asp.net multi picture upload implementation program code

2020-05-17 05:18:16
OfStack

The foreground code is as follows:


<% @ 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> No title page </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"/> describe :<input name="text" type="text" style="width: 150px" maxlength="20" />'
document.getElementById('MyFile').insertAdjacentHTML("beforeEnd",str)
}
else
{
alert(" you 1 The maximum number of uploads is 8 image !")
}
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=" Song typeface " size="3"><strong> To upload pictures </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">
 instructions : Click the add picture button 1 Upload more than one picture at a time , Can be written for each picture 1 Sentence of no more than 20 A word description . The size of single picture should not be larger than 1024k</td>
</tr>
<tr>
<td align="right" style="width: 100px">
 Please select picture :<br />
</td>
<td align="left"><P id="MyFile"><INPUT onclick="addFile()" type="button" value=" Add photos (Add)"><br />
<input type="file" name="File" runat="server" style="width: 300px"/>
 describe :<input name="text" type="text" style="width: 150px" maxlength="20" />
</td>
</tr>
<tr>
<td align="right" style="width: 100px">
 Upload to the gallery :</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=" To upload " 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=" Song typeface "></font><font face=" Song typeface "> </font>
</td>
</tr>
<tr>
<td align="center">
<font face=" Song typeface "></font>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>

The background code is as follows:


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(',');// Gets an array of text box strings for the image description , A description for the corresponding picture 
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)// A single file cannot be greater than 1024k
...{
strmsg.Append(Path.GetFileName(postedfile.FileName) + "--- Is not greater than 1024k<br>");
break;
}
string fex = Path.GetExtension(postedfile.FileName);
if (fex != ".jpg" && fex != ".JPG" && fex != ".gif" && fex != ".GIF")
...{
strmsg.Append(Path.GetFileName(postedfile.FileName) + "--- Wrong picture format , Can only be jpg or gif<br>");
break;
}
}
}
if (strmsg.Length <= 0)// No problem with the size and format of the illustration 
...{
// Here is the create gallery directory 
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();// produce 1 Three random Numbers are used for the newly named image 
string NewName =DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString()+DateTime.Now.Millisecond.ToString()+stro;
if (FileName.Length > 0)// Upload the file and save it to the database 
...{
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);// Save the image information to the database 
if (name == 1)// If for each update of the first 1 image , Update it to the cover of the book 
...{
upFirstimg(albumid, PicPath);
}
name = name + 1;// The variable used to rename the rule 
}
}
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);
}
}