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What does “Object reference not set to an instance of an object” mean? [duplicate]
...
The following code is a simple way of reproducing this:
static void Main(string[] args)
{
var exampleClass = new ExampleClass();
var returnedClass = exampleClass.ExampleMethod();
returnedClass.AnotherExampleMethod(); //NullReferenceException here.
}
class ExampleClass
{
public Ret...
How can I custom-format the Autocomplete plug-in results?
...e: http://output.jsbin.com/qixaxinuhe
To preserve the case of the match strings, as opposed to using the case of the typed characters, use this line:
var t = item.label.replace(re,"<span style='font-weight:bold;color:Blue;'>" +
"$&" +
"</span>");
In other...
Saving and Reading Bitmaps/Images from Internal memory in Android
...
Use the below code to save the image to internal directory.
private String saveToInternalStorage(Bitmap bitmapImage){
ContextWrapper cw = new ContextWrapper(getApplicationContext());
// path to /data/data/yourapp/app_data/imageDir
File directory = cw.getDir("imageDir"...
Check whether a variable is a string in Ruby
...nd_of? will return true for instances from derived classes.
class X < String
end
foo = X.new
foo.is_a? String # true
foo.kind_of? String # true
foo.instance_of? String # false
foo.instance_of? X # true
...
Using PropertyInfo to find out the property type
...e().GetProperties())
{
if (propertyInfo.PropertyType == typeof(string))
{
string value = propertyInfo.GetValue(data, null);
if value is not OK
{
return false;
}
}
}
return true;
}
...
Server.MapPath(“.”), Server.MapPath(“~”), Server.MapPath(@“\”), ...
...ry of the request being processed.
Note: in C#, @ is the verbatim literal string operator meaning that the string should be used "as is" and not be processed for escape sequences.
Footnotes
Server.MapPath(null) and Server.MapPath("") will produce this effect too.
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Is it possible to clone html element objects in JavaScript / JQuery?
...
I don't think that will help as your attribute value is a string that won't change.
– Jamie R Rytlewski
Aug 19 '11 at 20:18
add a comment
|...
SVG get text element width
...lue"; // for convenience when visible
div.innerHTML = "YOUR STRING";
document.body.appendChild(div);
var offsetWidth = div.offsetWidth;
var clientWidth = div.clientWidth;
document.body.removeChild(div);
...
How can I generate random alphanumeric strings?
How can I generate a random 8 character alphanumeric string in C#?
33 Answers
33
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How do you list the primary key of a SQL Server table?
... and TableName.
IMHO, this solution is very generic and does not use any string literals, so it will run on any machine.
select
s.name as SchemaName,
t.name as TableName,
tc.name as ColumnName,
ic.key_ordinal as KeyOrderNr
from
sys.schemas s
inner join sys.tables t on...