語言

Stroke.ContainsPropertyData(Guid) 方法

定義

命名空間:
System.Windows.Ink
組件:
PresentationCore.dll

回傳一個值，指示物件是否 Stroke 包含指定的自訂屬性。

public:
 bool ContainsPropertyData(Guid propertyDataId);
public bool ContainsPropertyData(Guid propertyDataId);
member this.ContainsPropertyData : Guid -> bool
Public Function ContainsPropertyData (propertyDataId As Guid) As Boolean

參數

propertyDataId
Guid

該物業的唯一識別碼。

傳回

Boolean

若存在自訂屬性，則返回 true ;否則返回 false。

範例

以下範例示範如何判斷物件 Stroke 是否具有自訂屬性。

// Create a guid for the date/timestamp.
Guid dtGuid = new Guid("03457307-3475-3450-3035-640435034540");

DateTime now = DateTime.Now;

// Check whether the property is already saved
if (thisStroke.ContainsPropertyData(dtGuid))
{
    // Check whether the existing property matches the current date/timestamp
    DateTime oldDT = (DateTime)thisStroke.GetPropertyData(dtGuid);

    if (oldDT != now)
    {
        // Update the current date and time
        thisStroke.AddPropertyData(dtGuid, now);
    }
}

' Create a guid for the date/timestamp.
Dim dtGuid As New Guid("03457307-3475-3450-3035-640435034540")

Dim now As DateTime = DateTime.Now

' Check whether the property is already saved
If thisStroke.ContainsPropertyData(dtGuid) Then
    ' Check whether the existing property matches the current date/timestamp
    Dim oldDT As DateTime = CType(thisStroke.GetPropertyData(dtGuid), DateTime)

    If oldDT <> now Then
        ' Update the current date and time
        thisStroke.AddPropertyData(dtGuid, now)
    End If
End If

適用於

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