57 lines
1.5 KiB
C#
57 lines
1.5 KiB
C#
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namespace ComponentsLab
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{
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public partial class VisualSelectionComponent : UserControl
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{
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private EventHandler? _changeComboBox;
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public VisualSelectionComponent()
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{
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InitializeComponent();
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}
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//Публичное свойство (set, get) для установки и получения выбранного значения (возвращает пустую строку, если нет выбранного значения)
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public string comboBoxSelectedValue
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{
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get
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{
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if (comboBoxComponent.SelectedItem != null)
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{
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return comboBoxComponent.GetItemText(comboBoxComponent.SelectedItem);
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}
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else
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{
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return string.Empty;
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}
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}
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set
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{
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if (comboBoxComponent.SelectedIndex != -1)
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{
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comboBoxComponent.Items[comboBoxComponent.SelectedIndex] = value;
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}
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}
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}
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// Событие, вызываемое при смене значения в ComboBox
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public event EventHandler ChangeComboBox
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{
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add { _changeComboBox += value; }
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remove { _changeComboBox -= value; }
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}
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private void comboBoxComponent_SelectedIndexChanged(object sender, EventArgs e)
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{
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_changeComboBox?.Invoke(this, e);
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}
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// Отдельный публичный метод отчистки списка
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private void buttonClear_Click(object sender, EventArgs e)
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{
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comboBoxComponent.Items.Clear();
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comboBoxComponent.Text = string.Empty;
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comboBoxComponent.SelectedItem = null;
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MessageBox.Show($"The list has been cleared");
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}
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}
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}
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