I have tried a custom template for the data cells of DevExpress.Web.ASPxPivotGrid.PivotGridField is CellTemplate for 20 character limit
<dx:PivotGridField FieldName="FieldName" Area="DataArea" Caption="Caption">
<CellTemplate>
<div style="white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100px;">
<%# Eval("FieldName").ToString().Substring(0, Math.Min(Eval("FieldName").ToString().Length, 20)) %>
</div>
</CellTemplate>
</dx:PivotGridField>
and it shows Type 'DevExpress.Web.ASPxPivotGrid.PivotGridField' does not have a public property named 'CellTemplate'. so any correction or the alternative way I am looking for!