c# Setting / Getting properties of controls to / from another thread - multithreading

Question

I have this code for setting controls parameter to another thread:
private delegate void SetPropertySafeDelegate<TResult>(System.Windows.Forms.Control #this, Expression<Func<TResult>> property, TResult value);
public static void SetProperty<TResult>(this System.Windows.Forms.Control #this, Expression<Func<TResult>> property, TResult value)
{
var propertyInfo = (property.Body as MemberExpression).Member as PropertyInfo;
if (propertyInfo == null || !#this.GetType().IsSubclassOf(propertyInfo.ReflectedType) || #this.GetType().GetProperty(propertyInfo.Name, propertyInfo.PropertyType) == null)
{
throw new ArgumentException("The lambda expression 'property' must reference a valid property on this Control.");
}
if (#this.InvokeRequired)
{
#this.Invoke(new SetPropertySafeDelegate<TResult>(SetProperty), new object[] { #this, property, value });
}
else
{
#this.GetType().InvokeMember(propertyInfo.Name, BindingFlags.SetProperty, null, #this, new object[] { value });
}
}
it works like this:
label1.SetProperty(() => label1.Text, "xxx");
but I need it to work also on other things, such as:
checkBox4.SetProperty(() => checkBox4.Checked, true);
which doesn't work.
The second thing I need is the same function for getting control value.
Thanks a lot for your advice.

Answer 1

The solution which works for me:
/// <summary>
/// Gets control property. Usage: label1.GetProperty2(() => label1.Text);
/// </summary>
public static object GetProperty2<TResult>(this Control #this, Expression<Func<TResult>> property)
{
var propertyInfo = (property.Body as MemberExpression).Member as PropertyInfo;
return #this.GetType().GetProperty(propertyInfo.Name, propertyInfo.PropertyType).GetValue(#this, null);
}
/// <summary>
/// Sets control property. Usage: label1.SetProperty2(() => label1.Text, "Zadej cestu k modelu.");
/// </summary>
public static void SetProperty2<TResult>(this Control #this, Expression<Func<TResult>> property, TResult value)
{
var propertyInfo = (property.Body as MemberExpression).Member as PropertyInfo;
if (#this.InvokeRequired)
{
#this.Invoke(new SetPropertySafeDelegate<TResult>(SetProperty2), new object[] { #this, property, value });
}
else
{
#this.GetType().InvokeMember(propertyInfo.Name, BindingFlags.SetProperty, null, #this, new object[] { value });
}
}
private delegate void SetPropertySafeDelegate<TResult>(Control #this, Expression<Func<TResult>> property, TResult value);