ProgressBarRenderer.IsSupported 屬性

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

取得值，指出 ProgressBarRenderer 類別是否可用來繪製具有視覺化樣式的進度列控制項。

public:
 static property bool IsSupported { bool get(); };

public static bool IsSupported { get; }

member this.IsSupported : bool

Public Shared ReadOnly Property IsSupported As Boolean

屬性值

Boolean

如果使用者在作業系統中已經啟用視覺化樣式，而且應用程式視窗的工作區中已經套用視覺化樣式，則為 true，否則為 false。

範例

下列程式碼範例會使用 IsSupported 屬性來判斷是否要呼叫 DrawVerticalBar 方法。 此程式碼範例是針對 類別提供的較大範例的 ProgressBarRenderer 一部分。

    // Draw the progress bar in its normal state.
protected:
    virtual void OnPaint(PaintEventArgs^ e) override
    {
        __super::OnPaint(e);

        if (ProgressBarRenderer::IsSupported)
        {
            ProgressBarRenderer::DrawVerticalBar(e->Graphics, 
                ClientRectangle);
            this->Parent->Text = "VerticalProgressBar Enabled";
        }
        else
        {
            this->Parent->Text = "VerticalProgressBar Disabled";
        }
    }

// Draw the progress bar in its normal state.
protected override void OnPaint(PaintEventArgs e)
{
    base.OnPaint(e);

    if (ProgressBarRenderer.IsSupported)
    {
        ProgressBarRenderer.DrawVerticalBar(e.Graphics,
            ClientRectangle);
        this.Parent.Text = "VerticalProgressBar Enabled";
    }
    else
    {
        this.Parent.Text = "VerticalProgressBar Disabled";
    }
}

' Draw the progress bar in its normal state.
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) 
    MyBase.OnPaint(e)
    
    If ProgressBarRenderer.IsSupported Then
        ProgressBarRenderer.DrawVerticalBar(e.Graphics, ClientRectangle)
        Me.Parent.Text = "VerticalProgressBar Enabled"
    Else
        Me.Parent.Text = "VerticalProgressBar Disabled"
    End If

End Sub

備註

如果這個屬性是 false ，這個類別的方法和屬性將會擲回 InvalidOperationException 。

另請參閱

• VisualStyleState