private async Task selectItemAsync(TItem item, object selected)
{
if ((bool)selected)
{
SelectedData.Add(item);
}
else
{
SelectedData.Remove(item);
}
await SelectedDataChanged.InvokeAsync(SelectedData);
StateHasChanged();
}
private async Task selectItemsAsync(List <TItem> items, object selected)
{
foreach (var item in items)
{
if ((bool)selected)
{
if (!SelectedData.Contains(item))
{
SelectedData.Add(item);
}
}
else
{
SelectedData.Remove(item);
}
}
await SelectedDataChanged.InvokeAsync(SelectedData);
StateHasChanged();
}
/// <summary>
/// 更新绑定数据
/// </summary>
private void UpdateBindData()
{
if (SelectedNodesDictionary.Count == 0)
{
SelectedKey = null;
SelectedNode = null;
SelectedData = default(TItem);
SelectedKeys = Array.Empty <string>();
SelectedNodes = Array.Empty <TreeNode <TItem> >();
SelectedDatas = Array.Empty <TItem>();
}
else
{
var selectedFirst = SelectedNodesDictionary.FirstOrDefault();
SelectedKey = selectedFirst.Value?.Key;
SelectedNode = selectedFirst.Value;
SelectedData = selectedFirst.Value.DataItem;
SelectedKeys = SelectedNodesDictionary.Select(x => x.Value.Key).ToArray();
SelectedNodes = SelectedNodesDictionary.Select(x => x.Value).ToArray();
SelectedDatas = SelectedNodesDictionary.Select(x => x.Value.DataItem).ToArray();
}
if (SelectedKeyChanged.HasDelegate)
{
SelectedKeyChanged.InvokeAsync(SelectedKey);
}
if (SelectedNodeChanged.HasDelegate)
{
SelectedNodeChanged.InvokeAsync(SelectedNode);
}
if (SelectedDataChanged.HasDelegate)
{
SelectedDataChanged.InvokeAsync(SelectedData);
}
if (SelectedKeysChanged.HasDelegate)
{
SelectedKeysChanged.InvokeAsync(SelectedKeys);
}
}
/// <summary>
/// 触发数据选择事件
/// </summary>
/// <param name="data"></param>
protected void OnSelectedDataChanged(object data)
{
SelectedDataChanged?.Invoke(data);
}
private void OnSelectedDataChanged()
{
SelectedDataChanged?.Invoke(this, EventArgs.Empty);
}
protected virtual void OnSelectedDataChanged(T e)
{
SelectedDataChanged?.Invoke(this, e);
}