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Unable to update the EntitySet - because it has a DefiningQuery and no element exis
I am using Entity Framework 1 with .net 3.5.
21 Answers
21
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Why are C# 4 optional parameters defined on interface not enforced on implementing class?
...th=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4...
Why are Where and Select outperforming just Select?
...tem;
}
return sum;
}
In C#, foreach is just syntactic sugar for .Net's version of an iterator, IEnumerator<T> (not to be confused with IEnumerable<T>). So the above code is actually translated to this:
public static int Sum(this IEnumerable<int> source)
{
int sum = ...
Preferred Java way to ping an HTTP URL for availability
...URLConnection connection = null;
try {
URL u = new URL("http://www.google.com/");
connection = (HttpURLConnection) u.openConnection();
connection.setRequestMethod("HEAD");
int code = connection.getResponseCode();
System.out.println("" + code);
// Y...
How do I make a placeholder for a 'select' box?
...aceholder is visible in dropdown, but it is not selectable)
Microsoft Internet Explorer - v.11 (Placeholder is visible in dropdown but is not selectable)
Project Spartan - v.15.10130 (the placeholder is visible in dropdown, but it is not selectable)
Update (October 2015):
I removed the style="dis...
Sanitizing strings to make them URL and filename safe?
...ncodeForXPath (string $input)
https://github.com/OWASP/PHP-ESAPI
https://www.owasp.org/index.php/Category:OWASP_Enterprise_Security_API
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Custom Compiler Warnings
When using the ObsoleteAtribute in .Net it gives you compiler warnings telling you that the object/method/property is obsolete and somthing else should be used. I'm currently working on a project that requires a lot of refactoring an ex-employees code. I want to write a custom attribute that I can u...
What is the difference between Builder Design pattern and Factory Design pattern?
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@AdrianGrigore what if mix both of them??aso.net mvc have ControllerBuilder that have set and get method for ControllerFactory class
– AminM
Mar 30 at 17:44
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How do you add a timer to a C# console application
...re is also a System.Timers class added early on in the development of the .NET framework. However it is generally recommended to use the System.Threading.Timer class instead as this is just a wrapper around System.Threading.Timer anyway.
It is also recommended to always use a static (shared in VB.N...
Set cursor position on contentEditable
...d 7, Chrome 2, Firefox 2, 3 and 3.5, and Safari 4, all on Windows.
http://www.timdown.co.uk/code/selections/
Note that selections may be made backwards in browsers so that the focus node is at the start of the selection and hitting the right or left cursor key will move the caret to a position rel...