Hello Jeff,

In order to add several date filtering condition to a grid column you should create filtering expression tree. Here is what you need to do:

First create your start and end date conditions like this:

const startDate = new Date(2012,1,2);
const startDateCondition = IgxDateFilteringOperand.instance().condition('after');
const startDateExpression = {
     condition: startDateCondition,
     fieldName: "OrderDate",
     searchVal: startDate
};

const endDate = new Date(2018,1,2);
const endDateCondition = IgxDateFilteringOperand.instance().condition('before');
const endDateExpression = {
     condition: endDateCondition,
     fieldName: "OrderDate",
     searchVal: endDate
};

Then create filtering expression tree for your date column, where these two conditions will be added and add both conditions:

const dateFilteringExpressionsTree = new FilteringExpressionsTree(FilteringLogic.And, "OrderDate");
dateFilteringExpressionsTree.filteringOperands.push(startDateExpression);
dateFilteringExpressionsTree.filteringOperands.push(endDateExpression);

Finally create expression tree for your grid and add to its filtering operands date filtering expression tree:

const gridFilteringExpressionsTree = new FilteringExpressionsTree(FilteringLogic.And);
gridFilteringExpressionsTree.filteringOperands.push(dateFilteringExpressionsTree);

To apply this filter set the grid filtering expression tree to your grid:

this.grid1.filteringExpressionsTree = gridFilteringExressionsTree;

Please let me know if this answer your question or if you need any further assistance on this matter.

Sincerely,
Milko
Software Developer