C# - Download An Image File Into An Image Control Using Ftp?
Dec 5, 2010how one would download an image file into an image control in asp.net using ftp?
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Generic Handler:
Code:
<%@ WebHandler Language="C#" Class="ShowImage" %>
using System;
using System.Configuration;
using System.Drawing;
using System.Drawing.Imaging;
[Code] ....
Asp.Net Code for the Image control:
HTML Code:
<asp:Image ID="Image1" runat="server" ImageUrl='<%# "ShowImage.ashx?ID=" + Eval("ID") %>' Height="128px" />
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[Code]....
in C# code I wrote these:
[Code]....
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if (FileUpload1.HasFile){string FileName = System.IO.Path.GetFileName(FileUpload1.PostedFile.FileName);
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Page
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<h2>Upload-Pictures</h2>
<div id="file-uploader">
<noscript>
<p>Please enable JavaScript to use file uploader.</p>
</noscript>
</div>
<script src="/Scripts/fileuploader.js" type="text/javascript"></script>
<script type="text/javascript">
function createUploader() {
var uploader = new qq.FileUploader({
element: document.getElementById('file-uploader'),
action: '/Admin/FileUpload/' + <%= Model.PropertyId %>,
debug: true
});
}
window.onload = createUploader;
</script>
</asp:Content>
Controller
[AcceptVerbs(HttpVerbs.Post)]
public JsonResult FileUpload(int id)
{
try
{
byte[] newImageByteArray = GetByteArrayForResizedImage(350, Request.InputStream);
byte[] thumbnailByteArray = GetByteArrayForResizedImage(150, Request.InputStream);
//Add to DB
}
catch (Exception ex)
{
// This is where the exception is caught
return Json(new { success = false, message = ex.Message }, "application/json");
}
return Json(new { success = true }, "application/json");
}
private static byte[] GetByteArrayForResizedImage(int imageSize, Stream inputStream)
{
byte[] imageByteArray;
// For some reason in IE the inputStream here is causing it to crash
using (Image imgInput = Image.FromStream(inputStream))
{
//Image processing
}
return imageByteArray;
}
fileuploader.js - qq.FileUploader
/**
* Class that creates upload widget with drag-and-drop and file list
* @inherits qq.FileUploaderBasic
*/
qq.FileUploader = function(o){
// call parent constructor
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element: null,
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listElement: null,
template: '<div class="qq-uploader">' +
'<div class="qq-upload-drop-area"><span>Drop files here to upload</span></div>' +
'<div class="qq-upload-button">Upload a file</div>' +
'<ul class="qq-upload-list"></ul>' +
'</div>',
// template for one item in file list
fileTemplate: '<li>' +
'<span class="qq-upload-file"></span>' +
'<span class="qq-upload-spinner"></span>' +
'<span class="qq-upload-size"></span>' +
'<a class="qq-upload-cancel" href="#">Cancel</a>' +
'<span class="qq-upload-failed-text">Failed</span>' +
'</li>',
classes: {
// used to get elements from templates
button: 'qq-upload-button',
drop: 'qq-upload-drop-area',
dropActive: 'qq-upload-drop-area-active',
list: 'qq-upload-list',
file: 'qq-upload-file',
spinner: 'qq-upload-spinner',
size: 'qq-upload-size',
cancel: 'qq-upload-cancel',
// added to list item when upload completes
// used in css to hide progress spinner
success: 'qq-upload-success',
fail: 'qq-upload-fail'
}
});
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qq.extend(this._options, o);
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this._element.innerHTML = this._options.template;
this._listElement = this._options.listElement || this._find(this._element, 'list');
this._classes = this._options.classes;
this._button = this._createUploadButton(this._find(this._element, 'button'));
this._bindCancelEvent();
this._setupDragDrop();
};
fileuploader.js - qq.FileUploaderBasic
/**
* Creates upload button, validates upload, but doesn't create file list or dd.
*/
qq.FileUploaderBasic = function(o){
this._options = {
// set to true to see the server response
debug: false,
action: '/server/upload',
params: {},
button: null,
multiple: true,
maxConnections: 3,
// validation
allowedExtensions: [],
sizeLimit: 0,
minSizeLimit: 0,
// events
// return false to cancel submit
onSubmit: function(id, fileName){},
onProgress: function(id, fileName, loaded, total){},
onComplete: function(id, fileName, responseJSON){},
onCancel: function(id, fileName){},
// messages
messages: {
typeError: "{file} has invalid extension. Only {extensions} are allowed.",
sizeError: "{file} is too large, maximum file size is {sizeLimit}.",
minSizeError: "{file} is too small, minimum file size is {minSizeLimit}.",
emptyError: "{file} is empty, please select files again without it.",
onLeave: "The files are being uploaded, if you leave now the upload will be cancelled."
},
showMessage: function(message){
alert(message);
}
};
qq.extend(this._options, o);
// number of files being uploaded
this._filesInProgress = 0;
this._handler = this._createUploadHandler();
if (this._options.button){
this._button = this._createUploadButton(this._options.button);
}
this._preventLeaveInProgress();
};
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[Code]....
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[code]....
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