// 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);
}
}
}
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();
}
}
private IDictionary <string, bool> GetVisibilityDictionary(bool createIfNotExists)
{
var result = (IDictionary <string, bool>)viewState.GetFromViewState(INPUT_VISIBILITY_KEY_IN_VIEWSTATE, null);
if ((result == null) && createIfNotExists)
{
result = new Dictionary <string, bool>();
viewState.SetInViewState(INPUT_VISIBILITY_KEY_IN_VIEWSTATE, result, null);
}
return(result);
}
// 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);
}