ASP.NET(C#)实现一次性动态上传多张图片的代码（多(2)

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.cnblogs.com/PicBase");
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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