C# Eval Expression LINQ Dynamic - Any

LINQ Dynamic Any Examples

C# Dynamic LINQ Any examples using an Expression Evaluator.

Any - Simple

This C# example uses the LINQ Any method with a dynamic expression to determine if any of the words in the array contain the substring 'ei'.

LINQ

string[] words = {"believe", "relief", "receipt", "field"};

var iAfterE = words.Any(w => w.Contains("ei"));

Console.WriteLine("There is a word that contains in the list that contains 'ei': {0}", iAfterE);

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LINQ Dynamic

string[] words = {"believe", "relief", "receipt", "field"};

var iAfterE = words.Any(w => "w.Contains('ei')");

Console.WriteLine("There is a word that contains in the list that contains 'ei': {0}", iAfterE);

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LINQ Execute

string[] words = {"believe", "relief", "receipt", "field"};

var iAfterE = words.Execute<bool>("Any(w => w.Contains('ei'))");		

Console.WriteLine("There is a word that contains in the list that contains 'ei': {0}", iAfterE);

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Result

highlight text %} LINQ Execute Test

There is a word that contains in the list that contains 'ei': True


## Any - Grouped
This C# example uses the LINQ Any method with a dynamic expression to return a grouped list of products only for categories that have at least one product that is out of stock.

### LINQ
```csharp
var products = getList();

var productGroups = products.GroupBy(p => p.Category)
	.Where(g => g.Any(p => p.UnitsInStock == 0))
	.Select(g => new {Category = g.Key, Products = g});

Console.WriteLine("Count before Any : " + products.Count());

int newCount = 0;

foreach (var group in productGroups) 
{
	newCount+= group.Products.Count();
}

Console.WriteLine("Count After Any : " + newCount);

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LINQ Dynamic

private void uiAny_Grouped_LINQ_Dynamic_Click(object sender, EventArgs e)
{
	var products = My.GetProductList();

	var productGroups = products.GroupBy(p => p.Category)
		.Where(g => g.Any(p => "p.UnitsInStock == 0"))
		.Select(g => new {Category = g.Key, Products = g});

	var sb = new StringBuilder();

	My.ObjectDumper.Write(sb, productGroups, 1);

	My.Result.Show(My.LinqResultType.LinqDynamic, uiResult, sb);
}

LINQ Execute

private void uiAny_Grouped_LINQ_Execute_Click(object sender, EventArgs e)
{
	var products = My.GetProductList();

	var productGroups = products.GroupBy(p => p.Category)
		.Where(g => g.Execute<bool>("Any(p => p.UnitsInStock == 0)"))
		.Select(g => new { Category = g.Key, Products = g });

	var sb = new StringBuilder();

	My.ObjectDumper.Write(sb, productGroups, 1);

	My.Result.Show(My.LinqResultType.LinqExecute, uiResult, sb);
}

Result

highlight text %} LINQ Execute Test

Category=Condiments Products=... Products: ProductID=3 ProductName=Aniseed Syrup Category=Condiments UnitPrice=10.0000 UnitsInStock=13 Products: ProductID=4 ProductName=Chef Anton's Cajun Seasoning Category=Condiments UnitPrice=22.0000 UnitsInStock=53 Products: ProductID=5 ProductName=Chef Anton's Gumbo Mix Category=Condiments UnitPrice=21.3500 UnitsInStock=0 Products: ProductID=6 ProductName=Grandma's Boysenberry Spread Category=Condiments UnitPrice=25.0000 UnitsInStock=120 Products: ProductID=8 ProductName=Northwoods Cranberry Sauce Category=Condiments UnitPrice=40.0000 UnitsInStock=6 Products: ProductID=15 ProductName=Genen Shouyu Category=Condiments UnitPrice=15.5000 UnitsInStock=39 Products: ProductID=44 ProductName=Gula Malacca Category=Condiments UnitPrice=19.4500 UnitsInStock=27 Products: ProductID=61 ProductName=Sirop d'érable Category=Condiments UnitPrice=28.5000 UnitsInStock=113 Products: ProductID=63 ProductName=Vegie-spread Category=Condiments UnitPrice=43.9000 UnitsInStock=24 Products: ProductID=65 ProductName=Louisiana Fiery Hot Pepper Sauce Category=Condiments UnitPrice=21.0500 UnitsInStock=76 Products: ProductID=66 ProductName=Louisiana Hot Spiced Okra Category=Condiments UnitPrice=17.0000 UnitsInStock=4 Products: ProductID=77 ProductName=Original Frankfurter grüne Soße Category=Condiments UnitPrice=13.0000 UnitsInStock=32 Category=Meat/Poultry Products=... Products: ProductID=9 ProductName=Mishi Kobe Niku Category=Meat/Poultry UnitPrice=97.0000 UnitsInStock=29 Products: ProductID=17 ProductName=Alice Mutton Category=Meat/Poultry UnitPrice=39.0000 UnitsInStock=0 Products: ProductID=29 ProductName=Thüringer Rostbratwurst Category=Meat/Poultry UnitPrice=123.7900 UnitsInStock=0 Products: ProductID=53 ProductName=Perth Pasties Category=Meat/Poultry UnitPrice=32.8000 UnitsInStock=0 Products: ProductID=54 ProductName=Tourtière Category=Meat/Poultry UnitPrice=7.4500 UnitsInStock=21 Products: ProductID=55 ProductName=Pâté chinois Category=Meat/Poultry UnitPrice=24.0000 UnitsInStock=115 Category=Dairy Products Products=... Products: ProductID=11 ProductName=Queso Cabrales Category=Dairy Products UnitPrice=21.0000 UnitsInStock=22 Products: ProductID=12 ProductName=Queso Manchego La Pastora Category=Dairy Products UnitPrice=38.0000 UnitsInStock=86 Products: ProductID=31 ProductName=Gorgonzola Telino Category=Dairy Products UnitPrice=12.5000 UnitsInStock=0 Products: ProductID=32 ProductName=Mascarpone Fabioli Category=Dairy Products UnitPrice=32.0000 UnitsInStock=9 Products: ProductID=33 ProductName=Geitost Category=Dairy Products UnitPrice=2.5000 UnitsInStock=112 Products: ProductID=59 ProductName=Raclette Courdavault Category=Dairy Products UnitPrice=55.0000 UnitsInStock=79 Products: ProductID=60 ProductName=Camembert Pierrot Category=Dairy Products UnitPrice=34.0000 UnitsInStock=19 Products: ProductID=69 ProductName=Gudbrandsdalsost Category=Dairy Products UnitPrice=36.0000 UnitsInStock=26 Products: ProductID=71 ProductName=Flotemysost Category=Dairy Products UnitPrice=21.5000 UnitsInStock=26 Products: ProductID=72 ProductName=Mozzarella di Giovanni Category=Dairy Products UnitPrice=34.8000 UnitsInStock=14


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