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Newbie: Quickly select rows based on unique value

Posted on 2004-09-03
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Last Modified: 2012-06-27
I have a grid with many columns. One column, however, has unique values. Is there any way of programmatically selecting the row corresponding to a value of 10, for example, without checking the contents of every cell in the column?  The grid is unbound.
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Question by:rdavis101
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5 Comments
 

Author Comment

by:rdavis101
ID: 11978585
Maybe use MyTable.PrimaryKey.IndexOf   ... but how?
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LVL 4

Expert Comment

by:Javert93
ID: 11981331
If you only want to show that one record, you can use a DataView to filter the results based on a column value.
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Author Comment

by:rdavis101
ID: 11981353
Actually what I'd like to do is update that one record...but if I have a table with 1000 records, and if it's the last row in the table, I'd rather not waste time by writing a routine to fine the record myself. I was hoping there was some "built in" way of doing it. With the Janus Grid, for example, there's a Find function that takes a value and a column as arguments.
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Accepted Solution

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Javert93 earned 50 total points
ID: 11981551
You can do that with the DataView:

    Private Sub UpdateRecord(ByVal dt As DataTable, ByVal id As Integer, ByVal ParamArray updateValsGoHere() As Object)
        Dim dv As New DataView(dt)

        dv.Sort = "pk_column_name"
        Dim rowIndex As Integer = dv.Find(id)
        If rowIndex < 0 Or rowIndex >= dt.Rows.Count Then
            ' The record wasn't found
        Else
            Dim dataRow As DataRow = dt.Rows(rowIndex)
            ' Do your update here using "dataRow", and be
            ' sure to call Update() on the data adapter
            ' to propogate the changes back to the database
        End If
    End Sub
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Author Comment

by:rdavis101
ID: 11981571
Thanks dude.
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