The DevExpress ASP.NET Grid View (ASPxGridView) provides a preview feature that allows each data row to display a preview section, similar to Microsoft Outlook. Preview rows are non-editable regions that allow large memo fields or custom data to be displayed across all columns in the ASPxGridView.
Preview rows are enabled if the Settings.ShowPreview option is set to true.
Preview rows are empty by default. Set the PreviewFieldName property to the required field in the data source to bind the preview rows with data.
Use the GetPreviewText method to get the text displayed within the specified preview row.
Use the Styles.PreviewRow property to access the style settings used to paint preview rows.
Use the Templates.PreviewTemplate property to provide a template used for rendering preview rows.