet and msdn social help for it and i found that it occurs most with infiniteloop or Infinite Recursive calls. i know it is due to my recursive call to the SelectData Function But i have no option without it?And One thing more that this project i mean the exe of this project is concurrently runs with another project Which add data to the databse about Filename Filepath and status =0 for Fresh entry..
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Dec 22, 2010
My MSSQL 2008 and VS2005 were corrupted out of sudden. I had reinstalled .net Framework 2.0, .net Framework 2 SP2, MSSQL 2008 and VS2005.
After installation and without any code modification, I tried to debug the program and I got the below error message.An unhandled exception of type 'System.TypeInitializationException' occured in Production.exe.Additional information: The type initializer for 'Common' threw an exception.
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Jul 13, 2009
I am working on a multi-form code. For some reason, this randomly began happening just about the time I finished my code. The intial form loads just fine, but when I go to click on any of the selected buttons, the code crashes. and I get an unhandled exception of type 'System.stackoverflowexception' occured. Does anyone have any ideas? I have checked for any subs calling subs that call subs and I don't have anything of that nature. It is breaking at the point that is bolded and underlined.
Public Class Add_Description
Inherits System.Windows.Forms.Form
#Region " Windows Form Designer generated code "
[code]....
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Feb 26, 2012
I'm a beginner to Visual Basic. In here I want to recreate a piggy bank which tells me how much money do I have. I created a function but the program tells me :
[Code]...
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Aug 16, 2011
I have written a function to generate a random string with specified length. In that I have used 'Random' function. when I have executed it, it is throwing an unhandled exception.Please suggest me some solution. Below is the code I have used:
[code]...
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May 10, 2011
I have recently updated a legacy compact framework application to support Windows Mobile 6.5 but after going through my backwards compatability testing I have an issue with the WinCE 5 device.When attempting to run the application from both the EXE and the debugger I get the "An unhandled exception of type 'System.TypeLoadException' occurred in Unknown Module." exception but its not giving me any idea which dll / type it has issue with.The changes do work on the Windows Mobile 6.5 Motorola device and the Pocket PC 2003 Psion Device but not on the WinCE5 Psion device.Does anyone have any ideas how I can find out which reference is causing me the issue. I have tried removing the new references to the Symbol barcoding and imaging libraries but I am still getting the same error.OK, it looks like the .Net Compact Framework installation had corrupted some how. I flattened the device, reinstalled and everything appears to be working.
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Jul 13, 2009
I am working on a multi-form code. For some reason, this randomly began happening just about the time I finished my code. The intial form loads just fine, but when I go to click on any of the selected buttons, the code crashes. and I get an unhandled exception of type 'System.stackoverflowexception' occured. I have checked for any subs calling subs that call subs and I don't have anything of that nature. It is breaking at the point that is bolded and underlined.
[Code]...
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Nov 9, 2009
Dll libray with VC++
.h file
__declspec (dllexport) unsigned long QueryUser(const wchar_t* AccountName,
wchar_t FullUserName[100],
[code]....
an error : An unhandled exception of type 'System.ExecutionEngineException' occurred in TestLib.exe
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Jan 28, 2010
I have problem in calling DLL file in VB.Net that I had Created it in C++... it give me this error message: "An unhandled exception of type 'System.EntryPointNotFoundException' occurred in test_dll_1.exe. Additional information: Unable to find an entry point named 'add_1' in DLL 't1.dll'."
This is my code in C++ (header file)
[CODE]............
The one in the main
#include "header_1.h"
double add_1(double a, double b){
return (a+b);
[CODE].....................
This code only for creating dll and I did created it correctly and i had tested it in c++ and it did works.... but in the Vb.net I had no luck with it...This is the code that I wrote it in the VB.net
Imports System.Runtime.InteropServices
Public Class Form1
<DllImport("t1.dll")> Public Shared Function add_1(ByVal a1 As Double, ByVal a2 As Double) As Double
End Function
[CODE].....................
And, I did put the .dll file in the bin folder, but also with no luck...
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Aug 19, 2010
program supost to control (projector - done..., webcam - idk how do i read FPS of the camera ..., arduino - will take me 5 min...)
here is the code of form1:
[code]...
it chrashes here is the error : An unhandled exception of type 'System.StackOverflowException' occurred in Unknown Module.
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Sep 8, 2009
System.ExecutionEngineException was unhandled Message: An unhandled exception of type 'System.ExecutionEngineException' occurred in Unknown Module.There are no further details and the stack trace window is blank I was just wondering how it would be best to work out where this error message is happening - i really don't want to put a million debug.prints in there to work out what functions were last called etc.
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Apr 14, 2011
An unhandled exception of type 'System.StackOverflowException' occurred in System.Windows.Forms.dll it also says make sure you do not have infinate loop or infinate recursion il give all code in order that they are executed in Check the chechbox and it disables all irelevent stuff and populates the combobox
Private Sub CheckBox_Spray_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox_Spray.CheckedChanged
If Me.CheckBox_Spray.Checked = True Then
[code]....
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Jun 4, 2009
An unhandled exception of type 'System.Runtime.InteropServices.COMException' occurred in STUB_CREATOR.exe Additional information: Exception from HRESULT: 0x800A0036 (CTL_E_BADFILEMODE)
This is the line that creates the error
Dim f As New Scripting.FileSystemObject
starter = f.OpenTextFile(stub_path.Text + "" + cpp_file, Scripting.IOMode.ForWriting)
I have just previously opened the file for writing. but however i have closed the textstream with which i was writing into the file.
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Apr 1, 2011
I'm getting a 'NullReferenceException was unhandled' exception when a NumericUpDown control is cycled too quickly. To slow it down I've disabled the (NUD) control and set a 200 Interval Timer to re-enable it, but the exception is still happening.I don't want the slow the control down any further, I'd rather try to handle the exception, but can't find any help on how to do that.This is essentially the code which is incurring the exception, at the (4th) line... Dim p... : -
For b = 0 To 8
z = Pic(b)
[code]....
I figure I need to ensure each image is happily installed in it's 'Box before I try to load the next one, or it may be that I just need to check that the last one is 'in' before I call the next bit of code (which calls this bit again if I'm too fast) It all works perfectly well if I don't go too fast.
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Jun 22, 2011
System.NullReferenceException was unhandled
Message=Object reference not set to an instance of an object.
Source=Image Invoice Management
[Code]......
i do understand that the list count is 0 so shouldn't it be declairing Start_Pos = 0
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Jan 23, 2012
i have a code that grabs an image from a site, this works fine and it does get the image fine, but every now and again my internet runs slow and it takes a while for the image to pop up thus causing the error:[code]How would i make it display the msgbox if it returns NullReferenceException error ?
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Sep 27, 2011
i have a small problem with my code that only happens every now and again.Im using multi threading on this and every now and again i get this error: System.NullReferenceException was unhandled Message="Object reference not set to an instance of an object."
Some times the program completes perfect with no errors and sometimes i get the above error.When i get the error there is always 1 item left in the list but when it completes perfect no items are left.Again this error does not appear every time, only every now and again. For example i had to run my program like 20 time to get this error, 19 times it worked perfect with no errors and 1 time with this error.
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