ListBox usage question

[caracolito1975]

Hi to every one!!!!

For some time now I'm programing in .NET and I have a question in
using ListBox

I need to databind a collection to a ListBox. My code is something
like this:

using namespace System;
using namespace System::Windows ::Forms;

ref class MyClass
{
public:
MyClass(String^ strName, String^ strValue)
{
this->m_strName = strName;
this->m_strValue = strValue;
}

property String^ Name
{
String^ get()
{
return this->m_strName;
}

void set(String^ value)
{
this->m_strName = value;
}
}

property String^ Value
{
String^ get()
{
return this->m_strValue;
}

void set(String^ value)
{
this->m_strValue = value;
}
}

private:
String^ m_strName;
String^ m_strValue;
};

System::Collect ions::Generic:: List<MyClass^>^ oMyCollection = gcnew
System::Collect ions::Generic:: List<MyClass^>( );

oCollectioon->Add(gcnew MyClass(L"Name1 ", L"Value1"));
oCollectioon->Add(gcnew MyClass(L"Name2 ", L"Value2"));
oCollectioon->Add(gcnew MyClass(L"Name3 ", L"Value3"));
oCollectioon->Add(gcnew MyClass(L"Name4 ", L"Value4"));
oCollectioon->Add(gcnew MyClass(L"Name5 ", L"Value5"));

ListBox^ oListBox = gcnew ListBox();
oListBox->DataSource = oCollectioon;
oListBox-DisplayMember = L"Name";
oListBox->ValueMember = ???;
oListBox->SelectedValueM ember = ????;

My question is:
How can I bind the collection oMyCollection to the ListoxBox
displaying the Name property of my MyClass but the ValueMember and
SelectedValueMe mber are the collection item itself?

Thanks
NAlexVS

[Ben Voigt [C++ MVP]]

<ca************ @gmail.comwrote in message
news:11******** **************@ o80g2000hse.goo glegroups.com.. .

Hi to every one!!!!

For some time now I'm programing in .NET and I have a question in
using ListBox

I need to databind a collection to a ListBox. My code is something
like this:

using namespace System;
using namespace System::Windows ::Forms;

ref class MyClass
{
public:
MyClass(String^ strName, String^ strValue)
{
this->m_strName = strName;
this->m_strValue = strValue;
}

property String^ Name
{
String^ get()
{
return this->m_strName;
}

void set(String^ value)
{
this->m_strName = value;
}
}

property String^ Value
{
String^ get()
{
return this->m_strValue;
}

void set(String^ value)
{
this->m_strValue = value;
}
}

private:
String^ m_strName;
String^ m_strValue;
};

System::Collect ions::Generic:: List<MyClass^>^ oMyCollection = gcnew
System::Collect ions::Generic:: List<MyClass^>( );

oCollectioon->Add(gcnew MyClass(L"Name1 ", L"Value1"));
oCollectioon->Add(gcnew MyClass(L"Name2 ", L"Value2"));
oCollectioon->Add(gcnew MyClass(L"Name3 ", L"Value3"));
oCollectioon->Add(gcnew MyClass(L"Name4 ", L"Value4"));
oCollectioon->Add(gcnew MyClass(L"Name5 ", L"Value5"));

ListBox^ oListBox = gcnew ListBox();
oListBox->DataSource = oCollectioon;
oListBox-DisplayMember = L"Name";
oListBox->ValueMember = ???;
oListBox->SelectedValueM ember = ????;

My question is:
How can I bind the collection oMyCollection to the ListoxBox
displaying the Name property of my MyClass but the ValueMember and
SelectedValueMe mber are the collection item itself?

Did you try not changing those properties at all?

Also, you probably want to use a BindingList<Tin stead of List<T>

[caracolito1975]

On Sep 12, 4:42 pm, "Ben Voigt [C++ MVP]" <[e-mail] spamwrote:

<caracolito1... @gmail.comwrote in message

news:11******** **************@ o80g2000hse.goo glegroups.com.. .

Hi to every one!!!!

For some time now I'm programing in .NET and I have a question in
using ListBox

I need to databind a collection to a ListBox. My code is something
like this:

using namespace System;
using namespace System::Windows ::Forms;

ref class MyClass
{
public:
MyClass(String^ strName, String^ strValue)
{
this->m_strName = strName;
this->m_strValue = strValue;
}

property String^ Name
{
String^ get()
{
return this->m_strName;
}

void set(String^ value)
{
this->m_strName = value;
}
}

property String^ Value
{
String^ get()
{
return this->m_strValue;
}

void set(String^ value)
{
this->m_strValue = value;
}
}

private:
String^ m_strName;
String^ m_strValue;
};

System::Collect ions::Generic:: List<MyClass^>^ oMyCollection = gcnew
System::Collect ions::Generic:: List<MyClass^>( );

oCollectioon->Add(gcnew MyClass(L"Name1 ", L"Value1"));
oCollectioon->Add(gcnew MyClass(L"Name2 ", L"Value2"));
oCollectioon->Add(gcnew MyClass(L"Name3 ", L"Value3"));
oCollectioon->Add(gcnew MyClass(L"Name4 ", L"Value4"));
oCollectioon->Add(gcnew MyClass(L"Name5 ", L"Value5"));

ListBox^ oListBox = gcnew ListBox();
oListBox->DataSource = oCollectioon;
oListBox-DisplayMember = L"Name";
oListBox->ValueMember = ???;
oListBox->SelectedValueM ember = ????;

My question is:
How can I bind the collection oMyCollection to the ListoxBox
displaying the Name property of my MyClass but the ValueMember and
SelectedValueMe mber are the collection item itself?

Did you try not changing those properties at all?

Also, you probably want to use a BindingList<Tin stead of List<T>

Thanks!!!
I'll try your solution using a BindingList

Regards

[Ben Voigt [C++ MVP]]

<ca************ @gmail.comwrote in message
news:11******** **************@ d55g2000hsg.goo glegroups.com.. .

On Sep 12, 4:42 pm, "Ben Voigt [C++ MVP]" <[e-mail] spamwrote:

><caracolito1.. [e-mail] e in message

news:11******* *************** @o80g2000hse.go oglegroups.com. ..

Hi to every one!!!!

For some time now I'm programing in .NET and I have a question in
using ListBox

I need to databind a collection to a ListBox. My code is something
like this:

using namespace System;
using namespace System::Windows ::Forms;

ref class MyClass
{
public:
MyClass(String^ strName, String^ strValue)
{
this->m_strName = strName;
this->m_strValue = strValue;
}

property String^ Name
{
String^ get()
{
return this->m_strName;
}

void set(String^ value)
{
this->m_strName = value;
}
}

property String^ Value
{
String^ get()
{
return this->m_strValue;
}

void set(String^ value)
{
this->m_strValue = value;
}
}

private:
String^ m_strName;
String^ m_strValue;
};

System::Collect ions::Generic:: List<MyClass^>^ oMyCollection = gcnew
System::Collect ions::Generic:: List<MyClass^>( );

oCollectioon->Add(gcnew MyClass(L"Name1 ", L"Value1"));
oCollectioon->Add(gcnew MyClass(L"Name2 ", L"Value2"));
oCollectioon->Add(gcnew MyClass(L"Name3 ", L"Value3"));
oCollectioon->Add(gcnew MyClass(L"Name4 ", L"Value4"));
oCollectioon->Add(gcnew MyClass(L"Name5 ", L"Value5"));

ListBox^ oListBox = gcnew ListBox();
oListBox->DataSource = oCollectioon;
oListBox-DisplayMember = L"Name";
oListBox->ValueMember = ???;
oListBox->SelectedValueM ember = ????;

My question is:
How can I bind the collection oMyCollection to the ListoxBox
displaying the Name property of my MyClass but the ValueMember and
SelectedValueMe mber are the collection item itself?

Did you try not changing those properties at all?

Also, you probably want to use a BindingList<Tin stead of List<T>

Thanks!!!
I'll try your solution using a BindingList

BindingList will simply cause the ListBox to automatically reflect new
elements added or removed from the collection.

No matter what collection you use, the SelectedItem property should always
be the actual data object, and not just a single property as
DisplayMember/ValueMember/SelectedValueMe mber are concerned with. So use
SelectedItem instead of SelectedValue.

>
Regards