Bson |
Compile and execute string expressions using BsonDocuments. Used in all document manipulation (transform, filter, indexes, updates). See https://github.com/mbdavid/LiteDB/wiki/Expressions
Inheritance HierarchyNamespace: Internal.LiteDB
Assembly: NeoAxis.Core (in NeoAxis.Core.dll) Version: 2026.1.1.0 (2026.1.1.0)
SyntaxC#
public sealed class BsonExpression
The BsonExpression type exposes the following members.
Properties| Name | Description | |
|---|---|---|
 | Fields | Fill this hashset with all fields used in root level of document (be used to partial deserialize) - "$" means all fields |
 | Functions | Get all registered functions for BsonExpressions |
| IsImmutable | If true, this expression do not change if same document/paramter are passed (only few methods change - like NOW() - or parameters) |
| IsScalar | Indicate if this expressions returns a single value or IEnumerable value |
| Methods | Get all registered methods for BsonExpressions |
| Parameters | Get/Set parameter values that will be used on expression execution |
| Source | Get formatted expression |
| Type | Indicate expression type |
Methods| Name | Description | |
|---|---|---|
 | Create(String) | Parse string and create new instance of BsonExpression - can be cached |
| Create(String, BsonDocument) | Parse string and create new instance of BsonExpression - can be cached |
| Create(String, BsonValue) | Parse string and create new instance of BsonExpression - can be cached |
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object) |
| Execute(Collation) | Execute expression with an empty document (used only for resolve math/functions). |
| Execute(BsonDocument, Collation) | Execute expression and returns IEnumerable values |
| Execute(IEnumerableBsonDocument, Collation) | Execute expression and returns IEnumerable values |
| ExecuteScalar(Collation) | Execute scalar expression with an blank document and empty source (used only for resolve math/functions). |
| ExecuteScalar(BsonDocument, Collation) | Execute scalar expression over single document and return a single value (or BsonNull when empty). Throws exception if expression are not scalar expression |
| ExecuteScalar(IEnumerableBsonDocument, Collation) | Execute scalar expression over multiple documents and return a single value (or BsonNull when empty). Throws exception if expression are not scalar expression |
| GetHashCode | Serves as the default hash function. (Inherited from Object) |
| GetType | Gets the Type of the current instance. (Inherited from Object) |
| ToString | (Overrides ObjectToString) |
Operators| Name | Description | |
|---|---|---|
 | (BsonExpression to String) | Implicit string converter |
| (String to BsonExpression) | Implicit string converter |
Fields
Extension Methods| Name | Description | |
|---|---|---|
 | MethodInvoke |
Calls the object method by name.
(Defined by ObjectEx) |
| PropertyGet |
Gets the value of the object property by name.
(Defined by ObjectEx) |
| PropertyGetT |
Gets the value of the object property by name.
(Defined by ObjectEx) |
| PropertySet |
Sets the value of the object property by name.
(Defined by ObjectEx) |
See Also