// customize the columns of a C1FlexGrid control
// use dynamic type in order to avoid dependencies.
static void CustomizeFlexGrid(dynamic flex, Type entType, EntityDataSource entDataSource)
{
// configure columns
foreach (dynamic c in flex.Cols)
{
// if the column is a key, make it read-only
var pi = entType.GetProperty(c.Name);
if (pi != null)
{
var atts = pi.GetCustomAttributes(typeof(EdmScalarPropertyAttribute), false);
if (atts.Length > 0)
{
var att = atts[0] as EdmScalarPropertyAttribute;
if (att.EntityKeyProperty)
{
c.AllowEditing = false;
}
}
// if the column holds entities, give it a data map
var type = pi.PropertyType;
if (!type.IsPrimitive)// typeof(EntityObject).IsAssignableFrom(type))
{
c.DataMap = entDataSource.GetLookupDictionary(type);
}
}
}
}
void _btnRefresh_Click(object sender, EventArgs e)
{
if (EntityDataSource != null)
{
EntityDataSource.Refresh();
}
}
void _btnCancel_Click(object sender, EventArgs e)
{
if (EntityDataSource != null)
{
EntityDataSource.CancelChanges();
}
}
// save/cancel/refresh
void _btnSave_Click(object sender, EventArgs e)
{
if (EntityDataSource != null)
{
EntityDataSource.SaveChanges();
}
}
public CollectionPropertyDescriptor(EntityDataSource ds, PropertyDescriptor pd)
: base(pd.Name, null)
{
_ds = ds;
_pd = pd;
var elementType = _pd.PropertyType.GetGenericArguments()[0];
_listType = typeof(EntityBindingList <>);
_listType = _listType.MakeGenericType(elementType);
}
ListDictionary _dctLookup; // lookup dictionary (used to show and edit related entities in grid cells)
#endregion
//-------------------------------------------------------------------------
#region ** ctor
/// <summary>
/// Initializes a new instance of a <see cref="EntitySet"/>.
/// </summary>
/// <param name="ds"><see cref="EntityDataSource"/> that owns the entities.</param>
/// <param name="pi"><see cref="PropertyInfo"/> used to retrieve the set from the context.</param>
internal EntitySet(EntityDataSource ds, PropertyInfo pi)
{
var type = pi.PropertyType;
Debug.Assert(
type.IsGenericType &&
type.GetGenericTypeDefinition() == typeof(DbSet <>) &&
type.GetGenericArguments().Length == 1);
_ds = ds;
_pi = pi;
_elementType = type.GetGenericArguments()[0];
}
// customize the columns of a DataGridView
static void CustomizeDataGridView(DataGridView dgv, Type entType, EntityDataSource entDataSource)
{
// configure columns
for (int colIndex = 0; colIndex < dgv.Columns.Count; colIndex++)
{
// get column
var c = dgv.Columns[colIndex];
// if the column is a key, make it read-only
var pi = entType.GetProperty(c.DataPropertyName);
if (pi != null)
{
var atts = pi.GetCustomAttributes(typeof(EdmScalarPropertyAttribute), false);
if (atts.Length > 0)
{
var att = atts[0] as EdmScalarPropertyAttribute;
if (att.EntityKeyProperty)
{
c.ReadOnly = true;
}
}
// if the column holds entities, give it a data map
var type = pi.PropertyType;
if (!type.IsPrimitive)
//if (typeof(EntityObject).IsAssignableFrom(type))
{
var map = entDataSource.GetLookupDictionary(type);
if (map != null)
{
var col = new DataGridViewComboBoxColumn();
col.HeaderText = c.HeaderText;
col.DataPropertyName = c.DataPropertyName;
col.Width = c.Width;
col.DefaultCellStyle = c.DefaultCellStyle;
col.DataSource = map;
col.ValueMember = "Key";
col.DisplayMember = "Value";
dgv.Columns.RemoveAt(colIndex);
dgv.Columns.Insert(colIndex, col);
}
}
}
}
}
//----------------------------------------------------------------------------
#region ** ctor
/// <summary>
/// Initializes a new instance of a <see cref="EntityBindingList"/>.
/// </summary>
/// <param name="dataSource"><see cref="EntityDataSource"/> that owns the entities on this list.</param>
/// <param name="query"><see cref="IEnumerable"/> that provides the entities for this list.</param>
/// <param name="name">A name for identifying this list in its parent (for hierarchical binding).</param>
public EntityBindingList(EntityDataSource dataSource, IEnumerable query, string name)
{
_ds = dataSource;
_set = query as DbSet <T>;
_coll = query as EntityCollection <T>;
_query = query;
_name = name;
// populate list
if (dataSource != null && !dataSource.DesignMode)
{
// at run time, get the data
Refresh();
}
else
{
// at design time, add one element to help with binding
try
{
AddNew();
}
catch { }
}
}