I have a strange problem with reference and object cloning, which I'm not able to solve. I have a class MyClass which consist of property Name. I a开发者_如何学运维lso have my custon user control, which have a property of type MyClass - myclassproperty. These controls are placed on form. If I click one of control a new form apperas. I pass one argument to new form - myclassproperty
NewForm form = new NewForm(myusercontrol.myclassproperty)
this.myclassproperty = myclassproperty;
clonedproperty = ObjectCloner.Clone(myclassproperty);
clonedproperty is an cloned object. For cloning I use this code, which I found here on stackoverflow
public static class ObjectCloner
{
/// <summary>
/// Reference Article http://www.codeproject.com/KB/tips/SerializedObjectCloner.aspx
///
/// Provides a method for performing a deep copy of an object.
/// Binary Serialization is used to perform the copy.
/// </summary>
/// <summary>
/// Perform a deep Copy of the object.
/// </summary>
/// <typeparam name="T">The type of object being copied.</typeparam>
/// <param name="source">The object instance to copy.</param>
/// <returns>The copied object.</returns>
public static T Clone<T>(T source)
{
if (!typeof(T).IsSerializable)
{
throw new ArgumentException("The type must be serializable.", "source");
}
// Don't serialize a null object, simply return the default for that object
if (Object.ReferenceEquals(source, null))
{
return default(T);
}
IFormatter formatter = new BinaryFormatter();
Stream stream = new MemoryStream();
using (stream)
{
formatter.Serialize(stream, source);
stream.Seek(0, SeekOrigin.Begin);
return (T)formatter.Deserialize(stream);
}
}
}
}
In new form I have a textbox which is bind to filed Name in object clonedproperty
txtName.DataBindings.Add("Text", clonedproperty, "Name");
I also have two buttons on my form ''save'' and ''cancel''. If I click cancel, form simply is closed but if I click save I do sth like that
this.myclassproperty = clonedproperty
and the form is closed.
In my opinion, at this moment myusercontrol.myclassproperty is reference to clonedproperty so if I click once again on myusercontrol the new value (which I entered previously) shows.
However I have old value all the time :(
Without anything else to go on, I would say the form might be using the object and making the changes, and then getting cloned. Try cloning first then opening the form like this.
clonedproperty = ObjectCloner.Clone(myclassproperty); NewForm form = new NewForm(myusercontrol.myclassproperty) this.myclassproperty = myclassproperty;
If this doesn't work can you post the calling forms code?
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