/// <summary>
/// 设置ComboBox枚举选中项
/// </summary>
/// <typeparam name="T">枚举</typeparam>
/// <param name="combox">ComboBox</param>
/// <param name="enumValue">选中项值</param>
public static void SetEnumToComboBox <T>(System.Windows.Forms.ComboBox combox, T enumValue) where T : struct
{
Type enumType = typeof(T);
EnumEx.AssertEnum(enumType);
if (combox == null)
{
throw new ArgumentNullException(nameof(combox), "目标控件不能为null");
}
if (combox.Items.Count == 0)
{
return;
}
try
{
for (int i = 0; i < combox.Items.Count; i++)
{
if (object.Equals(enumValue, ((FieldInfoEx)combox.Items[i]).Value))
{
combox.SelectedIndex = i;
return;
}
}
throw new Exception(string.Format("枚举类型:{0}与绑定到ComboBox的枚举类型不匹配", enumType.FullName));
}
catch (Exception ex)
{
throw new Exception("设定值失败", ex);
}
}
/// <summary>
/// 绑定枚举值到ComboBox
/// </summary>
/// <typeparam name="T">枚举</typeparam>
/// <param name="combox">ComboBox</param>
/// <param name="defaultSelectedValue">默认选中项值</param>
/// <param name="ignoreList">忽略项列表</param>
public static void BindingEnumToComboBox <T>(System.Windows.Forms.ComboBox combox, T defaultSelectedValue, IEnumerable <T> ignoreList = null) where T : struct
{
Type enumType = typeof(T);
EnumEx.AssertEnum(enumType);
if (combox == null)
{
throw new ArgumentNullException(nameof(combox), "目标控件不能为null");
}
if (ignoreList == null)
{
ignoreList = new List <T>();
}
try
{
combox.Items.Clear();
List <FieldInfoEx> items = EnumEx.GetEnumFieldInfoExList(enumType);
if (items.Count == 0)
{
return;
}
int selectedIndex = -1;
for (int i = 0; i < items.Count; i++)
{
var item = items[i];
bool isIgnore = (from ignoreItem in ignoreList where object.Equals(item.Value, ignoreItem) select ignoreItem).Count() > 0;
if (isIgnore)
{
continue;
}
if (object.Equals(item.Value, defaultSelectedValue))
{
selectedIndex = i;
}
combox.Items.Add(item);
}
combox.DisplayMember = nameof(FieldInfoEx.DisplayName);
combox.SelectedIndex = selectedIndex == -1 ? 0 : selectedIndex;
}
catch (Exception ex)
{
throw new Exception("绑定值失败", ex);
}
}
/// <summary>
/// 获取ComboBox枚举选中项
/// </summary>
/// <typeparam name="T">枚举类型</typeparam>
/// <param name="combox">ComboBox</param>
/// <returns>选中项枚举值</returns>
public static T GetEnumFromComboBox <T>(System.Windows.Forms.ComboBox combox) where T : struct
{
EnumEx.AssertEnum <T>();
if (combox == null)
{
throw new ArgumentNullException(nameof(combox), "目标控件不能为null");
}
try
{
FieldInfoEx selectedItem = (FieldInfoEx)(combox.Items[combox.SelectedIndex]);
return((T)selectedItem.Value);
}
catch (Exception ex)
{
throw new Exception("获取值失败", ex);
}
}