I have a winforms application that uses a datagridview. When I access the EditedFormattedValue of a cell while it is in edit mode, sometimes, but not always, the whole cell turns black. Is this a feature of the datagridview, perhaps some sort of validation feature I need to turn off? Also, changing the background color doesn't remove the black background for me.
View 1 Replieswhen i click on a comboboxcell in a datagridview, the background turns black . . .
View 4 RepliesHow do I access the new value that a user has entered into a DataGridView cell? I've tried using the "e" parameter in several event types including CellLeave and each time I can only reference the old value.
View 4 RepliesI would like some help for getting a value out of a selected row of a datagrid. I am beginning ti find out that it is not very intuitive in VB2003 which is what I have to program in.
View 2 RepliesHave this code so that when a checkbox in a column of my datagridview is checked, then the corresponding cell in column 2 (of the same row the check box is in) will turn blue with font color white.
[code]...
I'd also like to add a line so that as well as the cell going blue, the bottom border of the cell disappears, so cellborderstyle = none.
I have a DataGridView with several columns. One column is a TextBox column named "Status". This column can only show one of three values: 'Final', 'Ready', or 'No Reportable'. I want to have some code that would turn the TextBox cell into a ComboBox cell when the user left-clicks on the cell to allow the user to choose one of these three options. When the user clicks elsewhere or the cell loses focus I want the cell to change back to a TextBox cell.
Here is what I have so far, but the code throws an exception indicated below Plus, I don't think the code would remove the combobox when the cell loses focus.
Exception: "Provided cell does not belong to this DataGridView control."
Private Sub dgvCalculatedResults_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles dgvCalculatedResults.MouseDown
Dim ht As DataGridView.HitTestInfo = Me.dgvCalculatedResults.HitTest(e.X, e.Y)
[Code].....
Is it possible to disable cursor moving from cell to cell in datagridview?
View 5 RepliesI have a Datagridview called DgvReturns. which contains two fields,
1) Yes - checkbox (boolean)and
2) Received Date - textbox (DateTime)..
What I want to do at run time is that when a user Checks the Yes checkbox Received Date is populated with the current Datetime.
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
View 1 RepliesI have a datagridview and it has 8 columns as textboxcolumns. I am handling their cell validation with cellValidating event.
My question is that if cell validation fails for 3rd column of the datagridview then the focus should move from 3rd column to 1st column of the datagridview. How can i do this?
I have tried datagridview.column(0).selected = true, when validation for 3rd column fails, but this is not working. Focus still moves to the next cell. I can stop the focus to the current cell with e.cancel=true but i want it to move to the very first cell of the datagridview.
I have a datagridview and it has 8 columns as textboxcolumns. I am handling their cell validation with cellValidating event. My question is that if cell validation fails for 3rd column of the datagridview then the focus should move from 3rd column to 1st column of the datagridview. How can i do this?I have tried datagridview.column(0).selected = true, when validation for 3rd column fails, but this is not working. Focus still moves to the next cell. I can stop the focus to the current cell with e.cancel=true but i want it to move to the very first cell of the datagridview.
View 13 RepliesI have a DataGridView where Cell_Validating is being done. I have a Cancel button on my form that allows the user to exit out of the DataGridView changes. The problem is that if a cell was currently flagged as in error, I cannot exit and remove columns from the DataGridView. I get the following error: Operation did not succeed because the program cannot commit or quit a cell value change. Is there a way to cancel the validation once the focus has been removed from the DataGridView? Here is my Cell_Validating
[Code]...
I'm populating a DataGridView from a file with the following
Dim fnum As Short = FreeFile()
Dim inputLine As String
Dim i As Short = 0
Dim strAuditDate As String
Dim strAuditTime As String
Dim msg As String
[Code]...
When I do this, the MessageBox.Show shows the contents of a row, which is tab delimited. How do I get the data that I read to display in columns of the Gridview?
Another newbie question i am afraid, I have created a game of pontoon it generates the numbers into an array and the assigns the values to the labels. this all works great.however the bit that i am stuck on is creating a player turn as each label has a name lnlP1Card1 to lblP1Card5 for player 1 and lblP2Card1 -5 for player 2 etc. I tried to create a set of if statements that checked a counter and then if the counters value matched the if statement the players turn moved to the next player. sample
If pcount < 5 Then
Do
If pcount = 1 Then
[code]....
In my program (PassGen) i have a DataGridView control that stores passwords.But when i add more about 20,000 or more entries at the same time (using "Generate List", UI freezes up for a few minutes.I tried to add new entries from a background thread (so main thread will redraw the form), but run into exceptions How to do that?
View 1 RepliesI was under the impression that any time I set a Nullable(Of Something) to Nothing, it will take the value of Nothing.In a class, I have;
Private _something As Nullable(Of Double)
Public Property Something() As Nullable(Of Double)
Get
Return _something
End Get
[Code]...
In my page, using this class I set Something = Nothing, but as I step into the Set method, value = 0.0.Am I doing something wrong here? Or do I just not understand Nullable types yet?
Every once in a while, my GUI form will turn into a code. So in the right panel (Solution Explorer), I click on Form2 to edit my gui, but instead a blank editor appears.Yet when I am debugging the application, everything is normal and I can see the GUI fine.
View 2 RepliesI have just found that if a DataGridView image column's size (height & width - in pixels) is smaller than the image's original size (in my case all images are exactly 180 x 180 pixels) at the time the cell is populated then the image is automatically being converted to a lower resolution I assume to fit the image completely within the size of the cell). How can I stop the automatic scaling of the image?
The image below show the same file displayed twice, both at 60x60 pixels ('Thumbnail' column) and a blowup of the image (PictureBox populated via the CellMouseEnter event) to it's right. You'll notice the resolution of the first blowup is far less the the second. so, what made the difference in the resolution of the blowups is? In the second blowup's case I'd first stretched the image column's width to ~180 pixels and set the row height to match (via the ColumnWidthChanged event) then populated the DataGridView then stretched the image column to 60 pixels (its minimum).
i have a program were you import a image with a red back and the red disapeers and turns transparent using this code. But it uses a bitmap as a image holder and bitmap does not support transparacy. So i need a image bitmap so i dont know what else to do
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How to make a programe that turns off the computer after a set amount of time.
View 13 RepliesI'm trying to add a string to a listbox if there is none exact string existed inside, but it turns out a very weird error. Look at this.
On form_load, I have this:
AddHandler Server1.OnUserLoggedIn, AddressOf HandleUser
And then,
Public Sub HandleUser(ByVal username As String)
'Here, you handle adding the text to a text box.
Me.Invoke(New PrintMessageDelegate(AddressOf AddUser), username)
End Sub
[Code] .....
The output is when I connect the first client, it works fine. But, when I try to connect the second client, it prints out three times both the listbox1 item and the txtDisplay. It's like get caught in loop, but I have tried other kind of loops like for each and other string comparison too, still work that way.
I wish to have a list selection inside a cell of it. like when the cursor is placed in a particular cell and the user hits 'Tab' button in keyboard a list of names & no should be listed and they have to select a particular name, click a particular row in the list form, which in turn needs to fill the cell with the name value.m
View 5 RepliesThere are 3 columns(Count,Item,Price) in datagridview which is bound to a datasource. The count is 1 by default and it should increment by 1 when i click on a button,so the count would be 2 if i click button again
View 3 RepliesHow can I get the value of the first cell of the row of the selected cell or selected row in a datagridview?
View 5 Repliesi have a datagridview which i populate of a dB. i have 3 columns on the dgv Account ID, Account Type and Notes. i created an add record button, that enables the user to add records. Account ID is a numerator in the dB, and i would like to automatically add 1 to the numerator. however i can't get the value of the last cell in the last row. for now i am using
Dim RowCount As Integer = Me.grdAccountTypes.RowCount - 1
Dim AccountID As Integer = grdAccountTypes.Item(0, RowCount).Value
MessageBox.Show(AccountID)
How to do that no one cell is selected in DataGridView at first moment? (There are some controls in my form before the DataGridView and I don't want that any element of DataGridView is selected when the form is loaded).
View 2 RepliesI have a datagridview which have a ComboBoxCell, ComboBox is bound to data,, I want to use it as Traditional ComboBox,, I mean I want to display its Item (from display members) on the base of its value.
For example:
When I do this
Datagridview1.CurrentRow.Cells(4).value = 4 'Cell 4 is the DatagridviewComboBoxCell
It gives me the error that
"DatagridviewComboBoxCell.value is not valid",
But I want that this combobox should Select And Display the item which value is 4.
I'm using VB.Net.'m using DataGridView with ColumnType = DataGridViewTextBoxColumn.
I have 3 columns. Column1, Column2, Column3. for example:
Column1 Column2 Column3
1 AA AAA
2 BB EDIT
3 CC CCC
If column3's value = "EDIT", then I need to edit only that cell. Here for example: i need to make the Column3's second cell to be readonly=false.So i cannot make any changes to (1, AA, AAA), (3, CC, CCC) and (2, BB). Need to make changes only EDIT cell.I tried this code. CountR is the row in which EDIT values is there.
[Code]...
After trying to search this forum and looking in 2 different VB 2010 books
I still don't know how to read a DataGridView cell into a variable.
I think the code should look something like this[code]...
how to change the Cell Alignment depend on the conditions. If cell value is text then cell alignment should be Left and If cell value is Integer then cell alignment should be Right.
I am going to change the Default Cell Style property then all cell alignments are changing.. But i want to see if cell value is Integer then the value starts from Right Side...