DataObjectItemComparer.Compare Method (String, String, Object, Object)

Artikel
10/02/2013

Compares a property of a data object with another data object property.

Namespace: Microsoft.VisualStudio.Data
Assembly: Microsoft.VisualStudio.Data (in Microsoft.VisualStudio.Data.dll)

Syntax

'Declaration
Public Overridable Function Compare ( _
    typeName As String, _
    propertyName As String, _
    value1 As Object, _
    value2 As Object _
) As Integer

public virtual int Compare(
    string typeName,
    string propertyName,
    Object value1,
    Object value2
)

public:
virtual int Compare(
    String^ typeName, 
    String^ propertyName, 
    Object^ value1, 
    Object^ value2
)

abstract Compare : 
        typeName:string * 
        propertyName:string * 
        value1:Object * 
        value2:Object -> int  
override Compare : 
        typeName:string * 
        propertyName:string * 
        value1:Object * 
        value2:Object -> int

public function Compare(
    typeName : String, 
    propertyName : String, 
    value1 : Object, 
    value2 : Object
) : int

Parameters

typeName
Type: System.String

The name of an object type.

propertyName
Type: System.String

The name of a property to compare.

value1
Type: System.Object

The first value to compare.

value2
Type: System.Object

The second value to compare.

Return Value

Type: System.Int32
Returns less than zero in cases where the identifier part is less than the specified value. Returns zero if the identifier part is equal to the specified value. Returns greater than zero if the identifier part is greater than the specified value.

Exceptions

Exception	Condition
ArgumentNullException	The typeName and/or propertyName parameter is null.

Remarks

This method should use the same comparison rules as the data source to ensure the correct sorting of objects on the client side.

The base implementation of this method uses the default .NET object comparer (Comparer) when the first value implements IComparable; otherwise it calls the IComparable implementation's override Equals method and returns 1 if this returns false.

.NET Framework Security

Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

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