Validating dates in excel

I'm using below code for checking text length in file .... LESS_THAN, "100", null); XSSFData Validation xssf Data Validation = (XSSFData Validation) dv Helper.create Validation(dv Constraint, address List); xssf Data Show Error Box(true); xssf Data Show Prompt Box(true); xssf Data Validation.create Prompt Box("","Comments are mandatory for BY or SS Reason Codes"); xssf Data Validation.create Error Box("ERROR", "Invalid Reason Code"); xssf Data Suppress Drop Down Arrow(false); Validation Data(xssf Data Validation); I tried like tis but it is not working ..... $B:$D,3, FALSE)", "=TODAY()", "dd/mm/yy"); Take a look at org.ss.usermodel.

It is a library to work with XLS/X files, not a spreadsheet application like Excel. In this case it must be "dd/MM/yyyy" and not "dd/mm/yyyy", in the second case it would return incorrect date, but this kind of things are up to the date format you'll use. Having date / time in the sheet is not enough if you can not make it look like the way you want. you may want to show date as "Monday - August 25, 2008". Just select the cell with date and hit ctrl 1 and in the "Number" tab select "Custom" as category and mention "dddd mmm dd, yyy" as format string. You can do this easily with conditional formatting as shown below: In order to do this, we can test whether a given a day is weekend or not in conditional formatting by as weekday() returns 6 and 7 for Saturday and Sunday.You can use similar logic to highlight after office hours (before 9AM or after 5PM) for time values.Step 1 of 4: Before you enter dates, set up your worksheet: • Start by selecting the range where dates will be entered.• Then, from your keyboard press to show the Data Validation dialog box.

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