Binding a DataSource Table column to a form object (RadioButtons)

Hi,

I have a little question. I have an application which interfaces with a SQL Express Database. On a form, I want to bind a control which is made of several Radio buttons to a table column which is in fact a varchar(1). This is the picture:

Table column: OptVisualRpt varchar(1)

Screen control: 2 radio buttons

rb_VisRPTbImp_O for "yes"

rb_VisRPTbImp_N for "no"

I'm really scratching my head as how I can bind a single table column to my radio buttons controls. I think that I just can't this way but rather have to use an intermediate variable or control.

Solution 1?

I thought of using a local variable that I would set to "y" or "n" following "CheckedChanged" events fired from radio buttons but I don't know how to bind this variable to my table column.

Solution 2?

I thought of placing a hidden text control into my form, which one would be binded to my table column, that I would also set to "y" or "n" following "CheckedChanged" events fired from radio buttons.

Any of these solutions which would be feasible or any more neat way to do it?

Many thanks in advance,

Stphane

Hi again,

Finally sounds that last night I could solve my problem by myself. Let me explain.

1- I first got rid of the "Binding source". I removed following lines:

=> private: System::Windows::Forms::BindingSource ^ InfoBaseBindingSource;

=> this->InfoBaseBindingSource = (gcnew System::Windows::Forms::BindingSource(this->components));

=> (cli::safe_cast<System::ComponentModel::ISupportInitialize^ >(this->InfoBaseBindingSource))->BeginInit();

=> //
// InfoBaseBindingSource
//

this->InfoBaseBindingSource->DataMember = L"InfoBase";
this->InfoBaseBindingSource->DataSource = this->Test_ADODataSet;

=> (cli::safe_cast<System::ComponentModel::ISupportInitialize^ >(this->InfoBaseBindingSource))->EndInit();

2- At the same time, for every field control that were fed by it, I removed from code the following line (here is an example):

this->ID_Compagnie->DataBindings->Add((gcnew System::Windows::Forms::Binding(L"Text", this->InfoBaseBindingSource, L"Identification", true)));

3- I then changed the Form1_Load routine for the following:

this->InfoBaseTableAdapter->Fill(this->Test_ADODataSet->InfoBase);

DataTable ^ Dt_Infobase = this->Test_ADODataSet->Tables["InfoBase"];
if(Dt_Infobase != nullptr)
{
array<DataRow^> ^ Rw_InfoBase = Dt_Infobase->Select();
if(Rw_InfoBase->Length != 0)
{
this->ID_Compagnie->Text = Rw_InfoBase[0]["Identification"]->ToString();
this->Adr_Compagnie->Text = Rw_InfoBase[0]["Adresse"]->ToString();
...

==> Example of loading a masked text box

// Affichage et rectification du format du Code Postal/ZipCode

if(String::Compare(this->Pays_Compagnie->Text,"Canada") == 0)
{
this->CPZip_Compagnie->Mask = ">L0>L 0>L0";
this->Pnl_VSZCode->Hide();
}
else
{
this->Pnl_VSZCode->Show();
if(this->CPZip_Compagnie->Text->Length > 5)
{
this->VScrl_ZCode->Value = 1;
this->CPZip_Compagnie->Mask = "99999";
}
else
{
this->VScrl_ZCode->Value = 0;
this->CPZip_Compagnie->Mask = "99999-9999";
}
}

this->CPZip_Compagnie->Text = Rw_InfoBase[0]["CodePostal_Zip"]->ToString();

...

==> Example of "loading" info vs a set of radio buttons

String ^ Logo_ModeAff = Rw_InfoBase[0]["LogoRpt_ModeAff"]->ToString();
if(Logo_ModeAff == "C")
{
this->rb_ModeAffLCoord->Checked = true;
this->rb_ModeAffLOnly->Checked = false;
}
else
{
this->rb_ModeAffLCoord->Checked = false;
this->rb_ModeAffLOnly->Checked = true;
}
}

4- I then changed the B_Accept_Click routine for the following:

I removed following sentences:

this->InfoBaseBindingSource->EndEdit();
this->InfoBaseTableAdapter->Update(this->Test_ADODataSet->InfoBase);
this->Test_ADODataSet->AcceptChanges();

And replaced them with following:

DataTable ^ Dt_Infobase = this->Test_ADODataSet->Tables["InfoBase"];
if(Dt_Infobase != nullptr)
{
array<DataRow^> ^ Rw_InfoBase = Dt_Infobase->Select();
if(Rw_InfoBase->Length == 0)
{
DataRow ^ NRw_InfoBase = Dt_Infobase->NewRow();

NRw_InfoBase["Identification"] = this->ID_Compagnie->Text;
...
==> Example of a "saving" info vs a set of radio buttons

if(this->rb_ModeAffLCoord->Checked == true)
NRw_InfoBase["LogoRpt_ModeAff"] = "C";
else
NRw_InfoBase["LogoRpt_ModeAff"] = "L";
...

Dt_Infobase->Rows->Add(NRw_InfoBase);
}
else
{
Rw_InfoBase[0]["Identification"] = this->ID_Compagnie->Text;
...
==> Example of a "replacing" info vs a set of radio buttons

if(this->rb_ModeAffLCoord->Checked == true)
Rw_InfoBase[0]["LogoRpt_ModeAff"] = "C";
else
Rw_InfoBase[0]["LogoRpt_ModeAff"] = "L";
...
}

this->InfoBaseTableAdapter->Update(this->Test_ADODataSet);
this->Test_ADODataSet->AcceptChanges();
}

5- I finally changed the B_Cancel_Click routine for the following:

I removed following sentences:

this->InfoBaseBindingSource->EndEdit();

This code is maybe not the best way to do it. If someone has any more proper way to do it, I would certainly appreciate to learn. My conclusion is that doing this binding process manually gives better results than relying on a BindingSource object.

Stphane