In this use case scenario, you want to display the rolled up data from multiple Tasks lists on your SharePoint site in a Calendar view. This article will walk you through the process of configuring the Calendar Plus Web Part to recognize and display the data from the Bamboo List Rollup Web Part.
Notes: This article shows the functionalities of the Calendar Plus version 2.0 and above. This article assumes that you are using the Bamboo List Rollup Web Part to aggregate data from multiple lists in different sites. For additional information on the List Rollup Web Part, please refer to List Rollup Web Part on our web site.
Step 1:
Install and configure the List Rollup Web Part to aggregate your Tasks lists. Refer to this Combine Multiple Tasks Lists using the List Rollup Web Part. A Step By Step Guide article for additional detail. The "rolled-up" view of multiple tasks lists from different departments might look similar to:

Step 2:
Install the Bamboo Calendar Plus Web Part according to instructions in the Application Notes. Once the Web Part is installed, select Modify Shared Web Part from the menu accessed at the upper right corner of the Web Part. This menu is only accessible by users with authority to modify the page.

Step 3:
Select the display options for the Calendar Plus Web Part. These options allow you to select how the calendar will be presented to your end users.

Step 4:
Set up your List Rollup DataView as the data source:
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Select the DataView Web Part as your data source.
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Enter the URL of the Web Site where the DataView resides. The format of the URL is similar to <http://YourSite/SubSite/Rollup.aspx>. Make sure that your users have the correct permission to view the Rollup DataView, or they will not be able to view the data in the calendar.
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Click on Show DataView Web Parts.
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Select your rolled up DataView from the Select a list choices.
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Select a column to display on the Calendar, Title in this example.
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Select the information from the database columns that you want to display when the users mouse over an item. In this example, we will show the Title, Status, Priority, AssignedTo and Due Date columns.

Step 5:
Select color codes. In this example, we want to display different colors based on the Status field. Click the AutoSelect button to have the system automatically set the initial color codes, then you can change each individual setting if needed:
