Solved

Data vailidation in True DBGrid

Posted on 1998-05-31
1
1,053 Views
Last Modified: 2012-08-14
I have added the codings as follows to check the data in Item No.'s column, if the input item no. is valid, its descripton will be displayed at column 4 and column 5.


Private Sub TDBGridLoanDetails_BeforeColUpdate(ByVal ColIndex As Integer, OldValue As Variant, Cancel As Integer)
    If ColIndex = 2 Then
        If TDBGridLoanDetails.Text = "" Then
            PostMsgId = 1 'Item no. may not be empty.
            ' Schedule the PostEvent event
            TDBGridLoanDetails.PostMsg PostMsgId
       
            ' The following is used to keep the cell blank
            ' (remove it to restore the old cell value)
            OldValue = ""
       
            ' Cancel the update and keep focus on this cell
            Cancel = True
            Exit Sub
        End If
       
        If ItemAvailable(CLng(TDBGridLoanDetails.Text)) Then
            ShowDescription
        Else
            TDBGridLoanDetails.PostMsg PostMsgId
            OldValue = ""
            Cancel = True
        End If
       
    End If
End Sub

Sub ShowDescription()
    TDBGridLoanDetails.Columns("Model Description").Value = ItemModel
    TDBGridLoanDetails.Columns("Serial No.").Value = ItemSerial
End Sub

However, it's description does not display.
What's the problem ?

I have tried another method, I check the item no. at the KeyPress method of the TDBgrid.

If KeyAscii = vbKeyReturn Or KeyAscii = vbKeyTab Or _
       KeyAscii = vbKeyLeft Or KeyAscii = vbKeyRight Or _
       KeyAscii = vbKeyUp Or KeyAscii = vbKeyDown Then
        'Check Item No.
        If TDBGridLoanDetails.Col = 2 Then
            If TDBGridLoanDetails.Text = "" Then
                PostMsgId = 1 'Item no. may not be empty.
                ' Schedule the PostEvent event
                TDBGridLoanDetails.PostMsg PostMsgId
                Exit Sub
            End If
       
            If ItemAvailable(CLng(TDBGridLoanDetails.Text)) Then
                ShowDescription
            Else
                TDBGridLoanDetails.PostMsg PostMsgId
            End If
        End If
    End If
End Sub


At this case, the item's description can be displayed at column 4 and column 5 when user press [Enter] key but not the arrow keys or the tab key.
0
Comment
Question by:yyjulie
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 1

Accepted Solution

by:
terencebeh earned 20 total points
ID: 1462163
Try put the similar code in the KeyDown event. Use KeyCode instead of KeyAscii in the KeyDown event.

0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When trying to find the cause of a problem in VBA or VB6 it's often valuable to know what procedures were executed prior to the error. You can use the Call Stack for that but it is often inadequate because it may show procedures you aren't intereste…
Background What I'm presenting in this article is the result of 2 conditions in my work area: We have a SQL Server production environment but no development or test environment; andWe have an MS Access front end using tables in SQL Server but we a…
As developers, we are not limited to the functions provided by the VBA language. In addition, we can call the functions that are part of the Windows operating system. These functions are part of the Windows API (Application Programming Interface). U…
Show developers how to use a criteria form to limit the data that appears on an Access report. It is a common requirement that users can specify the criteria for a report at runtime. The easiest way to accomplish this is using a criteria form that a…
Suggested Courses
Course of the Month9 days, 9 hours left to enroll

624 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question