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ToolboxBitmapAttribute-Klasse

  • Artikel

Ermöglicht Ihnen, ein Symbol anzugeben, das ein Steuerelement in einem Container darstellt, z. B. in Microsoft Visual Studio Form Designer.

Namespace: System.Drawing
Assembly: System.Drawing (in system.drawing.dll)

Syntax

'Declaration
<AttributeUsageAttribute(AttributeTargets.Class)> _
Public Class ToolboxBitmapAttribute
    Inherits Attribute
'Usage
Dim instance As ToolboxBitmapAttribute

[AttributeUsageAttribute(AttributeTargets.Class)] 
public class ToolboxBitmapAttribute : Attribute

[AttributeUsageAttribute(AttributeTargets::Class)] 
public ref class ToolboxBitmapAttribute : public Attribute

/** @attribute AttributeUsageAttribute(AttributeTargets.Class) */ 
public class ToolboxBitmapAttribute extends Attribute

AttributeUsageAttribute(AttributeTargets.Class) 
public class ToolboxBitmapAttribute extends Attribute

Hinweise

Sie können einem Steuerelement ein ToolboxBitmapAttribute zuweisen, sodass Container, z. B. Microsoft Visual Studio Form Designer, ein Symbol für das Steuerelement abrufen können. Die Bitmap für das Symbol kann in einer eigenen Datei abgelegt oder in der Assembly mit dem Steuerelement eingebettet sein. Die Größe der in der Steuerelementassembly eingebetteten bzw. in einer eigenen Datei gespeicherten Bitmap muss 16 x 16 betragen. Die GetImage-Methode eines ToolboxBitmapAttribute-Objekts kann ein kleines 16 x 16-Bild zurückgeben oder ein großes 32 x 32-Bild, das durch Skalieren des kleinen Bildes erstellt wird.

Beispiel

Im folgenden Codebeispiel wird veranschaulicht, wie Sie mithilfe der ToolboxBitmapAttribute-Klasse stop.bmp als Toolboxsymbol für StopSignControl festlegen. In diesem Beispiel wird davon ausgegangen, dass eine 16 x 16-Pixel-Bitmap mit dem Namen stop.bmp in c:\ vorhanden ist.

<System.Drawing.ToolboxBitmap("c:\stop.bmp")> _
Public Class StopSignControl
    Inherits System.Windows.Forms.UserControl

    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Button1 As System.Windows.Forms.Button

    Public Sub New()
        MyBase.New()
        Me.Label1 = New System.Windows.Forms.Label
        Me.Button1 = New System.Windows.Forms.Button

        Me.Label1.Font = New System.Drawing.Font("Microsoft Sans Serif", _
            12.0F, System.Drawing.FontStyle.Regular, _
            System.Drawing.GraphicsUnit.Point, CType(0, Byte))

        Me.Label1.ForeColor = System.Drawing.Color.Red
        Me.Label1.Location = New System.Drawing.Point(24, 56)
        Me.Label1.Name = "Label1"
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "Stop!"
        Me.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter

        Me.Button1.Enabled = False
        Me.Button1.Location = New System.Drawing.Point(56, 88)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(40, 32)
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "stop"

        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.Label1)
        Me.Name = "StopSignControl"

    End Sub

    Private Sub StopSignControl_MouseEnter(ByVal sender As Object, _
        ByVal e As System.EventArgs) Handles MyBase.MouseEnter

        Label1.Text.ToUpper()
        Label1.Font = New System.Drawing.Font(Label1.Font.FontFamily, _
            14.0F, System.Drawing.FontStyle.Bold)
        Button1.Enabled = True
    End Sub

    Private Sub StopSignControl_MouseLeave(ByVal sender As Object, _
        ByVal e As System.EventArgs) Handles MyBase.MouseLeave

        Label1.Text.ToLower()
        Label1.Font = New System.Drawing.Font(Label1.Font.FontFamily, 12.0F, _
             System.Drawing.FontStyle.Regular)
        Button1.Enabled = False
    End Sub

End Class

[System.Drawing.ToolboxBitmap("c:\\stop.bmp")]
public class StopSignControl:
    System.Windows.Forms.UserControl

{
    internal System.Windows.Forms.Label Label1;
    internal System.Windows.Forms.Button Button1;

    public StopSignControl() : base()
    {        
        this.Label1 = new System.Windows.Forms.Label();
        this.Button1 = new System.Windows.Forms.Button();

        this.Label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 12.0F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte) 0));

        this.Label1.ForeColor = System.Drawing.Color.Red;
        this.Label1.Location = new System.Drawing.Point(24, 56);
        this.Label1.Name = "Label1";
        this.Label1.TabIndex = 0;
        this.Label1.Text = "Stop!";
        this.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;

        this.Button1.Enabled = false;
        this.Button1.Location = new System.Drawing.Point(56, 88);
        this.Button1.Name = "Button1";
        this.Button1.Size = new System.Drawing.Size(40, 32);
        this.Button1.TabIndex = 1;
        this.Button1.Text = "stop";

        this.Controls.Add(this.Button1);
        this.Controls.Add(this.Label1);
        this.Name = "StopSignControl";

    }

    private void StopSignControl_MouseEnter(object sender, System.EventArgs e)
    {

        Label1.Text.ToUpper();
        Label1.Font = new System.Drawing.Font(Label1.Font.FontFamily, 14.0F, 
        System.Drawing.FontStyle.Bold);
        Button1.Enabled = true;
    }

    private void StopSignControl_MouseLeave(object sender, System.EventArgs e)
    {

        Label1.Text.ToLower();
        Label1.Font = new System.Drawing.Font(Label1.Font.FontFamily, 12.0F, 
        System.Drawing.FontStyle.Regular);
        Button1.Enabled = false;
    }

}

[ToolboxBitmap("c:\\stop.bmp")]
public ref class StopSignControl:
    public System::Windows::Forms::UserControl
{
private:
    Label^ label1;
private:
    Button^ button1;

public:
    StopSignControl() : UserControl()
    {
        this->label1 = gcnew System::Windows::Forms::Label();
        this->button1 = gcnew System::Windows::Forms::Button();

        this->label1->Font = gcnew System::Drawing::Font(
            "Microsoft Sans Serif", 12.0F,
            System::Drawing::FontStyle::Regular,
            System::Drawing::GraphicsUnit::Point, ((Byte) 0));

        this->label1->ForeColor = System::Drawing::Color::Red;
        this->label1->Location = System::Drawing::Point(24, 56);
        this->label1->Name = "Label1";
        this->label1->TabIndex = 0;
        this->label1->Text = "Stop!";
        this->label1->TextAlign =
            System::Drawing::ContentAlignment::MiddleCenter;

        this->button1->Enabled = false;
        this->button1->Location = System::Drawing::Point(56, 88);
        this->button1->Name = "Button1";
        this->button1->Size = System::Drawing::Size(40, 32);
        this->button1->TabIndex = 1;
        this->button1->Text = "stop";

        this->Controls->Add(this->button1);
        this->Controls->Add(this->label1);
        this->Name = "StopSignControl";

        this->MouseEnter +=
            gcnew EventHandler(this, 
                &StopSignControl::StopSignControl_MouseEnter);
        this->MouseLeave +=
            gcnew EventHandler(this, 
                &StopSignControl::StopSignControl_MouseLeave);

    }

private:
    void StopSignControl_MouseEnter(Object^ sender,
        EventArgs^ e)
    {

        label1->Text = label1->Text->ToUpper();
        label1->Font = gcnew System::Drawing::Font(label1->Font->FontFamily,
            14.0F, FontStyle::Bold);
        button1->Enabled = true;
    }

private:
    void StopSignControl_MouseLeave(Object^ sender,
        EventArgs^ e)
    {

        label1->Text = label1->Text->ToLower();
        label1->Font = gcnew System::Drawing::Font(label1->Font->FontFamily,
            12.0F, FontStyle::Regular);
        button1->Enabled = false;
    }

};

/** @attribute System.Drawing.ToolboxBitmap("c:\\stop.bmp")
 */
public class StopSignControl extends System.Windows.Forms.UserControl
{
    System.Windows.Forms.Label label1;
    System.Windows.Forms.Button button1;

    public StopSignControl()
    {
        this.label1 = new System.Windows.Forms.Label();
        this.button1 = new System.Windows.Forms.Button();

        this.label1.set_Font(new System.Drawing.Font("Microsoft Sans Serif", 
            12, System.Drawing.FontStyle.Regular, 
            System.Drawing.GraphicsUnit.Point, (ubyte)0));

        this.label1.set_ForeColor(System.Drawing.Color.get_Red());
        this.label1.set_Location(new System.Drawing.Point(24, 56));
        this.label1.set_Name("label1");
        this.label1.set_TabIndex(0);
        this.label1.set_Text("Stop!");
        this.label1.set_TextAlign(System.Drawing.ContentAlignment.MiddleCenter);

        this.button1.set_Enabled(false);
        this.button1.set_Location(new System.Drawing.Point(56, 88));
        this.button1.set_Name("button1");
        this.button1.set_Size(new System.Drawing.Size(40, 32));
        this.button1.set_TabIndex(1);
        this.button1.set_Text("stop");

        this.get_Controls().Add(this.button1);
        this.get_Controls().Add(this.label1);
        this.set_Name("StopSignControl");
    } //StopSignControl

    private void StopSignControl_MouseEnter(Object sender, System.EventArgs e)
    {
        label1.set_Text(label1.get_Text().ToUpper());
        label1.set_Font(new Font(label1.get_Font().get_FontFamily(), 14, 
            FontStyle.Bold));
        button1.set_Enabled(true);
    } //StopSignControl_MouseEnter

    private void StopSignControl_MouseLeave(Object sender, System.EventArgs e)
    {
        label1.set_Text(label1.get_Text().ToLower());
        label1.set_Font(new Font(label1.get_Font().get_FontFamily(), 12, 
            System.Drawing.FontStyle.Regular));
        button1.set_Enabled(false);
    } //StopSignControl_MouseLeave
} //StopSignControl

Vererbungshierarchie

System.Object
   System.Attribute
    System.Drawing.ToolboxBitmapAttribute

Threadsicherheit

Alle öffentlichen statischen (Shared in Visual Basic) Member dieses Typs sind threadsicher. Bei Instanzmembern ist die Threadsicherheit nicht gewährleistet.

Plattformen

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

ToolboxBitmapAttribute-Member
System.Drawing-Namespace