"svbridget" <svbrid***@discussions.microsoft.com> schreef in bericht
news:2EB523E0-5D2F-4A76-89E2-C42DE7C463BA@microsoft.com...
> Since upgrading to the 2.0 framework I am getting an error that was not
> present in 1.1.  I have a grid that is bound to a DataView, which was
> initialized with a DataTable.  I set up the initial rows & cols in the
> DataTable, create the DataView, and bind the grid to it.  After that, I
> try
> to add a column to DataTable.Columns, and I get this error:
>
> "There is no row at position 0."
>
>   at System.Data.DataView?.GetRecord?(Int32 recordIndex)
>   at System.Data.DataView?.GetRow?(Int32 index)
>   at System.Data.DataView?.UpdateDataRowViewCache?()
>   at System.Data.DataView?.OnListChanged?(ListChangedEventArgs? e)
>   at System.Data.DataView?.ColumnCollectionChanged?(Object sender,
> CollectionChangeEventArgs? e)
>   at System.Data.DataViewListener?.ColumnCollectionChanged?(Object sender,
> CollectionChangeEventArgs? e)
>   at
> System.Data.DataColumnCollection?.OnCollectionChanged?(CollectionChangeEventArgs?
> ccevent)
>   at System.Data.DataColumnCollection?.AddAt?(Int32 index, DataColumn?
> column)
>   at System.Data.DataColumnCollection?.Add(DataColumn? column)
>
> I can't fathom why the code for adding a column is trying to update the
> _row_ cache of the DataView.  Also it doesn't seem to matter that there
> actually is a row at position 0...
>
> As a workaround I am setting the DataView's DataTable to Nothing, adding
> the
> column, then setting the DataView's DataTable back to the DataTable.
>
> But if someone could explain why this is happening in 2.0 I would
> appreciate
> it.
>
> Thanks.
>
>

"Cor Ligthert [MVP]" wrote:

> SVBridget,
>
> Probably there is something wrong in your code, but that we cannot see.
> Mostly it helps if we can see that as well, because you cannot find the
> reason even with that code.
>
> Therefore maybe it will help if you show the relevant parts of that
>
> Cor
>
> "svbridget" <svbrid***@discussions.microsoft.com> schreef in bericht
> news:2EB523E0-5D2F-4A76-89E2-C42DE7C463BA@microsoft.com...
> > Since upgrading to the 2.0 framework I am getting an error that was not
> > present in 1.1.  I have a grid that is bound to a DataView, which was
> > initialized with a DataTable.  I set up the initial rows & cols in the
> > DataTable, create the DataView, and bind the grid to it.  After that, I
> > try
> > to add a column to DataTable.Columns, and I get this error:
> >
> > "There is no row at position 0."
> >
> >   at System.Data.DataView?.GetRecord?(Int32 recordIndex)
> >   at System.Data.DataView?.GetRow?(Int32 index)
> >   at System.Data.DataView?.UpdateDataRowViewCache?()
> >   at System.Data.DataView?.OnListChanged?(ListChangedEventArgs? e)
> >   at System.Data.DataView?.ColumnCollectionChanged?(Object sender,
> > CollectionChangeEventArgs? e)
> >   at System.Data.DataViewListener?.ColumnCollectionChanged?(Object sender,
> > CollectionChangeEventArgs? e)
> >   at
> > System.Data.DataColumnCollection?.OnCollectionChanged?(CollectionChangeEventArgs?
> > ccevent)
> >   at System.Data.DataColumnCollection?.AddAt?(Int32 index, DataColumn?
> > column)
> >   at System.Data.DataColumnCollection?.Add(DataColumn? column)
> >
> > I can't fathom why the code for adding a column is trying to update the
> > _row_ cache of the DataView.  Also it doesn't seem to matter that there
> > actually is a row at position 0...
> >
> > As a workaround I am setting the DataView's DataTable to Nothing, adding
> > the
> > column, then setting the DataView's DataTable back to the DataTable.
> >
> > But if someone could explain why this is happening in 2.0 I would
> > appreciate
> > it.
> >
> > Thanks.
> >
> >
>
>
>

"svbridget" <svbrid***@discussions.microsoft.com> schreef in bericht
news:474BCFB9-4C1B-4EC6-911A-3F05DFFE77C0@microsoft.com...
> Sure, here's the repro code.  Also as I noted previously this did not
> throw
> an error in 1.1.
>
> I am including the form code and the designer code below. Click Setup,
> then
> click Error, and the error will appear.
>
> I currently have two workarounds: a) set the dataview's datasource to
> nothing, add the column, then set it back to datatable b) take out
> beginloaddata and endloaddata.
>
> -B
>
> -------------------- BEGIN FORM CODE ------------------------
> Imports System.Data
>
> Public Class Form1
>
>    Private Sub cmdSetup_Click(ByVal sender As System.Object, ByVal e As
> System.EventArgs) Handles cmdSetup.Click
>        Dim table As DataTable = New DataTable("Flowchart")
>
>        Dim myDataColumn As DataColumn
>        myDataColumn = New DataColumn
>        myDataColumn.DataType = GetType(System.String)
>        myDataColumn.ColumnName = "Flowchart"
>        myDataColumn.AutoIncrement = False
>        myDataColumn.Caption = "Flowchart"
>        myDataColumn.Unique = False
>        table.Columns.Add(myDataColumn)
>
>        ' Hidden column for object type
>        myDataColumn = New DataColumn
>        myDataColumn.DataType = GetType(System.Double)
>        myDataColumn.ColumnName = "ObjectType"
>        myDataColumn.AutoIncrement = False
>        myDataColumn.Caption = "ObjectType"
>        myDataColumn.Unique = False
>        table.Columns.Add(myDataColumn)
>
>        ' hidden column for sort string
>        myDataColumn = New DataColumn
>        myDataColumn.DataType = GetType(System.String)
>        myDataColumn.ColumnName = "Sort"
>        myDataColumn.AutoIncrement = False
>        myDataColumn.Caption = "Sort"
>        myDataColumn.Unique = False
>        table.Columns.Add(myDataColumn)
>
>        Dim dataview As New DataView(table)
>        dataview.Sort = "ObjectType, Sort"
>        grdFlowChartOrig.DataSource = dataview
>
>        AddFlowChartRow(2, "A")
>        AddFlowChartRow(3, "B")
>        AddFlowChartRow(1, "C")
>        AddFlowChartRow(4, "D")
>
>        AddFlowChartColumn(table)
>        AddFlowChartColumn(table)
>        AddFlowChartColumn(table)
>
>        AddFlowChartRow(2, "A")
>        AddFlowChartRow(3, "B")
>        AddFlowChartRow(1, "C")
>        AddFlowChartRow(4, "D")
>
>        grdFlowChartOrig.Refresh()
>
>    End Sub
>
>
>    Private Sub cmdError_Click(ByVal sender As System.Object, ByVal e As
> System.EventArgs) Handles cmdError.Click
>        Dim objTable As DataTable = DirectCast(grdFlowChartOrig.DataSource,
> DataView).Table
>        Dim objView As DataView = DirectCast(grdFlowChartOrig.DataSource,
> DataView)
>
>        objTable.Rows.Clear()
>        objTable.BeginLoadData()
>        While objTable.Columns.Count > 3
>            objTable.Columns.RemoveAt(objTable.Columns.Count - 1)
>        End While
>
>        AddFlowChartRow(3, "E")
>        AddFlowChartRow(1, "E")
>        AddFlowChartRow(2, "E")
>
>        AddFlowChartColumn(objTable)
>        objTable.EndLoadData()
>        objTable.AcceptChanges()
>    End Sub
>
>
>    Public Sub AddFlowChartRow(ByVal nObjectType As Double, Optional ByVal
> strSort As String = "")
>        Static i As Integer = 0
>
>        Dim objTable As DataTable = DirectCast(grdFlowChartOrig.DataSource,
> DataView).Table
>        Dim objRow As DataRow = objTable.NewRow()
>        objRow(0) = "row" & CStr(i)
>        objRow(1) = nObjectType
>        objRow(2) = strSort
>        objTable.Rows.Add(objRow)
>        i = i + 1
>    End Sub
>
>    Public Sub AddFlowChartColumn(ByVal objTable As DataTable)
>        Static i As Integer = 0
>
>        Dim myDataColumn As New DataColumn
>        myDataColumn.DataType = GetType(System.String)
>        myDataColumn.ColumnName = "new column" & CStr(i)
>        myDataColumn.AutoIncrement = False
>        myDataColumn.Caption = "new column" & CStr(i)
>        myDataColumn.Unique = False
>        objTable.Columns.Add(myDataColumn) ' ERROR THROWN HERE
>
>        i = i + 1
>    End Sub
>
>
> End Class
>
> -------------------- END FORM CODE ---------------------------
>
>
>
> -------------------- BEGIN DESIGNER CODE --------------------
> <Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
> Partial Class Form1
>    Inherits System.Windows.Forms.Form
>
>    'Form overrides dispose to clean up the component list.
>    <System.Diagnostics.DebuggerNonUserCode()> _
>    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
>        Try
>            If disposing AndAlso components IsNot Nothing Then
>                components.Dispose()
>            End If
>        Finally
>            MyBase.Dispose(disposing)
>        End Try
>    End Sub
>
>    'Required by the Windows Form Designer
>    Private components As System.ComponentModel.IContainer
>
>    'NOTE: The following procedure is required by the Windows Form Designer
>    'It can be modified using the Windows Form Designer.
>    'Do not modify it using the code editor.
>    <System.Diagnostics.DebuggerStepThrough()> _
>    Private Sub InitializeComponent()
>        Me.grdFlowChartOrig = New System.Windows.Forms.DataGridView
>        Me.cmdSetup = New System.Windows.Forms.Button
>        Me.cmdError = New System.Windows.Forms.Button
>        CType(Me.grdFlowChartOrig,
> System.ComponentModel.ISupportInitialize).BeginInit()
>        Me.SuspendLayout()
>        '
>        'grdFlowChartOrig
>        '
>        Me.grdFlowChartOrig.ColumnHeadersHeightSizeMode =
> System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize
>        Me.grdFlowChartOrig.Location = New System.Drawing.Point(12, 35)
>        Me.grdFlowChartOrig.Name = "grdFlowChartOrig"
>        Me.grdFlowChartOrig.Size = New System.Drawing.Size(423, 169)
>        Me.grdFlowChartOrig.TabIndex = 0
>        '
>        'cmdSetup
>        '
>        Me.cmdSetup.Location = New System.Drawing.Point(454, 49)
>        Me.cmdSetup.Name = "cmdSetup"
>        Me.cmdSetup.Size = New System.Drawing.Size(100, 58)
>        Me.cmdSetup.TabIndex = 1
>        Me.cmdSetup.Text = "Setup"
>        Me.cmdSetup.UseVisualStyleBackColor = True
>        '
>        'cmdError
>        '
>        Me.cmdError.Location = New System.Drawing.Point(457, 129)
>        Me.cmdError.Name = "cmdError"
>        Me.cmdError.Size = New System.Drawing.Size(97, 58)
>        Me.cmdError.TabIndex = 2
>        Me.cmdError.Text = "Trigger Error"
>        Me.cmdError.UseVisualStyleBackColor = True
>        '
>        'Form1
>        '
>        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
>        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
>        Me.ClientSize = New System.Drawing.Size(580, 253)
>        Me.Controls.Add(Me.cmdError)
>        Me.Controls.Add(Me.cmdSetup)
>        Me.Controls.Add(Me.grdFlowChartOrig)
>        Me.Name = "Form1"
>        Me.Text = "Form1"
>        CType(Me.grdFlowChartOrig,
> System.ComponentModel.ISupportInitialize).EndInit()
>        Me.ResumeLayout(False)
>
>    End Sub
>    Friend WithEvents grdFlowChartOrig As System.Windows.Forms.DataGridView
>    Friend WithEvents cmdSetup As System.Windows.Forms.Button
>    Friend WithEvents cmdError As System.Windows.Forms.Button
>
> End Class
> ------------------------- END DESIGNER
> CODE ---------------------------------
>
>
> "Cor Ligthert [MVP]" wrote:
>
>> SVBridget,
>>
>> Probably there is something wrong in your code, but that we cannot see.
>> Mostly it helps if we can see that as well, because you cannot find the
>> reason even with that code.
>>
>> Therefore maybe it will help if you show the relevant parts of that
>>
>> Cor
>>
>> "svbridget" <svbrid***@discussions.microsoft.com> schreef in bericht
>> news:2EB523E0-5D2F-4A76-89E2-C42DE7C463BA@microsoft.com...
>> > Since upgrading to the 2.0 framework I am getting an error that was not
>> > present in 1.1.  I have a grid that is bound to a DataView, which was
>> > initialized with a DataTable.  I set up the initial rows & cols in the
>> > DataTable, create the DataView, and bind the grid to it.  After that, I
>> > try
>> > to add a column to DataTable.Columns, and I get this error:
>> >
>> > "There is no row at position 0."
>> >
>> >   at System.Data.DataView?.GetRecord?(Int32 recordIndex)
>> >   at System.Data.DataView?.GetRow?(Int32 index)
>> >   at System.Data.DataView?.UpdateDataRowViewCache?()
>> >   at System.Data.DataView?.OnListChanged?(ListChangedEventArgs? e)
>> >   at System.Data.DataView?.ColumnCollectionChanged?(Object sender,
>> > CollectionChangeEventArgs? e)
>> >   at System.Data.DataViewListener?.ColumnCollectionChanged?(Object
>> > sender,
>> > CollectionChangeEventArgs? e)
>> >   at
>> > System.Data.DataColumnCollection?.OnCollectionChanged?(CollectionChangeEventArgs?
>> > ccevent)
>> >   at System.Data.DataColumnCollection?.AddAt?(Int32 index, DataColumn?
>> > column)
>> >   at System.Data.DataColumnCollection?.Add(DataColumn? column)
>> >
>> > I can't fathom why the code for adding a column is trying to update the
>> > _row_ cache of the DataView.  Also it doesn't seem to matter that there
>> > actually is a row at position 0...
>> >
>> > As a workaround I am setting the DataView's DataTable to Nothing,
>> > adding
>> > the
>> > column, then setting the DataView's DataTable back to the DataTable.
>> >
>> > But if someone could explain why this is happening in 2.0 I would
>> > appreciate
>> > it.
>> >
>> > Thanks.
>> >
>> >
>>
>>
>>

"Cor Ligthert [MVP]" wrote:

> B,
>
> I tried it and did look even a quiet long while to it, I commit it is
> strange, maybe you can drop this code at
>
> http://connect.microsoft.com/Main/content/content.aspx?ContentID=2220
>
> Cor
>
> "svbridget" <svbrid***@discussions.microsoft.com> schreef in bericht
> news:474BCFB9-4C1B-4EC6-911A-3F05DFFE77C0@microsoft.com...
> > Sure, here's the repro code.  Also as I noted previously this did not
> > throw
> > an error in 1.1.
> >
> > I am including the form code and the designer code below. Click Setup,
> > then
> > click Error, and the error will appear.
> >
> > I currently have two workarounds: a) set the dataview's datasource to
> > nothing, add the column, then set it back to datatable b) take out
> > beginloaddata and endloaddata.
> >
> > -B
> >
> > -------------------- BEGIN FORM CODE ------------------------
> > Imports System.Data
> >
> > Public Class Form1
> >
> >    Private Sub cmdSetup_Click(ByVal sender As System.Object, ByVal e As
> > System.EventArgs) Handles cmdSetup.Click
> >        Dim table As DataTable = New DataTable("Flowchart")
> >
> >        Dim myDataColumn As DataColumn
> >        myDataColumn = New DataColumn
> >        myDataColumn.DataType = GetType(System.String)
> >        myDataColumn.ColumnName = "Flowchart"
> >        myDataColumn.AutoIncrement = False
> >        myDataColumn.Caption = "Flowchart"
> >        myDataColumn.Unique = False
> >        table.Columns.Add(myDataColumn)
> >
> >        ' Hidden column for object type
> >        myDataColumn = New DataColumn
> >        myDataColumn.DataType = GetType(System.Double)
> >        myDataColumn.ColumnName = "ObjectType"
> >        myDataColumn.AutoIncrement = False
> >        myDataColumn.Caption = "ObjectType"
> >        myDataColumn.Unique = False
> >        table.Columns.Add(myDataColumn)
> >
> >        ' hidden column for sort string
> >        myDataColumn = New DataColumn
> >        myDataColumn.DataType = GetType(System.String)
> >        myDataColumn.ColumnName = "Sort"
> >        myDataColumn.AutoIncrement = False
> >        myDataColumn.Caption = "Sort"
> >        myDataColumn.Unique = False
> >        table.Columns.Add(myDataColumn)
> >
> >        Dim dataview As New DataView(table)
> >        dataview.Sort = "ObjectType, Sort"
> >        grdFlowChartOrig.DataSource = dataview
> >
> >        AddFlowChartRow(2, "A")
> >        AddFlowChartRow(3, "B")
> >        AddFlowChartRow(1, "C")
> >        AddFlowChartRow(4, "D")
> >
> >        AddFlowChartColumn(table)
> >        AddFlowChartColumn(table)
> >        AddFlowChartColumn(table)
> >
> >        AddFlowChartRow(2, "A")
> >        AddFlowChartRow(3, "B")
> >        AddFlowChartRow(1, "C")
> >        AddFlowChartRow(4, "D")
> >
> >        grdFlowChartOrig.Refresh()
> >
> >    End Sub
> >
> >
> >    Private Sub cmdError_Click(ByVal sender As System.Object, ByVal e As
> > System.EventArgs) Handles cmdError.Click
> >        Dim objTable As DataTable = DirectCast(grdFlowChartOrig.DataSource,
> > DataView).Table
> >        Dim objView As DataView = DirectCast(grdFlowChartOrig.DataSource,
> > DataView)
> >
> >        objTable.Rows.Clear()
> >        objTable.BeginLoadData()
> >        While objTable.Columns.Count > 3
> >            objTable.Columns.RemoveAt(objTable.Columns.Count - 1)
> >        End While
> >
> >        AddFlowChartRow(3, "E")
> >        AddFlowChartRow(1, "E")
> >        AddFlowChartRow(2, "E")
> >
> >        AddFlowChartColumn(objTable)
> >        objTable.EndLoadData()
> >        objTable.AcceptChanges()
> >    End Sub
> >
> >
> >    Public Sub AddFlowChartRow(ByVal nObjectType As Double, Optional ByVal
> > strSort As String = "")
> >        Static i As Integer = 0
> >
> >        Dim objTable As DataTable = DirectCast(grdFlowChartOrig.DataSource,
> > DataView).Table
> >        Dim objRow As DataRow = objTable.NewRow()
> >        objRow(0) = "row" & CStr(i)
> >        objRow(1) = nObjectType
> >        objRow(2) = strSort
> >        objTable.Rows.Add(objRow)
> >        i = i + 1
> >    End Sub
> >
> >    Public Sub AddFlowChartColumn(ByVal objTable As DataTable)
> >        Static i As Integer = 0
> >
> >        Dim myDataColumn As New DataColumn
> >        myDataColumn.DataType = GetType(System.String)
> >        myDataColumn.ColumnName = "new column" & CStr(i)
> >        myDataColumn.AutoIncrement = False
> >        myDataColumn.Caption = "new column" & CStr(i)
> >        myDataColumn.Unique = False
> >        objTable.Columns.Add(myDataColumn) ' ERROR THROWN HERE
> >
> >        i = i + 1
> >    End Sub
> >
> >
> > End Class
> >
> > -------------------- END FORM CODE ---------------------------
> >
> >
> >
> > -------------------- BEGIN DESIGNER CODE --------------------
> > <Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
> > Partial Class Form1
> >    Inherits System.Windows.Forms.Form
> >
> >    'Form overrides dispose to clean up the component list.
> >    <System.Diagnostics.DebuggerNonUserCode()> _
> >    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
> >        Try
> >            If disposing AndAlso components IsNot Nothing Then
> >                components.Dispose()
> >            End If
> >        Finally
> >            MyBase.Dispose(disposing)
> >        End Try
> >    End Sub
> >
> >    'Required by the Windows Form Designer
> >    Private components As System.ComponentModel.IContainer
> >
> >    'NOTE: The following procedure is required by the Windows Form Designer
> >    'It can be modified using the Windows Form Designer.
> >    'Do not modify it using the code editor.
> >    <System.Diagnostics.DebuggerStepThrough()> _
> >    Private Sub InitializeComponent()
> >        Me.grdFlowChartOrig = New System.Windows.Forms.DataGridView
> >        Me.cmdSetup = New System.Windows.Forms.Button
> >        Me.cmdError = New System.Windows.Forms.Button
> >        CType(Me.grdFlowChartOrig,
> > System.ComponentModel.ISupportInitialize).BeginInit()
> >        Me.SuspendLayout()
> >        '
> >        'grdFlowChartOrig
> >        '
> >        Me.grdFlowChartOrig.ColumnHeadersHeightSizeMode =
> > System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize
> >        Me.grdFlowChartOrig.Location = New System.Drawing.Point(12, 35)
> >        Me.grdFlowChartOrig.Name = "grdFlowChartOrig"
> >        Me.grdFlowChartOrig.Size = New System.Drawing.Size(423, 169)
> >        Me.grdFlowChartOrig.TabIndex = 0
> >        '
> >        'cmdSetup
> >        '
> >        Me.cmdSetup.Location = New System.Drawing.Point(454, 49)
> >        Me.cmdSetup.Name = "cmdSetup"
> >        Me.cmdSetup.Size = New System.Drawing.Size(100, 58)
> >        Me.cmdSetup.TabIndex = 1
> >        Me.cmdSetup.Text = "Setup"
> >        Me.cmdSetup.UseVisualStyleBackColor = True
> >        '
> >        'cmdError
> >        '
> >        Me.cmdError.Location = New System.Drawing.Point(457, 129)
> >        Me.cmdError.Name = "cmdError"
> >        Me.cmdError.Size = New System.Drawing.Size(97, 58)
> >        Me.cmdError.TabIndex = 2
> >        Me.cmdError.Text = "Trigger Error"
> >        Me.cmdError.UseVisualStyleBackColor = True
> >        '
> >        'Form1
> >        '
> >        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
> >        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
> >        Me.ClientSize = New System.Drawing.Size(580, 253)
> >        Me.Controls.Add(Me.cmdError)
> >        Me.Controls.Add(Me.cmdSetup)
> >        Me.Controls.Add(Me.grdFlowChartOrig)
> >        Me.Name = "Form1"
> >        Me.Text = "Form1"
> >        CType(Me.grdFlowChartOrig,
> > System.ComponentModel.ISupportInitialize).EndInit()
> >        Me.ResumeLayout(False)
> >
> >    End Sub
> >    Friend WithEvents grdFlowChartOrig As System.Windows.Forms.DataGridView
> >    Friend WithEvents cmdSetup As System.Windows.Forms.Button
> >    Friend WithEvents cmdError As System.Windows.Forms.Button
> >
> > End Class
> > ------------------------- END DESIGNER
> > CODE ---------------------------------
> >
> >
> > "Cor Ligthert [MVP]" wrote:
> >
> >> SVBridget,
> >>
> >> Probably there is something wrong in your code, but that we cannot see.
> >> Mostly it helps if we can see that as well, because you cannot find the
> >> reason even with that code.
> >>
> >> Therefore maybe it will help if you show the relevant parts of that
> >>
> >> Cor
> >>
> >> "svbridget" <svbrid***@discussions.microsoft.com> schreef in bericht
> >> news:2EB523E0-5D2F-4A76-89E2-C42DE7C463BA@microsoft.com...
> >> > Since upgrading to the 2.0 framework I am getting an error that was not
> >> > present in 1.1.  I have a grid that is bound to a DataView, which was
> >> > initialized with a DataTable.  I set up the initial rows & cols in the
> >> > DataTable, create the DataView, and bind the grid to it.  After that, I
> >> > try
> >> > to add a column to DataTable.Columns, and I get this error:
> >> >
> >> > "There is no row at position 0."
> >> >
> >> >   at System.Data.DataView?.GetRecord?(Int32 recordIndex)
> >> >   at System.Data.DataView?.GetRow?(Int32 index)
> >> >   at System.Data.DataView?.UpdateDataRowViewCache?()
> >> >   at System.Data.DataView?.OnListChanged?(ListChangedEventArgs? e)
> >> >   at System.Data.DataView?.ColumnCollectionChanged?(Object sender,
> >> > CollectionChangeEventArgs? e)
> >> >   at System.Data.DataViewListener?.ColumnCollectionChanged?(Object
> >> > sender,
> >> > CollectionChangeEventArgs? e)
> >> >   at
> >> > System.Data.DataColumnCollection?.OnCollectionChanged?(CollectionChangeEventArgs?
> >> > ccevent)
> >> >   at System.Data.DataColumnCollection?.AddAt?(Int32 index, DataColumn?
> >> > column)
> >> >   at System.Data.DataColumnCollection?.Add(DataColumn? column)
> >> >
> >> > I can't fathom why the code for adding a column is trying to update the
> >> > _row_ cache of the DataView.  Also it doesn't seem to matter that there
> >> > actually is a row at position 0...
> >> >
> >> > As a workaround I am setting the DataView's DataTable to Nothing,
> >> > adding
> >> > the
> >> > column, then setting the DataView's DataTable back to the DataTable.
> >> >
> >> > But if someone could explain why this is happening in 2.0 I would
> >> > appreciate
> >> > it.
> >> >
> >> > Thanks.
> >> >
> >> >
> >>
> >>
> >>
>
>
>