|String||A String expression that indicates the alternate labels + an expression that can be used to show a specific HTML label on certain conditions.|
The following screen shot shows the short header's schedule view if using "<sha><%mmmm%> <%d%><|><%m3%> <%d%><|><%d%><=>((( day(value) = 1) or ( month(value+1) != month(value))) ? -1 : 2)"
The following screen shot shows the short header's schedule view if using ""<%mmmm%> <%d%><|><%m3%> <%d%><|><%d%><=>((( day(value) = 1) or ( month(value+1) != month(value))) ? -1 : 2)" " ( default )
The first part of the HeaderDayShortLabel's format is similar with the HeaderDayLongLabel's format, and it indicates a list of alternate labels separated by the <|>, while the last part of the format indicates an expression that determines whether a specified HTML label is being displayed on a certain condition.
In conclusion, the format of the HeaderDayShortLabel property is: "ALT1[<|>ALT2<|>...][<=>EXPR]"
For instance, HeaderDayLongLabel could be
When the user resizes the schedule view, the control searches for the best fit, and the date header displays the proper HTML label, based on its width, so no ... (three dots) is shown in the labels as much as possible.
The HeaderDayLongLabel property supports the following built-in tags:
The following tags are displayed based on the user's Regional and Language Options:
The HeaderDayLongLabel property supports the following built-in HTML tags:
Also, newer HTML format supports decorative text like follows:
or "<font ;31><sha 404040;5;0><fgcolor=FFFFFF>outline anti-aliasing</fgcolor></sha></font>" gets:
The supported binary arithmetic operators are:
The supported unary boolean operators are:
The supported binary boolean operators are:
The supported binary boolean operators, all these with the same priority 0, are :
The supported ternary operators, all these with the same priority 0, are :
"expression ? true_part : false_part"
, while it executes and returns the true_part if the expression is true, else it executes and returns the false_part. For instance, the "%0 = 1 ? 'One' : (%0 = 2 ? 'Two' : 'not found')" returns 'One' if the value is 1, 'Two' if the value is 2, and 'not found' for any other value. A n-ary equivalent operation is the case() statement, which is available in newer versions of the component.
The supported n-ary operators are (with priority 5):
"expression array (c1,c2,c3,...cn)"
, where the c1, c2, ... are constant elements. The constant elements could be numeric, date or string expressions. For instance the "month(value)-1 array ('J','F','M','A','M','Jun','J','A','S','O','N','D')" is equivalent with "month(value)-1 case (default:''; 0:'J';1:'F';2:'M';3:'A';4:'M';5:'Jun';6:'J';7:'A';8:'S';9:'O';10:'N';11:'D')".
"expression in (c1,c2,c3,...cn)"
, where the c1, c2, ... are constant elements. The constant elements could be numeric, date or string expressions. For instance the "value in (11,22,33,44,13)" is equivalent with "(expression = 11) or (expression = 22) or (expression = 33) or (expression = 44) or (expression = 13)". The in operator is not a time consuming as the equivalent or version is, so when you have large number of constant elements it is recommended using the in operator. Shortly, if the collection of elements has 1000 elements the in operator could take up to 8 operations in order to find if an element fits the set, else if the or statement is used, it could take up to 1000 operations to check, so by far, the in operator could save time on finding elements within a collection.
"expression switch (default,c1,c2,c3,...,cn)"
, where the c1, c2, ... are constant elements, and the default is a constant element being returned when the element is not found in the collection. The constant elements could be numeric, date or string expressions. The equivalent syntax is "%0 = c 1 ? c 1 : ( %0 = c 2 ? c 2 : ( ... ? . : default) )". The switch operator is very similar with the in operator excepts that the first element in the switch is always returned by the statement if the element is not found, while the returned value is the value itself instead -1. For instance, the "%0 switch ('not found',1,4,7,9,11)" gets 1, 4, 7, 9 or 11, or 'not found' for any other value. As the in operator the switch operator uses binary searches for fitting the element, so it is quicker that iif (immediate if operator) alterative.
"expression case ([default : default_expression ; ] c1 : expression1 ; c2 : expression2 ; c3 : expression3 ;....)"
If the default part is missing, the case() operator returns the value of the expression if it is not found in the collection of cases ( c1, c2, ...). For instance, if the value of expression is not any of c1, c2, .... the default_expression is executed and returned. If the value of the expression is c1, then the case() operator executes and returns the expression1. The default, c1, c2, c3, ... must be constant elements as numbers, dates or strings. For instance, the "date(shortdate(value)) case (default:0 ; #1/1/2002#:1 ; #2/1/2002#:1; #4/1/2002#:1; #5/1/2002#:1)" indicates that only #1/1/2002#, #2/1/2002#, #4/1/2002# and #5/1/2002# dates returns 1, since the others returns 0. For instance the following sample specifies the hour being non-working for specified dates: "date(shortdate(value)) case(default:0;#4/1/2009# : hour(value) >= 6 and hour(value) <= 12 ; #4/5/2009# : hour(value) >= 7 and hour(value) <= 10 or hour(value) in(15,16,18,22); #5/1/2009# : hour(value) <= 8)" statement indicates the working hours for dates as follows:
- #4/1/2009#, from hours 06:00 AM to 12:00 PM
- #4/5/2009#, from hours 07:00 AM to 10:00 AM and hours 03:00PM, 04:00PM, 06:00PM and 10:00PM
- #5/1/2009#, from hours 12:00 AM to 08:00 AM
The in, switch and case() use binary search to look for elements so they are faster then using iif and or expressions.
Obviously, the priority of the operations inside the expression is determined by ( ) parenthesis and the priority for each operator.
The supported conversion unary operators are:
Here's few predefined types:
Other known operators for numbers are:
The ' flags' for format operator is a list of values separated by | character such as 'NumDigits|DecimalSep|Grouping|ThousandSep|NegativeOrder|LeadingZero' with the following meanings:
Other known operators for strings are:
Other known operators for dates are: