/// <summary>
/// Serializa un item a una cadena
/// </summary>
/// <param name="item">The item.</param>
/// <returns></returns>
/// <date>02/12/2013</date>
/// <author>VAR</author>
public static string Serialize(DropDownListItem item)
{
return(string.Format("{0};{1};{2};{3}",
item.Value.Replace("\\", "\\\\").Replace(";", "\\;"),
item.Text.Replace("\\", "\\\\").Replace(";", "\\;"),
item.InUse ? 1 : 0,
item.CssClass.Replace("\\", "\\\\").Replace(";", "\\;")));
}
/// <summary>
/// Borra todos los items que tengan InUse a false, excepto el seleccionado
/// </summary>
/// <date>03/12/2013</date>
/// <author>VAR</author>
public void RemoveNotInUse()
{
int i = 0;
if (_multiselection == false)
{
while (i < _items.Count)
{
if (i == _selectedIndex)
{
i++; continue;
}
if (!_items[i].InUse)
{
_items.RemoveAt(i);
if (_selectedIndex > i)
{
_selectedIndex--;
}
}
else
{
i++;
}
}
}
else
{
while (i < _items.Count)
{
DropDownListItem selectedItem = null;
for (int j = 0; j < _selectedItems.Count; j++)
{
if (_selectedItems[j].Value == _items[i].Value)
{
selectedItem = _selectedItems[j];
break;
}
}
if (selectedItem != null)
{
i++; continue;
}
if (!_items[i].InUse)
{
_items.RemoveAt(i);
}
else
{
i++;
}
}
}
}
public override void LoadData(DataTable dt)
{
_items.Clear();
SelectedIndex = -1;
if (dt == null || dt.Rows.Count <= 0)
{
Enabled = false;
return;
}
foreach (DataRow dr in dt.Rows)
{
DropDownListItem item = ItemFormDataRow(dr);
if (_translateItems)
{
item.Text = item.Text;
}
_items.Add(item);
}
if (_sortByText)
{
_items.Sort((a, b) => a.Text.CompareTo(b.Text));
}
if (_multiselection == false)
{
if (string.IsNullOrEmpty(_defaultItemText))
{
_items.Insert(0, new DropDownListItem {
Text = "SelectOne", Value = string.Empty
});
}
else
{
_items.Insert(0, new DropDownListItem {
Text = _defaultItemText, Value = string.Empty
});
}
}
Enabled = true;
_loaded = true;
}
private DropDownListItem ItemFormDataRow(DataRow dr)
{
var item = new DropDownListItem();
if (!String.IsNullOrEmpty(_dataTextField) && dr.Table.Columns.Contains(_dataTextField))
{
item.Text = Convert.ToString(dr[_dataTextField]);
}
if (!String.IsNullOrEmpty(_dataValueField) && dr.Table.Columns.Contains(_dataValueField))
{
item.Value = Convert.ToString(dr[_dataValueField]);
}
if (!String.IsNullOrEmpty(_dataInUseField) && dr.Table.Columns.Contains(_dataInUseField))
{
item.InUse = true;
}
if (!String.IsNullOrEmpty(_dataCSSClassField) && dr.Table.Columns.Contains(_dataCSSClassField))
{
item.CssClass = Convert.ToString(dr[_dataCSSClassField]);
}
return(item);
}
protected override object SaveViewState()
{
// Seriar items
var sbItems = new StringBuilder();
string strItem = null;
foreach (DropDownListItem item in _items)
{
if (strItem != null)
{
sbItems.Append('|');
}
strItem = DropDownListItem.Serialize(item).Replace("|", "\\|");
sbItems.Append(strItem);
}
ViewState["Items"] = sbItems.ToString();
ViewState["SelectedIndex"] = SelectedIndex;
ViewState["Loaded"] = _loaded;
return(base.SaveViewState());
}
protected override void LoadViewState(object savedState)
{
base.LoadViewState(savedState);
// Deseriar items
_items.Clear();
var strItems = (string)ViewState["Items"];
List <string> listStrItems = SplitUnscaped(strItems, '|');
foreach (string strItem in listStrItems)
{
DropDownListItem item = DropDownListItem.Deserialize(strItem);
if (item == null)
{
continue;
}
_items.Add(item);
}
SelectedIndex = Convert.ToInt32(ViewState["SelectedIndex"]);
_loaded = Convert.ToBoolean(ViewState["Loaded"]);
}
/// <summary>
/// Obtiene el texto asignado a un valor
/// </summary>
/// <param name="value">The value.</param>
/// <returns></returns>
/// <date>22/08/2014</date>
/// <author>VAR</author>
public string GetTextFromValue(string value)
{
DropDownListItem item = _items.FirstOrDefault(it => (it.Value == value));
return(item != null ? item.Text : null);
}
private void SetSelection(DropDownListItem item, int i)
{
_selectedItem = item;
_selectedIndex = i;
Text = SelectedText;
}
private void ClearSelection()
{
_selectedItem = null;
_selectedIndex = -1;
Text = string.Empty;
}