如何將枚舉類型綁定到DropDownList？

Question

如果我有以下枚舉

public enum EmployeeType 
{ 
    Manager = 1, 
    TeamLeader, 
    Senior, 
    Junior 
} 

，我有DropDownList的，我想這個EmployeeType枚舉綁定到DropDownList的，有沒有辦法做到這一點？

Answer 1

，如果你有一個名爲DropDownList的對象的DDL，你可以做到這一點，如下

ddl.DataSource = Enum.GetNames(typeof(EmployeeType)); 
ddl.DataBind(); 

，如果你想枚舉值回選擇....

EmployeeType empType = (EmployeeType)Enum.Parse(typeof(EmployeeType), ddl.SelectedValue); 

Answer 2

我寫了一個輔助函數給我一本我可以綁定的字典：

public static Dictionary<int, string> GetDictionaryFromEnum<T>() 
{ 

    string[] names = Enum.GetNames(typeof(T)); 

    Array keysTemp = Enum.GetValues(typeof(T)); 
    dynamic keys = keysTemp.Cast<int>(); 

    dynamic dictionary = keys.Zip(names, (k, v) => new { 
     Key = k, 
     Value = v 
    }).ToDictionary(x => x.Key, x => x.Value); 

    return dictionary; 
} 

Answer 3

你可以使用lambda表達式

 ddl.DataSource = Enum.GetNames(typeof(EmployeeType)). 
     Select(o => new {Text = o, Value = (byte)(Enum.Parse(typeof(EmployeeType),o))}); 
     ddl.DataTextField = "Text"; 
     ddl.DataValueField = "Value"; 
     ddl.DataBind(); 

或LINQ

 ddl.DataSource = from Filters n in Enum.GetValues(typeof(EmployeeType)) 
       select new { Text = n, Value = Convert.ToByte(n) }; 
     ddl.DataTextField = "Text"; 
     ddl.DataValueField = "Value"; 
     ddl.DataBind(); 

Answer 4

下面是另一種方法：

Array itemNames = System.Enum.GetNames(typeof(EmployeeType)); 
foreach (String name in itemNames) 
{ 
    //get the enum item value 
    Int32 value = (Int32)Enum.Parse(typeof(EmployeeType), name); 
    ListItem listItem = new ListItem(name, value.ToString()); 
    ddlEnumBind.Items.Add(listItem); 
} 

我用這個鏈接做到這一點：

http://www.codeproject.com/Tips/303564/Binding-DropDownList-Using-List-Collection-Enum-an