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Left

Class

Implements the LEFT function, which extracts a specified number of characters from the beginning of a text string.

Definition

Namespace:Telerik.Documents.Spreadsheet.Expressions.Functions

Assembly:Telerik.Windows.Documents.Spreadsheet.dll

Syntax:

public class Left : FunctionWithArguments

Inheritance: objectFunctionBaseFunctionWithArgumentsLeft

Inherited Members FunctionWithArguments.EvaluateOverride(FunctionEvaluationContext<RadExpression>)FunctionWithArguments.EvaluateLiftedElement(FunctionEvaluationContext<RadExpression>, RadExpression[], int, int)FunctionBase.IsSpillingArgument(int, RadExpression)FunctionBase.Evaluate(FunctionEvaluationContext<RadExpression>)FunctionBase.IsArgumentNumberValid(int)FunctionBase.ArgumentConversionRules...

Constructors

Left()

Initializes a new LEFT function instance that extracts characters from the start of text.

public Left()

Fields

FunctionName

string

The name of the function.

public static readonly string FunctionName

Properties

FunctionInfo

Gets the function info.

public override FunctionInfo FunctionInfo { get; }

Property Value:

The function info as FunctionInfo.

Overrides: FunctionBase.FunctionInfo

When true, FunctionBase automatically evaluates this function element-wise over any multi-element array argument and returns a spilled array result. Override to true in pure scalar functions (e.g. ABS, LEN, MOD) where applying the function independently to each element of an input array is the correct dynamic-array behavior. Leave false (the default) for reducers.

public override bool LiftsOverArrays { get; }

Overrides: FunctionBase.LiftsOverArrays

Name

string

Gets the name of the function.

public override string Name { get; }

Property Value:

The name as String.

Overrides: FunctionBase.Name

Methods

EvaluateOverride(FunctionEvaluationContext<object>)

Virtual method evaluating the function with System.Object arguments array.

protected override RadExpression EvaluateOverride(FunctionEvaluationContext<object> context)

Parameters:contextFunctionEvaluationContext<object>Returns:

RadExpression

Functions result as RadExpression.

Overrides: FunctionWithArguments.EvaluateOverride(FunctionEvaluationContext<object>)