Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

vb.net get datagridview column into an array

Posted on 2013-05-26
7
Medium Priority
?
3,488 Views
Last Modified: 2013-05-26
Hi Experts.  I have a datagridview where the first column is a list of numbers and need to get the column into an array (not an array list).

I'm trying

         Dim list() As Integer
         For RowIndex As Integer = 0 To DataGridView1.Rows.Count - 1 Step 1
            list(RowIndex) = DataGridView1(0, RowIndex).Value
        Next RowIndex

Open in new window



But keep getting the error   Object reference not set to an instance of an object.

I've tried many different methods but keep getting the same error

Any help would be appreciated
0
Comment
Question by:PNRT
  • 4
  • 3
7 Comments
 
LVL 42

Expert Comment

by:Meir Rivkin
ID: 39197599
add Imports System.Linq
and use this code:

Dim arr As Integer() = DataGridView1.Rows.Cast(Of DataGridRow)().Select(Function(n) Int.Parse(n(0).Value)).ToArray()

Open in new window

0
 
LVL 2

Author Comment

by:PNRT
ID: 39197673
Thanks But got errors
First was
Type 'DataGridRow' is not defined
Changed to DataGridViewRow
Then got
Overload resolution failed because no accessible 'Select' can be called with these arguments:      

Is it not possible without Linq?
0
 
LVL 42

Expert Comment

by:Meir Rivkin
ID: 39197697
try replace line 3 with:
list(RowIndex) = DataGridView1.Rows(RowIndex)(0).Value

Open in new window

0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 2

Author Comment

by:PNRT
ID: 39197735
Thanks
But With
list(RowIndex) = DataGridView1.Rows(RowIndex)(0).Value
I get the error
Class 'System.Windows.Forms.DataGridViewRow' cannot be indexed because it has no default property

Sorry, no idea what its referring to
0
 
LVL 42

Expert Comment

by:Meir Rivkin
ID: 39197809
  Dim list As List(Of Integer) = New List(Of Integer)

        For Each d In DataGridView1.Rows.Cast(Of DataGridViewRow)()
            Dim num As Integer
            If Int32.TryParse(d.Cells(0).Value, num) Then
                list.Add(num)
            End If
        Next

Open in new window

0
 
LVL 2

Author Comment

by:PNRT
ID: 39197823
Sorry, I mentioned in the first question above it had to be a simple array not a list as I need to send the array to a function that requires an array.

I didn't realize it would be so difficult just to get a column of numbers into an array.
0
 
LVL 42

Accepted Solution

by:
Meir Rivkin earned 2000 total points
ID: 39197832
Its not at all, add this after u populate the list:
  Dim arr As Integer() = list.ToArray()
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Introduction As chip makers focus on adding processor cores over increasing clock speed, developers need to utilize the features of modern CPUs.  One of the ways we can do this is by implementing parallel algorithms in our software.   One recent…
Introduction When many people think of the WebBrowser (http://msdn.microsoft.com/en-us/library/2te2y1x6%28v=VS.85%29.aspx) control, they immediately think of a control which allows the viewing and navigation of web pages. While this is true, it's a…
This video shows how to quickly and easily deploy an email signature for all users in Office 365 and prevent it from being added to replies and forwards. (the resulting signature is applied on the server level in Exchange Online) The email signat…
As many of you are aware about Scanpst.exe utility which is owned by Microsoft itself to repair inaccessible or damaged PST files, but the question is do you really think Scanpst.exe is capable to repair all sorts of PST related corruption issues?
Suggested Courses

580 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