| description | title | ms.date | ms.assetid |
|---|---|---|---|
Learn more about: Querying DataSets (LINQ to DataSet) |
Querying DataSets (LINQ to DataSet) |
03/30/2017 |
bb68d2e4-623d-4d60-85e3-965254f6fee7 |
After a xref:System.Data.DataSet object has been populated with data, you can begin querying it. Formulating queries with LINQ to DataSet is similar to using Language-Integrated Query (LINQ) against other LINQ-enabled data sources. Remember, however, that when you use LINQ queries over a xref:System.Data.DataSet object, you're querying an enumeration of xref:System.Data.DataRow objects instead of an enumeration of a custom type. This means that you can use any of the members of the xref:System.Data.DataRow class in your LINQ queries. This lets you create rich, complex queries.
As with other implementations of LINQ, you can create LINQ to DataSet queries in two different forms: query expression syntax and method-based query syntax. You can use query expression syntax or method-based query syntax to perform queries against single tables in a xref:System.Data.DataSet, against multiple tables in a xref:System.Data.DataSet, or against tables in a typed xref:System.Data.DataSet.
Single-Table Queries
Describes how to perform single-table queries.
Cross-Table Queries
Describes how to perform cross-table queries.
Querying Typed DataSets
Describes how to query typed xref:System.Data.DataSet objects.