SharePoint: Prevent the rescheduling of a task by dragging of the Gantt chart bar

 

When a task list is displayed using a Gantt view the user can reschedule a task (often by accident) by dragging the Gantt task bar with the mouse. It’s easy to prevent this with a tiny piece of JavaScript.

 

Steps:

• Go the the page with the Gantt view
     http://yourserver/sites/yoursite/lists/yourtasklist/gantt.aspx
• Click Site Actions, Site Settings, Edit Page
• Click Add a Web Part and add a Content Editor Web Part (CEWP)
• Move the CEWP below the Gantt chart web part
• In the CEWP click Edit then Modify Shared Web Part
• Click the Source Editor button
• Paste the code from below
• Exit the edit mode and try to drag one of the Gantt chart bars.

 
<script>
document.all("GanttTable").ondragstart = function () {alert("Task dragging disabled!")}
</script>

(The text between the script tags is all one line)

 

The result: