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dotnet-api
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C1.CalcEngine Assembly
- C1.CalcEngine
- C1.CalcEngine.ExcelEngine
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C1.CalcEngine.ExpressionEngine
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Classes
- AggregateFunctions
- BaseFunctionExpression
- BinaryExpression
- BindingExpression
- ConvertFunctions
- CustomFunctionDefinition
- CustomFunctionExpression
- DateTimeFunctions
- Expression
- ExpressionEngine
- FunctionDefinition
- FunctionExpression
- InExpression
- LogicalFunctions
- MathFunctions
- TextFunctions
- Token
- UnaryExpression
- VariableExpression
- Structs
- Enums
- Interfaces
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Classes
- C1.CalcEngine.VBAEngine
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C1.CalcEngine Assembly
C1.CalcEngine.ExpressionEngine.ExpressionEngine
ExpressionEngine Class
The base class of expression engines is used to dynamically produce an expression and get the result of the expression.
Implements
Namespace: C1.CalcEngine.ExpressionEngine
Assembly: C1.CalcEngine.dll
Syntax
public abstract class ExpressionEngine : IExpressionEngine, IEngineExtended, IEngineExpressionItems, ISupportAliases, ISupportCustomFunctionsConstructors
| Name | Description |
|---|---|
| ExpressionEngine() | Initializes a new instance of the ExpressionEngine class. |
Properties
| Name | Description |
|---|---|
| CultureInfo | Gets or sets the CultureInfo to use when parsing numbers and dates. |
| CurrentIndex | Gets or sets the index of the entry from data source. |
| CurrentPosition | Current pointer into expression. |
| DataSource | Gets or sets the object used as the data source. |
| DecimalSeparator | Gets a localized decimal separator. |
| Expression | Gets or sets the expression string. |
| IsValid | Gets a value that indicates whether the expression is valid. |
| ListSeparator | Gets a localized list separator. |
| OptimizedExpression | Expression being parsed. |
| Syntax | Gets an object containing the syntax of the expression engine. |
Methods
| Name | Description |
|---|---|
| AddAlias(string, string) | Adds an alias for a field from DataSource. |
| AddError(int, int, ErrorType) | Adds an error to the error collection. |
| AddFunction(List<ExpressionItem>, Func<List<object>, object>, int, int) | Adds a custom function. |
| ClearCachedExpression() | Clears the cached expression. |
| Evaluate() | Gets a result of expression. |
| GetBinaryExpression(Token, IExpression, IExpression) | Gets a binary expression. |
| GetBindingExpression(IEnumerable<PropertyInfo>, IEnumerable<string>) | Gets a binding expression. |
| GetCustomFunctionExpression(string, CustomFunctionDefinition, List<IExpression>) | Gets a custom function expression. |
| GetErrors() | Gets a enumerator of ErrorInfo objects. |
| GetExpressionItems() | Gets a enumerator of ExpressionItem of the current context. |
| GetFieldNames() | Gets the data source field names. |
| GetFunctionExpression(string, FunctionDefinition, List<IExpression>) | Gets a function expression. |
| GetInExpression(List<IExpression>, IExpression) | Gets a IN expression. |
| GetIndex() | Gets the index of the collection object. |
| GetItemsCount(IExpression) | Gets a count of data source items. |
| GetObjectName() | Gets the name of the data field for the current token. |
| GetUnaryExpression(Token, IExpression) | Gets a unary expression. |
| GetValue(IEnumerable<object>) | Gets a value from data source. |
| GetVariableExpression(IDictionary<string, object>, string) | Gets a variable expression. |
| IsDot() | Checks the current token for the DOT type. |
| IsExpressionEnd(char) | Checks whether the character is the end of the expression. |
| IsLetter(char) | Checks if a character is a letter. |
| Parse() | Parses an Expression string. |
| ParseIdentifier(char, int) | Parses an identifier string. |
| ParseIdentifier(string) | Parses an identifier string. |
| ParsePostfix(string, int) | Parses postfix of expression. |
| ParsePrefix(string, int) | Parses prefix of expression. |
| TryAddAlias(string, string) | Tries to add an alias for a field from DataSource. |
| TryEvaluate(out object) | Gets a result of expression. A return value indicates whether the evaluate succeeded or failed. |