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operation of jquery.
ProcessData
jquery converts the data object into a string to send an HTTP request, which by default is application/x-www-form-urlencoded converted using encoding. contentType: falsethe conversion will fail after we set it up, so the setting processData: false prevents the conversion process.
The data we give you is the Formdata code, and you don't need
Example of asp.net core multipart Upload File, asp. netcore
After writing the asp.net multi-File Upload, I feel that this upload still has many defects... (10 thousand words are omitted, not nonsense ). I chose the open-source asp
Used before the ajaxfileupload, but the feeling is not very easy to use, today, the front-end file on the issue of a point, simply a lunch break on their own extended a simple jQuery ajax upload file plug-ins, need to use the upload function of the page, just in the
is now a pure ASP.
Ii. Analysis of ASP-based file upload implementation principles
The basic principle is to use the binaryread method of the ADO Stream object to read all the data in the form, extract the required file data, and save the disk as a binary file.
The following is an
This time to share a simple upload avatar example, the approximate process is:
First, convert the selected picture to Base64 string
Functionpreview (file) {// Preview picture to get picture base64
Varprevdiv = document.getElementById (' preview ');
When the elements are copied in IE, the values are not replicated, so the goal of emptying the file domain is achieved. And in Firefox, where the value will also be copied together, then we will be able to empty a bit of compatibility. The code is as follows:
The code is as follows
Copy Code
var file = $ ("#fileid");File.after (File.clone (). Val (""));File.remove ();
} nbsp; nbsp;nbsp;nbsp;nbsp;protectednbsp;functionnbsp;getuploaddir () nbsp;nbsp; nbsp;nbsp;{nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;//nbsp;getnbsp;ridnbsp;ofnbsp;thenbsp;__dir_ _NBSP;SONBSP;ITNBSP;DOESN ' Tnbsp;screwnbsp;up nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;//nbsp;when
nbsp;displayingnbsp;uploadednbsp;doc/imagenbsp;innbsp;thenbsp;view.
nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;returnnbsp; ' uploads/documents '; NBSP;NBSP;NBSP;NBSP}}
The document entity has a name associated with the
uploaded file
Or
Copy Code code as follows:
The contents of the $_files array in the example above are shown below. We assume that the File upload field name is UserFile (name can be arbitrarily named)
$_files[the original name of the ' UserFile ' [' Name '] client machine file.The MIME
This example describes the CI framework file upload class and image processing class usage. Share to everyone for your reference, specific as follows:
List page banner picture public function Edit_list_page_banner ($category _id= "") {$category _id= empty ($category _id)? $_post["
category_id "]: $category _id; Upload
This article mainly introduces two examples of Codeigniter file batch upload controller writing. For more information, see
Example 1:
/*** Multifile upload *** @ author Dream
*/Public function multiple_uploads () {// load the required class library $ this-> load-> library ('
Recently made a multi-file upload, you need to limit the upload file type examples. Have not done before to find some information, the next useful. At the same time also for everyone to do reference.The relative path to the uploader:uploadify.swf file, which is a button with
-s_3187912989.png "title=" 5.png "alt=" Wkiom1eq8josxumnaai3-kdfuxc717.png-wh_50 "/>OK, now we have successfully obtained flag.Now let's say how this experiment is implemented:1. Why add
Put on your coat file upload
Upload a normal picture.650) this.width=650; "Src=" Http://s5.51cto.com/wyfs02/M01/84/75/wKioL1eQ8Yjz_KUcAAF_fGZhspg079.png-wh_500x0-w
File upload simple implementation is very easy, but want higher requirements, such as uploading files through Ajax, upload multiple files at a time, file size, etc., this hole is not very easy to fill (for beginners). So here I'm going to implement
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