最近看到string有join這個用法..還不錯用..介紹給大家呀...
有時我們會將一個集合資料以","分隔組合成一字串..例如:aaa,bbb,ccc
利用String.Join就可以做到了...省下很多程式碼的判斷....
asp.net(c#)
strJoin.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="strJoin.aspx.cs" Inherits="strJoin" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>strJoin</title> </head> <body> <form id="form1" runat="server"> <div> <asp:CheckBoxList ID="CheckBoxList1" runat="server" RepeatDirection="Horizontal"> <asp:ListItem>F6 Team</asp:ListItem> <asp:ListItem>Puma</asp:ListItem> <asp:ListItem>Dotblogs</asp:ListItem> <asp:ListItem>tech‧ed 2008</asp:ListItem> </asp:CheckBoxList> <br /> <asp:TextBox ID="TextBox1" runat="server" Width="300px"></asp:TextBox> <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Join" /> </div> </form> </body> </html>
strJoin.aspx.cs
using System; using System.Collections.Generic; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Collections.Generic; public partial class strJoin : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { List<string> list = new List<string>(); foreach (ListItem item in this.CheckBoxList1.Items) { if (item.Selected) { list.Add(item.Text); } } this.TextBox1.Text = string.Join(",",list.ToArray()); } }
執行結果:
參考網址:
http://msdn.microsoft.com/zh-tw/library/57a79xd0(VS.80).aspx