为什么这句异常总是捕捉不到呢?

Question

try
ADOConnection1.ConnectionString:='Provider=SQLOLEDB.1;Password='+registerTemp.readstring('userpass')+';Persist Security Info=True;User ID='+registerTemp.readstring('username')+';Initial Catalog='+label1.Caption+';Data Source='+combobox1.Text;
except
Application.messagebox('数据库设置参数有错误,请核实。','提示',MB_ICONERROR);
application.Terminate;
end;我想捕捉到下面的异常
Application.messagebox('数据库设置参数有错误,请核实。','提示',MB_ICONERROR);可是总是捕捉不到呀应该怎么写/

Answer 1

try
ADOConnection1.close;
ADOConnection1.ConnectionString:='Provider=SQLOLEDB.1;Password='+registerTemp.readstring('userpass')+';Persist Security Info=True;User ID='+registerTemp.readstring('username')+';Initial Catalog='+label1.Caption+';Data Source='+combobox1.Text;
ADOConnection1.open;
except
Application.messagebox('数据库设置参数有错误,请核实。','提示',MB_ICONERROR);
application.Terminate;
end;