I'm trying make an option in ContextMenuStrip for my DataGridView which will allow to edit specific cell within the selected row, while the DataGridView is ReadOnly as default.
I have the following code which seems to work for other people, but not for me:
Private Sub Edit_ToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles Edit_ToolStripMenuItem.Click
If DGV_1.SelectedRows.Count > 1 Then
MsgBox("Please select only one item.")
Else
DGV_2.CurrentRow.Cells(2).ReadOnly = False
DGV_2.CurrentCell = DGV_2.Item("Qty", DGV_2.CurrentRow.Index)
DGV_2.BeginEdit(True)
End If
End Sub
Bit more context - DGV_2 values are based on selection within DGV_1, hence the If statement to only allow edit row cell Qty in DGV_2 when its values are coming from only 1 selected row in DGV_1.
When this option is clicked, I want the user to be focused/entered into edit mode of the Qty cell within the selected row in DGV_2.
Again, as per #jmcilhinney comments under the initial question, I was able to solve my issue by making DGV_2.ReadOnly = False and then configuring the below event:
Private Sub DGV_2_RowsAdded(sender As Object, e As DataGridViewRowsAddedEventArgs) Handles DGV_2.RowsAdded
If DGV_2.Rows.Count > 0 Then
DGV_2.Rows(e.RowIndex).Cells(0).ReadOnly = True
DGV_2.Rows(e.RowIndex).Cells(1).ReadOnly = True
DGV_2.Rows(e.RowIndex).Cells(2).ReadOnly = True
DGV_2.Rows(e.RowIndex).Cells(3).ReadOnly = True
End If
End Sub
Now the code I included in the initial question works.
Thanks again #jmcilhinney!
Related
I have this code to select each row of DataGridView (by button click), but the associated controls don't display any data from the grid, only changes if i click manually at rows, this code only highlight the successive row but don't select really, the selection mark remains at the first row:
https://imgur.com/gZlQBh8
Dim i as integer = 0
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
If i > DataGridView.SelectedCells.Count - 1 Then
Else
_2018DataGridView.Rows(i).Selected = True
End If
i += 1
End Sub
The DataGridView settings:
multiselect = false
Other problem with this code: The highlighting only works until the visible rows. dont highlight if its no visible row.
Yes! thats the problem, now works, solved with:
For i = 0 To _2018DataGridView.Rows.Count - 1
_2018DataGridView.CurrentCell = _2018DataGridView.Item(0, i)
I have this datagridview
I was wondering if there is a way to disable the abillity of the user to select cells of the first column (the one with an arrow), but i still need the user to be able to select all other cells,exept the ones on the first column.
If the selection is moved to the target column, using the DataGridView1.SelectionChanged event you can prevent the selection focus, setting the DataGridView1.CurrentCell to next column cell in the same row.
This works for selection events generated by both Mouse clicks and cursor movement.
Private blockedColumn As Integer = 0
Private Sub DataGridView1_SelectionChanged(sender As Object, e As EventArgs) Handles DataGridView1.SelectionChanged
If DataGridView1.CurrentCell.ColumnIndex = blockedColumn Then
DataGridView1.CurrentCell =
DataGridView1(blockedColumn + 1, DataGridView1.CurrentCell.RowIndex)
End If
End Sub
You could set dataGridView1.Columns(0).Frozen = True anyway, for other uses. But it's not necessary.
In my project, I have a few textbox inputs, and some combo boxes with maybe 2 indexed items on a form. There's a button I'm disabling on load if no input is supplied to both textbox inputs, and it works great even if I delete out any text. However, I'm having issues with forcing the combo box to behave in the same manner. This work however:
Private Sub cboPickShirts_SelectedIndexChanged(sender As Object, e As EventArgs) Handles cboPickShirts.SelectedIndexChanged
InputCheck_3 = True
If cboPickShirts.SelectedIndex < 0 Then
InputCheck_3 = False
End If
If InputCheck_3 = False Then
btnInputResult.Enabled = False
ElseIf InputCheck_3 = True Then
btnInputResult.Enabled = True
End If
End Sub
I have InputCheck_3 set up as a global variable in a Public Module. On form load, I'm disabling my button and it doesn't enable until I select one of the indexed items. My struggle to get the button disable again if any combo box text is entered and deleted out, leaving it null or empty. Any thoughts on what I'm missing or what I can add to get results? I guess I need a variable or event to notice the change (entering & deletion of text).
The problem you are having is that your SelectedIndexChanged event is not being triggered when you remove the selected item from your ComboBox. I would use the TextChanged event of your TextBox's and ComboBox and give it a common handler and check it that way. Something like this
Private Sub TextChanged(sender As Object, e As EventArgs) Handles TextBox1.TextChanged, TextBox2.TextChanged, cboPickShirts.TextChanged
EnableCheck()
End Sub
Private Sub EnableCheck()
btnInputResult.Enabled = (String.IsNullOrEmpty(TextBox1.Text) And String.IsNullOrEmpty(TextBox2.Text) And ComboBox1.SelectedIndex = -1)
End Sub
You can also check that the comboBox is NullorEmpty the same way as the textbox's. As it stands right now the combobox will be enabled when the text no longer matches a selection.
One line code
btnInputResult.Enabled = If((cboPickShirts.SelectedIndex<0),False, True)
I am a new user to vb.net and need to hide a row when a user right clicks on a contextmenu and selects hide. I have googled this but have yet to find a way to do it.
At the moment, when a user clicks on an entry in the grid, the value is entered into a text box which is fine. What I need to do is hide the entry the user right clicked on and hide the selection. As I am new I am finding it hard going to code this as I have just finished my first course which entailed the basics. Any help would be appreciated or if you need anymore code, then please ask.
Dim value As Object = UserDataGridView.Rows(e.RowIndex).Cells(0).Value
txtCustomerActive.Text = CType(value, String)
Private Sub HideToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles pnlContextMenuStrip1.ItemClicked
'Get the text of the item that was clicked on.
'Dim text As String = txtCustomerActive.Text
Try
'txtCustomerActive.Visible = False
pnlContextMenuStrip1.Visible = False
MessageBox.Show(txtCustomerActive.Text)
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
You could use Rows.Item() to hide specific DataGridViewRow, like:
If (UserDataGridView.Rows.Count > 0) Then
For Each row As DataGridViewRow In UserDataGridView.SelectedRows
UserDataGridView.Rows.Item(row.Index).Visible = False
Next
End If
I am assuming you are using FullRowSelect here.
If you are not using FullRowSelect you could have this alternative code which could catch both Cell being Selected or Row being Selected:
If (UserDataGridView.SelectedRows.Count > 0) Then
For Each row As DataGridViewRow In UserDataGridView.SelectedRows
UserDataGridView.Rows.Item(row.Index).Visible = False
Next
ElseIf (UserDataGridView.SelectedCells.Count > 0) Then
For Each cell As DataGridViewTextBoxCell In UserDataGridView.SelectedCells
UserDataGridView.Rows.Item(cell.RowIndex).Visible = False
Next
End If
To Unhide everything let's say from a Button Click you could have this:
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
For Each row As DataGridViewRow In UserDataGridView.Rows
If (row.Visible = False) Then
UserDataGridView.Rows.Item(row.Index).Visible = True
End If
Next
End Sub
As far as I know, you can not make a server-side handler for right mouse click (as you did for HideToolStripMenuItem_Click, which works as part of .NET postback mechanism).
However, I believe that such feature could be done with some client-side javascript progamming.
Hope this helps!
Good day everyone.
I need your help in this project I am into (a Visual Basic program with no database.) It just contains a Datagridview, a Textbox, and three buttons (an "Add" Button, a "Edit" and an "Update" Button).
1 . Is there any way (like using "for loop") to automatically assign DataGridView1.Item("item location") to the one edited and be updated?
2 . Or is it possible to just click an item in the Datagridview then it will be edited at that without passing it to a Textbox, and to be updated at that.
The DataGridViewCellEventArgs variable (e in the method stub the designer will generate for you) of the double click event of the cell has RowIndex and ColumnIndex properties which refer to the position of the cell you clicked.
Save those (in a class variable possibly or a local one if that's all you need) and then refer to them when you update the cell in your DataGridView, possibly like this MyDataGridView.Item(e.ColumnIndex, e.RowIndex) or MyDataGridView.Rows(e.RowIndex).Cells(e.ColumnIndex) where e is the variable from the double click event handler.
For you cell double click event you could have something like this:
Private Sub DataGridView1_CellDoubleClick(sender As Object, e As DataGridViewCellEventArgs) Handles DataGridView1.CellDoubleClick
Using myEditor As New frmCellEditor(Me.DataGridView1.Item(e.ColumnIndex, e.RowIndex).Value)
If myEditor.ShowDialog() = DialogResult.OK Then
Me.DataGridView1.Item(e.ColumnIndex, e.RowIndex).Value = myEditor.NewCellValue
End If
End Using
End Sub
This will call a new instance of your editor and get a value from you. For the purpose of this demo I have made a form like this:
Public Class frmCellEditor
Public NewCellValue As Integer
Public Sub New(ByVal CurrentCellValue As Object)
InitializeComponent()
Me.TextBox1.Text = CStr(CurrentCellValue)
End Sub
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Me.NewCellValue = CInt(Me.TextBox1.Text)
Me.DialogResult = DialogResult.OK
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
Call Me.Close()
End Sub
End Class
Which just has two buttons (Button1 = OK, Button2 = Cancel). When you click OK, it just returns the value 1 which then gets set as the value of the cell.
This is a VERY simplistic example, but it should provide you the basics of what you are trying to do.
UPDATE:
I updated the code for the editor interface so it will include handling for passing the value back and forth from the form with your datagridview.
In your project, make a new form called frmCellEditor. This forms has to have two buttons and a textbox (Make sure that the programmatic names match!). Replace the code with the code listed above. You will have to add Imports System.Windows.Forms above the class as well.
Amend the event handler for the cell double click event of your datagrid to pass the cell value when frmCellEditor is constructed (the line going ... New frmCellEditor(...).
How many columns does your DataGridView has?
Based on how you populate your DataGridView, I'll assume only 1.
Declare this on top of your form
Dim i as Integer
On your btnUpdate_Click Event (Just combine your Edit and Update button into One)
SELECT CASE btnUpdate.Text
Case "Update"
With DataGridView1
'Check if there is a selected row
If .SelectedRows.Count = 0 Then
Msgbox "No Row Selected for Update"
Exit Sub
End If
i = .CurrentRow.Index 'Remember the Row Position
Textbox1.Text = .item(0 ,i).value 'Pass the Value to the textbox
.Enabled = False 'Disable DataGridView to prevent users from clicking other row while updating.
btnUpdate.Text = "Save"
End With
Case Else 'Save
DatagridView1.Item(0,i).Value = Textbox1.Text
btnUpdate.Text = "Update"
END SELECT
Thanks for those who contributed to finding answers for this thread. I have not used your solutions for now (maybe some other time). After some research, I've found an answer for problem 2 (more user friendly at that):
2 . Or is it possible to just click an item in the Datagridview then
it will be edited at that without passing it to a Textbox, and to be
updated at that.
Here's what i did:
in Private Sub Form1_Load, just add:
yourDataGridView.EditMode = DataGridViewEditMode.EditOnEnter
in Private Sub yourDataGridView_(whatever event here: DoubleCellClick, CellContentClick, etc.) add:
DataGridView1(e.ColumnIndex, e.RowIndex).[ReadOnly] = False
DataGridView1.BeginEdit(False)