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AggregateFunction

Class

Represents an aggregate function.

Definition

Assembly:Telerik.DataSource.dll

Syntax:

[JsonConverter(typeof(AggregateFunctionConverter))]
public abstract class AggregateFunction : JsonObject

Inheritance: objectJsonObjectAggregateFunction

Inherited Members JsonObject.ToJson()

Constructors

AggregateFunction()

protected AggregateFunction()

Methods

CreateAggregateExpression(Expression, bool)

Expression

Creates the aggregate expression that is used for constructing expression tree that will calculate the aggregate result.

public abstract Expression CreateAggregateExpression(Expression enumerableExpression, bool liftMemberAccessToNull)

Parameters:enumerableExpressionExpression

The grouping expression.

liftMemberAccessToNullboolReturns:

Expression

GenerateFunctionName()

string

Generates default name for this function using this type's name.

protected virtual string GenerateFunctionName()

Returns:

string

Function name generated with the following pattern: {GetType().Name}_{GetHashCode()}

Serialize(IDictionary<string, object>)

Serializes the provided dictionary.

protected override void Serialize(IDictionary<string, object> json)

Parameters:jsonIDictionary<string, object>

Overrides: JsonObject.Serialize(IDictionary<string, object>)

Properties

AggregateMethodName

string

public abstract string AggregateMethodName { get; }

Caption

string

Gets or sets the informative message to display as an illustration of the aggregate function.

[JsonIgnore]
public string Caption { get; set; }

Property Value:

The caption to display as an illustration of the aggregate function.

FunctionName

string

Gets or sets the name of the aggregate function, which appears as a property of the group record on which records the function works.

[JsonIgnore]
public virtual string FunctionName { get; set; }

Property Value:

The name of the function as visible from the group record.

MemberType

Type

The type of the field

[JsonIgnore]
public Type MemberType { get; set; }

ResultFormatString

string

Gets or sets a string that is used to format the result value.

[JsonIgnore]
public virtual string ResultFormatString { get; set; }

Property Value:

The format string.

SourceField

string

Gets or sets the name of the field, of the item from the set of items, which value is used as the argument of the aggregate function.

public virtual string SourceField { get; set; }

Property Value:

The name of the field to get the argument value from.