how to check that no row of DataGridViewCheckBoxColumn has been checked

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how to check that no row of DataGridViewCheckBoxColumn has been checked

in datagridview 4 columns and x nos of rows added

1st column is DataGridViewCheckBoxColumn

i want to know that not a single row of checkbox column is check

Posted 11-Aug-13 21:31pm

Omkaara

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Comments

Maciej Los 12-Aug-13 4:12am

Do you mean a header is checked or not?

3 solutions

Solution 1

From your question I assume two possibilities:

1) When DataGridView is NOT databound:

AFAIK, we can not get the values of a row cell(s) without looping through DataGridViewRowCollection.

One way to do so is using loop:

VB

Dim cnt As Integer = 0
For i As Integer = 0 To DataGridView1.Rows.Count - 1
    With DataGridView1.Rows(i).Cells("NameOfYourColumn")
        If (.Value = True) Then
            cnt += 1
            Exit For
        End If
    End With
Next
Debug.Print(cnt) ' If here it is greater than zero than some row is checked

using LINQ: (one line approach)

DataGridView1.Rows.Cast(Of DataGridViewRow).Where(Function(c) c.Cells("NameOfYourColumn").Value = True).Count() 
' If count > 0 then some row is checked

2. If DataGridView is databound:

We can make use of DataView[^] class or DataTable.Select[^] method. See the examples in the attached link.

Posted 12-Aug-13 8:15am

Shahan Ayyub

Updated 12-Aug-13 8:16am

v2

Comments

Maciej Los 12-Aug-13 17:37pm

+5!

Omkaara 14-Aug-13 7:36am

ya this is also cool one !!!

Solution 3

try this :

VB

dim x as integer = 0
for counter as integer = 0 to datagrid.rows.count -1
   if datagrid.rows(counter).cells(0).value = true then
      x = 1
      exit for
   else
      x = 0
   end if

if x = 0
    MessageBox.Show("No records selected.", "Null Value",                               MessageBoxButtons.OK,MessageBoxIcon.Information)
            Exit Sub
end if

Posted 22-Aug-13 15:52pm

Uknownymous

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Omkaara · Accepted Answer · 2013-08-14T01:34:00

Solution 2

i coded the easy solution for this

VB

Dim chkCOl As Boolean = False
     For i As Integer = 0 To dgvInv.Rows.Count - 1
         If dgvInv(1, i).Value = True Then
             chkCOl = True
' if any of row is checked  will com in this if condition 
'else i will get chkCOl  as false
              Exit For
         End If
     Next

where dgvInv is my datagridview

Posted 14-Aug-13 1:34am

Omkaara

Updated 16-Aug-13 0:11am

v2

Comments

Shahan Ayyub 14-Aug-13 14:11pm

You are still missing "Exit for" after "chkCOl = True" otherwise there will be a lack in performance. Every time your loop will run till the end when you are only interested in finding either checked or unchecked. Hope it makes sense :)

Omkaara 16-Aug-13 6:11am

opps i forgot

yogesh vaidya 21-Jun-18 20:13pm

i have 3 columns in datagridview 1 is prod_name 2 is prod_qty and 3 is chkbox
i want a solution that any of above columns was clicked i want to chkbox value=true for same row