nandlaldotsquares said:

i am unable to add Header Text in XamdayView

You can look at the feature browser for examples of that type of display. That screenshot shows a scenario where the CalendarGroups collection of the xamScheduleDataManager (or the CalendarGroupsOverride of a specific xamDayView instance) has 2 CalendarGroup instances where the Calendars collection of each contains 2 ResourceCalendars (usually initialized by setting the InitializeCalendarIds of the CalendarGroup). Each ResourceCalendar is represented as a tab item. CalendarGroups are discussed in the help here.

The caption of that tab item (the element is CalendarHeader) that is displayed contains a combination of the Resource's Name and/or the ResourceCalendar's Name. In 10.3, it only contains the ResourceCalendar's Name but in 11.1, the default header is similar to that of Outlook where it will contain the ResourceName if the calendar's OwningResource is the CurrentUser of the xamScheduleDataManager, the Name of the OwningResource if the calendar is the DefaultCalendar of its OwningResource, and otherwise is a concatenation of the OwningResource's Name and the calendar's Name. So essentially the caption that is displayed comes from the Name property of the Resource/ResourceCalendar that you are providing - i.e. from your data.

The easiest way to help find an answer to questions such as this is to get Snoop and look at the element tree to see where those elements are. In this case there are several ScheduleDateTimePresenter instances that are providing those visuals. These exist within the DayViewDayHeader element so if you do not want those in there then you would retemplate the DayViewDayHeader and remove or collapse those elements.

The best place to start with creating custom templates is to take a copy of the existing one from the DefaultStyles directory (e.g. C:\Program Files\Infragistics\NetAdvantage 2011.1\WPF\DefaultStyles). In this case that template looks like the following:

    <Style TargetType="igSchedulePrim:DayViewDayHeader">
     <Setter Property="Template">
      <Setter.Value>
       <ControlTemplate TargetType="igSchedulePrim:DayViewDayHeader">
        <Border BorderBrush="{TemplateBinding ComputedBorderBrush}"
          BorderThickness="{TemplateBinding ComputedBorderThickness}"
          Background="{TemplateBinding ComputedBackground}"
          Padding="{TemplateBinding Padding}"
          igPrim:XamlHelper.SnapsToDevicePixels="True">
         <Grid igPrim:XamlHelper.SnapsToDevicePixels="{TemplateBinding igPrim:XamlHelper.SnapsToDevicePixels}" >
          <Grid.ColumnDefinitions>
           <ColumnDefinition Width="Auto"/>
           <ColumnDefinition Width="*"/>
          </Grid.ColumnDefinitions>
          <igSchedulePrim:ScheduleDateTimePresenter HorizontalAlignment="Left" FormatType="DayOfMonthNumber" DateTime="{Binding DateTime, RelativeSource={RelativeSource TemplatedParent}}" FontWeight="Bold" Foreground="{TemplateBinding ComputedForeground}"/>
          <igPrim:BestFitPanel x:Name="FullDayName" Grid.Column="1" HorizontalAlignment="Center" Margin="0,0,7,0">
           <igSchedulePrim:ScheduleDateTimePresenter FormatType="DayOfWeek" DateTime="{Binding DateTime, RelativeSource={RelativeSource TemplatedParent}}" Foreground="{TemplateBinding ComputedForeground}"/>
           <igSchedulePrim:ScheduleDateTimePresenter FormatType="ShortDayOfWeek" DateTime="{Binding DateTime, RelativeSource={RelativeSource TemplatedParent}}" Foreground="{TemplateBinding ComputedForeground}"/>
           <igSchedulePrim:ScheduleDateTimePresenter FormatType="ShortestDayOfWeek" DateTime="{Binding DateTime, RelativeSource={RelativeSource TemplatedParent}}" Foreground="{TemplateBinding ComputedForeground}"/>
          </igPrim:BestFitPanel>
         </Grid>
        </Border>
       </ControlTemplate>
      </Setter.Value>
     </Setter>
    </Style>   

And that requires some namespace mappings (also taken from the same xaml file where the template was taken):

       xmlns:ig="http://schemas.infragistics.com/xaml"
       xmlns:igPrim="http://schemas.infragistics.com/xaml/primitives"
       xmlns:igSchedulePrim="http://schemas.infragistics.com/xaml/primitives"

So you could remove the Grid within the Border. Note since there would be no content to provide any height you may want to add a setter for the MinHeight or put something (like a textblock) within the template in place of the grid.

There isn't a property since that is something that might be different per locale and instead is something that is defined by resource strings. You can see a list of the schedule related resource strings here. This other help topic discusses how one overrides/defines custom resource strings. In the case of xamSchedule the RegisterResources method is defined on the ScheduleControlBase class.