I am writing an program with multiple tabs. I have a class that reads a database and offers that data and other calculated data as a collection (the class is cEngines containing engine rows). I have another class which is a row (item from the list) of the collection (the class is RowData which is an engine). One of the tabs in the program contains a datagridview which is bound to the cEngines class and another tab contains controls bound to the RowData class. Both tabs have a mechanism for selecting/changing the RowData so that both tabs are syncronised. All of this works.
The RowData class has validation - both simple value checking, or more complicated checking based on other items in the class. A validation failure raises an event.
i have a datagridview (Dg) with 7 columns.i have a RowValidated event which tests if the validated cell is the first (index = 0) then sets the focus on the third cell with columnIndex = 2 BUT the cell that's getting focus after the row is validated is on the next row not the row that's has been validated !!
Private Sub Dg_RowValidated(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles Dg.RowValidated Dim colIndex = e.ColumnIndex Dim RowIndex = e.RowIndex
Is there a way to select the CurrentCell programmatically? I want to cycle through the list of SelectedCells and if they don't have a specific ColumnIndex then deselect the column. An error though is thrown when it reaches the CurrentCell though.
For i As Integer = 0 To (dgvStaffHoursNotes.SelectedCells.Count - 1) If dgvStaffHoursNotes.SelectedCells(i).ColumnIndex = _ dgvStaffHoursNotes.CurrentCell.ColumnIndex Then
I have a datagridview for user's input. For example, the columns are "Name", "Date of Birth"... For the "Date of Birth" part, i have implemented validaion... i want to make it that user have to enter a valid "Date of birth" before they are allowed to leave the Cell. Meaning once them entered the Cell, they have to provide a valid "Date of birth" then they can move on.
I have a DGV which shows data of my transaction_table. There r 4 columns ID, NAME, DUE_DATE and STATUS. Let ID is 1, NAME is alizee, DUE_DATE is 25.02.2009 and status is notpaid(by deafault). Now , I want to set row color according to following condition...if
DUE_DATE >= current date(today's) and status="notpaid"then set row color= greenif elseDUE_DATE < current date(today's) and status="paid"then set row color= greenelseset row color = redBcoz
I can set the value of a combobox on a form by using ComboBoxName.Text = "SomeText" but how can I do this if the combo box is within a datagridview? When I type DataGridViewComboBox the .text property is not listed. If I try to force it, I get an error.
I am trying to set the focus in a datagridview's cell after the user enters some data and tries to tab out of the cell. I can't seem to get the focus in the cell they just edited. I can change the background color, but the focus goes to the next field in the grid. I am trying to do this in the _CellValidating event. Here is my code :
Private Sub dgvFish_CellValidating(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellValidatingEventArgs) Handles dgvFish.CellValidating
[Code]....
The function CheckSampleNumber() takes the value of the cell just entered, and checks to see if it has been entered either in the current grid, OR in the database.
My current problem is this:I have a form and I have in it three textboxes, 1 button and 1 datagridview; I also have an acceI'm learnig now on how to create a report without a database. But In how to set the datagriview as the datasource for my report
I am having trouble setting the focus to a particular cell in datagridview.
I have a timetable and on initialisation of the program, it compares the time in the datagridview with the current time. If the time has passed, the row is displayed in grey, if not then it is shown in black. I then want to scroll through the datagridview to focus on the first black line.
Here is the
----------------------------------------------------------- Private Sub DataGridView1_CellFormatting(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellFormattingEventArgs) Handles DataGridView1.CellFormatting
[Code]....
"An unhandled exception of type 'System.StackOverflowException' occurred in mscorlib.dll" with the note about infinite recursion.
What have I done wrong and how do I scroll through to automatically set the focus?
I have a dialog that containers a DataGridView, this dialog is opened from a parent Form. I would like the DataGridView to have focus as soon as the form is opened, so on pressing the down key would enable you to scroll down through the rows straight away. I have tried setting the tab index so that the DataGridView is the first selected item in the form. I have also tried calling the DataGridView.Focus() method in both the dialog constructor and the Form_Load event. I have also tried setting the
I am trying to set the "ColumnHeadersDefaultCellStyle" property to the "GoudyHvyface BT" font and it will not change from the default. I am using Visual Basic 2008.
I have set the property properly with no success.
I have tried to set the property in code, using the suggestions in the MSDN and it kept throwing errors.
I am working on my media program which utilizes the amazon ecs web service. So far it does a search and pulls a list of image url's for the dvd covers.
Is what I want to do is take those image urls and somehow feed them into a datagridview, so that the user can scroll through the images and choose the right one.
Here's what I have so far
Code: If item.IsSetLargeImage() Then Dim largeImage As Image = item.LargeImage If largeImage.IsSetURL() Then
I want to set Color to specific cell in DataGridView as in this code , but didn't accept BackColor property. Form1.DataGridView1.CurrentRow.Cells(3)......BackColor
I have a datagridview which has mixed values in one column. Is there a way to add a control into the Value cell depending on the row? For example, for Name and Age row, it will be a regulator textbox but for the Products row, I want to be able to add a combobox.
I can't seem to set the selected index or selected value of a DataGridView combobox when loading data from a database. My DGV has two combobox columns which are bound to datatables. The DGV itself is not bound initially. After adding a row, I select a value from each combobox which then populates the rest of the cells in the row. I'm using the EditingControlShowing event to add an eventhandler to catch the SelectedIndexChange of the combo boxes. This all works as needed. My issue comes when populating the DGV with saved data, I need to add the rows and set the selected index and/or selected value of each combo box. I've searched through various forums and articles for the last week with no luck.
I'm using VS2008 sp1, .NET 3.5 sp1 and SQL 2005 sp2 Express.
I'm have an app that currently allows a user to select a color (from a Color Dialog) which updates an unbound Datagridview with the name of the selected color & also changes the background of the selected row to that color.
I need to do one of 2 things: Either change the Color Dialog so that I can set the colors available Or Allow the user to select colors from a context menu and have that update the Datagridview.
I'm having trouble with setting a datagridview's cell in edit mode, or rather, to let the user type some input on load of a form (as in Excel or the like).
This is my code (after the dgv has been filled): dgvTentander.EditMode = DataGridViewEditMode.EditProgrammatically '(or dgvTentander.EditMode = DataGridViewEditMode.EditOnEnter) dgvMyDGV.CurrentCell = dgvMYDGV.Rows(lastrow).Cells(TeCOL_Quant) dgvMYDGV.BeginEdit(True)
The code correctly indicates that the cell is selected, and when the page is loaded I can still se the cell selected, but the cursor doesn't appear and nothing happens when I type.
I have a datagridview with 3 columns. The second column is a combobox which I want to bind with a dataset. How do I go about setting the column index for it as I am doing something like this.
I need a help with showing/hiding rows in datagridview by setting the trackbar value. The below example works if there are not too much rows. If there are greater number of rows then after you change a value of trackbar you must wait for a few seconds for the datagridview to redraw and only then you can use trackbar again.Apparently I must use multithreading to achieve what I want: when I use trackbar, datagridview starts to redraw, but if I use trackbar again before datagridview finishes redrawing, it immediately stops redrawing according to previous trackbar value and starts to redraw from the beginning according to current trackbar value. That way trackbar will never be frozzen (stuck, unusable...).I tried with backgroundworker but got error "Cross-thread operation not valid: Control '' accessed from a thread other than the thread it was created on." I have old and slow computer. If you have new and fast computer maybe you wont experience what I'm describing here so try to increase number of added rows in line 'For i As Integer = 1 To 5000' (I added 5000 rows here) - and if you have even older and slower computer than you will have to decrease this value or you will have to wait to long after you drag the thumb in trackbar.
I have several forms that have a DataGridView object in them. I recently discovered the AllowUserToOrderColumns attribute. I set it to true and I can reorder the columns at will. The problem is that the order for these columns is lost once the form is closed. Ok, how do you save the order for these columns and then restore them to the form once it has been reopened?
I want to programmatically set the focus to the last row (bottommost, its only one column wide) in the DataGridView control for Visual Basic. How can I do so?
So far, I have tried DGV.Rows.GetLastRow(DataGridViewElementStates.Selected)
without success, though I did not expect that to work. It absolutely must select that last cell. Otherwise, the application is nearly impossible to use!
Here is a screenshot of what I am making with this: [URL]..The "Paste Clipboard Contents" button only pastes into the selected cell, though I guess I could find a workaround.
I have a databound DataGridView, and I'd like to keep one column in front, with a slightly smaller width than the default. The grid's AutoSizeColumnsMode property is set to Fill so that the columns fill out the entire grid. This makes the first column equally large as all others, which is why I need to set its width manually. The smaller column is the first one with the checkboxes. I have two grids that I need to do this with, and for some reason it works just fine with the first grid, but gives a null reference error on the second grid...
Here's the code for the first grid (working fine): vb.net Public Sub UpdateTodoGrid() ' Load todo items todoGrid.DataSource = _TodoManager.LoadAll() ' Set backcolor For Each row As DataGridViewRow In todoGrid.Rows [Code] .....
As you can see, the code is exactly the same (except for not setting the BackColor of each row and not using the ReadOnly property*). When I run this code, it gives me a null reference error ("Object reference not set to an instance of an object.") on the line where I set the column's Width. Obviously 'col' is not Nothing (otherwise it would have errored before that line), and there's nothing else there that could be Nothing... I assume that something happens internally in the grid when you set the width of a column, and that there is a null reference there, but obviously I have no control over that.
The grid's are absolutely the same, as the second grid is just a 'copy' (meaning I copy/pasted it in the designer) of the first. So all their properties are equal. I thought maybe the ReadOnly properties were the problem, but I tried putting them in in the same way and the issue did not go away... The first grid is not ReadOnly (because the checkboxes need to be editable), but all rows except the first are, while the second grid is completely ReadOnly.
