C# Eval Expression LINQ Dynamic - Min

LINQ Dynamic Min Examples

C# Dynamic LINQ Min examples using an Expression Evaluator.

• Min - Simple
• Min - Projection
• Min - Grouped
• Min - Elements

Min - Simple

This C# example uses the LINQ Min method with a dynamic expression to get the lowest number in an array.

LINQ

private void uiMin_Simple_LINQ_Click(object sender, EventArgs e)
{
	int[] numbers = {5, 4, 1, 3, 9, 8, 6, 7, 2, 0};

	var minNum = numbers.Min();

	var sb = new StringBuilder();

	sb.AppendLine("The minimum number is {0}.", minNum);

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

LINQ Execute

private void uiMin_Simple_LINQ_Execute_Click(object sender, EventArgs e)
{
	int[] numbers = {5, 4, 1, 3, 9, 8, 6, 7, 2, 0};

	var minNum = numbers.Execute<int>("Min()");

	var sb = new StringBuilder();

	sb.AppendLine("The minimum number is {0}.", minNum);

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

Result

highlight text %} LINQ Execute Test

The minimum number is 0.

## Min - Projection
This C# example uses the LINQ Min method with a dynamic expression to get the length of the shortest word in an array.

### LINQ
```csharp
private void uiMin_Projection_LINQ_Click(object sender, EventArgs e)
{
	string[] words = {"cherry", "apple", "blueberry"};

	var shortestWord = words.Min(w => w.Length);

	var sb = new StringBuilder();

	sb.AppendLine("The shortest word is {0} characters long.", shortestWord);

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

LINQ Execute

private void uiMin_Projection_LINQ_Execute_Click(object sender, EventArgs e)
{
	string[] words = {"cherry", "apple", "blueberry"};

	var shortestWord = words.Execute<int>("Min(w => w.Length)");

	var sb = new StringBuilder();

	sb.AppendLine("The shortest word is {0} characters long.", shortestWord);

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

Result

highlight text %} LINQ Execute Test

The shortest word is 5 characters long.

## Min - Grouped
This C# example uses the LINQ Min method with a dynamic expression to get the cheapest price among each category's products.

### LINQ
```csharp
private void uiMin_Grouped_LINQ_Click(object sender, EventArgs e)
{
	var products = My.GetProductList();

	var categories = products.GroupBy(p => p.Category).Select(g => new {Category = g.Key, CheapestPrice = g.Min(p => p.UnitPrice)});

	var sb = new StringBuilder();

	My.ObjectDumper.Write(sb, categories);

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

LINQ Execute

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

	var categories = products.Execute("GroupBy(p => p.Category).Select(g => new { Category = g.Key, CheapestPrice = g.Min(p => p.UnitPrice) })");

	var sb = new StringBuilder();

	My.ObjectDumper.Write(sb, categories);

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

Result

highlight text %} LINQ Execute Test

Category=Beverages Category=Condiments Category=Produce Category=Meat/Poultry Category=Seafood Category=Dairy Products Category=Confections Category=Grains/Cereals CheapestPrice=4.5000 CheapestPrice=10.0000 CheapestPrice=10.0000 CheapestPrice=7.4500 CheapestPrice=6.0000 CheapestPrice=2.5000 CheapestPrice=9.2000 CheapestPrice=7.0000

## Min - Elements
This C# example uses the LINQ Min method with a dynamic expression to get the products with the cheapest price in each category.

### LINQ
```csharp
private void uiMin_Elements_LINQ_Click(object sender, EventArgs e)
{
	var products = My.GetProductList();

	var categories = products.GroupBy(p => p.Category).Select(g => new {Category = g.Key, CheapestProducts = g.Where(p => p.UnitPrice == g.Min(p2 => p2.UnitPrice))});

	var sb = new StringBuilder();

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

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

LINQ Execute

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

	var categories = products.Execute("GroupBy(p => p.Category).Select(g => new { Category = g.Key, CheapestProducts = g.Where(p => p.UnitPrice == g.Min(p2 => p2.UnitPrice)) })");

	var sb = new StringBuilder();

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

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

Result

highlight text %} LINQ Execute Test

Category=Beverages CheapestProducts=... CheapestProducts: ProductID=24 ProductName=Guaraná Fantástica Category=Beverages UnitPrice=4.5000 UnitsInStock=20 Category=Condiments CheapestProducts=... CheapestProducts: ProductID=3 ProductName=Aniseed Syrup Category=Condiments UnitPrice=10.0000 UnitsInStock=13 Category=Produce CheapestProducts=... CheapestProducts: ProductID=74 ProductName=Longlife Tofu Category=Produce UnitPrice=10.0000 UnitsInStock=4 Category=Meat/Poultry CheapestProducts=... CheapestProducts: ProductID=54 ProductName=Tourtière Category=Meat/Poultry UnitPrice=7.4500 UnitsInStock=21 Category=Seafood CheapestProducts=... CheapestProducts: ProductID=13 ProductName=Konbu Category=Seafood UnitPrice=6.0000 UnitsInStock=24 Category=Dairy Products CheapestProducts=... CheapestProducts: ProductID=33 ProductName=Geitost Category=Dairy Products UnitPrice=2.5000 UnitsInStock=112 Category=Confections CheapestProducts=... CheapestProducts: ProductID=19 ProductName=Teatime Chocolate Biscuits Category=Confections UnitPrice=9.2000 UnitsInStock=25 Category=Grains/Cereals CheapestProducts=... CheapestProducts: ProductID=52 ProductName=Filo Mix Category=Grains/Cereals UnitPrice=7.0000 UnitsInStock=38