How to resize WPF DataGrid to fit its content?

Question

The aim

I would like to set such size for the DataGrid (standard, from WPF) so all cells (text) would be fully visible. I have window with DockPanel, with DataGrid

Answer 1

I just came out of the same problem where I had to give options in a data grid's column to fit its width as per the content of both header and cell. I used the following code:

private void FitToContent()
    {
        // where dg is my data grid's name...
        foreach (DataGridColumn column in dg.Columns)
        {
            //if you want to size your column as per the cell content
            column.Width = new DataGridLength(1.0, DataGridLengthUnitType.SizeToCells);
            //if you want to size your column as per the column header
            column.Width = new DataGridLength(1.0, DataGridLengthUnitType.SizeToHeader);
            //if you want to size your column as per both header and cell content
            column.Width = new DataGridLength(1.0, DataGridLengthUnitType.Auto);
        }
    }

Also I provided an option on columns to fit as per the display (datagrid's width). for that I used the same code above with the following minor change:

column.Width = new DataGridLength(1.0, DataGridLengthUnitType.Star);

FOR ALL COLUMNS : Make sure you keep HorizontalScrollVisibility to Auto.