select data with 2 primary keys in gridview using vb

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Hye..

I have a gridview which is bound to a database with 2 primary keys.
Examples of the data are:

RefNo (PK) : 201207
LotNo (PK) : 4400
LotSize : 1000

Refno (PK) : 201207
LotNo (PK) : 4401
LotSize : 2000

VB code:

  Dim i As Integer = CType(e.CommandArgument, Integer)
Session("DATAKEYSELECT") = gdPartReg.DataKeys(i).Value.ToString()
If gdPartReg.DataKeys(i).Value.ToString() = Session("DATAKEYSELECT") Then
                    gdPartReg.Rows(i).BackColor = Drawing.Color.LightBlue
                Else
                    gdPartReg.Rows(i).BackColor = Drawing.Color.Empty
                End If

My gridview has a SELECT column. When I select the first row, and debug the code, I only got the RefNo as the datakey.
So, when I select the second row, it still highlight the first row because the Session("DATAKEYSELECT") is still 201207.

How can I modify my code so that I can retrieve the row with different keys (RefNo, LotNo).
TQ For ur response.

Posted 15-Jul-12 17:27pm

snamyna

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Karthik. A · Answer 1 · 2012-07-16T08:26:00

Common way is to way have a field which is the combination of both the fields. So if your class is

C#

class Something
{
   string Key1 { get; set; }
   string Key2 { get; set; }
}

Change it to

C#

class Something
{
   string Key { get { return string.Format("{0}|{1}", Key1, Key2); } set { } }
   string Key1 { get; set; }
   string Key2 { get; set; }
}

Now you can use "Key" as the primary key field for the grid and now you can uniquely identify every row.