Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Is there a way to force TreeView to load data on demand? In the other hand TreeView must load data only when a node is to be expanded. TreeView is binded to a collection of data that is implementing IHierarchyData.
Three steps to do the trick:
1 – Set the TreeView.ExpandDepth to 0. This eliminates the expansion of the added
TreeNodeobjects in theTreeViewand shows the expansion symbol [+] next to eachTreeNodethat has theTreeNode.PopulateOnDemandproperty set to true.2- Set the TreeNode.PopulateOnDemand to True for each branch
TreeNode. When theTreeNode.ChildNodescollection is empty, the expansion symbol [+] will be showed only next toTreeNodeobjects that hasTreeNode.PopulateOnDemandproperty set to true.3- Handle the TreeView.TreeNodePopulate event to poulate branch nodes on expansion. This event will be fired when a
TreeNode– with theTreeNode.PopulateOnDemandset to true – has been expanded right before theTreeView.TreeNodeExpandedevent gets fired.