</ iframe > </noscript> <!-- End Google Tag Manager (noscript) --> <div id="BeforeHeaderContent"> </div> <div id="HeaderContent"> <div id="ProjectTitle">GanttView for WinForms</div> <div id="PageTitle"><div id="PageTitleText">Adding a Predecessor Programmatically </div></div> </div> <div id="AfterHeaderContent"> <!-- Spacing --> <span id="ToggleAllSectionsLink" class="FunctionLink"> <label id="CollapseAllLabel">Collapse All</label> <label id="ExpandAllLabel" style="display: none;">Expand All</label> </span> </div> <div class="BreadcrumbsContainer"><table><tr><td> <a href="ganttviewforwinforms3.html">GanttView for WinForms Task-Based Help</a> > <a href="creatingpredecessors.html">Creating Predecessors</a> > Adding a Predecessor Programmatically </td></tr></table></div> <div id="BodyContent"> <p>To programmatically add a predecessor, complete the following:</p> <p class="hs-toggler">To write code in Visual Basic</p> <div class="hs-toggler-container" style="DISPLAY: none"> <div class="FilteredContentVB" data-title="VB" data-itemid="VB"> <table class="SyntaxTable"> <tbody> <tr> <th>Visual Basic</th> <th> <div class="CopyCodeWrapper"> <span class="CopyCode">Copy Code</span> </div> </th> </tr> <tr> <td colspan="2"> <pre> Private Sub btnAddPredecessor_Click(sender As Object, e As EventArgs) <font color="green">' find task1 and task2</font> Dim task1 As Task = ganttView.Tasks.Search("Task 1") Dim task2 As Task = ganttView.Tasks.Search("Task 2") If task1 IsNot Nothing AndAlso task2 IsNot Nothing AndAlso task2.Predecessors.Count = 0 Then <font color="green">' switch to auto-scheduling mode</font> task2.Mode = TaskMode.Automatic Dim p As New Predecessor() p.PredecessorTask = task1 task2.Predecessors.Add(p) <font color="green">' restore the manual mode</font> task2.Mode = TaskMode.Manual End If End Sub </pre> </td> </tr> </tbody> </table> </div> </div> <p class="hs-toggler">To write code in C#</p> <div class="hs-toggler-container" style="DISPLAY: none"> <div class="FilteredContentCS" data-title="CS" data-itemid="CS"> <table class="SyntaxTable"> <tbody> <tr> <th>C#</th> <th> <div class="CopyCodeWrapper"> <span class="CopyCode">Copy Code</span> </div> </th> </tr> <tr> <td colspan="2"> <pre> private void btnAddPredecessor_Click(object sender, EventArgs e) { <font color="green">// find task1 and task2</font> Task task1 = ganttView.Tasks.Search("Task 1"); Task task2 = ganttView.Tasks.Search("Task 2"); if (task1 != null && task2 != null && task2.Predecessors.Count == 0) { <font color="green">// switch to auto-scheduling mode</font> task2.Mode = TaskMode.Automatic; Predecessor p = new Predecessor(); p.PredecessorTask = task1; task2.Predecessors.Add(p); <font color="green">// restore the manual mode</font> task2.Mode = TaskMode.Manual; } } </pre> </td> </tr> </tbody> </table> </div> </div> <a name="seealsobookmark"></a> <div class="SectionHeading" id="seealsoSectionHeading"><span class="SectionHeadingIcon"><!-- --></span><span class="SectionHeadingText">See Also</span></div><div id="seealsoSectionContent" class="SectionContent"><div class="SeeAlsoLink"> <a href="creatingafinishtosta.html">Creating a Finish to Start Predecessor Type</a></div> </div> </div> <div id="FooterContent"> <p> </p><p> </p><hr style="height: 1px"><p>Copyright © <script type="text/javascript"> var theDate=new Date() document.write(theDate.getFullYear()) </script> GrapeCity, inc. All rights reserved. <script>$(document).ready(function() { if (!(window.self !== window.top)) { // Not running in a frameset // Get the page name var pageName = location.href.substring(location.href.lastIndexOf("/") + 1); if (pageName.indexOf("#") != -1) { pageName = pageName.substring(0, pageName.indexOf("#")); } // Append to webframe.html var framePage = "webframe.html#" + pageName; location.href = framePage; } }); </script></p> <a target="_blank" href="http://our.componentone.com/groups/">Product Support Forum</a> | <a target="_blank" href="http://feedback.componentone.com/forums/255782-winforms-documentation">Documentation Feedback</a> </div> </body> </html>