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This article mainly explains "how to solve the LINQ to DataSet problem". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to solve the LINQ to DataSet problem.

Using LINQ to DataSet, you can query data cached in DataSet objects more quickly and easily. Specifically, LINQ to DataSet can simplify queries by enabling developers to write queries using the programming language itself rather than by using a separate query language. This is especially useful for Visual Studio developers who can now take advantage of compile-time syntax checking, static typing, and IntelliSense support provided by Visual Studio in their queries.

LINQ to DataSet can also be used to query data merged from one or more data sources. This enables many scenarios that require flexible representation and processing of data, such as querying locally aggregated data and middle-tier caching in Web applications. Specifically, general reporting, analysis, and business intelligence applications will require this method of operation.

LINQ to DataSet functionality is exposed primarily through extension methods in the DataRowExtensions and DataTableExtensions classes. LINQ to DataSet is generated based on and using the existing ADO.NET 2.0 architecture and cannot be replaced by ADO.NET 2.0 in application code. The existing ADO.NET 2. 0 code will continue to work in LINQ to DataSet applications.

Let's look at an example:

/ / Fill the DataSet. DataSet ds = new DataSet (); ds.Locale = CultureInfo.InvariantCulture FillDataSet (ds); DataTable products = ds.Tables ["Product"]; var query = from product in products.AsEnumerable () where! product.IsNull ("Color") & & (string) product ["Color"] = = "Red" select new {Name = product ["Name"], ProductNumber = product ["ProductNumber"], ListPrice = product ["ListPrice"]} Foreach (var product in query) {Console.WriteLine ("Name: {0}", product.Name); Console.WriteLine ("Product number: {0}", product.ProductNumber); Console.WriteLine ("List price: ${0}", product.ListPrice); Console.WriteLine ("");}

Use the example after the extension:

/ / Fill the DataSet. DataSet ds = new DataSet (); ds.Locale = CultureInfo.InvariantCulture; FillDataSet (ds); DataTable products = ds.Tables ["Product"]; var query = from product in products.AsEnumerable () where product.Field ("Color") = = "Red" select new {Name = product.Field ("Name"), ProductNumber = product.Field ("ProductNumber"), ListPrice = product.Field ("ListPrice")} Foreach (var product in query) {Console.WriteLine ("Name: {0}", product.Name); Console.WriteLine ("Product number: {0}", product.ProductNumber); Console.WriteLine ("List price: ${0}", product.ListPrice); Console.WriteLine (""); at this point, I believe you have a better understanding of "how to solve the LINQ to DataSet problem". Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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