[VB.NET]如何在Datagridview中进行列间的计算?

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如何在Datagridview中进行列间的计算?
举例:
Datagridview有三列,分别是price、quaty、sum
我想设置成sum=price*quaty
在论坛搜了一下贴，发现类似的问题不少，但我还是没有解决，请知道的兄弟指教，多谢
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具体困难在哪儿？
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我是由VFP刚转VB.NET的,在VFP中处理很简单:
replace sum with price*quaty
但在VB.net中,我不知道如何写这个代码
看过论坛里的一些贴子,有兄弟说在后台用SQL语句搞掂,但问题是我的datagridview的数据源是一个临时的Datatable,和后台没关啊。
楼上的兄弟，能否指教一二，感激啊！
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指教不敢当，呵呵。其实很简单，就是把前两项的数据相乘，放到第三项中。您只要会操作单元格中的数据自然就会了。写的潦草，还望见谅。

Public Class Form1

Dim conn As Data.OleDb.OleDbConnection
Dim da As Data.OleDb.OleDbDataAdapter
Dim ds As Data.DataSet

Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
DataGridView1.AllowUserToOrderColumns = False
conn = New OleDb.OleDbConnection( Provider=Microsoft.Jet.OleDb.4.0;Data Source=D:/data.mdb ) 假设表中有两项: price 和 quaty
conn.Open()
da = New OleDb.OleDbDataAdapter( SELECT * FROM 表1 , conn)
ds = New Data.DataSet
da.Fill(ds)
conn.Close()
DataGridView1.DataSource = ds.Tables(0)
DataGridView1.Columns.Add( sum , sum ) 加入一项 sum
For i As Int32 = 0 To DataGridView1.Rows.Count - 1
DataGridView1.Rows(i).Cells(2).Value = DataGridView1.Rows(i).Cells(0).Value * DataGridView1.Rows(i).Cells(1).Value 把前两项的数据相乘，放到第三项中
Next
End Sub

End Class
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可以在sql语句里相办法
select price、quaty、price*quaty as sum from ....
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在DataGridView的CellEndEdit事件中加入以下代码即可:

Private Sub dgrd4_CellEndEdit(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles dgrd4.CellEndEdit
Try

If Me.dgrd4.Rows(e.RowIndex).IsNewRow = False Then
If IsNumeric(Me.dgrd4.Rows(e.RowIndex).Cells( Price ).Value) = False Then
Me.dgrd4.Rows(e.RowIndex).Cells( Price ).Value = Math.Round(0, 2)
End If

If IsNumeric(Me.dgrd4.Rows(e.RowIndex).Cells( quaty ).Value) = False Then
Me.dgrd4.Rows(e.RowIndex).Cells( quaty ).Value = Math.Round(0, 2)
End If


Me.dgrd4.Rows(e.RowIndex).Cells( sum ).Value = Math.Round(Me.dgrd4.Rows(e.RowIndex).Cells( Price ).Value * Me.dgrd4.Rows(e.RowIndex).Cells( quaty ).Value, 2)
End If
End If

End If

Catch ex As Exception
MsgBox(ex.ToString, MsgBoxStyle.Critical + MsgBoxStyle.OkOnly)
End Try
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谢谢magicbacon(Cannot help coding)!
我要的就是:
For i As Int32 = 0 To DataGridView1.Rows.Count - 1
DataGridView1.Rows(i).Cells(2).Value = DataGridView1.Rows(i).Cells(0).Value * DataGridView1.Rows(i).Cells(1).Value 把前两项的数据相乘，放到第三项中
Next
感谢!散分
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也谢谢天地男儿!也是一正确方法!倦怠兄弟的办法我暂时没法用,S因为我在帖子里说了我没法到后台用SQL语句处理,不过,一并谢过了!我要多跟各位学习交流!
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