C# - .Net - Unable To Set The Next Statement To This Location. The Attempt To Unwind The Callstack Failed
Jan 5, 2010
While answering this question I noticed that I got the following dialog while atempting to move the "cursor" while an exception was being handled:
Unable to set the next statement to this location. The attempt to unwind the callstack failed.
Unwinding is not possible in the following scenarios:
Debugging was started via Just-In-Time debugging.
An unwind is in progress
A System.StackOverflowException or System.Threading.ThreadAbortException exception has been thrown.
Whenever I run my service it never responds, I know it isn't the service as I have one similar running in a different aspx file running. I've looked into it and it's something to do with the web.config file but I don't know where. I was given a small web config file however when you put it in the place it says it doesn't like one specific line of coding in it. This is the error I am getting:
This overload resolution failed error that occurs when I try to add the newly created integer array as an item in a generic linked list as per the following?
Imports System.Collections.Generic Public Class GraphData Dim mInput As Byte() Public Data() As Integer Dim SignalData As New LinkedList(Of Integer)(Data) Private Sub Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint [Code] .....
I'm trying to connect a remote mysql database. I'm doing it from a vb.net 2005 application with a connector mysql.data.dll What's happening is, suppose if I try to connect thrice it connects twice and once throwing an exception that says A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. there's nothing wrong with the code, otherwise it would never have connected
I have two debugging issues and I'm not sure what I did to make them occur:
1) I get an "Unable to set the next statement to this location" error when I try to set a new line.
2) Some of my objects don't return their member variable values. I get a "Cannot evaluate expression because we are stopped in a place where garbage collection is impossible, possibly because the code of the current method may be optimized" error when I hover over them or try to expand the object into tree mode.
These two problems must be related. I did a lot of searching about managed code and just-in time debugging but nothing I tried did the trick (even unmanaged code had these errors).
edit: After some more research it seems that #1 only occurs in one specific function (naturally, a very important and large one). This function is located in a module. Problem #2 occurs in all areas of my project.
I'm using Visual Studio 2005 Team System For Software Developers. When I try to add a new DataSet to any kind of project, I cannot get to the visual DataSet designer. Rather, I get the following error (all the time no matter what the type project actually is - Windows app, Web site, etc.): The custom tool 'MSDataSetGenerator' failed. Unable to convert input xml file content to a DataSet. Data at the root level is invalid. Line 1, position 1.
The button has code which works and deletes a record in a database:
======================================= Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
[code]....
I can put similar code into the toolbar button just changing the Button5_Click to the name of the toolbar button but I thought it would be better if I 'called' the already written code.
I changed the Private Sub Button5_Click etc. to Public Sub Button5_Click then in the Toolbar button click event I put 'call Sub Button5_Click()'
I get errors stating that ' argument not specified for parameter 'e' ' and can't progress.
I will be using this code in a few other forms so would like to 'call' possible.
I was dabbling in pure Word VBA here and it occured to me that mixing the 'Set'-lessness of .NET with VBA might be confusing to programmers doing .NET Automation. Beyond that, the ambiguity example for Set here (near the bottom of the page) didn't seem to apply to the reason I had to correct the OPs code to include it. Further amusement came from reading some comments by one of the architects of VB here.
I have the following at runtime I receive the error - Violation of PRIMARY KEY constraint 'PK_TBLPracExclude'. Cannot insert duplicate key in object 'dbo.TblPracExclude'. The statement has been terminated.
Dim Prac_Read As New System.Data.SqlClient.SqlCommand(("Select prac_no As chk_prac_no From dbo.TblPracExclude"), conn) Try
Im trying to check service on a remote server.. as i was typing this i kept getting a syntax error on AndAlso statement.
Also, how do i add the path to connect to a remote server to check the service?
Private Sub CheckServiceButton_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckServiceButton.Click ' This will check if the service is running '
my form displays locations and owners for a same product, the forms have a data grid view that actually takes in the details of the location and owner of that particular product. a product can have multiple owners and locations once its manufactured over time, the forms actually display this all i need is some kind of business logic that can actually manage the historical events of the location and the owner that when a user actually goes in and adds a new entry, the end date of the previous owner gets reduced to one less than the start date of the new owner. this in formation is stored in business layers called the owner collection and the location collection, i am not able to actually inherit or call the location or the owner collection class in the classes.
I have problem with select case statement. When I click the button, nothing have happens.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim google As String Select Case google Case 0
i'm having troubles with a linq-to-sql statement and getting a left outer join to work. here is a sample of two tables i'm trying to join and my code that i've wrote.
Table1 Table2 f1 f2 f3 f4 fID f1 f2 f3 f4 val1 val2 val3 val4 1 val1 val2 val3 val4
[code]....
Instead I'm returning ALL values from table 1. I need to return all values from the left outer join where tbl2.fID is null.
I'm using Visual Basic Express 2010 and SQL Express 2008 in Windows XP. At first I couldn't add a datasource (the .mdf file for the database) because of a "Operating system error 32" which I seemed to have resolved by giving myself full permissions for .mdf file (by right clicking on the file and going into properties and then Security) and restarting the SQL SERVER (SQLEXPRESS) service. The dataset for the database is in my solution explorer but when I right click on a table adapter to add a query and attempt to open up the query builder, I get the error in the title above.
I'm using Visual Basic Express 2010 and SQL Express 2008 in Windows XP.I created a database on my local PC HDD. At first I couldn't add a datasource (the .mdf file for the database) because of a "Operating system error 32" which I seemed to have resolved by giving myself full permissions for .mdf file (by right clicking on the file and going into properties and then Security) and restarting the SQL SERVER (SQLEXPRESS) service.The dataset for the database is in my solution explorer but when I right click on a table adapter to add a query and attempt to open up the query builder, I get the error in the title above.
I created a typed dataset a day or so ago, then I added a whole bunch of tableadapter/tables with some relationships etc... suddenly out of nowhere it decides my dataset "is not defined". everywhere in my code where i use this dataset now has an error. I tried not to pull out my hair and do a Clean then Rebuild solution... out of nowhere it just refuses to generate code. Object reference not set to an instance of an Object. It would be nice if it was my object so i could find it but it's not.
Curiously I also lost the little database icon on the dataset in the solution explorer.I can still open it in the designer and preview my queries etc... it just wont make the code. it's driving me insane. anyone got a solution?
I have written a code to take complaints and give that complaint a number automatically. For that i have created a "fno" named variable in settings.but somehow i cant change the value of it and i get this error "Attempt to access protected memory"
When i run the debugging tool for visual basic my computer crashes (Blue screen). it's rather constant with the VB forms, even ones without code at all... Any help on the matter? All the forms were originally built on this computer but don't work any more, they however work fine on other computers so it has to be my computer.
Exceptions can have different degrees of impact on a program. For example a program should probably abort if OutOfMemoryException is raised, but it is possible to safely and appropriately handle System.Data.SqlClient.SqlException without putting the program in an unknown state.
I do understand that any exception has the potential to put the program in an unstable state if it is not properly handled. Are there exceptions that should never be handled beyond simply logging and throwing up the stack?
When I run the program with maximum attempt of 3 with correct username and password, Illegal user will pop up,,,i really dont know what to do.illegal user must be pop up when i already attempt " try again " then another "3attempt" then the username or password are wrong.[code]
I've been trying to follow the examples I've found online and, well, I can't really get my head around what I've done wrong.So, I have a simple piece of code to search for a machine in AD, as so. [code]
i have made application in vb.net which access the MFC Regular dll and it works fine if i run application from windows xp but when i run same dll from windows 7, it gives me above error.
why is the datareader closed? I had to change this from a stored procedure to dynamic because our IT guy was encountering trouble changing the sp permissions.. so there's definitely a time factor
Dim cmd3 As New SqlCommand cmd3.Connection = connect Dim dr2 As SqlDataReader
In a nutshell...I have developed a site in ASP.Net and VB.Net which allows a user to create an order and submit it to a SQL Server backend database.
When the order is placed...an xml file is also produced, showing the items that have been ordered...which is then loaded in to a program to update stock quantities.
The code I have is as follows:
Public Sub butSubmitOrder_Click(sender As Object, e As EventArgs) Handles butSubmitOrder.Click Dim sqlConn As New SqlConnection
I am not sure why this code doesn't work. I have follow according to the table field data and it I am still unable to get the SQL Datareader to work. I have checked the tables and all datafields, everything is correct. But I still am unable to read data from the database.
Dim connectionString = ConfigurationManager.ConnectionStrings("CleanOneConnectionString").ConnectionString Dim myConn As New SqlConnection(connectionString) myConn.Open() Dim cmd = "Select * from [Member] where Email = @Email" Dim myCmd As New SqlCommand(cmd, myConn) [Code] .....
I have a strange problem in my VB.NET project when I want to compile it as x64. If I set the target CPU to Any CPU, it will be fine and on x64 systems it will run as x64. But if I set the target CPU to only x64, my project will show up some error/warnings and won't compile at all, here are them:
Error 1 : An attempt was made to load an assembly with an incorrect format Warning 2 : Possible problem detected while building assembly 'x': Referenced assembly 'mscorlib.dll' targets a different processor Warning 3 : Possible problem detected while building assembly 'x': Referenced assembly 'System.Data.dll' targets a different processor Warning 4 : Possible problem detected while building assembly 'x': Referenced assembly 'System.EnterpriseServices.dll' targets a different processor
This is very strange, those are system assemblies and my project is .NET Framework 2.0. How they can run when my application is set to any CPU but not at x64 only?!
Invalid attempt to call Read when reader is closed and sometimes Invalid attempt to call MetaData when reader is closed when attempting to read from a sqldatareader object. What I want is to list groups in listview. The last column is "Total Numbers".[code]...
It works ok for the first row but after that the first error generates. I don't want to include the COUNT function in the main sql cos then i would be required to group the rest fields (there are 9 of them totally). I tried MARS but it don't work at all in my connection which is like
"Invalid attempt to call Read when reader is closed." is returned when trying to use a SqlDataReader in a Thread or BackgroundWorker (Do While z.rdr.Read() in the bold sections - I know this code does the same thing twice....). I have looked at a few forum posts but I did not find a method to keep the SqlDataReader open when passing the arguments. How do I thread the SqlDataReader loop?
