ASP.NET基本控件（1）——FileUpload控件

前台代码：

<asp:FileUpload ID="fileUpload" runat="server" />
<asp:Button ID="btnUpload" runat="server" Text="上传" onclick="btnUpload_Click" />
<asp:Literal ID="literal" runat="server" />

后台代码：

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class Upload : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void btnUpload_Click(object sender, EventArgs e)
    {
        //判断是否上传了文件
        if (fileUpload.HasFile)
        {
            //指定上传文件在服务器上的保存路径
            string savePath = Server.MapPath("~/upload/");

            //检查服务器上是否存在这个物理路径，如果不存在则创建
            if (!System.IO.Directory.Exists(savePath))
            {
                System.IO.Directory.CreateDirectory(savePath);
            }

            savePath = savePath + "\\" + fileUpload.FileName;
            fileUpload.SaveAs(savePath);

            literal.Text = string.Format("<a href='upload/{0}'>upload/{0}</a>", fileUpload.FileName);
        }
    }
}