发布于 2016-06-03 02:44:30 | 79 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的精品教程,程序狗速度看过来!

ASP.NET

ASP.NET 是.NET FrameWork的一部分,是一项微软公司的技术,是一种使嵌入网页中的脚本可由因特网服务器执行的服务器端脚本技术,它可以在通过HTTP请求文档时再在Web服务器上动态创建它们。 指 Active Server Pages(动态服务器页面) ,运行于 IIS(Internet Information Server 服务,是Windows开发的Web服务器)之中的程序 。


下面是一个完整的asp.net同时支持多图片上传一个实现,有需要的朋友可参考一下,本文章限制同时可上传8张图片,当然大可自己可修改更多或更少
前台代码如下:

<% @ 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" style="width: 300px"/>描述:<input name="text" type="text" style="width: 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> <link href="http://www.hzhuti.com/" rel="stylesheet" type="text/css" /> </head> <body style="background-image: url(../images/bg.jpg); text-align: center"> <form id="form1" runat="server"> <div> <table id="Table1" align="center" border="0" cellpadding="1" cellspacing="1" class="table" 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" style="width: 100px"> </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" style="width: 100px"> 请选择图片:<br /> </td> <td align="left"><P id="MyFile"><INPUT onclick="addFile()" type="button" value="增加图片(Add)"><br /> <input type="file" name="File" runat="server" style="width: 300px"/> 描述:<input name="text" type="text" style="width: 150px" maxlength="20" /> </td> </tr> <tr> <td align="right" style="width: 100px"> 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" style="width: 100px"> </td> <td align="left"> <asp:Button ID="btnUpload" runat="server" Text="开始上传" OnClick="btnUpload_Click" /> </td> </tr> <tr> <td align="right" style="width: 100px"> </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:

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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