/// <summary>
/// If a cell value has changed
/// 1. the ItemList has to be updated (remove or add invalid item)
/// 2. the bounded cell has to be updated
/// 3. the fore color of the combobox value has to be updated
/// </summary>
/// <param name="e">event arguments</param>
private void DoCellValueChanged(DataGridViewCellEventArgs e)
{
IsCellValueChangeEventDisabled = true;
if (_cmbItemSources.Keys.Contains(e.ColumnIndex))
{
DataGridViewRow row = this.Rows[e.RowIndex];
ComboBoxConfiguration comboConfig = _cmbItemSources[e.ColumnIndex];
//Get the new value of the cell (if value has been choosen by a an EdintingControl like a combobox, the cell still contains the old value)
object value = (EditingControl != null ? EditingControl.Text : this.Rows[e.RowIndex].Cells[e.ColumnIndex].Value);
if (value == null)
{
value = "";
}
//Update combobox Itemlist
List <object> itemList = comboConfig.GetItemList(row.DataBoundItem);
if (!itemList.Contains(value))
{
itemList.Insert(0, value);
}
DataGridViewComboBoxCell cell = ((DataGridViewComboBoxCell)row.Cells[e.ColumnIndex]);
SetItemList(cell, itemList);
//Update bounded Cell (it is databounded to the GridViews DataSource)
row.Cells[GetBoundedColumnIndex(e.ColumnIndex)].Value = value;
//Update ForeColor of ComboBoxCell
row.Cells[e.ColumnIndex].Style.ForeColor = comboConfig.GetForeColor(value, row.DataBoundItem);
}
IsCellValueChangeEventDisabled = false;
}
/// <summary>
/// React if the ItemSource for the ItemList has changed
/// </summary>
/// <param name="sender">event sender</param>
/// <param name="e">event arguments</param>
private void DataSource_ListChanged(object sender, ListChangedEventArgs e)
{
IsCellValueChangeEventDisabled = true;
BindingList <object> itemSource = (BindingList <object>)sender;
// Iterate through all combobox configurations to find the config that contains the changed itemSource
foreach (int columnIndex in _cmbItemSources.Keys)
{
ComboBoxConfiguration comboConfig = _cmbItemSources[columnIndex];
if (comboConfig.HasItemSource(itemSource))
{
foreach (DataGridViewRow row in this.Rows)
{
if (comboConfig.HasItemSource(itemSource, row.DataBoundItem))
{
List <object> itemList = comboConfig.GetItemList(row.DataBoundItem);
object value = row.Cells[columnIndex].Value;
DataGridViewComboBoxCell cell = ((DataGridViewComboBoxCell)row.Cells[columnIndex]);
//the cells value must be containced in the itemList:
if (!itemList.Contains(value))
{
itemList.Insert(0, value);
}
//Update ItemList
SetItemList(cell, itemList);
//Update Fore Color of the combobox cell
row.Cells[columnIndex].Style.ForeColor = comboConfig.GetForeColor(value, row.DataBoundItem);
}
}
}
}
IsCellValueChangeEventDisabled = false;
}
