Virtual Sources Limitations
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#Sort Operations
Sort operations are disabled.
Do the following to enable sort operations:
- Use the GridControl‘s sort options (returned by the FetchEventArgsBase.SortOrder property) during the fetch operation.
- Set the ColumnBase.AllowSorting property to true to allow users to sort the GridControl‘s rows.
Refer to the following help topic for more information: Enable Sort Operations.
#Filter Operations
Filter operations are disabled.
Do the following to enable filter operations:
- Use the GridControl‘s filter (returned by the FetchEventArgsBase.Filter property) during the fetch operation.
- Set the ColumnBase.AllowFiltering property to true to allow users to filter the GridControl‘s rows.
Use the following properties to specify filters that the GridControl‘s column supports:
Property Description Column Base. Allowed Unary Filters Gets or sets unary filters that the Grid Control ‘s column supports.Column Base. Allowed Binary Filters Gets or sets binary filters that the Grid Control ‘s column supports.Column Base. Allowed Any Of Filters Gets or sets any of filters that the Grid Control ‘s column supports.Column Base. Allowed Date Time Filters Gets or sets date-time filters that the Grid Control ‘s column supports.Column Base. Allowed Between Filters Gets or sets between filters that the Grid Control ‘s column supports.
Refer to the following help topic for more information: Enable Filter Operations.
#Total Summaries
Total Summaries are disabled.
Do the following to show summaries:
- Handle the InfiniteAsyncSource.GetTotalSummaries event to get total summaries.
- Specify the GridControl.TotalSummary property to display total summaries in the GridControl.
Refer to the following help topic for more information: Display Summaries.
#Group Operations
Group operations are not supported.
#Edit Operations
Edit operations are disabled.
#Unbound Columns
- You can display unbound columns.
- You cannot use unbound columns to sort and group data or apply data summaries.
- If you calculate values on the data source side by multiple columns, use the VirtualSourceBase.CustomProperties property to specify custom PropertyDescriptors.
#Conditional Formatting
You can use the FormatCondition conditional formats only.
#Print and Export
The GridControl prints and exports only loaded rows.
#Selection
The DataControlBase.SelectAll method selects only loaded rows.
#Clipboard Operations
- You can copy grid data to the clipboard.
- Paste operations are not supported.