好的,我想出了一个技巧 - 我真的很讨厌我必须这样做,但我没有看到另一种解决方法,我相信它会在某个时候崩溃。
我已经通过自己的 ModelBinder 实现了一些其他问题(例如作为属性的类),因此已经将其扩展为包含此代码。我们所有的钥匙都使用 Guid。
如果下面有任何替代方案,请告诉我。
html
<%= Html.CheckBox("markedItem" + Model.Id, false)%>
C#
(GuidLength 是一个 const int = 36,Left 和 Right 是我们自己的字符串扩展)
//Correct checkbox values - pull all the values back from the context that might be from a checkbox. If we can parse a Guid then we assume
//its a checkbox value and attempt to match up the model. This assumes the model will be expecting a dictionary to receive the key and
//boolean value and deals with several sets of checkboxes in the same page
//TODO: Model Validation - I don't think validation will be fired by this. Need to reapply model validation after properties have been set?
Dictionary<string, Dictionary<Guid, bool>> checkBoxItems = new Dictionary<string, Dictionary<Guid, bool>>();
foreach (var item in bindingContext.ValueProvider.Where(k => k.Key.Length > GuidLength))
{
Regex guidRegEx = new Regex(@"^(\{{0,1}([0-9a-fA-F]){8}-([0-9a-fA-F]){4}-([0-9a-fA-F]){4}-([0-9a-fA-F]){4}-([0-9a-fA-F]){12}\}{0,1})$");
if (guidRegEx.IsMatch(item.Key.Right(GuidLength)))
{
Guid entityKey = new Guid(item.Key.Right(GuidLength));
string modelKey = item.Key.Left(item.Key.Length - GuidLength);
Dictionary<Guid, bool> checkedValues = null;
if (!checkBoxItems.TryGetValue(modelKey, out checkedValues))
{
checkedValues = new Dictionary<Guid, bool>();
checkBoxItems.Add(modelKey, checkedValues);
}
//The assumption is that we will always get 1 or 2 values. 1 means the contents have not changed, 2 means the contents have changed
//and, so far, the first position has always contained the latest value
checkedValues.Add(entityKey, Convert.ToBoolean(((string[])item.Value.RawValue).First()));
}
}
foreach (var item in checkBoxItems)
{
PropertyInfo info = model.GetType().GetProperty(item.Key,
BindingFlags.IgnoreCase |
BindingFlags.Public |
BindingFlags.Instance);
info.SetValue(model, item.Value, null);
}