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How to save an HTML5 Canvas as an image on a server?
... a POST method.
2) When the user is done drawing, he can click the "Save" button.
3) When the button is clicked I take the image data and put it into a hidden field. After that I submit the form.
document.getElementById('my_hidden').value = canvas.toDataURL('image/png');
document.forms["form1"].s...
How to make input type= file Should accept only pdf and xls
...t the file upload control to Limit the types of files user can upload on a button click then this is the way..
<script type="text/JavaScript">
<!-- Begin
function TestFileType( fileName, fileTypes ) {
if (!fileName) return;
dots = fileName.split(".")
//get the part AFTER the LAST period.
...
How to disable scrolling temporarily?
... do it by canceling these interaction events:
Mouse & Touch scroll and Buttons associated with scrolling.
[Working demo]
// left: 37, up: 38, right: 39, down: 40,
// spacebar: 32, pageup: 33, pagedown: 34, end: 35, home: 36
var keys = {37: 1, 38: 1, 39: 1, 40: 1};
function preventDefault(e) {...
How can I change my default database in SQL Server without using MS SQL Server Management Studio?
...ault. I can connect to SQL Server Management Studio by using the 'options' button in the connection dialog and selecting 'master' as the database to connect to. However, whenever I try to do anything in object explorer, it tries to connect using my default database and fails.
...
Android: why is there no maxHeight for a View?
...
won't work if you have buttons below it. it will push the buttons off screen
– Li Tian Gong
Jan 4 '15 at 23:32
...
How to programmatically empty browser cache?
...te the 'meta tag' that references the cache status with an event handler / button, and then refresh, easy,
$('.button').click(function() {
$.ajax({
url: "",
context: document.body,
success: function(s,x){
$('html[manifest=saveappoffline.appcache]').attr('co...
chrome undo the action of “prevent this page from creating additional dialogs”
...ick the refresh icon it duplicates the tab. Middle-clicking back / forward buttons open their pages in new tabs too. Pretty handy.
– RobM
Jun 9 '16 at 9:42
...
How do I exit a WPF application programmatically?
...n your main window. This is the same as pressing Alt + F4 or the close [x] button on the window. This will cause all other owned windows to close and will end up calling Application.Current.Shutdown(); so long as the close action wasn't cancelled. Please see the MSDN documentation on Closing a Windo...
Copy a table from one database to another in Postgres
... click "Use Column Inserts" and "User Insert Commands".
Click the "Backup" button. This outputs to a .backup file
Open this new file using notepad. You will see the insert scripts needed for the table/data. Copy and paste these into the new database sql page in pgAdmin. Run as pgScript - Query-...
Is a url query parameter valid if it has no value?
...od="get">
<input type="text" name="isindex" value="bar"/>
<button type="submit">Submit</button>
</form>
generates an URL of type:
?bar
Standard: https://www.w3.org/TR/html5/forms.html#naming-form-controls:-the-name-attribute
isindex is however deprecated as menti...