Datagridview Computation in vb

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Good afternoon experts, i just want to ask if anyone knows how to calculate totalamount in datagridview.this is how it looks:

Stocks Item Description Price Sold Quantity
4 COke 5 2 i am the one who will input in this cell

the first three columns are displayed by sql query and i want to know how can i add a new column next to the PRICE?. BTW, the result of the computation of price and sold quantity will be displayed at my textbox. thanks!

Posted 5-Jan-14 19:41pm

Chester Costa

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Raghubir_Sarkar · Accepted Answer · 2014-01-05T22:12:00

Hi,

1. Table structure

ID Item Quantity Rate Remark
1 Coke 20 35 Nothing
2 Chips 12 10 Nothing
3 Item1 45 40 Nothing
4 Item2 60 78 Nothing
5 Item3 40 112 Nothing

2. Lets Bind it in a grid, add a new column name Total next to Rate column, calculate Total = quantity * rate.

3. To bind the grid use datatable as

VB

Dim conn As New OleDb.OleDbConnection
Dim da As New OleDb.OleDbDataAdapter
Dim dt As New DataTable

da = New OleDb.OleDbDataAdapter("Select * from Temp", conn)
da.Fill(dt)

3. Add a new column next to Rate column as -

VB

Dim cl As New DataColumn
        cl = dt.Columns.Add("Total")
        cl.SetOrdinal(4)

4. Calculation Part

VB

Dim Rate As Integer
        Dim Quanity As Integer
        Dim Total As Integer

        For i As Integer = 0 To dt.Rows.Count - 1
            Quanity = CInt(dt.Rows(i)(2))
            Rate = CInt(dt.Rows(i)(3))
            Total = Quanity * Rate

            dt.Rows(i)(4) = Total
        Next

5. Data binding

DataGridView1.DataSource = dt

Done.