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Binding a Button's visibility to a bool value in ViewModel
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Assuming AdvancedFormat is a bool, you need to declare and use a BooleanToVisibilityConverter:
<!-- In your resources section of the XAML -->
<BooleanToVisibilityConverter x:Key="BoolToVis" />
<!-- In your Button declaration -->
<Button
Height="50" Width="...
How to insert newline in string literal?
...line" + Environment.NewLine + "second line";
String interpolation (in C#6 and above):
string x = $"first line{Environment.NewLine}second line";
You could also use \n everywhere, and replace:
string x = "first line\nsecond line\nthird line".Replace("\n",
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How to alter a column and change the default value?
I got the following error while trying to alter a column's data type and setting a new default value:
7 Answers
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What is the difference between indexOf() and search()?
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indexOf() and search()
common in both
i) return the first occurrence of searched value
ii) return -1 if no match found
let str='Book is booked for delivery'
str.indexOf('b') // returns position 8
str.search('b') // returns p...
Does Git publicly expose my e-mail address?
The guides I've read so far on Git say that I should go into the config and specify my name and my e-mail address. They don't elaborate; they just say to do it.
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Converting string into datetime
...e.strptime is the main routine for parsing strings into datetimes. It can handle all sorts of formats, with the format determined by a format string you give it:
from datetime import datetime
datetime_object = datetime.strptime('Jun 1 2005 1:33PM', '%b %d %Y %I:%M%p')
The resulting datetime obj...
How to Resize a Bitmap in Android?
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suppose you have large resolution image say 1200x1200 and when you display this, it will be full in the imageview. If i scale it down say 75% and the screen is so that it displays scaled image also fully in imageview, what should be done for such screens?
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Rails Observer Alternatives for 4.0
...Other than using the extracted gem.) While Observers were certainly abused and could easily become unwieldily at times, there were many use-cases outside of just cache-clearing where they were beneficial.
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How do I check if a string contains another string in Swift?
...String is a collection of Character values, it wasn't like this in Swift 2 and 3, so you can use this more concise code1:
let string = "hello Swift"
if string.contains("Swift") {
print("exists")
}
Swift 3.0+
var string = "hello Swift"
if string.range(of:"Swift") != nil {
print("exists"...
How to resolve “must be an instance of string, string given” prior to PHP 7?
...Prior to PHP 7 type hinting can only be used to force the types of objects and arrays. Scalar types are not type-hintable. In this case an object of the class string is expected, but you're giving it a (scalar) string. The error message may be funny, but it's not supposed to work to begin with. Give...