I am trying to use reflection to access the private property of
OpenFileDialog fileNames property. I have the following code :
filedlg.Initial Directory = directory.Text;
filedlg.Filter = "xml files (*.xml)|*.xml" ;
filedlg.FileNam e = "*.xml";
filedlg.Validat eNames = false;
if (filedlg.ShowDi alog() == DialogResult.Ca ncel)
return;
Type t = filedlg.GetType ();
PropertyInfo rowsPropertyInf o = t.GetProperty(" fileNames",
BindingFlags.In stance |
BindingFlags.St atic |
BindingFlags.Ge tProperty |
BindingFlags.Pu blic |
BindingFlags.No nPublic|
BindingFlags.Su ppressChangeTyp e);
object[] o = (object[])rowsPropertyIn fo.GetValue(fil edlg,
BindingFlags.In stance |
BindingFlags.St atic |
BindingFlags.Ge tProperty |
BindingFlags.Pu blic |
BindingFlags.No nPublic|
BindingFlags.Su ppressChangeTyp e,
null, null, null);
I got an error :
An unhandled exception of type 'System.NullRef erenceException ' occurred in
BGReport.exe
Additional information: Object reference not set to an instance of an
object.
Any idea ? Thanks. 9 6244
QQ <an*******@disc ussions.microso ft.com> wrote: I am trying to use reflection to access the private property of OpenFileDialog fileNames property. I have the following code :
<snip>
Please see my response to the same question you asked half an hour ago,
and read http://www.pobox.com/~skeet/csharp/faq/posting.html
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
Hi,
Wrong text case on property name.
Use "FileNames" , and not "fileNames" .
cu
Adnan
"QQ" <an*******@disc ussions.microso ft.com> wrote in message news:OD******** ******@TK2MSFTN GP11.phx.gbl...
I am trying to use reflection to access the private property of
OpenFileDialog fileNames property. I have the following code :
filedlg.Initial Directory = directory.Text;
filedlg.Filter = "xml files (*.xml)|*.xml" ;
filedlg.FileNam e = "*.xml";
filedlg.Validat eNames = false;
if (filedlg.ShowDi alog() == DialogResult.Ca ncel)
return;
Type t = filedlg.GetType ();
PropertyInfo rowsPropertyInf o = t.GetProperty(" fileNames",
BindingFlags.In stance |
BindingFlags.St atic |
BindingFlags.Ge tProperty |
BindingFlags.Pu blic |
BindingFlags.No nPublic|
BindingFlags.Su ppressChangeTyp e);
object[] o = (object[])rowsPropertyIn fo.GetValue(fil edlg,
BindingFlags.In stance |
BindingFlags.St atic |
BindingFlags.Ge tProperty |
BindingFlags.Pu blic |
BindingFlags.No nPublic|
BindingFlags.Su ppressChangeTyp e,
null, null, null);
I got an error :
An unhandled exception of type 'System.NullRef erenceException ' occurred in
BGReport.exe
Additional information: Object reference not set to an instance of an
object.
Any idea ? Thanks.
Hi,
Wrong text case on property name.
Use "FileNames" , and not "fileNames" .
cu
Adnan
"QQ" <an*******@disc ussions.microso ft.com> wrote in message news:OD******** ******@TK2MSFTN GP11.phx.gbl...
I am trying to use reflection to access the private property of
OpenFileDialog fileNames property. I have the following code :
filedlg.Initial Directory = directory.Text;
filedlg.Filter = "xml files (*.xml)|*.xml" ;
filedlg.FileNam e = "*.xml";
filedlg.Validat eNames = false;
if (filedlg.ShowDi alog() == DialogResult.Ca ncel)
return;
Type t = filedlg.GetType ();
PropertyInfo rowsPropertyInf o = t.GetProperty(" fileNames",
BindingFlags.In stance |
BindingFlags.St atic |
BindingFlags.Ge tProperty |
BindingFlags.Pu blic |
BindingFlags.No nPublic|
BindingFlags.Su ppressChangeTyp e);
object[] o = (object[])rowsPropertyIn fo.GetValue(fil edlg,
BindingFlags.In stance |
BindingFlags.St atic |
BindingFlags.Ge tProperty |
BindingFlags.Pu blic |
BindingFlags.No nPublic|
BindingFlags.Su ppressChangeTyp e,
null, null, null);
I got an error :
An unhandled exception of type 'System.NullRef erenceException ' occurred in
BGReport.exe
Additional information: Object reference not set to an instance of an
object.
Any idea ? Thanks.
hi,
"fileNames" is actually a private field not
property. if you are referring to property, it should
be "FileNames" . if you are trying to get the value of
private field, this sample by theory should work:
using System;
using System.Collecti ons;
using System.Windows. Forms;
using System.Reflecti on;
public class MyClass : System.Windows. Forms.Form
{
private Button btn;
public static void Main()
{
Application.Run (new MyClass());
}
public MyClass()
{
btn = new Button();
btn.Click += new EventHandler(On Click);
btn.Text = "Click";
this.Controls.A dd(btn);
}
private static void OnClick(object sender,
EventArgs e)
{
MyClass2 c2 = new MyClass2();
FieldInfo field = c2.GetType().Ge tField
("field1", BindingFlags.In stance |
BindingFlags.No nPublic );
if (field!=null)
MessageBox.Show (field.GetValue
(c2).ToString() );
else
MessageBox.Show ("null");
}
}
public class MyClass2
{
private string field1 = "gani";
}
but unfortunately, i can't get the "fileNames" private
field of OpenFileDialog.
HTH,
gani http://thedeveloperscorner.com.ph -----Original Message----- QQ <an*******@disc ussions.microso ft.com> wrote: I am trying to use reflection to access the private
property of OpenFileDialog fileNames property. I have the
following code : <snip>
Please see my response to the same question you asked
half an hour ago,and read
http://www.pobox.com/~skeet/csharp/faq/posting.html -- Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet If replying to the group, please do not mail me too .
I tried it but failed.
<an*******@disc ussions.microso ft.com> wrote in message
news:18******** *************** ******@phx.gbl. .. hi,
"fileNames" is actually a private field not property. if you are referring to property, it should be "FileNames" . if you are trying to get the value of private field, this sample by theory should work:
using System; using System.Collecti ons; using System.Windows. Forms; using System.Reflecti on;
public class MyClass : System.Windows. Forms.Form { private Button btn;
public static void Main() { Application.Run (new MyClass()); }
public MyClass() { btn = new Button(); btn.Click += new EventHandler(On Click); btn.Text = "Click"; this.Controls.A dd(btn); }
private static void OnClick(object sender, EventArgs e) { MyClass2 c2 = new MyClass2(); FieldInfo field = c2.GetType().Ge tField ("field1", BindingFlags.In stance | BindingFlags.No nPublic ); if (field!=null) MessageBox.Show (field.GetValue (c2).ToString() ); else MessageBox.Show ("null"); } }
public class MyClass2 { private string field1 = "gani"; }
but unfortunately, i can't get the "fileNames" private field of OpenFileDialog.
HTH,
gani http://thedeveloperscorner.com.ph
-----Original Message----- QQ <an*******@disc ussions.microso ft.com> wrote: I am trying to use reflection to access the private property of OpenFileDialog fileNames property. I have the following code : <snip>
Please see my response to the same question you asked
half an hour ago,and read http://www.pobox.com/~skeet/csharp/faq/posting.html -- Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet If replying to the group, please do not mail me too .
I m accessing the private property of OpenFileDialog. So it is the correct
field (fileNames).
"adnan boz" <ab*********@ho tmail.com> wrote in message
news:#c******** ******@TK2MSFTN GP09.phx.gbl...
Hi,
Wrong text case on property name.
Use "FileNames" , and not "fileNames" .
cu
Adnan
"QQ" <an*******@disc ussions.microso ft.com> wrote in message
news:OD******** ******@TK2MSFTN GP11.phx.gbl...
I am trying to use reflection to access the private property of
OpenFileDialog fileNames property. I have the following code :
filedlg.Initial Directory = directory.Text;
filedlg.Filter = "xml files (*.xml)|*.xml" ;
filedlg.FileNam e = "*.xml";
filedlg.Validat eNames = false;
if (filedlg.ShowDi alog() == DialogResult.Ca ncel)
return;
Type t = filedlg.GetType ();
PropertyInfo rowsPropertyInf o = t.GetProperty(" fileNames",
BindingFlags.In stance |
BindingFlags.St atic |
BindingFlags.Ge tProperty |
BindingFlags.Pu blic |
BindingFlags.No nPublic|
BindingFlags.Su ppressChangeTyp e);
object[] o = (object[])rowsPropertyIn fo.GetValue(fil edlg,
BindingFlags.In stance |
BindingFlags.St atic |
BindingFlags.Ge tProperty |
BindingFlags.Pu blic |
BindingFlags.No nPublic|
BindingFlags.Su ppressChangeTyp e,
null, null, null);
I got an error :
An unhandled exception of type 'System.NullRef erenceException ' occurred in
BGReport.exe
Additional information: Object reference not set to an instance of an
object.
Any idea ? Thanks.
QQ <an*******@disc ussions.microso ft.com> wrote: I m accessing the private property of OpenFileDialog. So it is the correct field (fileNames).
Hang on - is it a field or a property? The two are very different.
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
Hi,
Right, it is inaccessable.
So, you don't have the ReflectionPermi ssion. As described on
msdn(Type.GetPr operty Method (String, BindingFlags): If the requested type
is non-public and the caller does not have ReflectionPermi ssion to reflect
non-public objects outside the current assembly, this method returns a null
reference (Nothing in Visual Basic).)
But, why do you need the private fileNames?
So far I could examine, public FileNames returns the same thing,
except it uses FileIOPermissio n on every fileName clone.
Adnan
"QQ" <an*******@disc ussions.microso ft.com> wrote in message
news:uo******** ******@TK2MSFTN GP09.phx.gbl...
I m accessing the private property of OpenFileDialog. So it is the correct
field (fileNames).
"adnan boz" <ab*********@ho tmail.com> wrote in message
news:#c******** ******@TK2MSFTN GP09.phx.gbl...
Hi,
Wrong text case on property name.
Use "FileNames" , and not "fileNames" .
cu
Adnan
"QQ" <an*******@disc ussions.microso ft.com> wrote in message
news:OD******** ******@TK2MSFTN GP11.phx.gbl...
I am trying to use reflection to access the private property of
OpenFileDialog fileNames property. I have the following code :
filedlg.Initial Directory = directory.Text;
filedlg.Filter = "xml files (*.xml)|*.xml" ;
filedlg.FileNam e = "*.xml";
filedlg.Validat eNames = false;
if (filedlg.ShowDi alog() == DialogResult.Ca ncel)
return;
Type t = filedlg.GetType ();
PropertyInfo rowsPropertyInf o = t.GetProperty(" fileNames",
BindingFlags.In stance |
BindingFlags.St atic |
BindingFlags.Ge tProperty |
BindingFlags.Pu blic |
BindingFlags.No nPublic|
BindingFlags.Su ppressChangeTyp e);
object[] o = (object[])rowsPropertyIn fo.GetValue(fil edlg,
BindingFlags.In stance |
BindingFlags.St atic |
BindingFlags.Ge tProperty |
BindingFlags.Pu blic |
BindingFlags.No nPublic|
BindingFlags.Su ppressChangeTyp e,
null, null, null);
I got an error :
An unhandled exception of type 'System.NullRef erenceException ' occurred in
BGReport.exe
Additional information: Object reference not set to an instance of an
object.
Any idea ? Thanks.
Reason is :
I have the following code :
OpenFileDialog filedlg = new OpenFileDialog( );
filedlg.Initial Directory = directory.Text;
filedlg.Filter = "lvl files (*.lvl)|*.lvl" ;
filedlg.FileNam e = "*.lvl";
filedlg.Validat eNames = false;
if (filedlg.ShowDi alog() == DialogResult.Ca ncel)
return;
string dirname = Path.GetDirecto ryName(filedlg. FileName);
I set the property ValidateNames to false. I didn't select any file when
the dialog box pop-ups. When I click the "Open" button, the dialog box was
closed. The problem is filedlg.FileNam e doesn't not contain anything. I
expect it to have something like this c:\Test\*.lvl (with Win32
OpenFileDialog, it will). The protected member of OpenFileDialog namely
fileNames and FileNameInterna l do have the value but as it is a protected
member, the value is inaccessible. ). With GetOpenFileName , i will be able
to get the result (C:\test\*.lvl) .
"adnan boz" <ab*********@ho tmail.com> wrote in message
news:uV******** ******@tk2msftn gp13.phx.gbl... Hi, Right, it is inaccessable. So, you don't have the ReflectionPermi ssion. As described on msdn(Type.GetPr operty Method (String, BindingFlags): If the requested type is non-public and the caller does not have ReflectionPermi ssion to reflect non-public objects outside the current assembly, this method returns a
null reference (Nothing in Visual Basic).)
But, why do you need the private fileNames? So far I could examine, public FileNames returns the same thing, except it uses FileIOPermissio n on every fileName clone.
Adnan
"QQ" <an*******@disc ussions.microso ft.com> wrote in message news:uo******** ******@TK2MSFTN GP09.phx.gbl... I m accessing the private property of OpenFileDialog. So it is the correct field (fileNames).
"adnan boz" <ab*********@ho tmail.com> wrote in message news:#c******** ******@TK2MSFTN GP09.phx.gbl... Hi, Wrong text case on property name. Use "FileNames" , and not "fileNames" .
cu Adnan "QQ" <an*******@disc ussions.microso ft.com> wrote in message news:OD******** ******@TK2MSFTN GP11.phx.gbl... I am trying to use reflection to access the private property of OpenFileDialog fileNames property. I have the following code :
filedlg.Initial Directory = directory.Text;
filedlg.Filter = "xml files (*.xml)|*.xml" ; filedlg.FileNam e = "*.xml"; filedlg.Validat eNames = false;
if (filedlg.ShowDi alog() == DialogResult.Ca ncel) return;
Type t = filedlg.GetType ();
PropertyInfo rowsPropertyInf o = t.GetProperty(" fileNames", BindingFlags.In stance | BindingFlags.St atic | BindingFlags.Ge tProperty | BindingFlags.Pu blic | BindingFlags.No nPublic| BindingFlags.Su ppressChangeTyp e);
object[] o = (object[])rowsPropertyIn fo.GetValue(fil edlg, BindingFlags.In stance | BindingFlags.St atic | BindingFlags.Ge tProperty | BindingFlags.Pu blic | BindingFlags.No nPublic| BindingFlags.Su ppressChangeTyp e, null, null, null);
I got an error :
An unhandled exception of type 'System.NullRef erenceException ' occurred
in BGReport.exe
Additional information: Object reference not set to an instance of an object.
Any idea ? Thanks.
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