Can't Remove Row In Datagrid On Event RowValidating
Mar 6, 2010Can't Remove Row in datagrid on event RowValidating
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Remove Event Handler For Datagrid Cell Validating
Dec 16, 2009I am having a problem with the cellvalidating event constantly firing when the datagrid is refreshed (since the trigger that fires the event is the originally selected cell losing focus).I would like to remove the event handler for this at certain points of my code so that it does not fire but the examples I have come across on MSDN don't appear to do anything, so I guess I must be doing something wrong.[code]
View 1 RepliesDataGridView's RowValidating Event Fires Differently When Closing A Modal Vs NonModal Form
Mar 24, 2011Based on our tests primarily done in VB.NET in VS2010 it seems that when you close a WinForm the "RowValidating" event of the DataGridView on that form behaves differently depending on whether the form is MODAL or NON-MODAL. What we did was open the form (MODAL and NONMODAL) and changed a value of a cell and then immediately clicked the "X" to close the form. It looks like the "RowValidating" event DOESN'T fire if the grid is on a MODAL form but it DOES fire when the grid is on a NON-MODAL form. We can't figure out why that is... Is this a known bug in .NET?
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RowValidating Throws Exception?
May 6, 2012I use DataGridView in my project. Everything worked fine until I added some code in the RowValidating event. During the form_load event exception is thrown on the statement that set the datasource of the DataGridView.The project uses bindingsource for the datasource of the DataGridView. My validating code is shown below:
Dim currentRow As DataGridViewRow = Me.dgExpenditure.Rows(e.RowIndex)
Dim incexpCell As DataGridViewCell = currentRow.Cells(0)
If Not Me.closingBoolean Then
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Using DataGridView RowValidating To Update Cells?
Aug 16, 2011I want my users to enter some data into a bound DataGridView (dgv) and when done to have the program fill in some columns (hidden key) and to populate some cells in the same row according to the data entered - like max of several cells.
Can I use DataGridView RowValidating to update cells? Or is it just a Cancel or not issue?
What would be the correct way for me to fill in hidden key information and to calculate some cell values?
VS 2010 DataGridView And RowValidating And Escape Delete Error
Feb 24, 2012I have a bounded datagridview and have some code in row validating event. When i add a new line by writing something in one of the cells of the new row, and if in the middle of the process i wish to cancel this new row, if i use the escape key i get an exception, something like, Index (number of the removed row) does not have a value. After the exception the exception the row it's removed...
How can i make the row validating to work correctly?I have this code in the start of rowValidating
vb.net If MyDataGridView.Rows(e.RowIndex) IsNot Nothing AndAlso Not MyDataGridView.Rows(e.RowIndex).IsNewRow Then
End If
Error: How To Undo Remove In Datagrid
Feb 5, 2010I have two tables with referential integrity defined in the sql-database. parent: projectschild: projectlineI do not want projects to be deleted if projectlines exist.The projects are displayed in a datagridview.Here's part of the
Dim dbs As New databasedata.databasedata
Dim connstring As String = dbs.DatabaseConnection
Private dc As New DB2Linq.db2linqDataContext(connstring)
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Remove Multiple Rows In Datagrid?
Jun 12, 2009I have the following code in which it supposed to remove rows that have the first column checkboxes checked, but it only removes one row at a time.If you have more than one checkbox checked, you have to click the command button each time to remove the row.It seems that the logic is correct to remove multiple rows if more than one checkbox is checked, but it doesn't work.
Public Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
For Each row As DataGridViewRow In DataGridView1.Rows
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Remove One Event That May Be Exactly Like The Others?
Dec 14, 2011I'm creating a system in VB.net that utilizes Lua via the LuaInterface.
To associate an event in Lua with a function, I can simply do this:
RegisterEvent("tick", function(nt)
if not lcc then return end
if nt>=tt then
[Code]....
how I should change my RegisterEvent Function/Sub and how I should make the DisconnectEvent.
I know this is kind of annoying to try and understand what I'm trying to say. Feel free to post a comment asking for clarification. I'll be more than willing to try and explain it to the best of my abilities. If the LuaInterface has some kind of native way of handling this, I'm open to that as well :)
Remove All Event Handlers In One Go?
Jul 19, 2009Problem: I have a document class which contains a list of objects. These objects raise events such as SolutionExpired, DisplayExpired etc. The document needs to respond to this.
Documents can sometimes exchange objects, but a single object should never be 'part' of more than one document.
My document class contains a bunch of methods which serve as event handlers. Whenever an object enters the document, I use AddHandler to set up the events, and whenever an object is removed from the document I use RemoveHandler to undo the damage. However, there are cases where it's difficult to make sure all the steps are properly taken and I might thus end up with rogue event handlers.
Remove An Event Sub And Then Restore It?
Mar 4, 2011I have a DataGridView and sometimes I use the CellValueChanged Event but othertime I don't want it to trigger. Is there a way that I can remove an event sub and then restore it. I have 5 columns with a ComboBox. After licking one, and then another, the line bellow keeps repeating until stack crashes
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Does Clear Remove Event Handler
Oct 2, 2011Some controls are dynamically created within a panel. Their event handlers are attached
Dim btn as new system.windows.forms.button
with btn
'set properties
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Dynamically Add / Remove Event Handler?
Nov 23, 2010I have a TableGridLayout (6 x 6) which host 36 buttons created at design time.From the 36 buttons, only a handfull maybe needed at anyone time depending on data retrieved from an SQL database.Everytime I need to 'clear' the grid to populate with new items, I clear the text of each button, make it visable if required and then upadate with the new text.On every pass if a button becomes active, I add an event handler to the button like this.[code]...
View 4 RepliesExplicit Add / Remove For Event In Program?
Jan 10, 2011In C# you can define explicit add/remove code when an event is subscribed/unsubscribed.
Is this possible in VB.net?
Remove Only One Specific Event Handler In .net?
Dec 13, 2011I'm writing a small 2D engine that uses Lua to control it. I've been setting events up in between the Lua and the VB.net for the past little while here. The problem, I've realized, is that is that I can't seem to remove the events which is screwing up quite a few things (because they are being called when they should be done with). To fix this, I wanted to add some kind of way to remove the specific event handler.
I know how to add an event handler:AddHandler Button1.Click, AddressOf Button1Clicked
But with this in mind, is their a way to remove a specific event handler in the VB.net? I didn't explain this very well: If I have this:
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VS 2010 Remove Event Handler?
Apr 1, 2011I have a Timers.Timer called COMTimeout, to which I add an event handler using:
AddHandler COMTimeout.Elapsed, AddressOf TimeoutEvent
however, the handler may also be:
AddHandler COMTimeout.Elapsed, AddressOf SecondTimeoutEvent
I now need to remove the handler, is there a way to do it without knowing the name or do I need to keep track of which handler as been assigned?
Winforms - Remove An Event Handler?
Jun 20, 2012VB.NET RemoveHandler & Anonymous Methods
If I add an event handler like this:
AddHandler s.Click, AddressOf Panel1_Click
How can I can then remove the event handler?
Private Sub Panel1_click(ByVal sender As Object, ByVal e As System.EventArgs)
' Remove code
End Sub
Add And Remove Datagridview With Button Click Event
Feb 27, 2012I want to add and remove Datagridview in VB.NET with button click event. Can it be possible.
View 2 RepliesPossible To Remove A Character From Textbox When Backspace Event Happens?
Nov 8, 2009[code]The RichTextBox's text would act as if the user pressed backspace while typing in the TextBox.How is it possible to remove a character from the textbox when the backspace event happens?
View 2 RepliesForms :: Tabcontrol1.tabpages.remove Not Working In A Particular Event)?
Jun 15, 2010I have an event called "worksheet_selectionchanged" which occurs when a range/cell is selected in an excle file.When the event is triggered, all the tabpages in a tabcontrol should be removed.The code is given below:
Private Sub myWorksheet_SelectionChange(ByVal Target As Excel.Range) Handles myWorksheet.SelectionChange
for each tabpagesToRemove as TabPage in tabcontrol1.tabpages
tabcontrol1.tabpages.remove(tabpagesToRemove)
[code]....
but when ever i select a cell in the excel file, the tabpages seems to be "not removed".
Remove All Eventhandler From Specific Event Of Control During Runtime?
Dec 29, 2009I do have a customized treeview which inherits from treeview. The customized treeview offers - amongst other - the functionality to automatically check/uncheck the child and parent nodes according to the selected node.To do so, I use (or mabye abuse?) the AfterCheck-event of the treeview in the class where the inherited treeview is customized. Code looks like that (Submethods not included):
[code]...
I temporarily remove the AfterCheck-Event in the event-procedure to avoid it getting fired when I programmatically check/uncheck the checkboxes of the treeview. Works fine so far, only problem I see: if another programmer wants to use the customized tree view and tries to make use of the After-Check-Event, he'll get caught in an infinit loop, because his own After-Check-Event (he added himself to the treeview) was not removed and keeps on firing every time a checkbox is automatically checked/unchecked.
How can I remove ALL methods linked to AfterCheck-Event without knowing which method someone added to the treeview-control? My guess is to use reflection and to get the underlying delegate of the AfterCheck-Event by using the .GetInvocationList somehow - but I was not able to make it work.
Feraud
Remove Beep Sound When KeyDown Event Is Executed
Apr 14, 2009How do I remove beep sound that comes with "KeyDown" event. When I press enter after I input a employee Id in the text box, there is beep sound. Private Sub TxtEmpName_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TxtEmpName.KeyDown
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VS 2005 - DataGrid - Click Event
Apr 13, 2009I have a dataGridView in my program that displays stuff I have a method that is called when the user click one of the rows in the grid. I want to write in code a line that will trigger as if a user clicked one of the rows. I know is has something to do with XXXXX.click().
View 4 RepliesCreated Button In DataGrid - Event Handlers?
Nov 15, 2011I created a button in DatarGrid. Now I want to click that button and only when I click the button should the event be fired. Actually I want to Delete that particular row once the button is clicked. However, when I click the button, the Event: CellContentClick of the DataGrid gets fired. And that means if you click anywhere on the Datagrid, that even will be fired, and that makes no sense to put a Delete button. So I want to keep the Delete button and once the Delete button event gets fired, the record gets deleted.
View 3 RepliesHow To Get A Datarow From Datagrid On Mouse Leave Event
Aug 26, 2010i have a datagridview with records, when i select a row in datagrid i need to display the values in a textbox. please help me with sample code
View 3 RepliesMake Column Of Datagrid Keypress Event?
Aug 1, 2010My question is how can I create an event that would catch an enter key when I am editing it. Like I would type a note and hit enter key when I finish. Because columns of the datagrid does not have events like other controls or datagrid itself. What I need is something like this:
Private Sub ColumnNote_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles ColumnNote.KeyPress
End Sub
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Use The TextBox KeyDown Event To Go Up And Down The Rows DataGrid?
Aug 25, 2011I put a form to Person Search.
Search for a name is entered into the TextBox,The results are displayed within the Data Grid
All information, data grid is 100 records
Now I want to go up and down keys to move between records
While my focus is Text Box
Write Keypress Event In The Cells Of DataGrid ?
Feb 3, 2010tell way to get: KEYPRESS event in the cells of DataGrid ?If user enters numeric value in Quantity, it would calculate & give result in Rate.How can I fire KEYPRESS event in cell
View 3 RepliesDatagrid - .Net Event Handler Registration For Nested Linkbutton?
Nov 24, 2009I have a linkbutton that is nested in a datagrid that is nested in a datalist (yes, very strange, but unfortunately it's part of the site which I cannot change). Essentially I want the linkbutton to fire an event handler that calls Response.Redirect(e.CommandArgument)). In other words, I already have the URL that I want to redirect to, but I can't figure out how to get the event to trigger when I click on the linkbutton.
I have tried using the linkbutton OnClick events and the ItemCommand events for the datagrid but I dont think I am registering them correctly.
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This is my latest attempt where I am trying to get the datagrids ItemCommand to fire when the client clicks on the link, but it's not working at the moment.Failing this, is there an easier way to redirect the client to the correct page when they click on the linkbutton? I tried using the OnPostBackURL but the issue is that there are objects that need to be carried over that dont seem to be when I do this or when I just use a hyperlink with navigateurl set.
Event Handler - Catch The Textbox Control In The Datagrid?
Oct 5, 2010Is there any way to catch the textbox control in the datagrid? like catching its keypress event?
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