Validate the contract class or SSRS parameter from code level before printing

Just add below code in contract class so that mandatory  fields like date fields can be validated by throwing the warning.

public boolean validate()
{
    boolean             isValid = true;

    if (!fromDate)
    {
        isValid = checkFailed("From Date should be entered");
    }

    if (!toDate)
    {
        isValid = checkFailed("To Date should be entered");
    }

    if (isValid && (fromDate > toDate))
    {
        isValid = checkFailed(strfmt("From Date should be less than or equal to To Date", date2StrUsr(fromDate, DateFlags::FormatAll), date2StrUsr(toDate, DateFlags::FormatAll)));
    }

    return isValid;
}

Tablix headers not repeating in SSRS

Hi,
To repeat tablix header through out the ssrs (all pages)
1. In the grouping pane, make sure to turn on advanced mode (click on the small black down arrow on the far right of the grouping pane)
2. Select the corresponding (Static) item in the row group hierarchy
3. In the properties grid, set RepeatOnNewPage to true
4. KeepwithGroup to After