public static async Task <string> GetSelectedItemTextForModelAsync(this IChoiceDataSourceSelector dataSourceSelector, ViewDataDictionary viewData)
{
var modelValue = viewData?.Model?.ToString() ?? string.Empty;
if (!string.IsNullOrWhiteSpace(modelValue) && (viewData?.ModelMetadata.AdditionalValues.ContainsKey(ChoiceDataSourceAttribute.Key) ?? false))
{
if (viewData.ModelMetadata.AdditionalValues.TryGetValue(ChoiceDataSourceAttribute.Key, out var type) && type is Type datasourceType)
{
var dataSource = dataSourceSelector.Get(datasourceType);
if (dataSource != null)
{
var item = await dataSource.GetAsync(modelValue);
return(item.Text);
}
}
}
return(modelValue);
}
public static async Task <IEnumerable <ChoiceItem> > GetChoiceItemForModelAsync2(this IChoiceDataSourceSelector dataSourceSelector, ViewDataDictionary viewData)
{
var selectedItemsList = new List <ChoiceItem>();
if (viewData.ModelMetadata.AdditionalValues.ContainsKey(ChoiceDataSourceAttribute.Key))
{
if (viewData.ModelMetadata.AdditionalValues.TryGetValue(ChoiceDataSourceAttribute.Key, out var type) && type is Type datasourceType)
{
var dataSource = dataSourceSelector.Get(datasourceType);
if (dataSource != null)
{
if (viewData.ModelMetadata.IsEnumerableType && viewData.Model is IEnumerable selectedItems)
{
foreach (var selectedItem in selectedItems)
{
var item = await dataSource.GetAsync(selectedItem.ToString());
selectedItemsList.Add(item);
}
}
else
{
var item = await dataSource.GetAsync(viewData.Model?.ToString() ?? string.Empty);
selectedItemsList.Add(item);
}
}
}
}
else
{
if (viewData.ModelMetadata.IsEnumerableType && viewData.Model is IEnumerable selectedItems)
{
foreach (var selectedItem in selectedItems)
{
selectedItemsList.Add(new ChoiceItem(selectedItem?.ToString() ?? string.Empty, selectedItem?.ToString() ?? string.Empty));
}
}
else
{
selectedItemsList.Add(new ChoiceItem(viewData.Model?.ToString() ?? string.Empty, viewData.Model?.ToString() ?? string.Empty));
}
}
return(selectedItemsList);
}
public static async Task <IEnumerable <SelectListItem> > GetSelectListItemsForModelAsync(this IChoiceDataSourceSelector dataSourceSelector, ViewDataDictionary viewData)
{
if (viewData.ModelMetadata.AdditionalValues.ContainsKey(ChoiceDataSourceAttribute.Key))
{
if (viewData.ModelMetadata.AdditionalValues.TryGetValue(ChoiceDataSourceAttribute.Key, out var type) && type is Type datasourceType)
{
var dataSource = dataSourceSelector.Get(datasourceType);
if (dataSource != null)
{
var items = await dataSource.GetAsync();
return(items
.GroupBy(c => c.Group)
.SelectMany(c =>
{
SelectListGroup?group = string.IsNullOrWhiteSpace(c.Key) ? null : new SelectListGroup {
Name = c.Key
};
return c.Select(s => new SelectListItem(s.Text, s.Value)
{
Group = group,
Disabled = s.Disabled
});
})
?? Enumerable.Empty <SelectListItem>());
}
}
}
return(Enumerable.Empty <SelectListItem>());
}
public static async Task <IEnumerable <ChoiceItem> > GetChoiceItemForModelAsync(this IChoiceDataSourceSelector dataSourceSelector, ViewDataDictionary viewData)
{
var selectedItemsList = new List <ChoiceItem>();
if (viewData.ModelMetadata.IsEnumerableType && viewData.Model is IEnumerable selectedItems)
{
if (viewData.ModelMetadata.AdditionalValues.TryGetValue(ChoiceDataSourceAttribute.Key, out var type) && type is Type datasourceType)
{
var dataSource = dataSourceSelector.Get(datasourceType);
foreach (var selectedItem in selectedItems)
{
var selectedItemValue = selectedItem?.ToString() ?? string.Empty;
var selectedItemText = selectedItem?.ToString() ?? string.Empty;
if (selectedItem?.GetType().IsEnum ?? false)
{
selectedItemText = Enum.Format(selectedItem?.GetType(), selectedItem ?? default(int), "G");
selectedItemValue = Enum.Format(selectedItem?.GetType(), selectedItem ?? default(int), "D");
}
var item = dataSource != null ? await dataSource.GetAsync(selectedItemValue) : new ChoiceItem(selectedItemValue, selectedItemText, null, true);
selectedItemsList.Add(item);
}
}
else
{
foreach (var selectedItem in selectedItems)
{
var selectedItemValue = selectedItem?.ToString() ?? string.Empty;
var selectedItemText = selectedItem?.ToString() ?? string.Empty;
if (selectedItem?.GetType().IsEnum ?? false)
{
selectedItemText = Enum.Format(selectedItem.GetType(), selectedItem, "G");
selectedItemValue = Enum.Format(selectedItem.GetType(), selectedItem, "D");
}
selectedItemsList.Add(new ChoiceItem(selectedItemValue, selectedItemText));
}
}
}
else
{
var selectedItemValue = viewData.Model?.ToString() ?? string.Empty;
var selectedItemText = viewData.Model?.ToString() ?? string.Empty;
if (viewData.ModelMetadata.IsEnum)
{
selectedItemText = Enum.Format(viewData.ModelMetadata.UnderlyingOrModelType, viewData.Model ?? default(int), "G");
selectedItemValue = Enum.Format(viewData.ModelMetadata.UnderlyingOrModelType, viewData.Model ?? default(int), "D");
}
if (viewData.ModelMetadata.AdditionalValues.TryGetValue(ChoiceDataSourceAttribute.Key, out var type) && type is Type datasourceType)
{
var dataSource = dataSourceSelector.Get(datasourceType);
var item = await dataSource.GetAsync(selectedItemValue);
selectedItemsList.Add(item);
}
else
{
selectedItemsList.Add(new ChoiceItem(selectedItemValue, selectedItemText));
}
}
return(selectedItemsList);
}