无法将类型string隐式转换为int怎么解决？

无法将类型string隐式转换为int怎么解决？

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

显示转换
classroom.ClassroomStep = (int)floor;追问这样试了一下，还是不可以

三种方法：
1、classroom.ClassroomBuilding = (int)buildnum;
2、classroom.ClassroomBuilding = Int.Paras(buildnum);
3、classroom.ClassroomBuilding = Convert.ToInt32(buildnum);追问我用了以下第三种方法，能够执行，但显示错误说输入字符串的格式不正确，该怎么办追答要输入纯数字，如果有字母或符号就会报错

把classroom.ClassroomBuilding = buildnum
改成classroom.ClassroomBuilding =Convert.ToInt32（buildnum ）

写成这样试试string buildnum = building.Text.Trim();
classroom.ClassroomBuilding = Convent.ToInt32(buildnum);
string floor = flor.Text.Trim();
classroom.ClassroomStep = Convent.ToInt32(floor);

classroom.ClassroomStep = int.Parse(floor);