Example datagridview rowvalidating event !!!! love the

Sunday, March 18, 2018 by Teddy

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1.DataGridView - Cell Capture, Cursor Focus, Cursor Leave, and Edit - VB.NET 2005

Hi Linda and Jeffrey, Thank you very much for your posta! When I run the following modified code Linda provided, and enter "a" on the first cell of the first row the message box still appears twice with "a" in it. This happens on all the cells. I guess this is not a biggie... I have two additional questions for both of you: 1 - How can I make the cursor blink in the first cell/column of the first row once I open/load the form? ? I managed to take the focus to first cell/column of the first row once I open/load the form. But I do not know how to make the cursor blink. Can you help? 2 - Also, could you give me the code and tell me how to move the cursor to the first cell/column of the SECOND row once the 'Enter' key is pressed in the first cell/column of the first row? Please reply here or on Harry.SQLServer AT gmail DOT com Here is the complete code that I have: Public Class frmSampleReceipt Inherits System.Windows.Forms.Form Dim txtbox As System.Windows.Forms.TextBox = Nothing Public Sub New() InitializeComponent() Me.MdiParent = SPP.frmMainMenu SPP.frmMainMenu.Show() End Sub Private Sub frmSampleReceipt_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load FormPosition(Me) AddHandler dgvReceipt.EditingControlShowing, AddressOf dgvReceipt_EditingControlShowing AddHandler dgvReceipt.CellLeave, AddressOf dgvReceipt_CellLeave Me.dgvReceipt.RowCount = 20 Me.dgvReceipt.CurrentCell = Me.dgvReceipt.Item("SampleID", 0) End Sub Private Sub dgvReceipt_CellLeave(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles dgvReceipt.CellLeave If Not (txtbox Is Nothing) Then RemoveHandler txtbox.KeyPress, AddressOf txtBox_KeyPress End If End Sub Private Sub txtBox_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) MsgBox(e.KeyChar.ToString()) End Sub Private Sub dgvReceipt_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles dgvReceipt.EditingControlShowing txtbox = CType(e.Control, System.Windows.Forms.TextBox) If Not (txtbox Is Nothing) Then AddHandler txtbox.KeyPress, AddressOf txtBox_KeyPress End If End Sub End Class Thank you very much in advance! Harry

2.How to set focus back in DataGridView Cell

Hi, I am catching the CellValidating event in the DataGridView cell, if validating fails, I want put focus back to the cell, following is my code(it doens't work) private void dataGridView_CellValidating(object sender, DataGridViewCellValidatingEventArgs e) { try { // code to validate ................ } catch(Exception) { // if caught exception, will set the focus back dataGridView.SelectedCells[0].DataGridView.EditingControl.Focus(); } } I hit the tab or clicking to another cell, my debug code goes to the validating, however after calling the DatGridView.EditingControl.Focus(), it still leaves the selected cell? Please advise how can I set the focus back to the selected cell? Thanks! Hank

3.Datagridview - Move Focus to a Particular Cell

I am trying to use the bindingnavigator addnewitem button to place the focus on the first cell in the newrow row. I have disabled the default action and I am using the bindingnavigatoraddnewitem click event. Using newrowindex for the row how can I move the focus?

4.DataGrid Cell: Custom Font/Backcolor/Format cell by cell (VB.NET)

5.DataGridView RowValidating IndexOutOfRangeException

Hi all, I am having a problem with inserting rows in to my datagridview control. The datagridview is bound to a bindingsource with a filter set. If i try and add a row to the datagridview while the filter is set i get an IndexOutOfRangeException specifying that the index of the row i have just added does not exist. I have managed to narrow down the conditions that cause the error and it seems to surface if i have a filter set for a paricular column value. For example if I have a filter set to name = bob and attempt to add a row but specify name = bill i will get the IndexOutOfRangeException. The exception occurs when i try and access the datagridview.currentrow property in my rowvalidating event handler, or alternatively datagridview.rows(e.rowindex). void ValidateRow(object sender, DataGridViewCellCancelEventArgs e) { DataGridView tmpDGV = ((DataGridView)sender); try { if (tmpDGV.IsCurrentRowDirty && tmpDGV.CurrentRow != null) { if (Properties.Settings.Default.validation && RowHasValiadtionErrors(tmpDGV.CurrentRow)) { MessageBox.Show("invalid format.", "Segment Format Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning); e.Cancel = true; } else { PersistCellErrors(tmpDGV.CurrentRow); } } tmpDGV.InvalidateRow(e.RowIndex); } catch (IndexOutOfRangeException ex) { //filtered row addition will throw this tmpDGV.InvalidateRow(e.RowIndex); } If i debug this code and step through it i can see that when i have finished editing the new record and hit enter the row validating event handler fires. This works fine at first. The row validating event handler then fires a second time and this is when the exception is thrown. I can catch the exception and it would seem that the row is successfully added to the datagridview however I'd like to know what it is that is causing this behavior. Any help would be greatly appreciated as I am stumped on this one! Thanks. Imran


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