How to return unique values from server end for excel filter checkbox ?

This knowledge base explains how to return unique values from the server end for excel filter checkbox values.

Solution:

By default, if we bind more than 1000 records in Grid then the excel filter will show only distinct values from the first 1000 records of Grid dataSource. If we have one distinct value from the first 1000 records, then it will return only one distinct value from server end.

To overcome this, we need to return the 1000 (default value of MaximunFilterChoice) distinct values of entire Grid dataSource from the server, by passing the filtering column name to server end through the actionBegin event of ejGrid and based on that we can get the distinct values from server end.

1. The Grid initialization as follows.

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2. In the Client side actionBegin event we can get the filtering column name and we set it to the select query of Grid.

Result:

Figure 1: Shown some unique values in excel filter dialog for CustomerID column in Grid.