Performing operations from DataTable c++

[User 11196121]

Hi all Might I ask some advice/fixes on the below code, as I am still not familiar with referencing multiple columns from DataTable in c++ yet? Confused | :confused: Your inputs would be much appreciated. Thanks in advance.

MySqlCommand^CmdDataBase = gcnew MySqlCommand("select * from world.city",conDataBase);
try{
conDataBase->Open();
MySqlDataAdapter^sda= gcnew MySqlDataAdapter();
sda->SelectCommand=CmdDataBase;
DataTable^dbdataset=gcnew DataTable();
DataColumn^rt_col=gcnew DataColumn();
rt_col->ColumnName = "Ret";
rt_col->DataType=System::Type::GetType("System.Double");
dbdataset->Columns->Add(rt_col);

				 DataRow^rt\_row;
				 
				 for (int row=0;dbdataset->Rows->Count;row++)				 
				 {
					 rt\_row=dbdataset->NewRow();
					 rt\_row\["Ret"\]=System::Convert::ToDouble(rt\_row\["Population"\])/System::Convert::ToDouble(rt\_row\["Population"\]);
				     //rt\_row\["DataReturn"\]=System::Convert::ToDouble(dbdataset->Rows\[row\]\["Population"\])/System::Convert::ToDouble(dbdataset->Rows\[row-1\]\["Population"\]);
					 dbdataset->Rows->Add(rt\_row);
					 
				 }
				 
				 sda->Fill(dbdataset);	
				 BindingSource^bSource=gcnew BindingSource();
				 bSource->DataSource=dbdataset;
				 dtGrid->DataSource=bSource;
			 
			 } 
			 catch(Exception^ex) {
				 MessageBox::Show(ex->Message);
	 }