Pass Cell Location Of DataGridView To An Event Handler Via A ContextMenu?

Nov 20, 2009

I have a context menu which is shown over a DataGridView as follows below. The Context menu is shown if the mouse up occurs over the second column of the DataGridView. I also have a bunch of event handlers set up for each item in the context menu. I now want to pass the location of the cell in the datagridview to the event handlers.Do I have to pass the NewPoint() to a public variable and then translate that into a cell location within the event handler?

Private Sub DataGridView14_MouseUp(ByVal sender As Object, ByVal e As MouseEventArgs) Handles DataGridView14.MouseUp
Dim hitTestInfo As DataGridView.HitTestInfo

[code].....

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Asp.net - Pass Two Parameter To Event Handler

Jun 13, 2011

i struggling to pass two parameter to an event handler basically when the page is load it dynamically create some control lable, textfield, and linkbutton when i click on the link button it fire an event handler, here is my problem i want to pass first the Product ID and quantity, the product id is fetch from the database passit thorugh an object where as the quantity it enter by the user first part of the code it connect to database loop through and display all record on the page dynamcally

[Code]....

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Pass Values To Event Handler?

Nov 1, 2008

I have a function that creates a button and textbox on my form dynamically. That all works fine, but now I need to pass values to my click event.[code]...

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Remove Event Handler For Datagrid Cell Validating

Dec 16, 2009

I 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]

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.net - Event Handler Is Never Called Because The Original Event Is Raised In Another Event Handler?

Apr 18, 2011

The event handlers in my parent class are never called though the events are raised in the child class.

The Code:

Public Class childForm
Public Event checkboxchangedEvent(ByVal checkbox1 As Boolean, ByVal checkbox2 As Boolean)
Private Sub checkboxchanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged, CheckBox2.CheckedChanged

[code]....

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Get Screen Location Of RowHeader Cell In DataGridView

Apr 9, 2012

I have several DataGridView's that are located in several different containers. I want to display a small form in a precise location relative to the RowHeader when the user's mouse moves over the row header of the datagridview. How can I get the screen coordinates of the RowHeader? The code below does not display the form in the proper location. I want the top-left corner of the form to be displayed 15 points to the right of the Right property and 15 points below the Bottom property of the RowHeader.

[Code]...

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DataGridView CellContentClick Event Handler Not Being Invoked?

Sep 26, 2006

There is something strange going on in my VB 2005 program that I don't understand.. I have a form that has several tab pages. Each page has one or more DataGridView controls. When a user selects an item on one DataGridView , I want to deselect anything currently selected on any other DataGridView on that tab page. The only thing that should then be selected is the item I clicked on in the current DataGridView .

I created the following code (note there is a CellContentClick handler for each DataGridView control and there are DeselectAll... and RefreshAll... subroutines for each tab page).

It's fairly straightforward. But notice where I placed the XXX NOTE comment below. If I place a breakpoint there, run the program and click on various cells in various grids, and then click on the specified grid cell, I can create situations where the breakpoint is never reached! Thus, I don't turn off the selection in other grids.

How can this be? Is there some setting for DataGridView controls that I've inadvertently set incorrectly (without my listing them all here)? Or is there some bug in VB I'm unaware of? The "DeselectAll" subroutine merely iterates over all DataGridView controls in the current tab page (except for the current DataGridView) and calls ClearSelection on each such grid. RefreshAll calls Refresh on every DataGridView on the current tab page.

[Code]...

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Datagridview On Data Entry Event Handler?

Apr 16, 2012

If I wanted a character in a datagridviewcolumn replaced when it's typed, not when the cell is left, how could I achieve that? Is there an eventhandler tied to that?

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How To Link Cell Value At Specific Location In The Datagridview Table To Image Source

Jan 13, 2012

As I have no idea on how to retrieve access data at the specific location in the table, so I wrote VBA code t export the entire access database to a datagridview which is located in the form1. There's a column of datagridview contain complete address information of a image. I'm thinking a way to link image source (of form 2 or xaml file) to the the column so that the image will be displayed. is there any code to get cell value at the specific location in the table? In excel VBA, sheets("Sheetname").Cells(rownumber, columnnumber).value is used to get the cell value, but how about code for this case?

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Datagridview Cell Value - Get The Old Value Of The Cell In Event

Jan 28, 2011

In cellEndEdit event I need current cell editedFormatedvalue ( well it is done) now my question is can we get the old value of the cell in this event or have to handle some other event for this means let I have a cell in which current value is abc and when I edit it it become def now I want to get both the values in cell end edit event ( or any else ) but finally I have to perform task on cellendedit

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Button Click Event Handler For Checkbox In Datagridview And Textbox?

May 4, 2012

assistance.My Objective: create project that allows the end user to add data to a textbox then select desired rows via checkbox column in a datagridview. Once the end user has selected all desired rows for update then on button click commit data from textbox to cells belonging to the alert_notes column.

[Code]...

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Force A Commit On The Current Row From Within A Virtual Unbound DataGridView's Edit Control Event Handler?

Sep 8, 2011

Using the walkthrough from [URL], I implemented a DatagridView in virtual mode, totally unbound, in VB 10 Express (we are talking WinForms).

I understand that CommitEdit (DataGridViewDataErrorContexts.Commit) commits the current cell's contents to the data cache.

The example uses row-level commit, i.e. it pushes the values into a row buffer until the current row is left. Only then the row is added to (or updated in) the data store. That's exactly what I do, too.

Question -- how can I commit the current row programmatically without leaving it? (I want to commit the whole row, not just the current cell.)

If the user leaves the row, there is a RowValidating, RowValidated, RowEnter event sequence where the datastore update is taken care of. So one idea (currently my only one) was to simply re-set CurrentCell to Nothing, for example.

But I cannot just set the DataGridView's CurrentCell property to Nothing (or any cell outside of the current row) since I want to commit from within an event handler of a custom edit control created by a custom column, and I see an System.InvalidOperationException exception when setting CurrentCell there.

In fact, it is a tiny button right to a combo box, i.e. I create a DataGridViewComboBoxCell descendant which is a DataGridViewComboBoxColumn descendant's edit control. My special ComboBox cell adds a tiny button which should commit the current row. Unfortunately, that button's _Click event handler cannot change CurrentCell since DetachEditingControl throws the exception then.

Obviously, I must delay the CurrentCell re-assignment until the whole _Click event has been processed. Or what? How would I do that -- register a custom Windows message, SendMessage that one to me, and override the windows procedure of the form so it re-sets CurrentCell when this message is received? (Hello?)

There should be a rather easy way to let DataGridView commit all changes by firing the events that I handle to perform the datastore update, no?

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Firing An Event Handler From Within A Nother Event Handler?

Aug 27, 2011

How do I get a Event Handler to fire from within a nother Event Handler?

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Programmatically Change Foreground Color And Make Bold Text In Individual Cell Location On DataGridView Control?

May 5, 2010

How to programmatically change foreground color and make bold text in individual cell location on DataGridView control (Visual Basic)?

I use "dgMatrix.Rows(r).Cells(c).Value = x" to assign individual numeric values to individual cells in a DataGridView control. My question; is there a similar way to change foreground color and make bold the text in this cell, by specifying the individual row/column cell location?

For example; for cell (row 3, col 5) in the DataGridView make text in cell say red and bold or blue and bold so as to highlight and distinguish individual cell contents. As needed, I will also need to reset these properties (foreground back to automatic/black and font from bold back to regular); the reset could be done globally to the whole DataGridView as opposed to indiviaually by cell.

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Datagridview Cell Textchanged Event?

Apr 25, 2011

I was wondering if there's an easy way to make a cell textchanged event for a datagridview, like you have the textchanged event for textboxes, an event that gets triggered everytime the user press a letter/number/symbol/backspace/space, so i can check in that event if the datagridview has changes and whether i should enabled my save button to save the changes made.

Or is there a better way to check whether i need to enable my save button?

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Edit Specific Cell On Selected Row (contextmenu)?

Feb 24, 2012

I'm really struggling on how to select the value of a specific cell so I can edit it. Cell/Row is not readonly.[code]...

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.net - DataGridView Cell Click Event In VS 2010?

Jan 7, 2011

why the first code block below works, but the second code block does not? (Only thing I can see is the

Handles DataGridClaims
syntax
Block 1
Private Sub DataGridClaims_CellContentClick_1(ByVal sender As System.Object, ByVal e As

[code]....

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Add New Rows In Datagridview When Cell Leave Event?

Jun 2, 2011

I want to add a new rows when cell leave event occurs.It shows error like Operation can not be performed in this event handler...

here is my code,

If PatientDataGridView.CurrentCell.ColumnIndex = 2 Then
PatientDataGridView.Rows.Add()
End If

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Change The Value Of A Cell In DataGridView.CellValidating Event?

Sep 8, 2011

I handle the validation in the CellValidating event, and if the cell is invalid display an error message, then cancel the exit of edit mode. However I would also like to erase the content of the cell currently in edit mode.

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Create An On-KeyDown Event For A Datagridview Cell?

May 24, 2010

I'm using an on key down event for my datagridviewer that fires every time a key is pressed while the datagridviewer is selected(Focused).I want the same thing to happen while in a cell, but there is no event for key down in a cell.

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DataGridView - ReadOnly Cell KeyDown Event?

Nov 25, 2011

i have a datagridview with a readonly cell, i would like to show a formdialog window when the user press the space key. but is not possible since the cell is readonly=true.

i'v been using the following code with the EditingControlShowing event. and when the cell is readonly=false it works sometimes.

Private Sub sub_fecha_keydown(ByVal sender As Object, ByVal e As KeyEventArgs)
If e.KeyCode = Keys.Space Then
Dim frm As New frmFecha

[Code].....

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Datagridview And The Cell Gets Validated In The Validating Event

Aug 8, 2010

I have a datagridview and the cell gets validated in the validating event;

[Code]...

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DataGridView Cell Click Event In VS 2010?

Jul 28, 2011

I am a tad new to the DataGrid controls, but I am just curious as to why the first code block below works, but the second code block does not? (Only thing I can see is the
Handles DataGridClaims syntax

Block 1
Private Sub DataGridClaims_CellContentClick_1(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridClaims.CellContentClick

[code].....

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VS 2008 Datagridview Cell Value Changed Event?

Aug 2, 2011

vb.net
Private Sub DataGridView1_CellValueChanged _
(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) _
Handles DataGridView1.CellValueChanged

[code]....

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C# - After Which Event Should Perform An Action After Editing A Cell In A DataGridView

Mar 24, 2010

I have a WinForms DataGridView control on a form. There are two fields in this DataGridControl:

Email Address
Resolved Email Address (calculated based on the input in Email Address)

After the user inputs or changes a value in Email Address, I want the value in Resolved Email Address to update based on a separate method. What event should I tie in to so that that the Resolved Email Address cell is updated after the Email Address cell is updated?I'm not sure where to put the event because the user could do a number of things after adding/changing a value: tab to the next cell, click cancel on the form, click ok on the form, etc.

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Comboboxcolumn In DataGridView With An Event That Autosizes Cell Width

Nov 25, 2009

I have a comboboxcolumn in a DataGridView. I have loaded int with string data that appears in the dropdown box. I have added an event to it for an SelectedIndexChanged. What I am trying to do is autosize the width of the cell in the column based on the string chosen in the drop-down box within this SelectedIndexChanged event. This seems to work but it does not work off the initial selection change. When I select the desired string in the dropdown box the width of the cell does not autosize. I am not sure why.

I was trying to get around this by wrapping an IF stmt around the autosize logic by saying if cell value = "" then cell.width = Max Width of all loaded strings/ However, I can't figure out how to access the string array loaded into the dropdown list

[Code]....

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DataGridView - Trigger Event When Type Something Wrong In Cell

Jun 1, 2011

I want to have one event triggered when I type something wrong in the cell in the specific column in the datagridview. What event should be? Or cell leave?

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Change Cell Color Of A Datagridview On The Form Load Event?

Nov 10, 2010

I would like to be able to show the defaultstyle of the cell in the form load

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Raise EditingcontrolShowing Event When We Try To Change The Value Of A Combobox Cell In Datagridview

Jul 21, 2011

is it possible to raise EditingcontrolShowing event when we try to change the value of a combobox cell in datagridview

[Code]...

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VS 2010 DataGridView - Event When User Edits Checkbox Cell?

Jun 6, 2010

I'm afraid this is a very simple question, but I can't figure it out... I hardly ever use the DataGridView (usually use a third party grid) so I never needed to do this before.Anyway, I have a DataGridView that is data-bound to a List(Of SomeClass). The grid is not ReadOnly, but I made every column ReadOnly except the very first, which is a boolean column so it displays a checkbox. This way, the user cannot edit any cell value, but he can check/uncheck the checkbox in the first column.

What I need now basically is an event that is raised when the user (not programmatically) changes the value of this checkbox. I also need to be able to retrieve the bound item from that event (from the row number I think?) but that should be no problem, I hope.Anyway, there's a bunch of events that looked promising but all have something I don't want:

1. CellBeginEdit - Fires before the checkbox value has changed, so can't use this.

2. CellEndEdit - Only fires after the edited row loses focus. I want to save it back to the database as soon as the user changes the checkbox value!

3. CellValueChanged - Same problem as nr 2.

I'm sure it must be possible for me to react as soon as the user changes the value of the checkbox? How can I do this?

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