protected virtual void LoadViewState(object savedState)
{
if (savedState != null)
{
object[] autoGenFieldStateArray = (object[])savedState;
int fieldCount = autoGenFieldStateArray.Length;
AutoGeneratedFieldProperties.Clear();
for (int i = 0; i < fieldCount; i++)
{
AutoGeneratedFieldProperties fieldProps = new AutoGeneratedFieldProperties();
((IStateManager)fieldProps).TrackViewState();
((IStateManager)fieldProps).LoadViewState(autoGenFieldStateArray[i]);
AutoGeneratedFieldProperties.Add(fieldProps);
}
}
}
public override List <AutoGeneratedField> CreateAutoGeneratedFields(object dataItem, Control control)
{
if (!(control is DetailsView))
{
throw new ArgumentException(SR.GetString(SR.InvalidDefaultAutoFieldGenerator, GetType().FullName, typeof(DetailsView).FullName));
}
DetailsView detailsView = control as DetailsView;
if (dataItem == null)
{
// note that we're not throwing an exception in this case, and the calling
// code should be able to handle a null arraylist being returned
return(null);
}
List <AutoGeneratedField> generatedFields = new List <AutoGeneratedField>();
PropertyDescriptorCollection propDescs = null;
bool throwException = true;
Type dataItemType = null;
//The base class ensures that the AutoGeneratedFieldProperties collection is reset before this method is called.
//However we are doing this again in here because we have another caller DetailsView.CreateAutoGeneratedRows which is
//not being used anywhere today but kept for backward compatibility.
if (AutoGeneratedFieldProperties.Count > 0)
{
AutoGeneratedFieldProperties.Clear();
}
if (dataItem != null)
{
dataItemType = dataItem.GetType();
}
if ((dataItem != null) && (dataItem is ICustomTypeDescriptor))
{
// Get the custom properties of the object
propDescs = TypeDescriptor.GetProperties(dataItem);
}
else if (dataItemType != null)
{
// directly bindable types: strings, ints etc. get treated specially, since we
// don't care about their properties, but rather we care about them directly
if (ShouldGenerateField(dataItemType, detailsView))
{
AutoGeneratedFieldProperties fieldProps = new AutoGeneratedFieldProperties();
((IStateManager)fieldProps).TrackViewState();
fieldProps.Name = "Item";
fieldProps.DataField = AutoGeneratedField.ThisExpression;
fieldProps.Type = dataItemType;
AutoGeneratedField field = CreateAutoGeneratedFieldFromFieldProperties(fieldProps);
if (field != null)
{
generatedFields.Add(field);
AutoGeneratedFieldProperties.Add(fieldProps);
}
}
else
{
// complex type... we get its properties
propDescs = TypeDescriptor.GetProperties(dataItemType);
}
}
if ((propDescs != null) && (propDescs.Count != 0))
{
string[] dataKeyNames = detailsView.DataKeyNames;
int keyNamesLength = dataKeyNames.Length;
string[] dataKeyNamesCaseInsensitive = new string[keyNamesLength];
for (int i = 0; i < keyNamesLength; i++)
{
dataKeyNamesCaseInsensitive[i] = dataKeyNames[i].ToLowerInvariant();
}
foreach (PropertyDescriptor pd in propDescs)
{
Type propertyType = pd.PropertyType;
if (ShouldGenerateField(propertyType, detailsView))
{
string name = pd.Name;
bool isKey = ((IList)dataKeyNamesCaseInsensitive).Contains(name.ToLowerInvariant());
AutoGeneratedFieldProperties fieldProps = new AutoGeneratedFieldProperties();
((IStateManager)fieldProps).TrackViewState();
fieldProps.Name = name;
fieldProps.IsReadOnly = isKey;
fieldProps.Type = propertyType;
fieldProps.DataField = name;
AutoGeneratedField field = CreateAutoGeneratedFieldFromFieldProperties(fieldProps);
if (field != null)
{
generatedFields.Add(field);
AutoGeneratedFieldProperties.Add(fieldProps);
}
}
}
}
if ((generatedFields.Count == 0) && throwException)
{
// this handles the case where we got back something that either had no
// properties, or all properties were not bindable.
throw new InvalidOperationException(SR.GetString(SR.DetailsView_NoAutoGenFields, detailsView.ID));
}
return(generatedFields);
}