// override to create repeated items
protected override void CreateChildControls()
{
if (!Visible)
{
return;
}
SelectedIndex = -1;
object o = ViewStateAttributes.GetFromViewState("NumItems", null);
if (o != null)
{
// get item ids and indexes for supporting ajax list append, insert and remove operations and restoring the exact previous state
ArrayList itemIds = GetViewStateItemIds();
ArrayList itemIndexes = GetViewStateItemIndexes();
// clear any existing child controls
Controls.Clear();
int numItems = (int)o;
int pageSize = this.PageSize;
for (int i = 0; i < numItems && i < pageSize; i++)
{
// create item
RepeaterItem item = new RepeaterItem(i, null);
InvisibleItem invItem = new InvisibleItem(i, null);
try {
// initialize item id
if (itemIds != null)
{
item.ID = Iterator.FormatId((int)itemIds[i * 2]);
invItem.ID = Iterator.FormatId((int)itemIds[i * 2 + 1]);
}
else
{
item.ID = Iterator.FormatId(i * 2);
invItem.ID = Iterator.FormatId(i * 2 + 1);
}
// initialize item index
if (itemIndexes != null)
{
item.ItemIndex = (int)itemIndexes[i * 2];
invItem.ItemIndex = (int)itemIndexes[i * 2 + 1];
}
} catch (ArgumentOutOfRangeException) {
throw new HEMessageException(MR.GetMessage(MessageId.AjaxListModified, "List Records", this.ID));
}
// initialize item from template
ItemTemplate.InstantiateIn(item);
InvisibleTemplate.InstantiateIn(invItem);
// add item to the child controls collection
Controls.Add(item);
Controls.Add(invItem);
}
}
}
public OSDataGrid()
: base()
{
AllowPaging = true;
AllowCustomPaging = true;
RtWidget = new ListRecordRtWidget(this);
_viewStateAttributes = new ViewStateAttributes(this, Attributes, ViewState);
}
protected override void Render(HtmlTextWriter writer)
{
AjaxEventsHelper.AddAjaxEventAttribute(this, AjaxEventType.onAjaxClick, ClientID, UniqueID, "__OSVSTATE", ViewStateAttributes.InlineAttributes);
ViewStateAttributes.InheritInlineAttributes();
ViewStateAttributes.InlineAttributes.Add("class", _isEmpty ? (string.IsNullOrEmpty(CssClass) ? CssClass : CssClass + " ") + "Empty" : CssClass);
// Render of the datagrid will be delegated in the child OSDataGridTable control
base.Render(writer);
}
protected override void Render(HtmlTextWriter writer)
{
var RenderWrapperTag = Attributes["RenderWrapperTag"] != "false";
object o = ViewStateAttributes.GetFromViewState("NumItems", null);
bool isEmpty = o == null || (o != null && (int)o == 0);
if (RenderWrapperTag)
{
writer.Write("<span id=\"" + ClientID + "\"");
if (isEmpty)
{
if (!string.IsNullOrEmpty(EmptyMessageStyle))
{
writer.Write(" class=\"" + EmptyMessageStyle + "\"");
}
}
else
{
if (!string.IsNullOrEmpty(CssClass))
{
writer.Write(" class=\"" + CssClass + "\"");
}
}
writer.Write(">");
}
if (UseBullets && !isEmpty)
{
writer.Write("<ul>");
}
foreach (Control ctrl in Controls)
{
if (ctrl.GetType() == typeof(RepeaterItem))
{
RenderRepeaterItem(writer, ctrl);
}
}
if (UseBullets && !isEmpty)
{
writer.Write("</ul>");
}
if (isEmpty)
{
RenderEmptyMessage(writer);
}
if (RenderWrapperTag)
{
writer.Write("</span>");
}
}
protected override void LoadViewState(object savedState)
{
base.LoadViewState(savedState);
// check if we need to ensure child controls for this iterator for running onSubmits
if ((bool)ViewStateAttributes.GetFromViewState("EnsureChildControls", false))
{
ViewState.Remove("EnsureChildControls");
EnsureChildControls();
}
}
public void RemoveItem(int itemIndex)
{
// clear selected item, if deleting the current selected index
if (SelectedIndex == itemIndex)
{
SelectedIndex = -1;
}
// find the Repeater Item for this itemItem
int rowIndexToRemove = -1;
for (int i = 0; i < Controls.Count; i += 2)
{
IIteratorItem item = (IIteratorItem)Controls[i];
if (item.ItemIndex == itemIndex)
{
rowIndexToRemove = i;
break;
}
}
IOSList rl = DataSource;
if (rowIndexToRemove == -1 || itemIndex >= rl.Length)
{
throw new ArgumentException("Index of out range");
}
// remove the repeater item
Controls.RemoveAt(rowIndexToRemove);
// remove also the invisible item, now at the same position
Controls.RemoveAt(rowIndexToRemove);
// update the datasource
rl.Remove(itemIndex);
// update item count
ViewStateAttributes.SetInViewState("NumItems", ItemCount, null);
// set the empty property
_isEmpty = (rl.Length == 0);
// decrease higher item indexes in the iterator
foreach (IIteratorItem otherItem in Controls)
{
if (otherItem.ItemIndex > itemIndex)
{
otherItem.ItemIndex--;
}
}
// update item ids and indexes in the viewstate
StoreViewStateItemIdsandIndexes();
}
// override to create repeated items from DataSource
protected override void OnDataBinding(EventArgs e)
{
base.OnDataBinding(e);
if (!Visible)
{
return;
}
if (DataSource != null)
{
_isDataBinding = true;
// clear selected index
SelectedIndex = -1;
// clear widget viewstate storage variable
ClearViewStateStorage(this, e);
// clear any row ids and item indexes, since we are rebuilding all the list
ClearViewStateRowIdsandItemIndexes();
// clear any existing child controls
Controls.Clear();
// clear any previous viewstate for existing child controls
ClearChildViewState();
DataSource.StartIteration();
if (!DataSource.Empty)
{
DataSource.Advance(StartIndex);
}
// iterate DataSource creating a new item for each data item
int i = 0;
int pageSize = this.PageSize;
while (DataSource.MoveNext() && i < pageSize)
{
CreateItem(DataSource, i);
i++;
}
// store the number of items created in viewstate for postback scenarios
object o = ViewStateAttributes.GetFromViewState("NumItems", null);
if (i > 0 || o != null)
{
ViewStateAttributes.SetInViewState("NumItems", i, null);
}
// prevent child controls from being created again
ChildControlsCreated = true;
_isDataBinding = false;
DataSource.EndIteration();
}
}
public string GetValue()
{
string s = Attributes["value"];
if (s != null)
{
return(s);
}
s = ViewStateAttributes.GetFromViewState("value", null) as string;
if (s != null)
{
return(s);
}
return(string.Empty);
}
private void InsertItem(int itemIndex, object dataItem, bool selectItem)
{
// check if the current page is full
IOSList rl = DataSource;
// update the datasource
rl.Insert(dataItem, itemIndex);
// increase higher item indexes in the iterator
foreach (IIteratorItem otherItem in Controls)
{
if (otherItem.ItemIndex >= itemIndex)
{
otherItem.ItemIndex++;
}
}
// create an item at the end of the list (and don't databind...)
CreateItem(dataItem, itemIndex, false);
// update item count
ViewStateAttributes.SetInViewState("NumItems", ItemCount, null);
// update item ids and indexes in the viewstate
StoreViewStateItemIdsandIndexes();
var previousSelectedIndex = SelectedIndex;
var previousDataSourceIndex = rl.CurrentRowNumber;
SelectedIndex = itemIndex;
// set the record list position
rl.SetPosition(itemIndex);
// databind the created item
DataBindLastCreatedItem();
if (!selectItem)
{
// revert the record list position
rl.SetPosition(previousDataSourceIndex);
SelectedIndex = previousSelectedIndex;
}
}
public Iterator() : base()
{
RtWidget = new ListRecordRtWidget(this);
_viewStateAttributes = new ViewStateAttributes(this, Attributes, ViewState);
}
public OSUserControl() : base()
{
_viewStateAttributes = new ViewStateAttributes(this, Attributes, ViewState);
ControlVisibility = new ControlVisibility(this, _viewStateAttributes);
}
public DropDownList()
: base()
{
_viewStateAttributes = new ViewStateAttributes(this, Attributes, ViewState);
}
public CheckBox()
: base(HtmlTextWriterTag.Input)
{
_viewStateAttributes = new ViewStateAttributes(this, Attributes, ViewState);
}
protected OSPageViewState(bool quirksMode) : base(quirksMode)
{
_viewStateAttributes = new ViewStateAttributes(ViewState);
}
public Button()
: base()
{
_viewStateAttributes = new ViewStateAttributes(this, Attributes, ViewState);
}
public ListBox() : base()
{
_viewStateAttributes = new ViewStateAttributes(this, Attributes, ViewState);
}
public void EnsureChildControlsOnPostback()
{
ViewStateAttributes.SetInViewState("EnsureChildControls", true, false);
}
public RadioButton()
: base(System.Web.UI.HtmlTextWriterTag.Input)
{
_viewStateAttributes = new ViewStateAttributes(this, Attributes, ViewState);
}
public ControlVisibility(Control owner, ViewStateAttributes viewState)
{
this.owner = owner;
this.viewState = viewState;
}
