VB.NET Hide/Delete column in gridview

I've got a page that imports a CSV file into a gridview called gvCensus.  I can't figure out how to hide (or preferably delete) a column.  In a separate sub I try to run gvCensus.Columns.RemoveAt(2) and it tells me the index is out of range.  At runtime the column names appear as F0, F1, F2, etc. but I cannot reference them by that name either.  Here is my code.

Protected Sub btnLoadCensus_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnLoadCensus.Click

        Dim DirInfo As New DirectoryInfo(Server.MapPath("UploadedFiles"))
        If DirInfo.Exists = False Then
            'If folder is not there, Create one.  
            Directory.CreateDirectory(Server.MapPath("UploadedFiles"))
        End If
        If btnBrowse.PostedFile IsNot Nothing Then
            btnBrowse.PostedFile.SaveAs(Server.MapPath(ResolveUrl("~/UploadedFiles/" & btnBrowse.FileName)))
        End If
        fileSavedPath = Server.MapPath(ResolveUrl("~/UploadedFiles/" & btnBrowse.FileName))

        lblSelectError.Visible = False
        stFilePathAndName = btnBrowse.PostedFile.FileName.ToString()
        fileName = btnBrowse.FileName
        filePath = Path.GetDirectoryName(fileSavedPath)

        'Try
        Dim MyConnection As System.Data.OleDb.OleDbConnection
        Dim DtSet As System.Data.DataSet
        Dim MyCommand As System.Data.OleDb.OleDbDataAdapter
        MyConnection = New System.Data.OleDb.OleDbConnection _
        ("provider=Microsoft.Jet.OLEDB.4.0; Data Source=" & filePath & "; Extended Properties=""Text;HDR=No;FMT=Delimited""")
        '("provider=Microsoft.Jet.OLEDB.4.0; Data Source='" & stFilePathAndName & "'; Extended Properties=Excel 8.0;")
        MyCommand = New System.Data.OleDb.OleDbDataAdapter("select * from [" & fileName & "]", MyConnection)
        '("select * from [Sheet1$]", MyConnection)
        MyCommand.TableMappings.Add("Table", "TestTable")
        DtSet = New System.Data.DataSet
        MyCommand.Fill(DtSet)
        gvCensus.DataSource = DtSet.Tables(0)
        gvCensus.DataBind()
        MyConnection.Close()

    End Sub