public override void SetValue(object component, object value)
{
if (component != null)
{
ISite site = GetSite(component);
IComponentChangeService changeService = null;
if (site != null)
{
changeService = (IComponentChangeService)site.GetService(typeof(IComponentChangeService));
}
// Raise the OnComponentChanging event
changeService.OnComponentChanging(component, this);
// Save the old value
object oldValue = GetValue(component);
try
{
WorkflowParameterBindingCollection parameters = GetParameters(component);
if (parameters != null)
{
if (value == null)
{
// Remove the binding from the ParameterBindings collection
parameters.Remove(this.Name);
}
else
{
// Add the binding to the ParameterBindings collection
WorkflowParameterBinding binding = null;
if (parameters.Contains(this.Name))
{
binding = parameters[this.Name];
}
else
{
binding = new WorkflowParameterBinding(this.Name);
parameters.Add(binding);
}
// Set the binding value on the ParameterBindings collection correspondent binding item
if (value is ActivityBind)
{
binding.SetBinding(WorkflowParameterBinding.ValueProperty, value as ActivityBind);
}
else
{
binding.SetValue(WorkflowParameterBinding.ValueProperty, value);
}
}
}
// Raise the OnValueChanged event
OnValueChanged(component, EventArgs.Empty);
}
catch (Exception)
{
value = oldValue;
throw;
}
finally
{
if (changeService != null)
{
// Raise the OnComponentChanged event
changeService.OnComponentChanged(component, this, oldValue, value);
}
}
}
}
