Question

无法将类型“int”隐式转换为“string”

else
{
DataRow row = dt.Rows[0];
Customer cust = new Customer();
cust.Id = (long)row["Id"];
cust.Name = (string)row["Name"];
cust.BrithDay =
(DateTime?)SqlHelper.FromDbValue(row["BrithDay"]);
cust.Address = (string)row["Address"];
cust.CustLevel = (int)row["CustLevel"];这里无法将类型“int”隐式转换为“string”
cust.TelNum = (string)row["TelNum"];

DataRow row = table.Rows[i];
Customer customer = new Customer();
customer.Id = (long)row["Id"];
customer.Name = (string)row["Name"];
customer.BrithDay = (DateTime)SqlHelper.FromDbValue(row["BrithDay"]);
customer.CustLevel = (int)row["CustLevel"];这里无法将类型“int”隐式转换为“string”
customer.TelNum = (string)row["TelNum"];
customer.Address = (string)row["Address"];

customers[i] = customer;

Answer 1

你的ClassroomBuilding和 ClassroomStep这两个变量类型都是int类型的，而 buildnum和 floor是string类型的，所以不能这样直接赋值。把这两句改成：
classroom.ClassroomBuilding = int.Parse(buildnum);
classroom.ClassroomStep = int.Parse(floor);
或者将ClassroomBuilding和 ClassroomStep这两个变量类型改成string
请采纳答案，支持我一下。