asp.net多图片上传实现程序代码
asp.net多图片上传实现程序代码
发布时间:2016-12-29 来源:查字典编辑
摘要:前台代码如下:复制代码代码如下:无标题页vari=1functionaddFile(){if(i后台代码如下:复制代码代码如下:usingS...

前台代码如下:

复制代码 代码如下:

<% @ Page Language="C#" CodeFile="UploadImg.aspx.cs" Inherits="NetAdmin_APicture_UploadImg" %>

<!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 type="text/javascript">

var i=1

function addFile()

{

if (i<8)

{var str = '<BR> <input type="file" name="File" runat="server"/>描述:<input name="text" type="text" 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>

<link href="http://www.hzhuti.com/" rel="stylesheet" type="text/css" />

</head>

<body>

<form id="form1" runat="server">

<div>

<table id="Table1" align="center" border="0" cellpadding="1" cellspacing="1"

style="height: 58px" width="620">

<tr>

<td align="center" background="../images/topbg1.jpg">

<font color="#0000ff" face="宋体" size="3"><strong>上传图片</strong></font></td>

</tr>

<tr>

<td align="center">

</td>

</tr>

<tr>

<td align="center">

<asp:Panel ID="Panel5" runat="server" Width="608px">

<table width="100%">

<tr>

<td align="right">

</td>

<td align="left">

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">

请选择图片:<br />

</td>

<td align="left"><P id="MyFile"><INPUT type="button" value="增加图片(Add)"><br />

<input type="file" name="File" runat="server"/>

描述:<input name="text" type="text" maxlength="20" />

</td>

</tr>

<tr>

<td align="right">

上传到的图库:</td>

<td align="left">

<asp:DropDownList ID="ddlAlbum" runat="server" DataSourceID="SqlDataSource1"

DataTextField="AlbumName" DataValueField="AlbumID">

</asp:DropDownList><asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:WebJakeCS %>"

SelectCommand="SELECT [AlbumID], [AlbumName] FROM [WB_Album] ORDER BY [AlbumID] DESC">

</asp:SqlDataSource>

</td>

</tr>

<tr>

<td align="right">

</td>

<td align="left">

<asp:Button ID="btnUpload" runat="server" Text="开始上传" />

</td>

</tr>

<tr>

<td align="right">

</td>

<td align="left">

<asp:Label ID="lblMessage" runat="server" Font-Bold="True" ForeColor="Red"></asp:Label></td>

</tr>

</table>

</asp:Panel>

</td>

</tr>

<tr>

<td align="center">

<font face="宋体"></font><font face="宋体"> </font>

</td>

</tr>

<tr>

<td align="center">

<font face="宋体"></font>

</td>

</tr>

</table>

</div>

</form>

</body>

</html>

后台代码如下:

复制代码 代码如下:

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 NetAdmin_APicture_UploadImg : 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 dirname = "pic00" + ddlAlbum.SelectedValue.Trim();

string dirpath = Server.MapPath("http://www.iiwnet.com/php");

dirpath = dirpath + "" + dirname;

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 = "";

string PicPath = "";

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);

string FJname = FileName;

PicPath = "PicBase" + "" + dirname + "" + NewName + FileExtention;

}

AddPicture(PicPath, rd[i], albumid);//将图片信息保存到数据库

if (name == 1)//如果为每次更新的第一张图片,则将它更新为象册的封面

...{

upFirstimg(albumid, PicPath);

}

name = name + 1;//用来重命名规则的变量

}

}

else

...{

lblMessage.Text = strmsg.ToString();

lblMessage.Visible = true;

}

}

private void AddPicture(string imgpath,string imgnote,string albumid)

...{

string sql = "insert WB_AlbumImges(ImgPath,ImgNote,AlbumID) values('"+imgpath+"','"+imgnote+"','"+albumid+"')";

DB mydb = new DB();

mydb.RunProc(sql);

}

private void upFirstimg(string albumid,string firstimg)

...{

string sql = "update WB_Album set FirstImg='"+firstimg+"' where AlbumID="+albumid;

DB mydb = new DB();

mydb.RunProc(sql);

}

}

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