/// <include file='doc\BindingContext.uex' path='docs/doc[@for="BindingContext.EnsureListManager"]/*' />
/// <devdoc>
/// Create a suitable binding manager for the specified dataSource/dataMember combination.
/// - If one has already been created and cached by this BindingContext, return that instead.
/// - If the data source is an ICurrencyManagerProvider, just delegate to the data source.
/// </devdoc>
internal BindingManagerBase EnsureListManager(object dataSource, string dataMember)
{
BindingManagerBase bindingManagerBase = null;
if (dataMember == null)
{
dataMember = "";
}
// Check whether data source wants to provide its own binding managers
// (but fall through to old logic if it fails to provide us with one)
//
if (dataSource is ICurrencyManagerProvider)
{
bindingManagerBase = (dataSource as ICurrencyManagerProvider).GetRelatedCurrencyManager(dataMember);
if (bindingManagerBase != null)
{
return(bindingManagerBase);
}
}
// Check for previously created binding manager
//
HashKey key = GetKey(dataSource, dataMember);
WeakReference wRef;
wRef = listManagers[key] as WeakReference;
if (wRef != null)
{
bindingManagerBase = (BindingManagerBase)wRef.Target;
}
if (bindingManagerBase != null)
{
return(bindingManagerBase);
}
if (dataMember.Length == 0)
{
// No data member specified, so create binding manager directly on the data source
//
if (dataSource is IList || dataSource is IListSource)
{
// IListSource so we can bind the dataGrid to a table and a dataSet
bindingManagerBase = new CurrencyManager(dataSource);
}
else
{
// Otherwise assume simple property binding
bindingManagerBase = new PropertyManager(dataSource);
}
}
else
{
// Data member specified, so get data source's binding manager, and hook a 'related' binding manager to it
//
int lastDot = dataMember.LastIndexOf(".");
string dataPath = (lastDot == -1) ? "" : dataMember.Substring(0, lastDot);
string dataField = dataMember.Substring(lastDot + 1);
BindingManagerBase formerManager = EnsureListManager(dataSource, dataPath);
PropertyDescriptor prop = formerManager.GetItemProperties().Find(dataField, true);
if (prop == null)
{
throw new ArgumentException(string.Format(SR.RelatedListManagerChild, dataField));
}
if (typeof(IList).IsAssignableFrom(prop.PropertyType))
{
bindingManagerBase = new RelatedCurrencyManager(formerManager, dataField);
}
else
{
bindingManagerBase = new RelatedPropertyManager(formerManager, dataField);
}
}
// if wRef == null, then it is the first time we want this bindingManagerBase: so add it
// if wRef != null, then the bindingManagerBase was GC'ed at some point: keep the old wRef and change its target
if (wRef == null)
{
listManagers.Add(key, new WeakReference(bindingManagerBase, false));
}
else
{
wRef.Target = bindingManagerBase;
}
IntSecurity.UnmanagedCode.Demand();
ScrubWeakRefs();
// Return the final binding manager
return(bindingManagerBase);
}
internal BindingManagerBase EnsureListManager(object dataSource, string dataMember)
{
BindingManagerBase target = null;
if (dataMember == null)
{
dataMember = "";
}
if (dataSource is ICurrencyManagerProvider)
{
target = (dataSource as ICurrencyManagerProvider).GetRelatedCurrencyManager(dataMember);
if (target != null)
{
return(target);
}
}
HashKey key = this.GetKey(dataSource, dataMember);
WeakReference reference = this.listManagers[key] as WeakReference;
if (reference != null)
{
target = (BindingManagerBase)reference.Target;
}
if (target == null)
{
if (dataMember.Length == 0)
{
if ((dataSource is IList) || (dataSource is IListSource))
{
target = new CurrencyManager(dataSource);
}
else
{
target = new PropertyManager(dataSource);
}
}
else
{
int length = dataMember.LastIndexOf(".");
string str = (length == -1) ? "" : dataMember.Substring(0, length);
string name = dataMember.Substring(length + 1);
BindingManagerBase parentManager = this.EnsureListManager(dataSource, str);
PropertyDescriptor descriptor = parentManager.GetItemProperties().Find(name, true);
if (descriptor == null)
{
throw new ArgumentException(System.Windows.Forms.SR.GetString("RelatedListManagerChild", new object[] { name }));
}
if (typeof(IList).IsAssignableFrom(descriptor.PropertyType))
{
target = new RelatedCurrencyManager(parentManager, name);
}
else
{
target = new RelatedPropertyManager(parentManager, name);
}
}
if (reference == null)
{
this.listManagers.Add(key, new WeakReference(target, false));
return(target);
}
reference.Target = target;
}
return(target);
}
internal BindingManagerBase EnsureListManager(object dataSource, string dataMember)
{
if (dataMember == null)
{
dataMember = "";
}
HashKey key = GetKey(dataSource, dataMember);
WeakReference wRef;
BindingManagerBase bindingManagerBase = null;
wRef = listManagers[key] as WeakReference;
if (wRef != null)
{
bindingManagerBase = (BindingManagerBase)wRef.Target;
}
if (bindingManagerBase != null)
{
return(bindingManagerBase);
}
// create base listManager.
if (dataMember.Length == 0)
{
//IListSource so we can bind the dataGrid to a table and a dataSet
if (dataSource is IList || dataSource is IListSource)
{
bindingManagerBase = new CurrencyManager(dataSource);
}
else
{
bindingManagerBase = new PropertyManager(dataSource);
}
// if wRef == null, then it is the first time we want this bindingManagerBase: so add it
// if wRef != null, then the bindingManagerBase was GC'ed at some point: keep the old wRef and change its target
if (wRef == null)
{
listManagers.Add(key, new WeakReference(bindingManagerBase, false));
}
else
{
wRef.Target = bindingManagerBase;
}
return(bindingManagerBase);
}
// handle relation.
int lastDot = dataMember.LastIndexOf(".");
BindingManagerBase formerManager = EnsureListManager(dataSource, lastDot == -1 ? "" : dataMember.Substring(0, lastDot));
PropertyDescriptor prop = formerManager.GetItemProperties().Find(dataMember.Substring(lastDot + 1), true);
if (prop == null)
{
throw new ArgumentException(SR.GetString(SR.RelatedListManagerChild, dataMember.Substring(lastDot + 1)));
}
if (typeof(IList).IsAssignableFrom(prop.PropertyType))
{
bindingManagerBase = new RelatedCurrencyManager(formerManager, dataMember.Substring(lastDot + 1));
}
else
{
bindingManagerBase = new RelatedPropertyManager(formerManager, dataMember.Substring(lastDot + 1));
}
// if wRef == null, then it is the first time we want this bindingManagerBase: so add it
// if wRef != null, then the bindingManagerBase was GC'ed at some point: keep the old wRef and change its target
if (wRef == null)
{
listManagers.Add(GetKey(dataSource, dataMember), new WeakReference(bindingManagerBase, false));
}
else
{
wRef.Target = bindingManagerBase;
}
return(bindingManagerBase);
}
/// <include file='doc\BindingContext.uex' path='docs/doc[@for="BindingContext.EnsureListManager"]/*' />
/// <devdoc>
/// Create a suitable binding manager for the specified dataSource/dataMember combination.
/// - If one has already been created and cached by this BindingContext, return that instead.
/// - If the data source is an ICurrencyManagerProvider, just delegate to the data source.
/// </devdoc>
internal BindingManagerBase EnsureListManager(object dataSource, string dataMember) {
BindingManagerBase bindingManagerBase = null;
if (dataMember == null)
dataMember = "";
// Check whether data source wants to provide its own binding managers
// (but fall through to old logic if it fails to provide us with one)
//
if (dataSource is ICurrencyManagerProvider) {
bindingManagerBase = (dataSource as ICurrencyManagerProvider).GetRelatedCurrencyManager(dataMember);
if (bindingManagerBase != null) {
return bindingManagerBase;
}
}
// Check for previously created binding manager
//
HashKey key = GetKey(dataSource, dataMember);
WeakReference wRef;
wRef = listManagers[key] as WeakReference;
if (wRef != null)
bindingManagerBase = (BindingManagerBase) wRef.Target;
if (bindingManagerBase != null) {
return bindingManagerBase;
}
if (dataMember.Length == 0) {
// No data member specified, so create binding manager directly on the data source
//
if (dataSource is IList || dataSource is IListSource) {
// IListSource so we can bind the dataGrid to a table and a dataSet
bindingManagerBase = new CurrencyManager(dataSource);
}
else {
// Otherwise assume simple property binding
bindingManagerBase = new PropertyManager(dataSource);
}
}
else {
// Data member specified, so get data source's binding manager, and hook a 'related' binding manager to it
//
int lastDot = dataMember.LastIndexOf(".");
string dataPath = (lastDot == -1) ? "" : dataMember.Substring(0, lastDot);
string dataField = dataMember.Substring(lastDot + 1);
BindingManagerBase formerManager = EnsureListManager(dataSource, dataPath);
PropertyDescriptor prop = formerManager.GetItemProperties().Find(dataField, true);
if (prop == null)
throw new ArgumentException(SR.GetString(SR.RelatedListManagerChild, dataField));
if (typeof(IList).IsAssignableFrom(prop.PropertyType))
bindingManagerBase = new RelatedCurrencyManager(formerManager, dataField);
else
bindingManagerBase = new RelatedPropertyManager(formerManager, dataField);
}
// if wRef == null, then it is the first time we want this bindingManagerBase: so add it
// if wRef != null, then the bindingManagerBase was GC'ed at some point: keep the old wRef and change its target
if (wRef == null)
listManagers.Add(key, new WeakReference(bindingManagerBase, false));
else
wRef.Target = bindingManagerBase;
IntSecurity.UnmanagedCode.Demand();
ScrubWeakRefs();
// Return the final binding manager
return bindingManagerBase;
}
internal BindingManagerBase EnsureListManager(object dataSource, string dataMember)
{
BindingManagerBase target = null;
if (dataMember == null)
{
dataMember = "";
}
if (dataSource is ICurrencyManagerProvider)
{
target = (dataSource as ICurrencyManagerProvider).GetRelatedCurrencyManager(dataMember);
if (target != null)
{
return target;
}
}
HashKey key = this.GetKey(dataSource, dataMember);
WeakReference reference = this.listManagers[key] as WeakReference;
if (reference != null)
{
target = (BindingManagerBase) reference.Target;
}
if (target == null)
{
if (dataMember.Length == 0)
{
if ((dataSource is IList) || (dataSource is IListSource))
{
target = new CurrencyManager(dataSource);
}
else
{
target = new PropertyManager(dataSource);
}
}
else
{
int length = dataMember.LastIndexOf(".");
string str = (length == -1) ? "" : dataMember.Substring(0, length);
string name = dataMember.Substring(length + 1);
BindingManagerBase parentManager = this.EnsureListManager(dataSource, str);
PropertyDescriptor descriptor = parentManager.GetItemProperties().Find(name, true);
if (descriptor == null)
{
throw new ArgumentException(System.Windows.Forms.SR.GetString("RelatedListManagerChild", new object[] { name }));
}
if (typeof(IList).IsAssignableFrom(descriptor.PropertyType))
{
target = new RelatedCurrencyManager(parentManager, name);
}
else
{
target = new RelatedPropertyManager(parentManager, name);
}
}
if (reference == null)
{
this.listManagers.Add(key, new WeakReference(target, false));
return target;
}
reference.Target = target;
}
return target;
}
