|
Lightstreamer PCL (Portable Class Libraries) Client 3.0.0
|
   |
   |
IUpdateInfo.IsValueChanged Method (string)
|
Lightstreamer PCL (Portable Class Libraries) Client 3.0.0
|
|
|
Asks whether the value for a field has changed after the reception of this update. For the first update for the item, it always returns true.
If the "COMMAND logic" behaviour is enabled, then the change is meant as relative to the same key; as a consequence, on ADD commands the method always returns true; moreover, on DELETE commands the method returns true for all fields, but for the "key" field.
bool IsValueChanged(string fieldName);
bool IsValueChanged(string fieldName);
Function IsValueChanged(fieldName As string) As bool
|
Parameters |
Description |
|
string fieldName |
a field name. |
true if the updated value is different than the previous one, according to the above specifications.
|
Exceptions |
Description |
|
ArgumentException |
the specified field name does not represent a subscribed field; also thrown if a SimpleTableInfo was used to describe the related table. |