protected virtual bool LoadPostData(string postDataKey, NameValueCollection postCollection)
{
if (!Enabled)
{
return(false);
}
int newSelectedIndex = Convert.ToInt32(postCollection.GetValues(HiddenFieldControl.UniqueID)[0], CultureInfo.InvariantCulture);
EnsureDataBound();
if (newSelectedIndex == -2 && (DropDownStyle == ComboBoxStyle.Simple || DropDownStyle == ComboBoxStyle.DropDown))
{
string newText = postCollection.GetValues(TextBoxControl.UniqueID)[0];
ComboBoxItemInsertEventArgs eventArgs = new ComboBoxItemInsertEventArgs(newText, ItemInsertLocation);
this.OnItemInserting(eventArgs);
if (!eventArgs.Cancel)
{
this.InsertItem(eventArgs);
}
else
{
TextBoxControl.Text = (SelectedIndex < 0) ? string.Empty : SelectedItem.Text;
}
}
else if (newSelectedIndex != SelectedIndex)
{
SelectedIndex = newSelectedIndex;
return(true);
}
return(false);
}
protected void ComboBox1_ItemInserted(object sender, AjaxControlToolkit.ComboBoxItemInsertEventArgs e)
{
// user has inserted a new item into the demo combobox
FeedbackItemInsertedLabel.Text = String.Format(FeedbackItemInsertedLabel.Text, ComboBox1.SelectedItem.Text);
FeedbackPanel.Visible = true;
FeedbackItemInsertedLabel.Visible = true;
}
protected virtual void OnItemInserted(ComboBoxItemInsertEventArgs e)
{
EventHandler <ComboBoxItemInsertEventArgs> handler = (EventHandler <ComboBoxItemInsertEventArgs>)Events[EventItemInserted];
if (handler != null)
{
handler(this, e);
}
}
protected virtual void InsertItem(ComboBoxItemInsertEventArgs e)
{
if (!e.Cancel)
{
var insertIndex = -1;
if (e.InsertLocation == ComboBoxItemInsertLocation.Prepend)
{
insertIndex = 0;
}
else if (e.InsertLocation == ComboBoxItemInsertLocation.Append)
{
insertIndex = Items.Count;
}
else if (e.InsertLocation == ComboBoxItemInsertLocation.OrdinalText)
{
// loop through items collection to find proper insertion point
insertIndex = 0;
foreach (ListItem li in Items)
{
int compareValue = string.Compare(e.Item.Text, li.Text, StringComparison.Ordinal);
if (compareValue > 0)
{
++insertIndex;
}
else
{
break;
}
}
}
else if (e.InsertLocation == ComboBoxItemInsertLocation.OrdinalValue)
{
// loop through items collection to find proper insertion point
insertIndex = 0;
foreach (ListItem li in Items)
{
int compareValue = string.Compare(e.Item.Value, li.Value, StringComparison.Ordinal);
if (compareValue > 0)
{
++insertIndex;
}
else
{
break;
}
}
}
if (insertIndex >= Items.Count)
{
Items.Add(e.Item);
SelectedIndex = Items.Count - 1;
}
else
{
Items.Insert(insertIndex, e.Item);
SelectedIndex = insertIndex;
}
OnItemInserted(e);
}
}
protected virtual void OnItemInserting(ComboBoxItemInsertEventArgs e)
{
EventHandler<ComboBoxItemInsertEventArgs> handler = (EventHandler<ComboBoxItemInsertEventArgs>)Events[EventItemInserting];
if (handler != null)
handler(this, e);
}
protected virtual bool LoadPostData(string postDataKey, NameValueCollection postCollection)
{
if (!Enabled)
return false;
int newSelectedIndex = Convert.ToInt32(postCollection.GetValues(HiddenFieldControl.UniqueID)[0], CultureInfo.InvariantCulture);
EnsureDataBound();
if (newSelectedIndex == -2 && (DropDownStyle == ComboBoxStyle.Simple || DropDownStyle == ComboBoxStyle.DropDown))
{
string newText = postCollection.GetValues(TextBoxControl.UniqueID)[0];
ComboBoxItemInsertEventArgs eventArgs = new ComboBoxItemInsertEventArgs(newText, ItemInsertLocation);
this.OnItemInserting(eventArgs);
if (!eventArgs.Cancel)
{
this.InsertItem(eventArgs);
}
else
{
TextBoxControl.Text = (SelectedIndex < 0) ? string.Empty : SelectedItem.Text;
}
}
else if (newSelectedIndex != SelectedIndex)
{
SelectedIndex = newSelectedIndex;
return true;
}
return false;
}
protected virtual void InsertItem(ComboBoxItemInsertEventArgs e)
{
if (!e.Cancel)
{
var insertIndex = -1;
if (e.InsertLocation == ComboBoxItemInsertLocation.Prepend)
{
insertIndex = 0;
}
else if (e.InsertLocation == ComboBoxItemInsertLocation.Append)
{
insertIndex = Items.Count;
}
else if (e.InsertLocation == ComboBoxItemInsertLocation.OrdinalText)
{
// loop through items collection to find proper insertion point
insertIndex = 0;
foreach (ListItem li in Items)
{
int compareValue = string.Compare(e.Item.Text, li.Text, StringComparison.Ordinal);
if (compareValue > 0)
{
++insertIndex;
}
else
{
break;
}
}
}
else if (e.InsertLocation == ComboBoxItemInsertLocation.OrdinalValue)
{
// loop through items collection to find proper insertion point
insertIndex = 0;
foreach (ListItem li in Items)
{
int compareValue = string.Compare(e.Item.Value, li.Value, StringComparison.Ordinal);
if (compareValue > 0)
{
++insertIndex;
}
else
{
break;
}
}
}
if (insertIndex >= Items.Count)
{
Items.Add(e.Item);
SelectedIndex = Items.Count - 1;
}
else
{
Items.Insert(insertIndex, e.Item);
SelectedIndex = insertIndex;
}
OnItemInserted(e);
}
}
