Cannot Perform Delete In SqlCommand

Hi everyone!
I am building a database in VC++2005 Express, connecting to SQL Server. I planed to add Delete function to a button, and when clicked, the data with the specific ID according to the IDTextBox->Text would be deleted from the table. However, nothing happened. I don't know what's wrong with my program.

I have attached the button_Click here. Thank you!

private: System:: Void button8_Click(System:: Object^ sender, System:: EventArgs
^ e) {

System:: Windows:: Forms:: DialogResult^ MyDlg=MessageBox:: Show("Are you sure
to delete?","Warning",MessageBoxButtons:: YesNo,MessageBoxIcon:: Question);
if (MyDlg==System:: Windows:: Forms:: DialogResult:: Yes)
{
if (this->sqlConnection1->State==ConnectionState:: Open)
{
this->sqlConnection1->Close();
this->sqlConnection1->ConnectionString="Data Source=(local);Integrated S
ecurity=SSPI;database=Pnemoconises";
this->sqlConnection1->Open();
SqlTransaction^ MyTransaction=this->sqlConnection1->BeginTransaction();

try
{
this->sqlCommand1=this->sqlConnection1->CreateCommand();

this->sqlCommand1->CommandType=CommandType:: Text;
this->sqlCommand1->CommandText="DELETE FROM [Basic_Info] WHERE Patient I
D='"+Convert:: ToString(this->Patient_IDTextBox->Text)+"'";
this->sqlCommand1->Transaction=MyTransaction;
this->sqlCommand1->ExecuteNonQuery();
MyTransaction->Commit();
}
catch (SqlException^ ex)
{
MyTransaction->Rollback();
}
catch (Exception^ ex)
{
MessageBox:: Show(ex->Message,"Information",MessageBoxButtons:: OK,Message
BoxIcon:: Information);
}
finally
{
this->sqlConnection1->Close();
}
}


}
}