Control.Name-Eigenschaft
Ruft den Namen des Steuerelements ab oder legt diesen fest.
Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)
Assembly: System.Windows.Forms (in system.windows.forms.dll)
Mithilfe der Name-Eigenschaft kann das Objekt zur Laufzeit nach Namen statt nach Typ und vom Programm festgelegtem Namen ausgewertet werden. Da die Name-Eigenschaft einen String-Typ zurückgibt, kann sie in logischen Case-Anweisungen ausgewertet werden (Select-Anweisung in Visual Basic, switch-Anweisung in Visual C# und Visual C++).
Im folgenden Codebeispiel wird der Name eines Steuerelements in einer MessageBox angezeigt, wenn das Steuerelement einem Formular hinzugefügt oder aus einem Formular entfernt wird.
// This example demonstrates the use of the ControlAdded and // ControlRemoved events. This example assumes that two Button controls // are added to the form and connected to the addControl_Click and // removeControl_Click event-handler methods. private void Form1_Load(object sender, System.EventArgs e) { // Connect the ControlRemoved and ControlAdded event handlers // to the event-handler methods. // ControlRemoved and ControlAdded are not available at design time. this.ControlRemoved += new System.Windows.Forms.ControlEventHandler(this.Control_Removed); this.ControlAdded += new System.Windows.Forms.ControlEventHandler(this.Control_Added); } private void Control_Added(object sender, System.Windows.Forms.ControlEventArgs e) { MessageBox.Show("The control named " + e.Control.Name + " has been added to the form."); } private void Control_Removed(object sender, System.Windows.Forms.ControlEventArgs e) { MessageBox.Show("The control named " + e.Control.Name + " has been removed from the form."); } // Click event handler for a Button control. Adds a TextBox to the form. private void addControl_Click(object sender, System.EventArgs e) { // Create a new TextBox control and add it to the form. TextBox textBox1 = new TextBox(); textBox1.Size = new Size(100,10); textBox1.Location = new Point(10,10); // Name the control in order to remove it later. The name must be specified // if a control is added at run time. textBox1.Name = "textBox1"; // Add the control to the form's control collection. this.Controls.Add(textBox1); } // Click event handler for a Button control. // Removes the previously added TextBox from the form. private void removeControl_Click(object sender, System.EventArgs e) { // Loop through all controls in the form's control collection. foreach (Control tempCtrl in this.Controls) { // Determine whether the control is textBox1, // and if it is, remove it. if (tempCtrl.Name == "textBox1") { this.Controls.Remove(tempCtrl); } } }
// This example demonstrates the use of the ControlAdded and
// ControlRemoved events. This example assumes that two Button controls
// are added to the form and connected to the addControl_Click and
// removeControl_Click event-handler methods.
private void Form1_Load(Object sender, System.EventArgs e)
{
// Connect the ControlRemoved and ControlAdded event handlers
// to the event-handler methods.
// ControlRemoved and ControlAdded are not available at design time.
this.add_ControlRemoved(new System.Windows.Forms.
ControlEventHandler(this.Control_Removed));
this.add_ControlAdded(new System.Windows.Forms.
ControlEventHandler(this.Control_Added));
} //Form1_Load
private void Control_Added(Object sender, System.Windows.Forms.
ControlEventArgs e)
{
MessageBox.Show("The control named " + e.get_Control().get_Name()
+ " has been added to the form.");
} //Control_Added
private void Control_Removed(Object sender, System.Windows.Forms.
ControlEventArgs e)
{
MessageBox.Show("The control named " + e.get_Control().get_Name()
+ " has been removed from the form.");
} //Control_Removed
// Click event handler for a Button control. Adds a TextBox to the form.
private void addControl_Click(Object sender, System.EventArgs e)
{
// Create a new TextBox control and add it to the form.
TextBox textBox1 = new TextBox();
textBox1.set_Size(new Size(100, 10));
textBox1.set_Location(new Point(10, 10));
// Name the control in order to remove it later.
// The name must be specified
// if a control is added at run time.
textBox1.set_Name("textBox1");
// Add the control to the form's control collection.
this.get_Controls().Add(textBox1);
} //addControl_Click
// Click event handler for a Button control.
// Removes the previously added TextBox from the form.
private void removeControl_Click(Object sender, System.EventArgs e)
{
// Loop through all controls in the form's control collection.
for (int iCtr = 0; iCtr < this.get_Controls().get_Count(); iCtr++) {
Control tempCtrl = this.get_Controls().get_Item(iCtr);
// Determine whether the control is textBox1,
// and if it is, remove it.
if (tempCtrl.get_Name().Equals("textBox1")) {
this.get_Controls().Remove(tempCtrl);
}
}
} //removeControl_Click
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, 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.
