本文介绍如何在ASP.NET WebForm5中使用枚举填充下拉列表，通过具体代码示例展示了枚举类型转换为列表项的过程，并实现动态加载。
<HTML>
<HEAD>
<title>WebForm5</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
</HEAD>
<BODY>
<form id="Form1" method="post" runat="server">
<asp:DropDownList id="drpStatus" style="Z-INDEX: 101; LEFT: 248px; POSITION: absolute; TOP: 72px"
runat="server"></asp:DropDownList>
</form>
</BODY>
</HTML>
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
namespace Document
{
/**//// <summary>
/// Summary description for WebForm5.
/// </summary>
public class WebForm5 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DropDownList drpStatus;
private void Page_Load(object sender, System.EventArgs e)
{
ListType();
}
private void ListType()
{
drpStatus.Items.Clear();
drpStatus.DataSource = ListTypeForEnum();
drpStatus.DataValueField = "value";
drpStatus.DataTextField = "text";
drpStatus.DataBind();
}
public static IList ListTypeForEnum()
{
ArrayList list = new ArrayList();
foreach (int i in Enum.GetValues(typeof(EnumActivityType)))
{
ListItem listitem = new ListItem(Enum.GetName(typeof(EnumActivityType), i), i.ToString());
list.Add(listitem);
}
return list;
}
public enum EnumActivityType
{
Task = 1,
Fax = 2,
Phone = 3,
Email = 4,
Reminder = 5,
Appointment = 6,
Expiration = 7,
Inquiry = 8
}
Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/**//// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}
<HEAD> <title>WebForm5</title> <meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR"> <meta content="C#" name="CODE_LANGUAGE"> <meta content="JavaScript" name="vs_defaultClientScript"> <meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema"> </HEAD> <BODY> <form id="Form1" method="post" runat="server"> <asp:DropDownList id="drpStatus" style="Z-INDEX: 101; LEFT: 248px; POSITION: absolute; TOP: 72px" runat="server"></asp:DropDownList> </form> </BODY></HTML>using System;using System.Collections;using System.ComponentModel;using System.Data;using System.Drawing;using System.Web;using System.Web.SessionState;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.HtmlControls;using System.Data.SqlClient;namespace Document{ /**//// <summary> /// Summary description for WebForm5. /// </summary> public class WebForm5 : System.Web.UI.Page { protected System.Web.UI.WebControls.DropDownList drpStatus; private void Page_Load(object sender, System.EventArgs e) { ListType(); } private void ListType() { drpStatus.Items.Clear(); drpStatus.DataSource = ListTypeForEnum(); drpStatus.DataValueField = "value"; drpStatus.DataTextField = "text"; drpStatus.DataBind(); } public static IList ListTypeForEnum() { ArrayList list = new ArrayList(); foreach (int i in Enum.GetValues(typeof(EnumActivityType))) { ListItem listitem = new ListItem(Enum.GetName(typeof(EnumActivityType), i), i.ToString()); list.Add(listitem); } return list; } public enum EnumActivityType { Task = 1, Fax = 2, Phone = 3, Email = 4, Reminder = 5, Appointment = 6, Expiration = 7, Inquiry = 8 } Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码 override protected void OnInit(EventArgs e) { // // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。 // InitializeComponent(); base.OnInit(e); } /**//// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// </summary> private void InitializeComponent() { this.Load += new System.EventHandler(this.Page_Load); } #endregion }}
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