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Value cannot be null. Parameter name: source
... what you'd expect. This error message often crops up when your connection string is wrong.
At a guess, you'll need something like this:
<connectionStrings>
<add name="hublisherEntities" connectionString="Data Source=localhost;Initial Catalog=hublisher;Integrated Security=True;" provi...
C# getting its own class name
... class called MyProgram , is there a way of retrieving " MyProgram " as a string?
9 Answers
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How do I get the parent directory in Python?
...y have to exist. There are a lot of pathname methods that does nothing but string manipulation. To verify if the pathname actually exist requires a disk access. Depends on the application this may or may not be desirable.
– Wai Yip Tung
May 18 '10 at 19:45
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Java 8: Lambda-Streams, Filter by Method with Exception
... throw runtime(e);
}
}
public static void main(String[] args) {
class Account{
String name;
Account(String name) { this.name = name;}
public boolean isActive() throws IOException {
return name.startsWith("a"...
How to check if a URL is valid
How can I check if a string is a valid URL?
9 Answers
9
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How to escape a JSON string to have it in a URL?
...
encodeURIComponent(JSON.stringify(object_to_be_serialised))
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How do I get hour and minutes from NSDate?
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Use an NSDateFormatter to convert string1 into an NSDate, then get the required NSDateComponents:
Obj-C:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"<your date format goes here"];
NSDate *date = [dateFo...
Fragment MyFragment not attached to Activity
...d onPostExecute(Void result){
if(isAdded()){
getResources().getString(R.string.app_name);
}
}
To avoid onPostExecute from being called when the Fragment is not attached to the Activity is to cancel the AsyncTask when pausing or stopping the Fragment. Then isAdded() would not be nec...
Checkbox for nullable boolean
...ble fashion (display: inline-block; width:100px;)
In the model (I'm using string, string for the dictionary definition as a pedagogical example. You can use bool?, string)
public IEnumerable<SelectListItem> Sexsli { get; set; }
SexDict = new Dictionary<string, string>()
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What does the @ symbol before a variable name mean in C#? [duplicate]
I understand that the @ symbol can be used before a string literal to change how the compiler parses the string. But what does it mean when a variable name is prefixed with the @ symbol?
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