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How can I save application settings in a Windows Forms application?
...gs. Right click on the project in Solution Explorer and choose Properties. Select the Settings tab and click on the hyperlink if settings doesn't exist.
Use the Settings tab to create application settings. Visual Studio creates the files Settings.settings and Settings.Designer.settings that contain...
What is the difference between 127.0.0.1 and localhost
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/etc/nsswitch.conf selects if hosts or DNS is used first for a host lookup, if nss is running.
– Mark Lakata
Feb 14 '19 at 20:16
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What reference do I need to use Microsoft.Office.Interop.Excel in .NET?
...You can install by either right clicking on References in your project and selecting Manage NuGet packages... and searching for one of the packages listed below, or install using the Package Manager Console:
PM> Install-Package Microsoft.Office.Interop.Excel
Microsoft.Office.Interop.Excel
Micro...
ASP.NET MVC: Custom Validation by DataAnnotation
...ntext validationContext)
{
var properties = this.PropertyNames.Select(validationContext.ObjectType.GetProperty);
var values = properties.Select(p => p.GetValue(validationContext.ObjectInstance, null)).OfType<string>();
var totalLength = values.Sum(x => x.Lengt...
How to clear an ImageView in Android?
... No, I don't want this. I want just to clear the contents. The user may select new image after.
– Pentium10
May 18 '10 at 17:08
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JavaScript: Upload file
... type="file" onchange="SavePhoto(this)" >
<br><br>
Before selecting the file open chrome console > network tab to see the request details.
<br><br>
<small>Because in this example we send request to https://stacksnippets.net/upload/image the response code will ...
How to prevent IFRAME from redirecting top-level window
... The user will not know why this confirmation appears, and will probably select a random response. I don't recommend using it. There are other solutions- the sandbox.
– oriadam
Dec 6 '15 at 23:10
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How to remove non-alphanumeric characters?
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[\W_]+
$string = preg_replace("/[\W_]+/u", '', $string);
It select all not A-Z, a-z, 0-9 and delete it.
See example here: https://regexr.com/3h1rj
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Remove duplicates from a List in C#
....GroupBy(s => s.City)
.Select(grp => grp.FirstOrDefault())
.OrderBy(s => s.City)
.ToList();
I have these fields in my list: Id, StoreName, Cit...
Can I have multiple primary keys in a single table?
...hese practices, but there is nothing in the relational model that requires selecting a primary key among the candidate keys.
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