Expression.GreaterThan Method
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Creates a BinaryExpression that represents a "greater than" numeric comparison.
GreaterThan(Expression, Expression) |
Creates a BinaryExpression that represents a "greater than" numeric comparison. |
GreaterThan(Expression, Expression, Boolean, MethodInfo) |
Creates a BinaryExpression that represents a "greater than" numeric comparison. The implementing method can be specified. |
- Source:
- BinaryExpression.cs
- Source:
- BinaryExpression.cs
- Source:
- BinaryExpression.cs
Creates a BinaryExpression that represents a "greater than" numeric comparison.
public:
static System::Linq::Expressions::BinaryExpression ^ GreaterThan(System::Linq::Expressions::Expression ^ left, System::Linq::Expressions::Expression ^ right);
public static System.Linq.Expressions.BinaryExpression GreaterThan (System.Linq.Expressions.Expression left, System.Linq.Expressions.Expression right);
static member GreaterThan : System.Linq.Expressions.Expression * System.Linq.Expressions.Expression -> System.Linq.Expressions.BinaryExpression
Public Shared Function GreaterThan (left As Expression, right As Expression) As BinaryExpression
Parameters
- left
- Expression
An Expression to set the Left property equal to.
- right
- Expression
An Expression to set the Right property equal to.
Returns
A BinaryExpression that has the NodeType property equal to GreaterThan and the Left and Right properties set to the specified values.
Exceptions
left
or right
is null
.
The "greater than" operator is not defined for left
.Type and right
.Type.
Examples
The following code example shows how to create an expression that compares two integers.
// Add the following directive to your file:
// using System.Linq.Expressions;
// This expression compares the values of its two arguments.
// Both arguments must be of the same type.
Expression greaterThanExpr = Expression.GreaterThan(
Expression.Constant(42),
Expression.Constant(45)
);
// Print out the expression.
Console.WriteLine(greaterThanExpr.ToString());
// The following statement first creates an expression tree,
// then compiles it, and then executes it.
Console.WriteLine(
Expression.Lambda<Func<bool>>(greaterThanExpr).Compile()());
// This code example produces the following output:
//
// (42 > 45)
// False
' Add the following directive to your file:
' Imports System.Linq.Expressions
' This expression compares the values of its two arguments.
' Both arguments must be of the same type.
Dim greaterThanExpr As Expression = Expression.GreaterThan(
Expression.Constant(42),
Expression.Constant(45)
)
' Print the expression.
Console.WriteLine(greaterThanExpr.ToString())
' The following statement first creates an expression tree,
' then compiles it, and then executes it.
Console.WriteLine(
Expression.Lambda(Of Func(Of Boolean))(greaterThanExpr).Compile()())
' This code example produces the following output:
'
' (42 > 45)
' False
Remarks
The resulting BinaryExpression has the Method property set to the implementing method. The Type property is set to the type of the node. If the node is lifted, the IsLifted property is true
. Otherwise, it is false
. The IsLiftedToNull property is always false
. The Conversion property is null
.
The following information describes the implementing method, the node type, and whether a node is lifted.
Implementing Method
The following rules determine the implementing method for the operation:
If the Type property of either
left
orright
represents a user-defined type that overloads the "greater than" operator, the MethodInfo that represents that method is the implementing method.Otherwise, if
left
.Type andright
.Type are numeric types, the implementing method isnull
.
Node Type and Lifted versus Non-Lifted
If the implementing method is not null
:
If
left
.Type andright
.Type are assignable to the corresponding argument types of the implementing method, the node is not lifted. The type of the node is the return type of the implementing method.If the following two conditions are satisfied, the node is lifted and the type of the node is Boolean:
left
.Type andright
.Type are both value types of which at least one is nullable and the corresponding non-nullable types are equal to the corresponding argument types of the implementing method.The return type of the implementing method is Boolean.
If the implementing method is null
:
If
left
.Type andright
.Type are both non-nullable, the node is not lifted. The type of the node is Boolean.If
left
.Type andright
.Type are both nullable, the node is lifted. The type of the node is Boolean.
Applies to
.NET 9 and other versions
Product | Versions |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1 |
UWP | 10.0 |
- Source:
- BinaryExpression.cs
- Source:
- BinaryExpression.cs
- Source:
- BinaryExpression.cs
Creates a BinaryExpression that represents a "greater than" numeric comparison. The implementing method can be specified.
public:
static System::Linq::Expressions::BinaryExpression ^ GreaterThan(System::Linq::Expressions::Expression ^ left, System::Linq::Expressions::Expression ^ right, bool liftToNull, System::Reflection::MethodInfo ^ method);
public static System.Linq.Expressions.BinaryExpression GreaterThan (System.Linq.Expressions.Expression left, System.Linq.Expressions.Expression right, bool liftToNull, System.Reflection.MethodInfo method);
public static System.Linq.Expressions.BinaryExpression GreaterThan (System.Linq.Expressions.Expression left, System.Linq.Expressions.Expression right, bool liftToNull, System.Reflection.MethodInfo? method);
static member GreaterThan : System.Linq.Expressions.Expression * System.Linq.Expressions.Expression * bool * System.Reflection.MethodInfo -> System.Linq.Expressions.BinaryExpression
Public Shared Function GreaterThan (left As Expression, right As Expression, liftToNull As Boolean, method As MethodInfo) As BinaryExpression
Parameters
- left
- Expression
An Expression to set the Left property equal to.
- right
- Expression
An Expression to set the Right property equal to.
- liftToNull
- Boolean
true
to set IsLiftedToNull to true
; false
to set IsLiftedToNull to false
.
- method
- MethodInfo
A MethodInfo to set the Method property equal to.
Returns
A BinaryExpression that has the NodeType property equal to GreaterThan and the Left, Right, IsLiftedToNull, and Method properties set to the specified values.
Exceptions
left
or right
is null
.
method
is not null
and the method it represents returns void
, is not static
(Shared
in Visual Basic), or does not take exactly two arguments.
method
is null
and the "greater than" operator is not defined for left
.Type and right
.Type.
Remarks
The resulting BinaryExpression has the Method property set to the implementing method. The Type property is set to the type of the node. If the node is lifted, the IsLifted property is true
and the IsLiftedToNull property is equal to liftToNull
. Otherwise, they are both false
. The Conversion property is null
.
The following information describes the implementing method, the node type, and whether a node is lifted.
Implementing Method
The following rules determine the implementing method for the operation :
If
method
is notnull
and it represents a non-void,static
(Shared
in Visual Basic) method that takes two arguments, it is the implementing method.Otherwise, if the Type property of either
left
orright
represents a user-defined type that overloads the "greater than" operator, the MethodInfo that represents that method is the implementing method.Otherwise, if
left
.Type andright
.Type are numeric types, the implementing method isnull
.
Node Type and Lifted versus Non-Lifted
If the implementing method is not null
:
If
left
.Type andright
.Type are assignable to the corresponding argument types of the implementing method, the node is not lifted. The type of the node is the return type of the implementing method.If the following two conditions are satisfied, the node is lifted; also, the type of the node is nullable Boolean if
liftToNull
istrue
or Boolean ifliftToNull
isfalse
:left
.Type andright
.Type are both value types of which at least one is nullable and the corresponding non-nullable types are equal to the corresponding argument types of the implementing method.The return type of the implementing method is Boolean.
If the implementing method is null
:
If
left
.Type andright
.Type are both non-nullable, the node is not lifted. The type of the node is Boolean.If
left
.Type andright
.Type are both nullable, the node is lifted. The type of the node is nullable Boolean ifliftToNull
istrue
or Boolean ifliftToNull
isfalse
.
Applies to
.NET 9 and other versions
Product | Versions |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1 |
UWP | 10.0 |
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