original content.ortaIn this article, we will show you how to extend an existing upload form in ASP.NET with the option to download an image from a specifi URL.
Uploading an image that the user searches for on their local drive and inserts into a form field is a well-known technique and many applications today offer it. In the article How to download an image from a specifi URL, we have an example of how to download image data. Here we will show how to improve the form, which classically contains a field for listing a file for upload, so that it is possible to enter a URL as well. And all this while maintaining as much accessibility as possible.
We assume that we want to expand some older
application/service, so we probably already have a form with a previously widely us upload box in our application. We will also complete the form with a preview of the image before sending, so we will have to contend with the fact that, for security reasons, the possibilities of working with the content of the file selection field are limit. The image preview and correct work with individual fields will be ensur by a client script – even so, the thailand phone number data form will remain functional even without JavaScript and therefore accessible and usable. However, there are differences in the implementation of the file selection input field in different browsers, so in some browsers it will not even be possible to preview the local file.
An example of an extend form
The form will therefore contain a classic text field for entering a URL, a field for selecting a local file, a preview image and a send button, as it’s all for nothing if the 301s well as the often damn Reset button. I decid to add the reset button so that it would be possible to clearly cancel the selection of the image, even in a browser that does not allow the field to be delet with the keyboard (e.g. FireFox).
For the sake of simplicity, I leave out the parts cg leads relat to styles (CSS), the download sample is styl mostly with inline stylesheet for demonstrative reasons, I also typ the assignment of event handlers directly into.