Question 1

How to parse Elasticsearch date math expressions in C#?

Accepted Answer

Use the DateTimeRange.Parse or DateMath.Parse methods from Exceptionless.DateTimeExtensions. For example, DateTimeRange.Parse('now-1h/d', DateTime.Now) handles anchors, operations, and timezones, making it easy to integrate with Elasticsearch-like queries in .NET.

Question 2

Exceptionless.DateTimeExtensions vs NodaTime for date handling in .NET?

Accepted Answer

Exceptionless.DateTimeExtensions is best for parsing Elasticsearch-style date math and business day logic, while NodaTime offers more comprehensive date/time types, calendars, and timezone handling. Choose based on whether you need specific syntax support or broader temporal features.

Question 3

How to calculate business days with custom hours using this library?

Accepted Answer

Create a BusinessDay instance with your defined days and time ranges, then call IsBusinessDay. For instance, set business hours from 9 AM to 5 PM on weekdays and use it to check if a datetime falls within those limits, reducing manual logic.

Question 4

Does Exceptionless.DateTimeExtensions support timezone conversions?

Accepted Answer

Yes, it supports timezone-aware operations through TimeZoneInfo parameters in DateMath.Parse and preserves explicit timezones in date strings. However, for complex conversions beyond parsing, you may need additional .NET timezone handling.

Question 5

What are the performance implications of using date math parsing?

Accepted Answer

Parsing expressions dynamically adds runtime overhead compared to static code, which might affect latency in high-throughput systems. For simple operations, native .NET methods could be faster, but the library excels in complex query scenarios.

Question 6

How to handle inclusive and exclusive date boundaries in ranges?

Accepted Answer

Use bracket notation like '[start TO end]' for inclusive boundaries or '{start TO end}' for exclusive ones, following Elasticsearch rounding rules. The README explains how this affects rounding, e.g., inclusive boundaries round to maximize range, while exclusive ones minimize it.

Exceptionless.DateTimeExtensions

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