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“Automatic” vs “Automatic (Delayed start)”
...
In short, services set to Automatic will start during the boot process, while services set to start as Delayed will start shortly after boot.
Starting your service Delayed improves the boot performance of your server and has security benefits ...
A field initializer cannot reference the nonstatic field, method, or property
...ivate dynamic defaultReminder = TimeSpan.FromMinutes(15);
Alternatively, set up the value in the constructor:
private dynamic defaultReminder;
public Reminders()
{
defaultReminder = reminder.TimeSpanText[TimeSpan.FromMinutes(15)];
}
There are more details about this compiler error on MSDN...
Datatable vs Dataset
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It really depends on the sort of data you're bringing back. Since a DataSet is (in effect) just a collection of DataTable objects, you can return multiple distinct sets of data into a single, and therefore more manageable, object.
Performance-wise, you're more likely to get inefficiency from u...
Why does my JavaScript code receive a “No 'Access-Control-Allow-Origin' header is present on the req
...; ?>
If you are using Node-red you have to allow CORS in the node-red/settings.js file by un-commenting the following lines:
// The following property can be used to configure cross-origin resource sharing
// in the HTTP nodes.
// See https://github.com/troygoode/node-cors#configuration-option...
Window Features - 更多技术 - 清泛网 - 专注C/C++及内核技术
...on can change the parent window of an existing child window by calling the SetParent function. In this case, the system removes the child window from the client area of the old parent window and moves it to the client area of the new parent window. If SetParent specifies a NULL handle, the desktop w...
What is App.config in C#.NET? How to use it?
...of information.
Overview (MSDN)
Connection String Configuration (MSDN)
Settings can be configured using built-in configuration sections such as connectionStrings or appSettings. You can add your own custom configuration sections; this is an advanced topic, but very powerful for building strongly...
Listview Scroll to the end of the list after updating the list
...ata has changed, you can manually tell the list to scroll to the bottom by setting the list selection to the last row. Something like:
private void scrollMyListViewToBottom() {
myListView.post(new Runnable() {
@Override
public void run() {
// Select the last row so ...
How to get the host name of the current machine as defined in the Ansible hosts file?
I'm setting up an Ansible playbook to set up a couple servers. There are a couple of tasks that I only want to run if the current host is my local dev host, named "local" in my hosts file. How can I do this? I can't find it anywhere in the documentation.
...
How to get the max of two values in MySQL?
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To get the maximum value of a column across a set of rows:
SELECT MAX(column1) FROM table; -- expect one result
To get the maximum value of a set of columns, literals, or variables for each row:
SELECT GREATEST(column1, 1, 0, @val) FROM table; -- expect many results
...
What is a Proxy in Doctrine 2?
... protected $firstname;
@Column protected $lastname;
// bunch of setters/getters here
}
DQL query:
SELECT u.id, u.username FROM Entity\User u WHERE u.id = :id
As you can see this query doesn't return firstname and lastname properties, therefore you cannot create User object. Creation o...