ASPxClientWebDocumentViewer.CustomizeParameterLookUpSource Event

Occurs each time a look-up editor is created for a report parameter.

Namespace: DevExpress.XtraReports.Web.Scripts

Assembly: DevExpress.XtraReports.v18.2.Web.Scripts.dll


public event ASPxClientWebDocumentViewerCustomizeParameterLookUpSourceEventHandler CustomizeParameterLookUpSource
Public Event CustomizeParameterLookUpSource As ASPxClientWebDocumentViewerCustomizeParameterLookUpSourceEventHandler

Handle the CustomizeParameterLookUpSource event to customize look-up parameter values.

The following example demonstrates how to sort look-up values of the categoryName parameter based on a custom rule. Declare an array that has category names in a sequence based on the required criterion. Then, check the parameter property of the event argument to identify the required parameter. Access look-up values using the items property and sort them using a custom sorting function, which compares indexes of categories in the array. Finally, pass a result to the dataSource property to apply changes.

<dx:AspxWebDocumentViewer ID="AspxWebDocumentViewer1" runat="server">
    <ClientSideEvents CustomizeParameterLookUpSource="function(s, e) {
        var sortRule = ['Produce', 'Meat/Poultry', 'Dairy Products',
            'Grains/Cereals', 'Seafood', 'Confections', 'Condiments', 'Beverages'];

        if( == 'categoryName') {
            e.items.sort(function(a, b) { 
                if (sortRule.indexOf(a.value) > sortRule.indexOf(b.value)) {
                    return 1;
                if (sortRule.indexOf(a.value) < sortRule.indexOf(b.value)) {
                    return -1;
                return 0;
            e.dataSource = new{ store: e.items});
See Also