Reflection with array

[Wernfried Schwenkner]

I want to deserialize a file. In one ofe my classes I have an array
like:

public class MyClass
{
public MyArray[] theArray;
}

i.e. an arry of an own defined class. While reading the file I only know
the dimension on the end of reading, so I keep the array elements in an
ArrayList "records". At the end I "only" have to assign the ArrayList to
the Array-field "theArray". And there is my problem.

arrayField.Fiel dType shows "MyArray[]", this is correct for me. If I try
with

arrayField.SetV alue(records.To Array(), instanceOfMyCla ss);

to assign the Array I get the error message that the objecttype can't be
converted to the destination type.
That's right, the object type is "object[]" and the destination type is
"MyArray[]".

How can I do the typecast at runtime?
Or is there another way to do this?

--
Sleepless in Berlin
Wernfried

[Stoitcho Goutsev \(100\) [C# MVP]]

Re: Reflection with array

Hi Wernfried,

Before digging more deeply into this.

Are you sure that the invalid cast is because of the arrays
[color=blue]
> arrayField.SetV alue(records.To Array(), instanceOfMyCla ss);[/color]

AFIK in FiledInfo.SetVa lue first comes the object which field you set and
then the value of the field. So I believe you should switch the paramers

arrayField.SetV alue(instanceOf MyClass, records.ToArray ());

Try that and tell if the probles is still there

--
HTH
Stoitcho Goutsev (100) [C# MVP]


"Wernfried Schwenkner" <wernfried.nosp am.schwenkner@s esa.de> wrote in
message news:ol1ebc.6hh .ln@news.bln.se sa.de...[color=blue]
> I want to deserialize a file. In one ofe my classes I have an array
> like:
>
> public class MyClass
> {
> public MyArray[] theArray;
> }
>
> i.e. an arry of an own defined class. While reading the file I only know
> the dimension on the end of reading, so I keep the array elements in an
> ArrayList "records". At the end I "only" have to assign the ArrayList to
> the Array-field "theArray". And there is my problem.
>
> arrayField.Fiel dType shows "MyArray[]", this is correct for me. If I try
> with
>
> arrayField.SetV alue(records.To Array(), instanceOfMyCla ss);
>
> to assign the Array I get the error message that the objecttype can't be
> converted to the destination type.
> That's right, the object type is "object[]" and the destination type is
> "MyArray[]".
>
> How can I do the typecast at runtime?
> Or is there another way to do this?
>
> --
> Sleepless in Berlin
> Wernfried[/color]

[Stoitcho Goutsev \(100\) [C# MVP]]

Re: Reflection with array

Hi Wernfried,

Before digging more deeply into this.

Are you sure that the invalid cast is because of the arrays
[color=blue]
> arrayField.SetV alue(records.To Array(), instanceOfMyCla ss);[/color]

AFIK in FiledInfo.SetVa lue first comes the object which field you set and
then the value of the field. So I believe you should switch the paramers

arrayField.SetV alue(instanceOf MyClass, records.ToArray ());

Try that and tell if the probles is still there

--
HTH
Stoitcho Goutsev (100) [C# MVP]


"Wernfried Schwenkner" <wernfried.nosp am.schwenkner@s esa.de> wrote in
message news:ol1ebc.6hh .ln@news.bln.se sa.de...[color=blue]
> I want to deserialize a file. In one ofe my classes I have an array
> like:
>
> public class MyClass
> {
> public MyArray[] theArray;
> }
>
> i.e. an arry of an own defined class. While reading the file I only know
> the dimension on the end of reading, so I keep the array elements in an
> ArrayList "records". At the end I "only" have to assign the ArrayList to
> the Array-field "theArray". And there is my problem.
>
> arrayField.Fiel dType shows "MyArray[]", this is correct for me. If I try
> with
>
> arrayField.SetV alue(records.To Array(), instanceOfMyCla ss);
>
> to assign the Array I get the error message that the objecttype can't be
> converted to the destination type.
> That's right, the object type is "object[]" and the destination type is
> "MyArray[]".
>
> How can I do the typecast at runtime?
> Or is there another way to do this?
>
> --
> Sleepless in Berlin
> Wernfried[/color]

[Wernfried Schwenkner]

Re: Reflection with array

In article <uwq4ITfWEHA.25 20@TK2MSFTNGP12 .phx.gbl>, 100@100.com says...
[color=blue]
>
> arrayField.SetV alue(instanceOf MyClass, records.ToArray ());
>
> Try that and tell if the probles is still there
>[/color]
Thanks. This was the problem. I certainly got confused with my variabale
names and missed the order.

--
Sleepless in Berlin
Wernfried

[Wernfried Schwenkner]

Re: Reflection with array

In article <uwq4ITfWEHA.25 20@TK2MSFTNGP12 .phx.gbl>, 100@100.com says...
[color=blue]
>
> arrayField.SetV alue(instanceOf MyClass, records.ToArray ());
>
> Try that and tell if the probles is still there
>[/color]
Thanks. This was the problem. I certainly got confused with my variabale
names and missed the order.

--
Sleepless in Berlin
Wernfried