Tracking a row in a DataGridView regardless of sort?

because you never know what row it may be on, I would suggest a loop and search for the required field's value

Dim strChoice As String
Dim i As Integer = 0
For each objDR in objDS.Tables("STUFF").Rows
    if objDS.Tables("STUFF").Rows(i).Item("Name") = strChoice then
           '/// do your bloack here ///
           Exit For
    end if
Next

Would this get the type of thing you want??

John

Whoops, I forgot to increment the i value

Dim strChoice As String
Dim i As Integer = 0
For each objDR in objDS.Tables("STUFF").Rows
    if objDS.Tables("STUFF").Rows(i).Item("Name") = strChoice then
           '/// do your bloack here ///
           Exit For
    end if
     i += 1 '/// very important little integer ///
Next

Thanks for the quick response!

I came up with something similar to this and it does work as advertised.  However, this table in reality has 96 entries,12 columns and each column is updated 4 times a second.  A loop like this is pretty prohibitive considering the frequency in which its going to be run.

Is there no built in provision or non-loop alternative?

if you see the values from the underlying datatable that will be in the original order. only dataview is effected when you sort the gridview.

to test do the following.

in a new project add a gridview control to the default form.
now add the following code to the form load event.


Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

       
        For i As Integer = 0 To 5
            AddColumn(i)
        Next
        DataGridView1.DataSource = GetdataSource()

    End Sub

    Private Sub AddColumn(ByVal colIndex As Integer)
        Dim dataGridViewColumn As New DataGridViewTextBoxColumn

        With dataGridViewColumn
            .Name = "columnName" & colIndex.ToString
            .HeaderText = "headerText" & colIndex.ToString
            .DataPropertyName = "columnName" & colIndex.ToString
            .Width = 40
            .HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleCenter
            .ToolTipText = Nothing
        End With

        DataGridView1.Columns.Insert(0, dataGridViewColumn)


    End Sub

    Private Function GetdataSource() As DataTable
        Dim retList As New DataTable

        For i As Integer = 0 To 5
            retList.Columns.Add("columnName" & i)
        Next

        For i As Integer = 0 To 5
            Dim dr As DataRow = retList.NewRow

            For col As Integer = 0 To 5
                dr.Item("columnName" & col) = " Row :" & i.ToString & " Col :" & col.ToString
            Next

            retList.Rows.Add(dr)

        Next

        Return retList
    End Function

add two button controls to the form
and add the following code

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim rowCnt As Integer = CType(DataGridView1.DataSource, DataTable).Rows.Count
        Dim colCnt As Integer = CType(DataGridView1.DataSource, DataTable).Columns.Count
        Trace.WriteLine("Using Datatable")
        For rowNum As Integer = 0 To rowCnt - 1
            For colNum As Integer = 0 To colCnt - 1
                Trace.Write(CType(DataGridView1.DataSource, DataTable).Rows(rowNum).Item(colNum).ToString)
            Next
            Trace.WriteLine("")
        Next
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim rowCnt As Integer = CType(DataGridView1.DataSource, DataTable).Rows.Count
        Dim colCnt As Integer = CType(DataGridView1.DataSource, DataTable).Columns.Count
        Trace.WriteLine("Using Dataview")
        For rowNum As Integer = 0 To rowCnt - 1
            For colNum As Integer = 0 To colCnt - 1
                Trace.Write(CType(DataGridView1.DataSource, DataTable).DefaultView.Item(rowNum).Item(colNum).ToString)
            Next
            Trace.WriteLine("")
        Next
    End Sub

now run the program and click on any column header to sort the gridview and click button1 and button2 to see the results.

Appari, thanks!  I do see what that's doing.  But, now add a third button and this code to the project:

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        Trace.Write(DataGridView1.Item(0, 0).Value)
    End Sub

See what happens?  0,0 refers to two different cells, depending on the sort; its a relative addressing.  I need to count on 0,0 being a global address.  

That making any sense?

what i am saying is instead of reading it from datagridview get the values from datatable bounded to your grid view. if you know the address the value is same in datatable irrespectvie of where the data is displayed on the gridview.

Ok I think I follow you... but one last thing... Can you please edit the code above to show me how to update datasource cell 0,0 with a value, say "Test", on a press of a button, say Button 3?  I can't figure out how; all I seem to be able to do is update datagridview cell 0,0 (which as we've shown is relative to the sort)..  

Awesome!!  That is exactly the answer.  Points, and my thanks, for you appari!