Sometimes Web developers have to sort the returned data. The LINQ orderby clause sorts the elements in the returned sequence according to the default comparer for the type being sorted. For example, the following query can be extended to sort the results based on the FirstName property. Because FirstName is a string, the default comparer performs an alphabetical …
LINQ Tutorials
Sometimes Web developers have to sort the returned data. The LINQ orderby clause sorts the elements in the returned sequence according to the default comparer for the type being sorted. For example, the following query can be extended to sort the results based on the FirstName property. Because FirstName is a string, the default comparer performs an alphabetical …
Web developers can create and call a method inline based on LINQ expression. For example they can create a function named TestClient() that examines a client an return true or false based on whether they want to include it in the results:
Private Function TestClient(ByVal client As Client) As Boolean
Return client.LastName.StartsWith(“D”)
End Function
Web developers could use the TestClient …
Web developers can create and call a method inline based on LINQ expression. For example they can create a function named TestClient() that examines a client an return true or false based on whether they want to include it in the results:
private bool TestClient(Client client)
{
return client.LastName.StartsWith(“T”);
}
Web developers could use the TestClient method like this:
var matches = …
Web developer can modify the where clause in LINQ statement to filter the results and to include only those that match a specific condition. The next code shows how to find clients who have a last name that starts with a specific letter:
Dim matches = From client In clients _
Where client.LastName.StartsWith(“D”) _
Select client
Web developer …
Web developer can modify the where clause in LINQ statement to filter the results and to include only those that match a specific condition. The next code shows how to find clients who have a last name that starts with a specific letter:
var matches = from client in clients
where client.LastName.StartsWith(“P“)
select client;
Web developer can combine …
Web developer can use approach described in the article How to use LINQ expression to get a subset of data in VB.NET to define a new class that wraps just the information he/she wants to return. For example, if he/she wants to get both the first and last names but he/she wants to store them in separate strings, …
Web developer can use approach described in the article How to use LINQ expression to get a subset of data in C# to define a new class that wraps just the information he/she wants to return. For example, if he/she wants to get both the first and last names but he/she wants to store them in separate strings, …
How to use LINQ expression to get a subset of data in VB.NET
In the article How LINQ expression is composed LINQ select clause was described. Web developer can change it to get a subset of data. For example, he/she could pull out a list of first name strings like this:
Dim matches = From client In clients _
select client.FirstName
or a list of strings with both first, middle and …
In the article How LINQ expression is composed LINQ select clause was described. Web developer can change it to get a subset of data. For example, he/she could pull out a list of first name strings like this:
var matches = from client in clients
select client.FirstName;
or a list of strings with both first, middle and last …