Image upload function demo, using HTML5 's Clipboard API interface

Last Update:2015-08-26 Source: Internet

Author: User

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<%@ page language= "C #" autoeventwireup= "true" codebehind= "WebForm1.aspx.cs" inherits= "Testapi.webform1"%>

<style>

div#editable {

width:400px;

height:300px;

border:1px dashed blue;

}

</style>

Window.onload = function () {

function Paste_img (e) {

if (E.clipboarddata.items) {

Google-chrome

Alert (' Support Clipboarddata.items (chrome ...) ');

Ele = E.clipboarddata.items

for (var i = 0; i < ele.length; ++i) {

if (Ele[i].kind = = ' file ' && ele[i].type.indexof (' image/')!==-1) {

var blob = Ele[i].getasfile ();

Console.log (Bloburl);

Readblobasdataurl (blob, function (URL) {

var len = document.getElementById ("editable"). getElementsByTagName ("img"). length + 1;

var new_img = document.createelement (' img ');

New_img.setattribute (' name ', ' Imgpic ');

New_img.setattribute (' id ', ' imgpic ' + len);

New_img.setattribute (' src ', url);

New_img.setattribute ("width", 600);

New_img.setattribute ("height", 450);

document.getElementById (' editable '). appendchild (NEW_IMG);

});

}

} else {

Alert (' Non-chrome ');

}

document.getElementById (' editable '). Onpaste = function () {paste_img (event); return false;};

}

function Save ()

{

var omyform = new FormData ();

Omyform.append ("username", "Groucho");

Omyform.append ("AccountNum", 123456);

Alert (document.getElementById ("Imgpic"). getattribute (' src '));

The files selected by the user are already included in the Fileinputelement

Omyform.append ("UserFile", document.getElementById ("Imgpic"). getattribute (' src '));

var ofilebody = "<a id=\" a\ "><b id=\" b\ ">hey!</b></a>"; Blob object contains the file contents

for (var i = 1; I <= document.getElementById ("editable"). getElementsByTagName ("img"). Length; i++) {

var Oblob = Dataurltoblob (document.getElementById ("Imgpic" +i). getattribute (' src ')); New Blob ([Ofilebody], {type: "Text/xml"});

Omyform.append ("Webmasterfile", Oblob);

}

var oreq = new XMLHttpRequest ();

Oreq.open ("POST", "http://localhost:42516/WebForm1.aspx");

Oreq.send (Omyform);

}

function Dataurltoblob (dataurl) {

var arr = dataurl.split (', ');

var mime = arr[0].match (/:(. *?);/) [1],

BSTR = Atob (arr[1]), n = bstr.length, U8arr = new Uint8array (n);

while (n--) {

U8arr[n] = bstr.charcodeat (n);

}

return new Blob ([U8arr], {type:mime});

}

function Readblobasdataurl (BLOB, callback) {

var a = new FileReader ();

A.onload = function (e) {callback (e.target.result);};

A.readasdataurl (BLOB);

}

</script>

<body >

</body>

Using System;

Using System.Collections.Generic;

Using System.Linq;

Using System.Web;

Using System.Web.UI;

Using System.Web.UI.WebControls;

Namespace Testapi

{

public partial class WebForm1:System.Web.UI.Page

{

protected void Page_Load (object sender, EventArgs e)

{

string[] array = Request.Form.AllKeys;

if (array. Length > 0)

{

Httppostedfile postfilebase;

if (Request.Files.Count > 0)

{

String Dirpath = this. Server.MapPath ("~/1");

If the folder does not exist, create

Filehandle.createdir (Dirpath);

Result. FileCount = Request.Files.Count;

Result. FilePath = new String[result. FileCount];

String Filenamepath = String. Empty;

for (int i = 0; i < Request.Files.Count; i++)

{

Postfilebase = Request.files[request.files.allkeys[i]];

if (postfilebase! = null)

{

if (PostFileBase.ContentType.StartsWith ("image"))

{

Postfilebase.saveas (String. Format ("{0}\\{1}.png", Dirpath, DateTime.Now.Ticks.ToString ()));

}

else if (PostFileBase.ContentType.StartsWith ("text"))

{

Postfilebase.saveas (String. Format ("{0}\\{1}.txt", Dirpath, DateTime.Now.Ticks.ToString ()));

}

Image upload function demo, using HTML5 's Clipboard API interface

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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