/// <summary>
/// Selects or clears the selection for the specified item in a System.Windows.Forms.ListBox.
/// </summary>
/// <param name="lstBox">The listbox parent.</param>
/// <param name="index">The index of the item.</param>
/// <param name="value">The value to set to selected property.</param>
public static void SetSelected(System.Windows.Forms.ListBox lstBox, int index, bool value)
{
if ((index < -1) || (index >= lstBox.Items.Count))
throw new Exception("Invalid property value");
if (lstBox.GetSelected(index) != value)
{
if ((value) && ((lstBox.SelectionMode == SelectionMode.MultiSimple) || (lstBox.SelectionMode == SelectionMode.MultiExtended)))
{
if (selectedIndexList.ContainsKey(lstBox))
selectedIndexList[lstBox] = index;
else
throw new Exception("SelectedIndex property not stored for a MultiSelect ListBox, "
+ "please add a ListBoxHelper to the form and set the property SelectionMode again");
}
lstBox.SetSelected(index, value);
}
}
/// <summary>
/// Reloads items in the <c>ListBox</c>. If items are not sorted,
/// selections are kept.
/// </summary>
/// <param name="listBox">
/// <c>ListBox</c> to localize.
/// </param>
/// <param name="resources">
/// <c>ResourceManager</c> object.
/// </param>
private void ReloadListBoxItems(System.Windows.Forms.ListBox listBox, System.Resources.ResourceManager resources) {
if (listBox.Items.Count > 0) {
int[] selectedItems = new int[listBox.SelectedIndices.Count];
listBox.SelectedIndices.CopyTo(selectedItems, 0);
ReloadItems(listBox.Name, listBox.Items, listBox.Items.Count, resources);
if (!listBox.Sorted) {
for (int i = 0; i < selectedItems.Length; i++) {
listBox.SetSelected(selectedItems[i], true);
}
}
}
}
/// <summary>
/// Function to set the selected index of a ListBox. Its behavior depends on
/// the selection mode property.
/// </summary>
/// <param name="lstBox">The listbox to set the SelectedIndex.</param>
/// <param name="SelectedIndex">The value to be set.</param>
/// <returns>Returns the selectedIndex after the operation.</returns>
public static int SetSelectedIndex(System.Windows.Forms.ListBox lstBox, int SelectedIndex)
{
int currSelectedIndex = 0;
bool mustBeClean = false;
if ((lstBox.SelectionMode == SelectionMode.MultiSimple) || (lstBox.SelectionMode == SelectionMode.MultiExtended))
{
if (selectedIndexList.ContainsKey(lstBox))
selectedIndexList[lstBox] = SelectedIndex;
else
throw new Exception("SelectedIndex property not stored for a MultiSelect ListBox, "
+ "please add a ListBoxHelper to the form and set the property SelectionMode again");
currSelectedIndex = lstBox.SelectedIndex;
if ((SelectedIndex > -1) && (SelectedIndex < lstBox.Items.Count))
{
mustBeClean = !lstBox.SelectedIndices.Contains(SelectedIndex);
lstBox.SetSelected(SelectedIndex, true);
if (mustBeClean)
{
ControlHelper.DisableControlEvents(lstBox, "SelectedIndexChanged");
lstBox.SetSelected(SelectedIndex, false);
ControlHelper.EnableControlEvents(lstBox, "SelectedIndexChanged");
}
}
else
{
if (lstBox.Items.Count > 0)
lstBox.SelectedIndex = 0;
lstBox.SelectedIndex = -1;
}
lstBox.SelectedIndex = currSelectedIndex;
}
else
{
if ((SelectedIndex < -1) || (SelectedIndex >= lstBox.Items.Count))
throw new Exception("Invalid property value");
lstBox.SelectedIndex = SelectedIndex;
}
return GetSelectedIndex(lstBox);
}
