FrameworkElement.Width FrameworkElement.Width FrameworkElement.Width FrameworkElement.Width Property

定義

取得或設定元素的寬度。Gets or sets the width of the element.

public:
 property double Width { double get(); void set(double value); };
[System.ComponentModel.TypeConverter(typeof(System.Windows.LengthConverter))]
[System.Windows.Localizability(System.Windows.LocalizationCategory.None, Readability=System.Windows.Readability.Unreadable)]
public double Width { get; set; }
member this.Width : double with get, set
Public Property Width As Double

屬性值

項目的寬度 (以 裝置獨立單位 (每單位 1/96 英吋)device-independent units (1/96th inch per unit) 為單位)。The width of the element, in 裝置獨立單位 (每單位 1/96 英吋)device-independent units (1/96th inch per unit). 預設值為 NaNThe default value is NaN. 這個值必須等於或大於 0.0。This value must be equal to or greater than 0.0. 如需上限資訊,請參閱<備註>。See Remarks for upper bound information.

備註

這是三個屬性上FrameworkElement指定寬度的資訊。This is one of three properties on FrameworkElement that specify width information. 其他兩種方式MinWidthMaxWidthThe other two are MinWidth and MaxWidth. 如果這些值之間沒有衝突,實際寬度判斷的應用程式的順序是第一個MinWidth必須能被接受,然後MaxWidth,最後每一個位於範圍中,如果WidthIf there is a conflict between these values, the order of application for actual width determination is first MinWidth must be honored, then MaxWidth, and finally if each of these are within bounds, Width.

這個屬性傳回的值一定是與任何已設定為它的值相同。The return value of this property is always the same as any value that was set to it. 相較之下,windows 7ActualWidth而有所不同。In contrast, the value of the ActualWidth may vary. 版面配置可能已基於某些原因拒絕建議的大小。The layout may have rejected the suggested size for some reason. 此外,配置系統本身以非同步方式運作的屬性系統集相對Width和可能處理該特定尚未調整大小屬性變更。Also, the layout system itself works asynchronously relative to the property system set of Width and may not have processed that particular sizing property change yet.

除了為可接受Double值,這個屬性也可以是Double.NaNIn addition to acceptable Double values, this property can also be Double.NaN. 這是您指定自動調整大小行為的方式。This is how you specify auto sizing behavior. XAMLXAML您將值設定為字串"Auto"(不區分大小寫) 若要啟用自動調整大小行為。In XAMLXAML you set the value to the string "Auto" (case insensitive) to enable the auto sizing behavior. 自動調整大小行為表示項目將會填滿可用的寬度。Auto sizing behavior implies that the element will fill the width available to it. 不過請注意,特定的控制項通常會提供將會停用自動調整大小行為,除非它是特別重新啟用其預設樣式中的預設值。Note however that specific controls frequently supply default values in their default styles that will disable the auto sizing behavior unless it is specifically re-enabled.

驗證檢查,除了沒有不具決定性的上限值,用於繫結Width,會由配置系統強制執行 (這是非常大數目,大於Single.MaxValue但小於Double.MaxValue)。In addition to the validation check, there is a nondeterministic upper value bound for Width that is enforced by the layout system (this is a very large number, larger than Single.MaxValue but smaller than Double.MaxValue). 如果您超過此限制,將不會呈現項目,並擲回任何例外狀況。If you exceed this bound, the element will not render, and no exception is thrown. 請勿設定Width大幅超過大小上限的任何可能的視覺顯示,或者您可能會超過此不具決定性的上限值。Do not set Width to a value that is significantly larger than the maximum size of any possible visual display, or you may exceed this nondeterministic upper bound.

XAML Attribute UsageXAML Attribute Usage

<object Width="double"/>  
- or -  
<object Width ="qualifiedDouble"/>  
- or -  
<object Width ="Auto"/>  

XAML 值XAML Values

doubledouble
Double

字串表示法Double等於或大於 0.0 的值。String representation of a Double value equal to or greater than 0.0. 如需上限資訊,請參閱<備註>。See Remarks for upper bound information. 這個值會解譯為裝置獨立單位 (1/96 英吋)device-independent unit (1/96th inch)度量。This value is interpreted as a 裝置獨立單位 (1/96 英吋)device-independent unit (1/96th inch) measurement. 字串不需要明確包含小數位數。Strings need not explicitly include decimal points. 執行個體的值1是可以接受的。For instance a value of 1 is acceptable.

qualifiedDoublequalifiedDouble
A值,如上所述,後面接著一個的下列單位宣告字串: pxincmptA double value as described above, followed by one of the following unit declaration strings: px, in, cm, pt.

px (預設值) 裝置獨立單位 (每單位 1/96 英吋)device-independent units (1/96th inch per unit)px (default) is 裝置獨立單位 (每單位 1/96 英吋)device-independent units (1/96th inch per unit)

in 是英吋為單位;1in = = 96pxin is inches; 1in==96px

cm 是公釐。1cm==(96/2.54) 像素cm is centimeters; 1cm==(96/2.54) px

pt is points; 1pt==(96/72) pxpt is points; 1pt==(96/72) px

Auto
啟用自動調整大小行為。Enables autosizing behavior. 請參閱<備註>。See Remarks.

相依性屬性資訊Dependency Property Information

識別項欄位Identifier field WidthProperty
若要設定的中繼資料屬性 trueMetadata properties set to true AffectsMeasure

適用於