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Display a tooltip over a button using Windows Forms
... in this.Controls)
{
if (ctrl is Button && ctrl.Tag is string)
{
ctrl.MouseHover += new EventHandler(delegate(Object o, EventArgs a)
{
var btn = (Control)o;
ToolTip1.SetToolTip(btn, btn.Tag.ToString());
}...
Upgrade python in a virtualenv
...you will need to see your virtualenv version).
If your virtualenv is installed with the same python version of the old one and upgrading your virtualenv package is not an option, you may want to read this in order to install a virtualenv with the python version you want.
EDIT
I've tested this ap...
How to create json by JavaScript for loop?
...l's code but swap out status.options[i].text for status.id.
If you want a string that contains a JSON representation of the selected object, use this instead:
var jsonStr = "";
var status = document.getElementsByName("status")[0];
for (i = 0, i < status.options.length, ++i) {
if (opt...
How do I set the version information for an existing .exe, .dll?
...IONINFO
FILEVERSION 1,0,0,0
PRODUCTVERSION 1,0,0,0
{
BLOCK "StringFileInfo"
{
BLOCK "040904b0"
{
VALUE "CompanyName", "ACME Inc.\0"
VALUE "FileDescription", "MyProg\0"
VALUE "FileVersion", "1.0.0.0\0"
...
Java regular expression OR operator
...
You can just use the pipe on its own:
"string1|string2"
for example:
String s = "string1, string2, string3";
System.out.println(s.replaceAll("string1|string2", "blah"));
Output:
blah, blah, string3
The main reason to use parentheses is to limit the scope o...
How to create a string with format?
I need to create a string with format which can convert int, long, double etc. types into string. Using Obj-C, I can do it via below way.
...
How to check if an NSDictionary or NSMutableDictionary contains a key?
...use valueForKey for a JSON dictionary. That's because JSON can contain any string as a key. For example, if it contains "@count" as a key, then objectForKey:@"@count" will give the correct value, but valueForKey:@"@count" will give the number of key/value pairs.
– gnasher729
...
Implementing MVC with Windows Forms
... code (a simple pseudocode, just for illustration):
interface IView
{
string Username { get; set; }
string Password { get; set; }
event EventHandler LogOnButtonClicked;
void InformUserLogOnFailed();
void MoveToMainScreen();
}
class Presenter
{
public Presenter(IView view)...
linq query to return distinct field values from a list of objects
...nd GetHashCode methods.
Product class:
public class Product
{
public string ProductName { get; set; }
public int Id { get; set; }
public override bool Equals(object obj)
{
if (!(obj is Product))
{
return false;
}
var other = (Product)o...
What is the use of ObservableCollection in .net?
...ObservableCollections
class Handler
{
private ObservableCollection<string> collection;
public Handler()
{
collection = new ObservableCollection<string>();
collection.CollectionChanged += HandleChange;
}
private void HandleChange(object sender, Notif...