SqlDataSource1.SelectCommand拼接字符串值

//SqlDataSource1.SelectCommand = "SELECT emp.name,emp.emp_id...";字符串没有拼接 写为一行代码如下，程序运行正常---
SqlDataSource1.SelectCommand
                = "SELECT emp.name,emp.emp_id,city.city_name, depart.depart_name,emp.salsry FROM city_info city,empinfo emp ,department_info depart where city.city_code = emp.city_code and depart.depart_id = emp.dept_id and emp.name+cast(emp.emp_id as varchar)+city.city_name+depart.depart_name+cast(emp.salsry as varchar) like '%李%'";//SqlDataSource1.SelectCommand = "SELECT emp.name,emp.emp_id..."+""+"";
一个字符串写成有多行字符拼接而成时，系统报错。
SqlDataSource1.SelectCommand
                = "SELECT emp.name,emp.emp_id,city.city_name,"
+"depart.depart_name,emp.salsry FROM city_info city,empinfo "
+"emp ,department_info depart where city.city_code = emp.city_code and +"depart.depart_id = emp.dept_id and emp.name+cast(emp.emp_id as varchar)+"+city.city_name+depart.depart_name+cast(emp.salsry as varchar) like '%李%'";请个位大哥有什么号办法，谢过各位。