• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 1098
  • Last Modified:

validating Date Textbox in datagridview

I am working on a windows application using VB.Net. I have a datagrid view, in which the fourth column is a textbox, in whioch the date is to be entered.I wanted to validate it to make sure that the date entered is in DD/MM/YYYY. How can i do this....

If the entered value is wrong..i wanted to inform the user that the date is not in the correct format and edit it..and the user should not be able to submit the form until he enters the correct date.....
0
yuvaratna
Asked:
yuvaratna
  • 3
  • 3
  • 2
  • +2
1 Solution
 
QPRCommented:
You could offer them a date picker control which means they couldn't select an invalid date even if they wanted to
0
 
QPRCommented:
0
 
JackOfPHCommented:
I suggest you to use datepicker instead

Here is how:
http://msdn.microsoft.com/en-us/library/7tas5c80.aspx
0
Cloud Class® Course: SQL Server Core 2016

This course will introduce you to SQL Server Core 2016, as well as teach you about SSMS, data tools, installation, server configuration, using Management Studio, and writing and executing queries.

 
Jorge PaulinoIT Pro/DeveloperCommented:
You can also use CellValueChanged event to validate the date
Example:

    Private Sub DataGridView1_CellValueChanged(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellValueChanged
 
        If e.ColumnIndex <> -1 AndAlso e.RowIndex <> -1 Then
 
            ' Column nº4
            If e.ColumnIndex = 3 Then
 
                Dim dt As DateTime
                Dim value As String = Me.DataGridView1(e.ColumnIndex, e.RowIndex).Value.ToString
 
                If value <> String.Empty AndAlso Not DateTime.TryParse(value, dt) Then
                    MessageBox.Show("You must enter a valid date!")
                    Me.DataGridView1(e.ColumnIndex, e.RowIndex).Value = String.Empty
                End If
            End If
        End If
 
    End Sub

Open in new window

0
 
Jorge PaulinoIT Pro/DeveloperCommented:
Or you can use CellValidating and force a valid date to leave the cell
    Private Sub DataGridView1_CellValidating(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellValidatingEventArgs) Handles DataGridView1.CellValidating
 
        ' Column nº4
        If e.ColumnIndex = 3 Then
 
            Dim dt As DateTime
            If e.FormattedValue.ToString <> String.Empty AndAlso Not DateTime.TryParse(e.FormattedValue.ToString, dt) Then
                MessageBox.Show("You must enter a valid date!")
                e.Cancel = True
            End If
 
        End If
 
    End Sub

Open in new window

0
 
yuvaratnaAuthor Commented:
Perfect! thanks a lot
0
 
yuvaratnaAuthor Commented:
Hi jpaulino can you tell me how can i make sure that the iuser entered something in the textbox ..I mean i wanted to make it required field....the user should not be able to submit the form until he enters some thing in the textbox...
0
 
Jorge PaulinoIT Pro/DeveloperCommented:
The CellValidating event with the e.Cancel = True forces the user to enter something ... is that it ?
0
 
yuvaratnaAuthor Commented:
but that is allowing the user to submit the form and as it is null, it is throwing a null reference exception...
0
 
McGurk1Commented:
Be careful using the above code.  It allowed me to enter the following:  12/12/152 as a date.  I don't have the answer yet to how to fully check for the date but wanted to caution anyone trying to use the code as it is above.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Get expert help—faster!

Need expert help—fast? Use the Help Bell for personalized assistance getting answers to your important questions.

  • 3
  • 3
  • 2
  • +2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now