Data-aware export to CSV format - Controls now export cell display text, but not underlying values

What Changed
In data-aware export mode, the ExportToCsv methods of affected controls now export cell display text. Previous versions exported underlying cell values.

Reasons for Change
In previous versions, the controls' ExportToCsv methods exported cell values instead of text if the CsvExportOptionsEx.TextExportMode property was set to Text (default) in data-aware export mode.

Now, if the CsvExportOptionsEx.TextExportMode property is set to Text, the ExportToCsv methods export cell display text.

The current change does not affect WYSIWYG export mode.

Impact on Existing Apps

The default output of the ExportToCsv method is different for v20.1.4+ and previous versions.

• Export of Boolean Columns in Grid Controls
  v20.1.4+: Values of Boolean grid columns (true, false and null) are exported as "Checked", "Unchecked" and "Indeterminate" strings.
  Previous versions: Values of Boolean columns (true, false and null) are exported as "TRUE", "FALSE" and an empty string.
• Custom Display Text
  v20.1.4+: Custom display text provided for cells via events (for example, WinForms GridView.CustomColumnDisplayText, WPF GridControl.CustomColumnDisplayText, ASPxGridView.CustomColumnDisplayText, and ASPxVerticalGrid.CustomRowDisplayText) is taken into account
  Previous versions: Custom display text provided via these events is ignored.

How to Revert to Previous Behavior
To export cell values to CSV format, call the ExportToCsv method with a CsvExportOptionsEx object passed as the options parameter. Set the CsvExportOptionsEx.TextExportMode property to Value.

WinForms Data Grid:

C#
CsvExportOptionsEx optionsCsv = new CsvExportOptionsEx();
optionsCsv.TextExportMode = TextExportMode.Value;
gridView1.ExportToCsv(pathCsv, optionsCsv);

Visual Basic
Dim optionsCsv As New CsvExportOptionsEx
optionsCsv.TextExportMode = TextExportMode.Value
GridView1.ExportToCsv(pathCsv, optionsCsv)

ASP.NET Grid View:

ASPx
<dx:ASPxGridView ID="ASPxGridView1" runat="server" OnBeforeExport="ASPxGridView1_BeforeExport" .....  

C#
protected void ASPxGridView1_BeforeExport(object sender, DevExpress.Web.ASPxGridBeforeExportEventArgs e) {
    if(e.ExportTarget == ExportTarget.Csv) { 
        var opts = e.ExportOptions as CsvExportOptionsEx;
        opts.TextExportMode = TextExportMode.Value;
    }
}

Visual Basic
Protected Sub ASPxGridView1_BeforeExport(ByVal sender As Object, ByVal e As DevExpress.Web.ASPxGridBeforeExportEventArgs)
    If e.ExportTarget = ExportTarget.Csv Then
        Dim opts = TryCast(e.ExportOptions, CsvExportOptionsEx)
        opts.TextExportMode = TextExportMode.Value
    End If
End Sub