ReportExpression 结构

Represents a report expression.

命名空间： Microsoft.ReportingServices.RdlObjectModel
程序集： Microsoft.ReportingServices.Designer.Controls（在 Microsoft.ReportingServices.Designer.Controls.dll 中）

语法

声明
Public Structure ReportExpression _
    Implements IExpression, IXmlSerializable, IFormattable
用法
Dim instance As ReportExpression

public struct ReportExpression : IExpression, 
    IXmlSerializable, IFormattable

public value class ReportExpression : IExpression, 
    IXmlSerializable, IFormattable

[<SealedAttribute>]
type ReportExpression =  
    struct
        interface IExpression
        interface IXmlSerializable
        interface IFormattable
    end

JScript 支持使用结构，但不支持声明新结构。

ReportExpression 类型公开以下成员。

构造函数

	名称	说明
	ReportExpression(Boolean)	Initializes a new instance of the ReportExpression class.
	ReportExpression(DateTime)	Initializes a new instance of the ReportExpression class.
	ReportExpression(Int32)	Initializes a new instance of the ReportExpression class.
	ReportExpression(Single)	Initializes a new instance of the ReportExpression class.
	ReportExpression(String)	Initializes a new instance of the ReportExpression class.
	ReportExpression(String, EvaluationMode)	Initializes a new instance of the ReportExpression class.

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属性

	名称	说明
	DataType	The data type of the evaluated expression.
	Empty	An empty expression.
	EvaluationMode	The evaluation mode.
	Expression	The expression string.
	IsEmpty	Indicates whether the expression is empty.
	IsExpression	Indicates whether this is an expression.
	Value	The value of the expression.

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方法

	名称	说明
	BuildFieldReference(String)	Build a reference to a field.
	BuildFieldReference(String, String)	Build a reference to a field.
	BuildFunctionCall	Build a function call expression.
	BuildGlobalReference	Build a global reference.
	BuildParameterReference(String)	Build a parameter reference.
	BuildParameterReference(String, String)	Build a parameter reference.
	BuildUserReference	Build a reference to a user.
	Equals	Tests the equality of the current instance with another expression. （覆盖 ValueType. . :: . .Equals(Object)。）
	Finalize	（从 Object 继承。）
	GetFieldReference	Gets a field reference.
	GetHashCode	Gets a unique hash code for the current instance. （覆盖 ValueType. . :: . .GetHashCode() () () ()。）
	GetType	（从 Object 继承。）
	IsAggregateExpression	Indicates whether an expression is an aggregate.
	IsExpressionString	Indicates whether a string is an expression.
	MemberwiseClone	（从 Object 继承。）
	ToString() () () ()	Converts the current ReportExpression instance to a string. （覆盖 ValueType. . :: . .ToString() () () ()。）
	ToString(String, IFormatProvider)	Converts the current ReportExpression instance to a string.

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运算符

	名称	说明
	Equality(String, ReportExpression)	Tests the equality of two expressions.
	Equality(ReportExpression, ReportExpression)	Tests the equality of two expressions.
	Equality(ReportExpression, String)	Tests the equality of two expressions.
	Explicit Narrowing Explicit Explicit Explicit(ReportExpression to String)	Converts a ReportExpression object to an expression string.
	Implicit Widening Implicit Implicit Implicit(String to ReportExpression)	Converts an expression string to a ReportExpression object.
	Inequality(String, ReportExpression)	Tests the inequality of two expressions.
	Inequality(ReportExpression, ReportExpression)	Tests the inequality of two expressions.
	Inequality(ReportExpression, String)	Tests the inequality of two expressions.