I need to set a minimum length for a password that can be used in a textbox and then set a label which will say if it meets the minimum number of characters required. I know how to set the limit of characters, what I can't do is the part where it will show in a label as soon as I leave the textbox. I was thinking I need to use an event, like maybe Leave or LostFocus, but it's not working. Please help :(
Ok, There are plenty of ways to do what you want to achieve. I personally like to a separate subroutine; if you need to change one thing, you wont have to edit every single event that has the same codeFrom what I can understand, something like this should help get you on your way. Basically, we just setup a subroutine that will check to see if textbox1.text's length is more than five and we trigger the subroutine by using events such as a button click of if the textbox is clicked off.
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click ''save button
checkPassword(TextBox1.Text)
End Sub
Private Sub TextBox1_Leave(sender As Object, e As EventArgs) Handles TextBox1.Leave
checkPassword(TextBox1.Text)
End Sub
Private Sub checkPassword(password As String)
If Not password.Length > 5 Then
Label1.Text = "The password must be more than 5 charcharacters"
TextBox1.Clear()
Else
Label1.Text = "Password accepted"
End If
End Sub
Related
please am working on an Annual Crop Cashflow Calculator like an Excel
i have 3 text boxes.
textbox22 textbox31 and textbox71
if i multiply textbox22 by textbox31 it shows in textbox71
but the problem is i need an event jus like excel after calculating and user goes back to empty either textbox31 or textbox22 the answer in texbox71 should be empty...
but with what i have here d previous answer will still be there until user inputs another entry
solution please
below is my code
Private Sub TextBox71_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox22.TextChanged, TextBox31.TextChanged
If String.IsNullOrEmpty(TextBox22.Text) OrElse String.IsNullOrEmpty(TextBox31.Text) Then Exit Sub
If Not IsNumeric(TextBox22.Text) OrElse Not IsNumeric(TextBox31.Text) Then Exit Sub
TextBox71.Text = CDbl(TextBox22.Text) * CDbl(TextBox31.Text)
End Sub
You can add code to the Enter event that runs whenever the user enters a TextBox.
Private Sub MyTextBox_Enter(sender as object, e as EventArgs)
MyTextBox.Clear
SomeOtherTextBox.Clear
End Sub
Good Morning.
I have a Datagridview in a Form and it is connected in Database and it looks like this.
I have no problem with this part.
My question here is like this. How can I make the Fourth Column Editable? I mean I can edit it by clicking this property
and now the output will be like this.
Now here is the real question, I will ask a question based on the flow that my system will do.
1.The 4th Column are the column that will become editable and the rest will be locked or uneditable
2.Lets say I will put 48 how can I make it 48.00 when i leave the cell? That kind of format with .00 at the end.
3.Unable to input Letters on the 4th column.
TYSM for future help
Set the ReadOnly property to True for any column that you don't
want the user to be able to edit.
Set the DefaultCellStyle.Format property of the column to "n2" or "f2".
I'd probably advise against that because the fact that you want to include a decimal point makes it more complex. If you're determined to go ahead then you should research how to allow only numeric input in a regular TextBox, because this will work exactly the same way. You simply need to access the TextBox control used for editing via the appropriate event handlers of the grid.
In the example below, because the editingTextBox field is declared WithEvents, the last method will handle the TextChanged event for the editing control while it's assigned to that field for the duration of the editing session.
Private WithEvents editingTextBox As TextBox
Private Sub DataGridView1_EditingControlShowing(sender As Object, e As DataGridViewEditingControlShowingEventArgs) Handles DataGridView1.EditingControlShowing
Me.editingTextBox = DirectCast(e.Control, TextBox)
End Sub
Private Sub DataGridView1_CellEndEdit(sender As Object, e As DataGridViewCellEventArgs) Handles DataGridView1.CellEndEdit
Me.editingTextBox = Nothing
End Sub
Private Sub editingTextBox_TextChanged(sender As Object, e As EventArgs) Handles editingTextBox.TextChanged
'...
End Sub
Set the other columns to readonly = true and your numeric column = false and set the defaultcellstyle.format of your numeric column to "###,##0.00" and in your datagridview's cellvalidating event, do the ff:
Private Sub DatagridView1_CellValidating(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellValidatingEventArgs) Handles DatagridView1.CellValidating
Try
If DatagridView1.IsCurrentCellDirty Then
Select Case DatagridView1.Columns(e.ColumnIndex).Name.ToUpper
Case "<NAME OF YOUR NUMERIC COLUMN>"
If Not IsNumeric(e.FormattedValue) Then
MsgBox("Invalid value.")
e.Cancel = True
Exit Sub
End If
If CType(e.FormattedValue, Integer) < 0 Then
MsgBox("Invalid value.")
e.Cancel = True
Exit Sub
End If
End Select
End If
Catch ex As Exception
ErrMsg(ex)
End Try
End Sub
Private Sub dgvwithdraw_CellClick(sender As Object, e As DataGridViewCellEventArgs) Handles dgvwithdraw.CellClick
Select Case dgvwithdraw.Columns(e.ColumnIndex).Name
Case "Select", "Alloted"
dgvwithdraw.ReadOnly = False
Case Else
dgvwithdraw.ReadOnly = True
End Select
End Sub
i have a textbox called txtChat and i want that for every new line the textbox2 and textbox3 gets refreshed.. i dont know how to make thits "new line thing" or which commmand is the right one. Im looking for something like
For Each NewLine refresh textbox2&3
If you wish to monitor the input into a textbox as the user types you could use the keypress event. The parameter e.KeyChar then corresponds to the keyboard key pressed by the user. If it is equal to vbCr you can conclude the user pressed enter. Your code should probably look something like this:
Private Sub TextBox1_KeyPress(sender As Object, e As KeyPressEventArgs) Handles TextBox1.KeyPress
If e.KeyChar = vbCr Then
'Refresh textboxes 2 and 3
End If
End Sub
You would get into trouble though if, for example, the user copy-pasted something in, as the user will then not have entered a newline character.
As Dries says, you could use the textchange event, in which case you would have to check what the last character entered into the textbox is. Slightly confusingly, in this case, you would have to check if the text ends with a vbCrLf.
Private Sub TextBox1_TextChanged(sender As Object, e As EventArgs) Handles TextBox1.TextChanged
If TextBox1.Text.EndsWith(vbCrLf) Then
'Refresh textboxes 2 and 3
End If
End Sub
Take a look at the TextChange Event.
(https://msdn.microsoft.com/en-us/library/system.windows.forms.control.textchanged(v=vs.110).aspx)
It should point out what you're looking for (as far as I understand).
I am stating VB and since it is so close to VBScript I have been having fun with it. But now I have come across the "Checkboxlist".
My boss saw me making a Windows Forms Application and asked me to make him a interface (GUI) for one of his batch files. In the batch you start by choosing between lines 1 through 10 and it does the rest. So I made a Checkboxlist and made check-boxes going from 1 to 10. Now I am not sure how to tell it that when I click a button a if statement looks at what has been checked and take to appropriate action.
I think i am suppose to start with something like
If CheckedListBox1.Items() = True then
But i know this does not work.
Anything thing will help.
Thank you.
It sounds like you're looking for the ItemCheck event. This event is fired when the checked state of an item changes.
Private Sub HandleCheckedListBox1ItemCheck(sender As Object, e As ItemCheckEventArgs) Handles CheckedListBox1.ItemCheck
Dim item As Object = Me.CheckedListBox1.Items.Item(e.Index)
Dim text As String = Me.CheckedListBox1.GetItemText(item)
Select Case e.CurrentValue
Case CheckState.Unchecked
'...
Case CheckState.Checked
'...
Case CheckState.Indeterminate
'...
End Select
End Sub
Or iterate all checked items:
Private Sub HandleButton1Click(sender As Object, e As EventArgs) Handles Button1.Click
For Each item As Object In Me.CheckedListBox1.CheckedItems
Dim text As String = Me.CheckedListBox1.GetItemText(item)
'...
Next
End Sub
Currently I have the start-key for my vb.net application hardcoded like this:
GetAsyncKeyState(Keys.F2)
Where vb.net sais "F2 As System.Windows.Forms.Keys = 113" on mouse-over
But I want my users to be able to pick their own Key. If I make a drop-down box (combobox) and pre-define some choices in there (Like ESC or F3), all those choices are strings. How can I convert those strings to a System.Windows.Forms.Keys integer?
Also, I'd like it to also be possible to "capture" a single keypress. So they'd click the "capture" button, and the next key they hit will be saved as the start/stop button. But I wouldn't even know where to begin looking for that one.
If txtKeys.Text=="F3" Then
GetAsyncKeyState(Keys.F3)
End If
Try something like this:
Public Class Form1
Dim captureKey As Boolean
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
captureKey = True
End Sub
Private Sub Button1_PreviewKeyDown(sender As Object, e As System.Windows.Forms.PreviewKeyDownEventArgs) Handles Button1.PreviewKeyDown
If captureKey Then
Label1.Text = e.KeyValue.ToString
captureKey = False
End If
End Sub
End Class
I created a form with a label and a button for an example. e.KeyValue is an integer that I am converting to a string for display purposes. You also have the ability to capture other keydata. See this info on PreviewKeyDownEventArg
As for the first part of your question use a Select Case Statement to convert between your ComboBox Values and KeyData Values.