Join Olivia Stone for an in-depth discussion in this video Rearrange data with the orderby operator, part of LINQ with C# Essential Training.
- In general, LINQ Queries tried to preserve…the original order of the sequence.…However, there are often times when it can be…extremely useful to reorder the sequence…based on a different criteria.…LINQ can do that by using an ordering operator.…The Orderby operator allows you to order the elements…in the sequence by a specific key.…You can think of how you can organize data in Excel…and rearrange the order based on a specific column.…I want to write a query to order the customers…based on the state that they live in…to help group those that live in the place together.…
I call this query "orderbyStateQuery"…To use the Orderby operator in my query,…I need to specify the property to base the order on.…In this case, the value of the state property…and the customer class.…The query expression ends with a select clause…that returns all the reordered customer elements.…Now that I've created the query,…I'll set up before each statement to execute it.…For every element that is in the resulting sequence…from the orderbyStateQuery,…
Author
Olivia Stone
Released
11/30/2015In LINQ with C# Essential Training, engineer Olivia Chiu introduces techniques for querying, updating, and transforming data with LINQ. She covers standard queries—such as finding overlaps in two datasets and creating hierarchies—as well as complex chained queries. She also shows how to group and join LINQ queries with lambda expressions, and use LINQ to query SQL databases and XML documents. Last but not least, Olivia provides tips for optimizing the performance of your queries.
- Creating and executing a LINQ query
- Returning results
- Changing the data source type
- Performing standard queries
- Working with lambda expressions
- Chaining and complex queries
- Querying SQL and XML
- Performing tree queries
- Using sequences, elements, and scalars
- Allocating memory
Skill Level Intermediate
Duration
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Introduction
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Welcome51s
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Use the exercise files1m 6s
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1. Introduction to LINQ
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Common use cases1m 45s
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2. Basic LINQ Queries
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Select a data source3m 6s
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Create a query1m 33s
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Execute a query1m 56s
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3. Data Transformation
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Return results as a new type1m 39s
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4. Type Relationships
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5. Standard Queries
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Parse basic groups4m 30s
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Create hierachy in a dataset3m 50s
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6. Lambda Expressions
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Lambda expressions3m 25s
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Index and distinct operators2m 22s
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Take and skip operators2m 47s
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7. Complex Queries
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Chaining2m 9s
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Use the into keyword3m 45s
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Use the let keyword3m 4s
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8. LINQ to SQL
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Database setup3m 58s
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Database query1m 48s
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Database updates2m 56s
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9. LINQ to XML
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Tree creation4m 10s
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Tree queries1m 43s
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10. Other Operators
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11. Performance
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Memory allocation1m 54s
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Best practices1m 40s
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Conclusion
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Next steps44s
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Video: Rearrange data with the orderby operator