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How to add a new row in datagridview in vb.net that calculates totals for columns

Posted on 2010-11-13
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Last Modified: 2012-05-10
Hi,
I have populated datagridview from sql server database...
Datagridview has 5 colums...
First column is varchar column type and the rest are float....
The datagridview counts 15 rows....
I would like to add 16 th row to show sum of each respective column...It should look like

TOTAL    Sum(column1)    Sum(Column2)  Sum (Column3)     Sum(Column4)

Can someone help me to make this working....
Thanks...
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Question by:alsam
  • 2
4 Comments
 
LVL 17

Expert Comment

by:nepaluz
ID: 34128830
try this

'insert your column
Dim NewColumn As New DataGridViewColumn
Form1.DataGridView1.Columns.Insert(16, NewColumn)
Dim ColumnsToAdd As New List(Of Integer) From {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
For x = 0 To Form1.DataGridView1.RowCount - 1
    Form1.DataGridView1.Item(16, x).Value = SumColumns(ColumnsToAdd, x)
Next

'and alsoadd this function
Function SumColumns(ByVal columns As List(Of Integer), ByVal row As Integer) As Double

Dim q As Double = 0.0
For Each y As Integer In columns
    Try
        q = Form1.DataGridView1.Item(y, row).Value + q
    Catch ex As Exception
    End Try
Next
Return q

End Function

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LVL 17

Expert Comment

by:nepaluz
ID: 34128837
Actually, you have to remove the 16 from the list that calls the function.
0
 
LVL 35

Expert Comment

by:Miguel Oz
ID: 34129183
See code below:

For more datagridview usage check:
http://dotnetperls.com/datagridview-vbnet
'insert total row
Dim totalIndex As Integer = DataGridView1.Rows.Add()
'calculate totals
For x = 1 To Form1.DataGridView1.ColCount - 1
    Form1.DataGridView1.Rows.Item(totalIndex).Cells(x).Value = SumColumns(x)
Next

Function SumColumns(ByVal col As Integer) As Double

Dim q As Double = 0.0
For x = 0 To Form1.DataGridView1.RowCount - 2
    q = Form1.DataGridView1.Item(x).Cells(col).Value + q
Next
Return q

End Function

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LVL 83

Accepted Solution

by:
CodeCruiser earned 500 total points
ID: 34131209
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