C # file upload,

C # file upload,
I. Analysis

This blog mainly solves a series of problems such as file upload, which will be discussed in two aspects: files within 1 GB and files above 1 GB.

You can use the following three upload methods to upload files within 1 GB: use the Web Control FileUpload, html control HtmlInputFile, and Html element <input type = "file" id = "file"/> to Request. files upload.

For large files larger than 1 GB, the idea is:

(1) Protocol: http or ftp protocol can be used

(2) resumable upload

(3) Use plug-ins

(4) non-plug-in implementation

2. The file size is in the range of [0, 1G]

Upload the html control HtmlInputFile:

1. upload interface

2. Front-end code

<% @ Page Language = "C #" AutoEventWireup = "true" CodeBehind = "myInputFile. aspx. cs" Inherits = "FileUpLoad. WebForm2" %> <! DOCTYPE html> 
3. backend code
Protected void btnUpLoad_Click (object sender, EventArgs e) {// string serverpath = Server. MapPath ("~ /ImageFile "); if (file1.PostedFile. contentLength> 0) {if (File. exists (@ "C: \ Users \ WJM \ Desktop \ FilesUpLoad \" + file1.PostedFile. fileName) {Label1.Text = "the file already exists";} else {file1.PostedFile. saveAs (@ "C: \ Users \ WJM \ Desktop \ FilesUpLoad \" + file1.PostedFile. fileName); Label1.Text = "Upload successful! ";}} Else {Label1.Text =" Upload Failed ";}}
4. Configuration File
<? Xml version = "1.0" encoding = "UTF-8"?> <! -- For more information about how to configure ASP. NET applications, visit the http://go.microsoft.com/fwlink? LinkId = 169433 --> <configuration> <system. web> 
Note: If you are not familiar with configuration files, refer to my other blog: ASP. NET Web. config.
Web Control FileUpload implementation
1. upload interface
3. The file size is within the range of [1G, 10G]
 
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