Force resize of GridView columns inside ListView

Question

I have a ListView WPF control with GridView which I'd like to resize the GridView columns, when the content of the columns changes. I have several distinct data sets but when I change from one to another, the size of each columns fits the previous data. I'd like to update dynamically. How can I do that?

Answer 1

you could measure the longest string in pixels and then adjust the column widths accordingly:

Graphics graphics = this.CreateGraphics();
SizeF textSize = graphics.MeasureString("How long am I?", this.Font);

if you create an algorithm for sizing each column as a ratio of these lengths you should get a good result.

Answer 2

Finally, some results on this one. I've found a way to do the same auto-sizing that is done initially and when the gripper on a column header is double clicked.

public void AutoSizeColumns()
{
    GridView gv = listView1.View as GridView;
    if (gv != null)
    {
        foreach (var c in gv.Columns)
        {
            // Code below was found in GridViewColumnHeader.OnGripperDoubleClicked() event handler (using Reflector)
            // i.e. it is the same code that is executed when the gripper is double clicked
            if (double.IsNaN(c.Width))
            {
                c.Width = c.ActualWidth;
            }
            c.Width = double.NaN;
        }
    }
}

Answer 3

Isn't there a way to bind to the ActualWidth of the column? Something like :

<GridViewColumn x:Name="column1" Width="{Binding ElementName=column1, Path=ActualWidth}" />

I have tried this and it works only the first time, it seems. No binding error.