The simple implementation of C # attachment upload

Last Update:2018-07-17 Source: Internet

Author: User

Tags servervariables

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Submit.aspx

<%@ Page language= "C #" autoeventwireup= "true" aspcompat= "true" codefile= "Submit.aspx.cs" inherits= "Submit"%>

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">

<title> Untitled Page </title>
<body bgcolor= "#dae5e9" >
<form id= "Form1" runat= "Server" >
<table width= "780" border= "0" cellspacing= "0" cellpadding= "0" align= "center" >
<tr bgcolor= "#A3CEEE" >
&LT;TD height= ><strong> Select and upload accessories </strong></td>
</tr>
<tr>
&LT;TD height= ">1", click "Browse ..." button, select the attachment you want to submit;</td>
</tr>
<tr>
&LT;TD height= "><asp:fileupload" id= "FileUpload1" runat= "Server"/></td>
</tr>
<tr>
&LT;TD height= ">2", click <asp:button id= "btnupload" runat= "server" text= "upload" onclick= "btnupload_click"/> Button, Upload the attachment;</td>
</tr>
<tr>
&LT;TD height= ">3", if you need to submit more than one attachment, please repeat the steps 1 and 2 above;</td>
</tr>
<tr>
&LT;TD height= ">4", all the attachments after uploading, click <asp:button id= "btnsave" runat= "Server" text= "complete" onclick= "Btnsave_click"/ > button to return. </td>
</tr>
<tr bgcolor= "#A3CEEE" >
&LT;TD height= ><strong> Remove unwanted attachments </strong> (Please select the attachment you want to delete, then click the <strong> Remove </strong> button.) ) </td>
</tr>
<tr>
&LT;TD height= > Accessories list:
<asp:dropdownlist id= "Attachments" runat= "Server" >
<asp:listitem value= "-1" selected= "True" > Attachment list ...</asp:listitem>
</asp:DropDownList>
<asp:button id= "Btndelete" runat= "server" text= "delete" onclick= "Btndelete_click"/>
Total: <asp:label id= "Lbattachfilenumber" runat= "server" text= "0" width= "40px" ></asp:Label> Accessories
Total size: <asp:label id= "lbfilesize" runat= "server" text= "0" width= "40px" ></asp:Label> bytes
</td>
</tr>
</table>
</form>
</body>

**********************************************************************

Submit.aspx.cs

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 Submit:System.Web.UI.Page
{
protected void Page_Load (object sender, EventArgs e)
{
if (! IsPostBack)
{//involved in the database, need to display the attachment list and other related content (omitted here)
}
}

Number of attachments
int _attachfilenumber;
public int Attachfilenumber
{
get {return this._attachfilenumber;}
set {This._attachfilenumber = value;}
}

Total size of attachment
int _filesize;
public int FileSize
{
get {return this._filesize;}
set {this._filesize = value;}
}

directory where attachments are located
String _attachmentlinks = "";
public string Attachmentlinks
{
get {return this._attachmentlinks;}
set {this._attachmentlinks = value;}
}

protected void Btnupload_click (object sender, EventArgs e)
{
Try
{
if (this. FileUpload1.FileName.Length > 0)
{
string filename = "";

filename = this. Fileupload1.filename;
filename = DateTime.Now.ToString ("YYYYMMDDHHMMSS") + filename;

This. FileUpload1.PostedFile.SaveAs (request.servervariables["Appl_physical_path"] + "temp//" + filename);

THIS.ATTACHMENTS.ITEMS.ADD (filename) (new ListItem);

_attachfilenumber = Int. Parse (This.lbAttachFileNumber.Text) + 1;
This.lbAttachFileNumber.Text = _attachfilenumber.tostring ();

_filesize = Int. Parse (This.lbFileSize.Text) + this. FileUpload1.PostedFile.ContentLength;
This.lbFileSize.Text = _filesize. ToString ();

}
Else
{
Response.Write (' <script>alert (') please select an attachment. ') </script> ");
}
}
catch (Exception ex)
{
Response.Write (ex. Message.tostring ());
}
}
protected void Btnsave_click (object sender, EventArgs e)
{//involving the database, implementing the operations saved to the database (omitted here).

}
protected void Btndelete_click (object sender, EventArgs e)
{
Try
{
String ppath = request.servervariables["Appl_physical_path"] + "temp//" + this.attachments.SelectedItem;
This.attachments.Items.Remove (This.attachments.SelectedItem);
if (file.exists (Ppath))
{
FileInfo FileInfo = new FileInfo (Ppath);
_attachfilenumber = Int. Parse (This.lbAttachFileNumber.Text)-1;
int fsize = Convert.ToInt32 (FileInfo. Length);
_filesize = Int. Parse (This.lbFileSize.Text)-fsize;
This.lbAttachFileNumber.Text = _attachfilenumber.tostring ();
This.lbFileSize.Text = _filesize. ToString ();
File.delete (Ppath);
}
}
catch (Exception ex)
{
Response.Write (ex. Message.tostring ());
}
}
}

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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