Added new kb article create-filter-pie-chart-multiple-parameters-tele…

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Co-authored-by: KB Bot <[email protected]>
Co-authored-by: Dimitar Nikolov <[email protected]>
Co-authored-by: Todor Arabadzhiev <[email protected]>

knowledge-base/create-filter-pie-chart-multiple-parameters-telerik-reporting.md

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+---
+title: Creating and Filtering a Pie Chart
+description: "Learn how to create a pie chart and apply filtering with multivalue report parameters in Telerik Reporting."
+type: how-to
+page_title: How to Create and Filter a Pie Chart
+slug: create-filter-pie-chart-multiple-parameters-telerik-reporting
+tags: reporting, pie chart, filter, parameters
+res_type: kb
+ticketid: 1659572
+---
+
+## Environment
+
+| Product | Progress® Telerik® Reporting |
+| --- | --- |
+| Version | 18.1.24.514 |
+
+## Description
+
+Creating a pie chart that supports filtering with a multivalue report parameter that allows for dynamic data visualization based on user selection. This KB article also answers the following questions:
+
+- How can I add multiple parameters to a Telerik Reporting report?
+- How do I apply filtering based on these parameters?
+- What steps are necessary to allow end-user selection for pie chart data?
+
+## Solution
+
+To create and filter a pie chart with multiple parameters in Telerik Reporting, follow these steps:
+
+1. **Create a Pie Chart:** Refer to the [Creating and Customizing Pie Charts]({%slug telerikreporting/designing-reports/report-structure/graph/chart-types/pie-charts/overview%}) documentation for detailed instructions on how to create a sample Pie chart.
+1. **Add Report Parameters:** These parameters will be connected to the graph filter for dynamic data visualization. For guidance on adding report parameters, refer to - [Approaches for Adding Report Parameters]({%slug telerikreporting/designing-reports/connecting-to-data/report-parameters/how-to-add-report-parameters%}).
+1. **Configure the Parameters with the [Report Parameter Collection Editor]({%slug telerikreporting/designing-reports/report-designer-tools/desktop-designers/tools/reportparameter-collection-editor%}):** We will create a `MultiValue` report parameter that will be used to filter the data but all values will be selected initially. In the "Report Parameter Collection Editor", set the `MultiValue` option to `True` and adjust the `Value`. Use the `Edit Expression` dialog to select `"Functions" -> "Aggregates" -> "AllDistinctValues"`. The expression for the `Value` property of the report parameter will look like `= AllDistinctValue(Fields.StoreName)`. This configuration allows the parameter to accept multiple values for filtering and select all distinct options for the `ValueMember`.
+
+    ![An image of the setup of the MultiValue Report Parameter used for the Pie Chart filter](images/report-parameter-multivalue-setup-for-graph-filter.png)
+
+1. **Connect the Parameter to the Pie Chart Filter:** To enable filtering based on the parameter, access the pie chart's `Edit Filters` option and set the `Operator` to `In`. This connects the report parameter to the chart, enabling end-user selection and filtering - [Adding Filtering to Graph Item]({%slug telerikreporting/designing-reports/connecting-to-data/data-items/filtering-data/how-to-add-filtering-to-graph-item%}).
+
+    ![An image of the filter applied to the Pie Chart](images/pie-chart-sample-filter-for-multivalue-parameter.png)
+
+In the end, when previewed(for example in the [HTML5 Report Viewer]({%slug telerikreporting/using-reports-in-applications/display-reports-in-applications/web-application/html5-report-viewer/overview%})), the pie chart will look as follows:
+
+![An image of the pie chart with the filtered applied to it and previewed in the HTML5 Report Viewer](images/pie-chart-filtered-view-in-web-report-viewer.png)
+
+## See Also
+
+- [Approaches for Adding Report Parameters]({%slug telerikreporting/designing-reports/connecting-to-data/report-parameters/how-to-add-report-parameters%})
+- [Creating and Customizing Pie Charts]({%slug telerikreporting/designing-reports/report-structure/graph/chart-types/pie-charts/overview%})
+- [Adding Filtering to Graph Item]({%slug telerikreporting/designing-reports/connecting-to-data/data-items/filtering-data/how-to-add-filtering-to-graph-item%})