DataGridView Editing - Error - Operation Is Not Valid Because It Results In A Reentrant Call To The SetCurrentCellAddressCore Function?
May 12, 2009
I have a datagrid with a lot of column, but only a few group of it can be edited by user.On a CellEndEdit event i update automatically the database with the new value when the user modify one cell and then I must recharge the dataset of the dataview.If I modify a cell and then use tab or enter to move to the next one everithing is ok, but if I change a cell and then mouse_click on another one i get thi error when i recharge the dataset:
Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore function
What I am trying to achieve is if there is an error in cell 1 of the current row it returns to that cell. The code below tries to achieve that, but I get an error message thus:Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore function.
Private Sub RoomPricingDGV_CellEnter(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles RoomPricingDGV.CellEnter If e.ColumnIndex = 2 And cellerror = True Then
I've searched the Internet and found this to be a common problem, but couldn't find an example like mine, so didn't manage to find a solution that works.I have a DGV where the columns are added at design time and the rows are added programmatically using a simple loop. Here it is:
vb For Each iRow In iDS.Tables(0).Rows If iRow("rIndex").ToString = rIndex.ToString Then myDataGrid.Rows.Insert(count) myDataGrid.Item(0, count).ReadOnly = True
I am having a problem that I keep getting the following error when I try to run my program.I am trying to make a circle the size of the value of FrameSize.A first chance exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll
This is the details of the error:
System.InvalidOperationException was unhandled
Message=An error occurred creating the form. See Exception.InnerException for details. The error is: Cross-thread operation not valid: Control '' accessed from a thread other than the thread it was created on. Source=DreamCatcher[code]......
I'm doing my first multithread attempt and I get an error that says "Cross-thread operation not valid..."
Code: Private Sub btnProcess_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnProcess.Click Dim thrMyThread As New System.Threading.Thread( _ AddressOf displayProgress) thrMyThread.Start() [Code] .....
cross thread operation is not valid. error is coming?I have two buttons one for showing the panel of split container and another for hide.The error is coming in do work event but only for hiding the panel of split container?
VS-2010 i have an application that works great from the visual studio ide on x86 systems(projects build x86) but when i try to run the app from visual studio on my x64 system i get "Cross-thread operation not valid: Control 'gridHistory' accessed from a thread other than the thread it was created on."
main line 58 and 59 are below dim listform as flist = new flist Application.Run(listForm)
I googled about this error, i found that you need a delegate to go around it, but I dont understand. Here's a Screenshot. Do I need to attach my code too?
I am trying to convert a DLL function call which has the Callback function routine called within the DLL function call.The DLL function call signature is like this:
In one application, I need use 4 simultaneous threads.When the threads finished, I need to update the text of a TextBox.So, I create 4 Textbox, and I wanna the threads change the text to FINISHED.Each thread change one distinct TB.I use this "example"
Dim Terminados As Integer = 0 Private Sub frmEnviarMensagem_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Timer1.Enabled = True Timer1.Start()
[code]....
The problem is, I have an error in the red lines.The error is: INVALIDOPERATIONEXCEPTION "Cross-Thread operation not valid: Control tbPlaca1 Accessed from a thread other than the thread it was created on."I don't use cross threading. Each TB only was accessed for the correspondent thread, and for the "main program".
When my client try to connect to server I'm getting this error : Cross-thread operation not valid: Control 'l_users' accessed from a thread other than the thread it was created on.
Private Sub _socketManager_onConnectionAccept(ByVal SocketID As String) Handles _socketManager.onConnectionAccept l_Users.Items.Add(SocketID) End Sub
I am a excel vba developer, and all public functions i would put in the module. I assumed by creating a .vb rather then a module i can put all functions i use regulary throughout forms in this.however i get the error on this code
Function CopyFile(ByVal x As Integer) As String Dim FileToCopy As String Dim NewCopy As String
I am just trying to call a little error check function, and if the return value, isOK, is false, let the user change stuff and then call the function again. If isOK is true, the rest of the program runs. For some reason, when i run the test under conditions I know to be valid, or true, the function still returns isOK = false.
I'm using VB6 and trying to get an instance of a Type Library object.After i retrieved the object and i'm trying to invoke a method. I'm getting this exception. However, i've checked with the parameters and its type. it is correct.I found something fishy, that method doesnt have return value. But it is throwing a compiler error whenever i'm trying to call the function and the compiler error went off when i get a return value from that method.I don't know,
I have a Windows form Application that I am creating, could also be a Windows Service that I need to run.There are basically 2 Classes that were converted from java to vb.net and 1 xml file to this. for testing purposes I would like to use the Button.click event to manually run the code.However i get an error when trying to call the sub/function the normal way.I even tried to put this classes information in the Public Class Form1 but it keeps on giving me errors.This is the Sub:
Shared Sub Main(ByVal args() As String)
so how do I call it from a Button.click event?
normally i would just do a "call main()" and it works however this time it is not because of the (byVal args() as string)
i have an error when im using a function in dll. i declare this( "Private Declare Function SetChannel Lib "StreamReader.dll" (ByVal freq As Long, ByVal smyb As Long, ByVal pol As Long, ByVal fec As Long, ByVal lof1 As Long, ByVal lof2 As Long, ByVal lofsw As Long) As Boolean") [Code]
this is that error"A call to PInvoke function 'skynet!WindowsApplication1.Form1::SetChannel' has unbalanced the stack. This is likely because the managed PInvoke signature does not match the unmanaged target signature. Check that the calling convention and parameters of the PInvoke signature match the target unmanaged signature.".
I'm trying to rename some image files....pretty straight forward it seems. However, I keep getting the message "Procedure call or argument is not valid"[code]...
I have a "working" program for a Vigene cipher, but I am having an issue that I can't pinpoint. Anytime an accent mark is used in the plain text i get a "Procedure call or argument is not valid" error. So trying to encrypt "Vigene cipher" for example will not work. Using the plaintext "f" with the keyword set as "b" the output is Decryption handles these characters just fine. The following code is my encryption sub:
Private Sub btnEncrypt_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEncrypt.Click Dim Key As String = txtKey.Text 'makes the password
I know if I use String.Split on "Alpha Beta", with the space character as the separator, I will get "Alpha" "Beta". My question is, how do I then handle "Alpha" and "Beta" as separate strings in future code?
I've got a datagridview which generates rows dynamically. Each cell in each of the columns contains the same type of data and runs through the same code so if one cell reports an error, then they all should. But For some reason the exact same cell (5th row down, 5th column across) gives the following error if I click on it.
Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore function.
The column of the cell in question is editable and contains a dropdowntool while it is in edit mode.
I am developing a application called filecopy(windows application). Inside the form1.vb i am having progressbar. Having one more class called FileCopy. inside the filecopy class i have DirectoryCopy method. it invoke the percentage calculation method(that is in form1.vb) for how many percentage is completed. Each and every time the value. Finally , the percentage value is assign to progressbar.value. AT that thime i am getting cross thread operation is not valid exectption. This is my code;
I may need to give you more info but I am not sure what! I have been using a print queue dll with good results but all of a sudden when I add label and try during the job added event to change the text value of this label I get a threading error!
"Cross-thread operation not valid: Control 'lblPagesT' accessed from a thread other than the thread it was created on."
Where can I go to learn about threading, why does it think its a seperate thread? is it cause its coming from the dll?
Private Sub pmon_JobAdded(ByVal sender As Object, ByVal e As PrinterQueueWatch.PrintJobEventArgs) Handles pmon.JobAdded System.Threading.Thread.Sleep(1000)
In response to a "Cross-thread operation not valid: Control 'RecordAddedTextBox' accessed from a thread other than the one it was created on." error I have added a routine obtained from Microsoft Help and that is giving me a compile error. This is my original
i am working in vb.net 2005 i have more than 10 vb forms and each form has number of textboxes, and maskedtextboxes, so i have to validate them all. i am using this way that on keypress event of textbox i use this code
[code]...
but this is very lengthy code, i mean that on each form i have almost 15 to 20 textboxes, and if i use the same code on each's textbox keypress event so it will be very very lengthy code. so please assist me that how i solve this problem? and how do i use the shortest code?