Tutorial :How to disable Moving/ReOrdering of ListView Header in WPF?



Question:

The WPF ListView control allows to re-order of columns by drag and drop. Is there any way to disable it?

I hope some WPF guru can help me. :)


Solution:1

<ListView.View>       <GridView AllowsColumnReorder="False">        ......headers here........       </GridView>   </ListView.View>  

Try this


Solution:2

I'm using WPF listView with N number of columns where the 1st column must behave like a margin column and it should remain the 1st all the times

How Can I disable the re-order for 1st column only, and keep other columns "reorder-able"?

I can disable the drag-drop of the 1st column using IsHitTestVisible property which will disable the mouse inputs, but I noticed that user can drag the 2nd column (for example) and drop it right before the 1st column and this will swap the 1st column with the 2nd column?

I figured out how to do it:

1) first subscribe to the event:

GridView gridView = this.dbListView.View as GridView;  gridView.Columns.CollectionChanged += new NotifyCollectionChangedEventHandler(Columns_CollectionChanged);  

2) Event handler is:

    /// <summary>      /// This event is executed when the header of the list view is changed -       /// we need to keep the first element in it's position all the time, so whenever user drags any columns and drops      /// it right before the 1st column, we return it to it's original location      /// </summary>      /// <param name="sender"></param>      /// <param name="e"></param>      void Columns_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)      {          GridViewColumnCollection collection = (GridViewColumnCollection)sender;          if (e.Action == NotifyCollectionChangedAction.Move) //re-order event          {              if (e.NewStartingIndex == 0) //if any of the columns were dragged rigth before the 1st column              {                  this.Dispatcher.BeginInvoke((Action)delegate                  {                      GridView gridView = this.dbListView.View as GridView;                      //removing the event to ensure the handler will not be called in an infinite loop                      gridView.Columns.CollectionChanged -= new NotifyCollectionChangedEventHandler(Columns_CollectionChanged);                      //reverse the re-order move (i.e. rolling back this even)                      collection.Move(e.NewStartingIndex, e.OldStartingIndex);                      //re-setup the event to ensure the handler will be called second time                      gridView.Columns.CollectionChanged += new NotifyCollectionChangedEventHandler(Columns_CollectionChanged);                  });              }          }        }  

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