![]() Note that removing groups from the ListView.Groups collection does not remove items from the ListView control. Use this method to remove all the groups from the collection. Item.Group = CType(groups(subItemText), ListViewGroup) SubItemText = subItemText.Substring(0, 1) ' For the Title column, use only the first letter. ' Retrieve the subitem text corresponding to the column.ĭim subItemText As String = item.SubItems(column).Text ' Iterate through the items in myListView, assigning each ' Sort the groups and add them to myListView.Īrray.Sort(groupsArray, New ListViewGroupSorter(myListView.Sorting)) ' Copy the groups for the column to an array.ĭim groupsArray(groups.Count - 1) As ListViewGroup ' Retrieve the hash table corresponding to the column.ĭim groups As Hashtable = CType(groupTables(column), Hashtable) ' Sets myListView to the groups created for the specified column. ListViewGroup groupsArray = new ListViewGroup Īrray.Sort(groupsArray, new ListViewGroupSorter(myListView.Sorting)) įoreach (ListViewItem item in myListView.Items) Hashtable groups = (Hashtable)groupTables Sets myListView to the groups created for the specified column. Assign the item to the matching group. SubItemText = subItemText->Substring(0, 1) For the Title column, use only the first letter. String^ subItemText = item->SubItems->Text Retrieve the subitem text corresponding to the column. ListViewItem^ item = safe_cast(myEnum->Current) IEnumerator^ myEnum = myListView->Items->GetEnumerator() Iterate through the items in myListView, assigning each MyListView->Groups->AddRange(groupsArray) Sort the groups and add them to myListView.Īrray::Sort(groupsArray, gcnew ListViewGroupSorter(myListView->Sorting)) Copy the groups for the column to an array.Īrray^ groupsArray = gcnew array(groups->Count) Hashtable^ groups = dynamic_cast(groupTables) Retrieve the hash table corresponding to the column. Finally, a sorted array of the groups in the hash table is added to the ListViewGroupCollection.įor the complete example, see the ListViewGroupCollection overview reference topic. The hash table corresponding to the clicked column is then retrieved and each item is assigned to the appropriate group. When a column header is clicked, the ListViewGroupCollection is cleared. The groups created for each column are stored in a hash table along with the subitem text or initial letter. For the parent item column, one group is created for each unique initial letter. For each subitem column, one group is created for each unique subitem value. In the example, the groups are created dynamically. This form of grouping is similar to the grouping used in Windows Explorer. The following example demonstrates how the Clear method can be used in an application that organizes ListView items by subitem value in the details view.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |