【WPF】【C#】【代码记录】构造ComboBox下拉的数据源（字典类型 Dictionary<string, T> T : Enum）

春天花会开, / 2024-10-23 / 原文

#region 下拉
private Dictionary<string, T> getComboSource<T>(params T[] types) where T : Enum
{
    var enumValues = types.Length > 0 ? types : (T[])Enum.GetValues(typeof(T));
    return enumValues.ToDictionary(o => getTypeName(o), o => o);
}

private string getTypeName<T>(T type) where T : Enum
{
    var member = type.GetType().GetMember(type.ToString());
    if (member.Length > 0)
    {
        var attributes = member[0].GetCustomAttributes(typeof(DisplayAttribute), false);
        if (attributes.Length > 0)
        {
            return ((DisplayAttribute)attributes[0]).GetName();
        }
    }

    return type.ToString();
}
#endregion

调用的方式例如：

/// <summary>
/// 形状下拉
/// </summary>
public Dictionary<string, ShapeType> CalibrationShapeTypeComboSource
{
    get { return _calibrationShapeTypeComboSource; }
    set { SetProperty(ref _calibrationShapeTypeComboSource, value); }
}

/// <summary>
/// 有效、禁用区域下拉
/// </summary>
public Dictionary<string, AreaType> AreaTypeComboSource
{
    get { return _areaTypeComboSource; }
    set { SetProperty(ref _areaTypeComboSource, value); }
}


// 这样调用
CalibrationShapeTypeComboSource = getComboSource(ShapeType.Rectangle, ShapeType.Circle, ShapeType.RotatedRectangle, ShapeType.LineSegment);
// 如果传了参数，按照参数的来；如果没传参，获取枚举的所有值
AreaTypeComboSource = getComboSource<AreaType>();

结果：

枚举要声明Display

public enum ShapeType
{
    None,
    /// <summary>
    /// 线段
    /// </summary>
    [Display(Name = "线段")]
    LineSegment,

    /// <summary>
    /// 矩形
    /// </summary>
    [Display(Name = "矩形")]
    Rectangle,

    /// <summary>
    /// 旋转矩形
    /// </summary>
    [Display(Name = "旋转矩形")
    RotatedRectangle,

    /// <summary>
    /// 圆形
    /// </summary>
    [Display(Name = "圆形")]
    Circle,

    /// <summary>
    /// 多边形
    /// </summary>
    [Display(Name = "多边形")]
    Polygon
}

 public enum AreaType
 {
     /// <summary>
     /// 有效区
     /// </summary>
     [Display(Name = "有效区")]
     ValidArea,
     /// <summary>
     ///  屏蔽区
     /// </summary>
     [Display(Name = "屏蔽区")]
     MaskedArea,
     /// <summary>
     /// 禁用区
     /// </summary>
     [Display(Name = "禁用区")]
     DisabledArea
 }