Serialize/DeSerialize Generics List

[Joe]

Hi

I have a Generics List in a PropertyGrid

I am able to Serialize it to XML but when I try to deserialize back to the
class of the PropertyGrid
The Constructor doesn't seem to fire to reload the saved settings

Can anyone see something that I have missed ?

Class of values
----------------
[XmlRoot("ValueS tring")]

public class ValueString

{

private string upper = "uppervalue ";

private string lower = "lowervalue ";

public ValueString()

{

}

public ValueString(str ing sUpper, string sLower)

{

upper = sUpper

lower = sLower;

}

[XmlElement("Upp er")]

public string Upper

{

get { return upper; }

set { upper = value; }

}

[XmlElement("Low er")]

public string Lower

{

get { return lower; }

set { lower = value; }

}

}



PropertGrid Class

----------------

private List<ValueStrin gmyValues = new List<ValueStrin g>();

myValues.Add("u pper1","lower1" );

myValues.Add("u pper2","lower2" );



[Category("Misc" )]

[Browsable(false )]

[XmlArrayItem("V alArray")]

public List<ValueStrin gValuesStr

{

get

{

return myValues

}

set

{

myValues = value;


}

}





xml serialized from Class

-----



<ValuesStr>
<ValArray>
<Upper>upper1 </Upper>
<Lower>lower1 </Lower>
</ValArray>
<ValArray>
<Upper>upper2 </Upper>
<Lower>lower2 </Lower>
</ValArray>
</ValuesStr>

[Martin Z]

Re: Serialize/DeSerialize Generics List

AFAIK, the way that the deserialize operation of XML Arrays works is
that it constructs an array object (not a List<>) from scratch and
assigns it - meanwhile deserialization requires only an IEnumerable.
Your List<works fine for deserializing since it's an IEnumerable, bu
not the other way because it's not an Array.

I might be wrong about this - but that's just he behaviour I'm
observing. Perhaps providing a public Array-based property that is
converted to-and-from your hidden List property (converting from lists
to arrays and vice versa is pretty simple) - then just serialize your
Array.

Joe wrote:

Hi
>
I have a Generics List in a PropertyGrid
>
I am able to Serialize it to XML but when I try to deserialize back to the
class of the PropertyGrid
The Constructor doesn't seem to fire to reload the saved settings
>
Can anyone see something that I have missed ?
>
Class of values
----------------
[XmlRoot("ValueS tring")]
>
public class ValueString
>
{
>
private string upper = "uppervalue ";
>
private string lower = "lowervalue ";
>
public ValueString()
>
{
>
}
>
public ValueString(str ing sUpper, string sLower)
>
{
>
upper = sUpper
>
lower = sLower;
>
}
>
[XmlElement("Upp er")]
>
public string Upper
>
{
>
get { return upper; }
>
set { upper = value; }
>
}
>
[XmlElement("Low er")]
>
public string Lower
>
{
>
get { return lower; }
>
set { lower = value; }
>
}
>
}
>
>
>
PropertGrid Class
>
----------------
>
private List<ValueStrin gmyValues = new List<ValueStrin g>();
>
myValues.Add("u pper1","lower1" );
>
myValues.Add("u pper2","lower2" );
>
>
>
[Category("Misc" )]
>
[Browsable(false )]
>
[XmlArrayItem("V alArray")]
>
public List<ValueStrin gValuesStr
>
{
>
get
>
{
>
return myValues
>
}
>
set
>
{
>
myValues = value;
>
>
}
>
}
>
>
>
>
>
xml serialized from Class
>
-----
>
>
>
<ValuesStr>
<ValArray>
<Upper>upper1 </Upper>
<Lower>lower1 </Lower>
</ValArray>
<ValArray>
<Upper>upper2 </Upper>
<Lower>lower2 </Lower>
</ValArray>
</ValuesStr>

[Martin Z]

Re: Serialize/DeSerialize Generics List

Ick, a bit of a brain fart there: I said "Deserializ e" when I meant
"Serialize" a bunch of times. Serialize from IEnumerable, deserialize
from Array.

from

http://msdn2.microsoft.com/en-us/library/system.xml.serialization.xmlattributes.xmlarray.aspx

"""Gets or sets an object that specifies how the XmlSerializer
serializes a public field or read/write property that returns an
*array*. """ (emph. mine).


Martin Z wrote:

AFAIK, the way that the deserialize operation of XML Arrays works is
that it constructs an array object (not a List<>) from scratch and
assigns it - meanwhile deserialization requires only an IEnumerable.
Your List<works fine for deserializing since it's an IEnumerable, bu
not the other way because it's not an Array.
>
I might be wrong about this - but that's just he behaviour I'm
observing. Perhaps providing a public Array-based property that is
converted to-and-from your hidden List property (converting from lists
to arrays and vice versa is pretty simple) - then just serialize your
Array.
>
Joe wrote:

Hi

I have a Generics List in a PropertyGrid

I am able to Serialize it to XML but when I try to deserialize back to the
class of the PropertyGrid
The Constructor doesn't seem to fire to reload the saved settings

Can anyone see something that I have missed ?

Class of values
----------------
[XmlRoot("ValueS tring")]

public class ValueString

{

private string upper = "uppervalue ";

private string lower = "lowervalue ";

public ValueString()

{

}

public ValueString(str ing sUpper, string sLower)

{

upper = sUpper

lower = sLower;

}

[XmlElement("Upp er")]

public string Upper

{

get { return upper; }

set { upper = value; }

}

[XmlElement("Low er")]

public string Lower

{

get { return lower; }

set { lower = value; }

}

}



PropertGrid Class

----------------

private List<ValueStrin gmyValues = new List<ValueStrin g>();

myValues.Add("u pper1","lower1" );

myValues.Add("u pper2","lower2" );



[Category("Misc" )]

[Browsable(false )]

[XmlArrayItem("V alArray")]

public List<ValueStrin gValuesStr

{

get

{

return myValues

}

set

{

myValues = value;


}

}





xml serialized from Class

-----



<ValuesStr>
<ValArray>
<Upper>upper1 </Upper>
<Lower>lower1 </Lower>
</ValArray>
<ValArray>
<Upper>upper2 </Upper>
<Lower>lower2 </Lower>
</ValArray>
</ValuesStr>