EdmFunctions.Left Method (DbExpression, DbExpression)

.NET Framework (current version)
 

Creates a DbFunctionExpression that invokes the canonical 'Left' function with the specified arguments, which must have a string and integer numeric result type. The result type of the expression is string.

Namespace:   System.Data.Common.CommandTrees.ExpressionBuilder
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

public static DbFunctionExpression Left(
	this DbExpression stringArgument,
	DbExpression length
)

Parameters

stringArgument
Type: System.Data.Common.CommandTrees.DbExpression

An expression that specifies the string from which to extract the leftmost substring.

length
Type: System.Data.Common.CommandTrees.DbExpression

An expression that specifies the length of the leftmost substring to extract from stringArgument.

Return Value

Type: System.Data.Common.CommandTrees.DbFunctionExpression

A new DbFunctionExpression that returns the the leftmost substring of length length from stringArgument.

Exception Condition
ArgumentNullException

stringArgumentlength

ArgumentException

stringArgument

.NET Framework
Available since 4.5
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