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关于文件上传

单个文件上传
****************************

     <table style="width: 343px">
            <tr>
                <td style="width: 100px">
                    单文件上传</td>
                <td style="width: 100px">
                </td>
            </tr>
            <tr>
                <td style="width: 100px">
                    <asp:FileUpload ID="txtFileUpload" runat="server" Width="475px" />
                    </td>
                <td style="width: 100px">
                    <asp:Button ID="BtUpload" runat="server" OnClick="bt_upload_Click" Text="上传" /></td>
            </tr>
            <tr>
                <td style="width: 100px; height: 21px;">
                    <asp:Label ID="lb_info" runat="server" ForeColor="Red" Width="183px"></asp:Label></td>
                <td style="width: 100px; height: 21px">
                </td>
            </tr>
        </table>

后台代码
------------------------------------------------------------------
   

protected void bt_upload_Click(object sender, EventArgs e)
    {
        string fileName, savePath;
        try
        {
            if (this.txtFileUpload.PostedFile.ContentLength == 0)
            {
                this.lb_info.Text = "请选择文件！";
            }
            else
            {
                fileName = txtFileUpload.PostedFile.FileName;
                savePath = Path.Combine(Server.MapPath("Upload"), Path.GetFileName(fileName));
                txtFileUpload.PostedFile.SaveAs(savePath);
                this.lb_info.Text = "上传成功！";
            }
        }
        catch (Exception ex)
        {
            this.lb_info.Text = "上传发生错误！原因是：" + ex.ToString();
        }
}


********************************************************
批量上传

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Upload2.aspx.cs" Inherits="Upload2" %>

<!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>无标题页</title>

    <script language="JavaScript">   
          function addFile()   
          {   
            var str = '<INPUT type="file" size="50" NAME="File">'   
            document.getElementById('MyFile').insertAdjacentHTML("beforeEnd",str)   
          }   
          
          function AddRow()
          { 
            // 表格的总行数
            var rowCount = upLoadTable.rows.length;
            
            // 添加行 
            var newTr = upLoadTable.insertRow();
            
            // 设置 id 属性
            var id = "Row" + rowCount.toString();
            newTr.setAttribute("id",id);
            
             
            // 添加列 
            var newTd0 = newTr.insertCell(); 
            
            // 设置列内容和属性，并且加上删除行方法
            newTd0.innerHTML = "<input type=\"file\" size=\"50\" name=\"File\"><input type=\"button\" value=\"删除\" onClick=\"DelRow(this.parentElement.parentElement.rowIndex);\"/>"; 
             
          }
          function DelRow(index)
          {
            upLoadTable.deleteRow(index);
          }
    </script>

</head>
<body>
    <form id="form1" method="post" runat="server" enctype="multipart/form-data">
        <table id="upLoadTable" border="1" align="center" width="500px">
            <tr id="Row1">
                <td>
                    <input type="file" size="50" name="File"><input type="button" value="删除" onclick="DelRow(this.parentElement.parentElement.rowIndex);" />
                </td>
            </tr>
        </table>
        <p align="center">
            <input type="button" value="增加(Add)" onclick="AddRow();">
            <asp:Button runat="server" Text="上传" ID="Upload" OnClick="Upload_Click"></asp:Button>
            <input onclick="this.form.reset()" type="button" value="重置(ReSet)">
        </p>
        </tr>
        <p align="center">
            <asp:Label ID="showMsg" runat="server" Font-Names="宋体" Font-Bold="True" Font-Size="9pt"
                Width="500px" BorderStyle="None" BorderColor="White"></asp:Label>
        </p>
    </form>
</body>
</html>



------------------------------------------------------------------------------
后台代码：

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

public partial class Upload2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Upload_Click(object sender, EventArgs e)
    {
        this.showMsg.Text =String.Empty;
        string savePath = Server.MapPath("Upload"); // 上传路径 
        System.Web.HttpFileCollection files = System.Web.HttpContext.Current.Request.Files;
        try
        {
            for (int i = 0; i < files.Count; i++)
            {
                HttpPostedFile file = files[i] as System.Web.HttpPostedFile;
                if (file != null && file.ContentLength != 0)
                {
                    file.SaveAs(Path.Combine(savePath, Path.GetFileName(file.FileName)));
                    this.showMsg.Text += "文件 "+file.FileName + " 上传成功<br>";
                }
            }
        }
        catch(Exception ex)
        {
            this.showMsg.Text = ex.Message;
        }
    }
}


***********************************************************************

posted on 2007-11-24 17:33 白开心 阅读(265) 评论(0)  编辑 收藏 引用 所属分类: .Net（学习ing...）
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