Class PredicateBuilder
See http://www.albahari.com/expressions for information and examples.
Inheritance
System.Object
PredicateBuilder
Namespace: System.Linq
Assembly: Volo.Abp.Core.dll
Syntax
public static class PredicateBuilder : objectMethods
And<T>(Expression<Func<T, Boolean>>, Expression<Func<T, Boolean>>)
AND
Declaration
public static Expression<Func<T, bool>> And<T>(this Expression<Func<T, bool>> expr1, Expression<Func<T, bool>> expr2)Parameters
| Type | Name | Description |
|---|---|---|
| Expression<Func<T, System.Boolean>> | expr1 | |
| Expression<Func<T, System.Boolean>> | expr2 |
Returns
| Type | Description |
|---|---|
| Expression<Func<T, System.Boolean>> |
Type Parameters
| Name | Description |
|---|---|
| T |
Extend<T>(Expression<Func<T, Boolean>>, Expression<Func<T, Boolean>>, PredicateOperator)
Extends the specified source Predicate with another Predicate and the specified PredicateOperator.
Declaration
public static Expression<Func<T, bool>> Extend<T>(this Expression<Func<T, bool>> first, Expression<Func<T, bool>> second, PredicateOperator operator = PredicateOperator.Or)Parameters
| Type | Name | Description |
|---|---|---|
| Expression<Func<T, System.Boolean>> | first | The source Predicate. |
| Expression<Func<T, System.Boolean>> | second | The second Predicate. |
| PredicateOperator | operator | The Operator (can be "And" or "Or"). |
Returns
| Type | Description |
|---|---|
| Expression<Func<T, System.Boolean>> | Expression{Func{T, bool}} |
Type Parameters
| Name | Description |
|---|---|
| T | The type |
Extend<T>(ExpressionStarter<T>, Expression<Func<T, Boolean>>, PredicateOperator)
Extends the specified source Predicate with another Predicate and the specified PredicateOperator.
Declaration
public static Expression<Func<T, bool>> Extend<T>(this ExpressionStarter<T> first, Expression<Func<T, bool>> second, PredicateOperator operator = PredicateOperator.Or)Parameters
| Type | Name | Description |
|---|---|---|
| ExpressionStarter<T> | first | The source Predicate. |
| Expression<Func<T, System.Boolean>> | second | The second Predicate. |
| PredicateOperator | operator | The Operator (can be "And" or "Or"). |
Returns
| Type | Description |
|---|---|
| Expression<Func<T, System.Boolean>> | Expression{Func{T, bool}} |
Type Parameters
| Name | Description |
|---|---|
| T | The type |
New<T>(Expression<Func<T, Boolean>>)
Start an expression
Declaration
public static ExpressionStarter<T> New<T>(Expression<Func<T, bool>> expr = null)Parameters
| Type | Name | Description |
|---|---|---|
| Expression<Func<T, System.Boolean>> | expr |
Returns
| Type | Description |
|---|---|
| ExpressionStarter<T> |
Type Parameters
| Name | Description |
|---|---|
| T |
New<T>(Boolean)
Create an expression with a stub expression true or false to use when the expression is not yet started.
Declaration
public static ExpressionStarter<T> New<T>(bool defaultExpression)Parameters
| Type | Name | Description |
|---|---|---|
| System.Boolean | defaultExpression |
Returns
| Type | Description |
|---|---|
| ExpressionStarter<T> |
Type Parameters
| Name | Description |
|---|---|
| T |
Or<T>(Expression<Func<T, Boolean>>, Expression<Func<T, Boolean>>)
OR
Declaration
public static Expression<Func<T, bool>> Or<T>(this Expression<Func<T, bool>> expr1, Expression<Func<T, bool>> expr2)Parameters
| Type | Name | Description |
|---|---|---|
| Expression<Func<T, System.Boolean>> | expr1 | |
| Expression<Func<T, System.Boolean>> | expr2 |
Returns
| Type | Description |
|---|---|
| Expression<Func<T, System.Boolean>> |
Type Parameters
| Name | Description |
|---|---|
| T |