• ASP.NET(C#)实现一次性上传多张图片(多个文件)



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

    <!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>ASP.NET(C#)实现一次性上传多张图片(多个文件)</title>
       
    <script type="text/javascript">
    var i=1
    function addFile()
    {

     if (i<8)
        {var str = '<BR> <input type="file" name="File" runat="server" style=" 200px"/>描述:<input name="text" type="text" style=" 150px" maxlength="20" />'
        document.getElementById('MyFile').insertAdjacentHTML("beforeEnd",str)

        }
    else
        {
            alert("您一次最多只能上传8张图片!")
        }
        i++
    }
    </script>
           
           
    </head>
    <body>
        <form id="form1" runat="server">
       <div>
            <table id="Table1" align="center" border="0" cellpadding="1" cellspacing="1" class="table">

                <tr>
                    <td align="center">
                        <font color="#0000ff" face="宋体" size="3"><strong>上传图片</strong></font></td>
                </tr>
                <tr>
                    <td align="center" style=" 734px">
                        &nbsp;</td>
                </tr>
                <tr>
                    <td align="center" style=" 734px">
                        <asp:Panel ID="Panel5" runat="server">
                            &nbsp; &nbsp;<table width="100%">
                                <tr>
                                    <td align="right" style=" 100px">
                                    </td>
                                    <td align="left" style=" 500px">
                                        说明:点增加图片按钮可一次上传多张图片,可为每张图片写上一句不超过20个字的描述。单张图片大小不大于1024k</td>
                                </tr>
                                <tr>
                                    <td align="right" style=" 100px">
                                        请选择图片:<br />
                                    </td>
                                    <td align="left" style=" 500px"><p id="MyFile"><input onclick="addFile()" type="button" value="增加图片(Add)"></p><br />
                                        <input id="File1" type="file" name="File" runat="server" style=" 245px"/>
                                        描述:<input name="text" type="text" style=" 150px" maxlength="20" />
                                    </td>
                                </tr>

                                <tr>
                                    <td align="right" style=" 100px">
                                    </td>
                                    <td align="left" style=" 500px">
                                        <asp:Button ID="btnUpload" runat="server" Text="开始上传" OnClick="btnUpload_Click"  />
                                        </td>
                                </tr>
                                <tr>
                                    <td align="right" style=" 100px">
                                    </td>
                                    <td align="left" style=" 500px">
                                        <asp:Label ID="lblMessage" runat="server" Font-Bold="True" ForeColor="Red"></asp:Label></td>
                                </tr>
                            </table>
                        </asp:Panel>
                        &nbsp;
                    </td>
                </tr>
                <tr>
                    <td align="center" style=" 734px">
                        <font face="宋体"></font><font face="宋体">&nbsp;</font>
                    </td>
                </tr>
            </table>
       
        </div>
       
        </form>
    </body>
    </html>



    +++++++++++++++++++++++++++++++++++++++++++++  cs文件

    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 FileUp : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
        protected void btnUpload_Click(object sender, EventArgs e)
        {
            lblMessage.Text = "";
            lblMessage.Visible = false;
            System.Web.HttpFileCollection files = System.Web.HttpContext.Current.Request.Files;
            System.Text.StringBuilder strmsg = new System.Text.StringBuilder("");
            string[] rd = Request.Form[1].Split(',');//获得图片描述的文本框字符串数组,为对应的图片的描述
            //string albumid=ddlAlbum.SelectedValue.Trim();
            int ifile;
            for (ifile = 0; ifile < files.Count; ifile++)
            {
                if (files[ifile].FileName.Length > 0)
                {
                    System.Web.HttpPostedFile postedfile = files[ifile];
                    if (postedfile.ContentLength / 1024 > 1024)//单个文件不能大于1024k
                    {
                        strmsg.Append(Path.GetFileName(postedfile.FileName) + "---不能大于1024k<br>");
                        break;
                    }
                    string fex = Path.GetExtension(postedfile.FileName);
                    if (fex != ".jpg" && fex != ".JPG" && fex != ".gif" && fex != ".GIF")
                    {
                        strmsg.Append(Path.GetFileName(postedfile.FileName) + "---图片格式不对,只能是jpg或gif<br>");
                        break;
                    }
                }
            }
            if (strmsg.Length <= 0)//说明图片大小和格式都没问题
            {
                //以下为创建图库目录
                string dirpath = Server.MapPath("51aspx");

                if (Directory.Exists(dirpath) == false)
                {
                    Directory.CreateDirectory(dirpath);
                }
                Random ro = new Random();
                int name = 1;
                for (int i = 0; i < files.Count; i++)
                {
                    System.Web.HttpPostedFile myFile = files[i];
                    string FileName = "";
                    string FileExtention = "";
                    FileName = System.IO.Path.GetFileName(myFile.FileName);
                    string stro = ro.Next(100, 100000000).ToString() + name.ToString();//产生一个随机数用于新命名的图片
                    string NewName = DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + DateTime.Now.Millisecond.ToString() + stro;
                    if (FileName.Length > 0)//有文件才执行上传操作再保存到数据库
                    {
                        FileExtention = System.IO.Path.GetExtension(myFile.FileName);

                        string ppath = dirpath + @"\" + NewName + FileExtention;
                        myFile.SaveAs(ppath);

                    }

                    name = name + 1;//用来重命名规则的变量

                }

                Response.Write("<script>alert('恭喜,图片上传成功!')</script>");
            }
            else
            {
                lblMessage.Text = strmsg.ToString();
                lblMessage.Visible = true;
            }
        }
    }

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  • 原文地址:https://www.cnblogs.com/Fooo/p/991033.html
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