我遵循了这里给出的建议:How to bind Enum to combobox with empty field in C#但它给了我一些无法使用的内容:
不我希望看到的内容......以下是我用来绑定的代码:
comboBox2.DataSource = GetDataSource(typeof (MessageLevel), true);
这是背景:
public enum MessageLevel
{
[Description("Information")]
Information,
[Description("Warning")]
Warning,
[Description("Error")]
Error
}
----
public static string GetEnumDescription(string value)
{
Type type = typeof(MessageLevel);
var name = Enum.GetNames(type).Where(f => f.Equals(value, StringComparison.CurrentCultureIgnoreCase)).Select(d => d).FirstOrDefault();
if (name == null)
{
return string.Empty;
}
var field = type.GetField(name);
var customAttribute = field.GetCustomAttributes(typeof(DescriptionAttribute), false);
return customAttribute.Length > 0 ? ((DescriptionAttribute)customAttribute[0]).Description : name;
}
public static List<object> GetDataSource(Type type, bool fillEmptyField = false)
{
if (type.IsEnum)
{
var data = Enum.GetValues(type).Cast<Enum>()
.Select(E => new { Key = (object)Convert.ToInt16(E), Value = GetEnumDescription(E.ToString()) })
.ToList<object>();
var emptyObject = new { Key = default(object), Value = "" };
if (fillEmptyField)
{
data.Insert(0, emptyObject); // insert the empty field into the combobox
}
return data;
}
return null;
}
如何进行正确的绑定并添加一个空条目?
答案 0 :(得分:1)
因此解决方案是在ComboBox上设置Key
和Value
属性,以便它知道如何处理comboBox2.DataSource = GetDataSource(typeof (MessageLevel), true);
comboBox2.DisplayMember = "Value";
comboBox2.ValueMember = "Key";
和{{1}}属性。
{{1}}