Manage the max data count for chart report items in Bold Reports®

In the Bold Reports® Web Report Designer, the MaxDataCount property sets the maximum number of data points that a chart can display. When handling millions or billions of data points, rendering charts in the preview can take significant time, potentially leading to UI crashes.

Why does the chart have a max data count?

The MaxDataCount property in the Bold Reports® Web Report Designer helps prevent preview issues by displaying a user-friendly error message when the threshold limit is exceeded. Based on this message, you are informed and can then apply filters to the dataset to optimize performance and ensure smooth report rendering.

NOTE: This user-friendly message is applicable only in the designer UI, ensuring that users are informed at design time to make necessary adjustments for smooth report generation.

How do I configure the Max Data Count property?

You configure the Max Data Count property in the Preview Data Limit section of the Web Report Designer Properties pane.

  1. Select the chart and go to the Properties pane.

  2. Navigate to the Preview Data Limit section.

    Preview Data Limit

  3. Set a Max Data Count for the chart report item.

    Max Data Count

What is the default Max Data Count value?

The Web Report Designer shows the default value for MaxDataCount in the following image.

Max Data Count Default

What happens when the data exceeds the limit?

If the data exceeds the Max Data Count limit, the Web Report Designer displays a user-friendly error message in the designer UI. The message indicates that the data exceeds the allowable range.

User-friendly Error Message

What are the best practices for Max Data Count?

Use these Bold Reports® best practices to balance chart performance and data size:

  1. For smaller datasets, use the default Max Data Count setting for optimal performance.
  2. For larger datasets, adjust the property only if necessary to avoid design-time or runtime performance issues and consider filtering your data source to reduce the data count to faster the rendering process.

By leveraging the MaxDataCount property, you can create efficient and user-friendly reports that balance performance and data visualization.

Frequently asked questions

Is the Max Data Count message shown in the report preview at runtime?

No. The user-friendly message is applicable only in the designer UI, so you are informed at design time.

What should I do when a chart exceeds the Max Data Count?

Apply filters to the dataset to reduce the data count. This optimizes performance and ensures smooth report rendering.

See also