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When you are using Custom Sorting
approach for sorting your grid, RadGrid displays the sorting icons but does not actually sort the data. Instead, you must perform the custom sorting inside the SortCommand event handler.
In our demo we are sorting the grid depending on which column has been clicked. For MultiColumn custom sorting you may use RadGrid1.MasterTableView.SortExpressions (RadGrid1 being the ID of the RadGrid) where information about current sorting expressions is stored. Then you may proceed with your custom sorting logic depending on the current sorting state of every column in the grid.
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