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entity object cannot be referenced by multiple instances of IEntityChangeTracker. while adding relat
...rying to save Employee details, which has references with City. But everytime I try to save my contact, which is validated I get the exception "ADO.Net Entity Framework An entity object cannot be referenced by multiple instances of IEntityChangeTracker"
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How to initialize a private static const map in C++?
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#include <map>
using namespace std;
struct A{
static map<int,int> create_map()
{
map<int,int> m;
m[1] = 2;
m[3] = 4;
m[5] = 6;
return m;
}
static const map<in...
Color different parts of a RichTextBox string
...
Here is an extension method that overloads the AppendText method with a color parameter:
public static class RichTextBoxExtensions
{
public static void AppendText(this RichTextBox box, string text, Color color)
{
box.SelectionSta...
How to debug Angular JavaScript Code
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1. Chrome
For debugging AngularJS in Chrome you can use AngularJS Batarang.
(From recent reviews on the plugin it seems like AngularJS Batarang is no longer being maintained. Tested in various versions of Chrome and it does not work...
URL Fragment and 302 redirects
It's well known that the URL fragment (the part after the # ) is not sent to the server.
4 Answers
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Best way to check if object exists in Entity Framework?
...ists in the database from a performance point of view? I'm using Entity Framework 1.0 (ASP.NET 3.5 SP1).
8 Answers
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How to make JavaScript execute after page load?
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These solutions will work:
<body onload="script();">
or
document.onload = function ...
or even
window.onload = function ...
Note that the last option is a better way to go since it is unobstrusive and is considered more standard.
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How can I convert uppercase letters to lowercase in Notepad++
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This doesn't work for me (Notepad++ v6.2.3 on Windows 7). Only the Ctrl+Shift+U/Ctrl+U or SQL_Novice's answer work.
– CarLaTeX
Jan 4 '19 at 15:07
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MVC pattern on Android
Is it possible to implement the model–view–controller pattern in Java for Android?
21 Answers
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How does the Comma Operator work
...would be equal to b.
The comma operator has a lower precedence than assignment.
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