public static void SetPropertyValue(object ctrl, string propertyName, object value, params object[] args)
{
// The first thing we have to do is figure out if we can tell whether or
// not we're on the right thread. If we can't tell that, then this
// whole thing is useless.
bool needsInvoke = false;
object parent = ctrl;
// Get the object's Type.
Type objType = ctrl.GetType();
PropertyInfo piInvoke = null;
// Try and see if the passed object has a property called
// "InvokeRequired". Probably not, so...
if ((piInvoke = objType.GetProperty("InvokeRequired")) != null)
{
object retVal = piInvoke.GetValue(ctrl, null);
needsInvoke = (retVal == null || retVal.GetType().Name != "Boolean") ? false : (bool)retVal;
}
else if ((piInvoke = objType.GetProperty("Owner")) != null || (piInvoke = objType.GetProperty("Parent")) != null)
{
// If it doesn't have the "InvokeRequired" property, we check to
// see if it has a property named "Owner"
object owner = piInvoke.GetValue(ctrl, null);
if (owner != null)
{
// If it does, grab the owner and get it's Type.
Type ownType = owner.GetType();
// Now we'll check to see if the owner has an "InvokeRequired"
// property. This is the way ToolStripMenus and ToolBarMenus
// work.
PropertyInfo pOwn = ownType.GetProperty("InvokeRequired");
if (pOwn != null)
{
object retVal = pOwn.GetValue(owner, null);
needsInvoke = (retVal == null || retVal.GetType().Name != "Boolean") ? false : (bool)retVal;
// We have to remember which object defines our current
// thread context.
parent = owner;
}
}
}
else
{
// If none of that worked, then we can't figure it out, so just throw
// an error. Otherwise we'll end up triggering one by accident or
// in an infinate loop.
throw new ArgumentException("Cannot determine thread context from the given object.");
}
// If made it this far, we found some way to determine thread context, so
// now this starts to look a little more familiar.
if (needsInvoke)
{
// The 'parent' variable will be a reference to either the passed
// object or it's owner, if an "Owner" property was found. This,
// also, is for ToolStripMenus and ToolBarMenus. Individual
// ToolBarButtons and ToolStripMenuItems do not have "Invoke" or
// "BeginInvoke" methods. We have to call their owner's methods.
Type parType = parent.GetType();
Type[] paramTypes = new Type[] { typeof(Delegate), typeof(object[]) };
MethodInfo miInvoke = null;
// Create the delegate like normal;
SetObjectPropertyValueDelegate del = new SetObjectPropertyValueDelegate(CrossThreadUI.SetPropertyValue);
// Then try and find the "Invoke" or "BeginInvoke" method. If we
// don't find either, we have to throw an exception.
if (CrossThreadUI.ExecSync && ((miInvoke = parType.GetMethod("Invoke", paramTypes)) != null))
{
miInvoke.Invoke(parent, new object[] { del, new object[] { ctrl, propertyName, value, args } });
}
else if ((miInvoke = parType.GetMethod("BeginInvoke", paramTypes)) != null)
{
miInvoke.Invoke(parent, new object[] { del, new object[] { ctrl, propertyName, value, args } });
}
else
{
throw new ArgumentException("Specified object does not expose any default methods for invoking methods on its executing thread.");
}
}
else
{
// Now that we've determined thread context and decided we're on the
// correct thread, lets set the property value.
PropertyInfo pi = objType.GetProperty(propertyName, CrossThreadUI.Binding);
// Make sure the passed object's Type matches the property's Type.
if (pi.PropertyType != typeof(System.String) && !value.GetType().IsAssignableFrom(pi.PropertyType))
{
throw new ArgumentException("Value Type does not match property Type.", "value");
}
if (pi != null)
{
try
{ pi.SetValue(ctrl, ((pi.PropertyType.FullName == "System.String") ? value.ToString() : value), args); }
catch { throw; }
}
}
}
/// <summary>
/// Sets the specified property value on an object that does not inherit from System.Windows.Forms.Control. An exception will be thrown if the control
/// does not expose a property with the specified name or it has neither an 'InvokeRequired' property nor an 'Owner' or 'Parent' property with
/// an 'InvokeRequired' property.
/// </summary>
/// <param name="ctrl">The object instance whose property will be set.</param>
/// <param name="propertyName">The name of the Property member that will receive the new value.</param>
/// <param name="value">The value to assign to the property. This object must be properly typed to match the property's signature.</param>
/// <param name="args">Any optional arguments that must be provided to access this property. Array objects must be properly typed to match property's signature.</param>
public static void SetPropertyValue(object ctrl, string propertyName, object value, params object[] args)
{
// The first thing we have to do is figure out if we can tell whether or
// not we're on the right thread. If we can't tell that, then this
// whole thing is useless.
bool needsInvoke = false;
object parent = ctrl;
// Get the object's Type.
Type objType = ctrl.GetType();
PropertyInfo piInvoke = null;
// Try and see if the passed object has a property called
// "InvokeRequired". Probably not, so...
if ((piInvoke = objType.GetProperty("InvokeRequired")) != null)
{
object retVal = piInvoke.GetValue(ctrl, null);
needsInvoke = (retVal == null || retVal.GetType().Name != "Boolean") ? false : (bool)retVal;
}
else if ((piInvoke = objType.GetProperty("Owner")) != null || (piInvoke = objType.GetProperty("Parent")) != null)
{
// If it doesn't have the "InvokeRequired" property, we check to
// see if it has a property named "Owner"
object owner = piInvoke.GetValue(ctrl, null);
if (owner != null)
{
// If it does, grab the owner and get it's Type.
Type ownType = owner.GetType();
// Now we'll check to see if the owner has an "InvokeRequired"
// property. This is the way ToolStripMenus and ToolBarMenus
// work.
PropertyInfo pOwn = ownType.GetProperty("InvokeRequired");
if (pOwn != null)
{
object retVal = pOwn.GetValue(owner, null);
needsInvoke = (retVal == null || retVal.GetType().Name != "Boolean") ? false : (bool)retVal;
// We have to remember which object defines our current
// thread context.
parent = owner;
}
}
}
else
// If none of that worked, then we can't figure it out, so just throw
// an error. Otherwise we'll end up triggering one by accident or
// in an infinate loop.
throw new ArgumentException("Cannot determine thread context from the given object.");
// If made it this far, we found some way to determine thread context, so
// now this starts to look a little more familiar.
if (needsInvoke)
{
// The 'parent' variable will be a reference to either the passed
// object or it's owner, if an "Owner" property was found. This,
// also, is for ToolStripMenus and ToolBarMenus. Individual
// ToolBarButtons and ToolStripMenuItems do not have "Invoke" or
// "BeginInvoke" methods. We have to call their owner's methods.
Type parType = parent.GetType();
Type[] paramTypes = new Type[] { typeof(Delegate), typeof(object[]) };
MethodInfo miInvoke = null;
// Create the delegate like normal;
SetObjectPropertyValueDelegate del = new SetObjectPropertyValueDelegate(CrossThreadUI.SetPropertyValue);
// Then try and find the "Invoke" or "BeginInvoke" method. If we
// don't find either, we have to throw an exception.
if (CrossThreadUI.ExecSync && ((miInvoke = parType.GetMethod("Invoke", paramTypes)) != null))
miInvoke.Invoke(parent, new object[] { del, new object[] { ctrl, propertyName, value, args } });
else if ((miInvoke = parType.GetMethod("BeginInvoke", paramTypes)) != null)
miInvoke.Invoke(parent, new object[] { del, new object[] { ctrl, propertyName, value, args } });
else
throw new ArgumentException("Specified object does not expose any default methods for invoking methods on its executing thread.");
}
else
{
// Now that we've determined thread context and decided we're on the
// correct thread, lets set the property value.
PropertyInfo pi = objType.GetProperty(propertyName, CrossThreadUI.Binding);
// Make sure the passed object's Type matches the property's Type.
if (pi.PropertyType != typeof(System.String) && !value.GetType().IsAssignableFrom(pi.PropertyType))
throw new ArgumentException("Value Type does not match property Type.", "value");
if (pi != null)
try
{ pi.SetValue(ctrl, ((pi.PropertyType.FullName == "System.String") ? value.ToString() : value), args); }
catch { throw; }
}
}