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chrisliando

[.net] Sorting listView items by Column click WITH each column support toggle ASC/DESC sorti

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I would like to ask how can I handle Sorting listView items by Column click? I have successfully implement this one: This one manage listView1_ColumnClick event: private: System::Void listView1_ColumnClick(System:bject^ sender, System::Windows::Forms::ColumnClickEventArgs^ e) { // Determine whether the column is the same as the last column clicked. if (e->Column != sortColumn) { // Set the sort column to the new column. sortColumn = e->Column; // Set the sort order to ascending by default. if (listView1->Sorting == SortOrder::Ascending) listView1->Sorting = SortOrder:escending; else listView1->Sorting = SortOrder::Ascending; //listView1->Sorting = SortOrder::Ascending; } else { // Determine what the last sort order was and change it. if (listView1->Sorting == SortOrder::Ascending) listView1->Sorting = SortOrder:escending; else listView1->Sorting = SortOrder::Ascending; } // Call the sort method to manually sort. listView1->Sort(); // Set the ListViewItemSorter property to a new ListViewItemComparer // object. this->listView1->ListViewItemSorter = gcnew ListViewItemComparer(e->Column, listView1->Sorting); } //listView1_ColumnClick }; This one manage the class ListViewItemComparer: ref class ListViewItemComparer : System::Collections::IComparer { private: int col; private: SortOrder^ order; public: ListViewItemComparer() { col = 0; order = SortOrder::Ascending; } public: ListViewItemComparer(int column, SortOrder^ order) { col = column; this->order = order; } public: virtual int Compare(Object^ x, Object^ y) { int returnVal= -1; returnVal = String::Compare(((ListViewItem^)x)->SubItems[col]->Text, ((ListViewItem^)y)->SubItems[col]->Text); // Determine whether the sort order is descending. if(order == SortOrder:escending) // Invert the value returned by String.Compare. returnVal *= -1; return returnVal; } }; it is working but what I want is like the Windows Explorer, so if I click a column it will be sorted either Ascending or Descending and if I click that same column again, it will be sorted reversely. What have I done above CANNOT do this. How to do this? If you don't mind, please fix my codes above. Thank you very much.

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