关于C#中循环判断的问题!(简单问题)

Question

逻辑有问题while(!panduan)
            {
                if (shu == 1)
                {
                    MyDataReader();
                    panduan=true;
                    return;
                }
                else if (shu == 2)
                {
                    MyDataSet();
                    panduan=true;
                    return;
                }
                else
                {
                    Console.WriteLine("你输入错误");
                    panduan = false;
                    xianshi();
                    //Console.WriteLine("请输入你的选择,用DataReader访问数据库(1)和用DataSet访问数据库(2)");

Answer 1

或者前面的panduan=true可以不用，因为已经return了，关键是后面要加上shu=xianshi(),panduan=false
就是：
while(!panduan)
            {
                if (shu == 1)
                {
                    MyDataReader();
                    return;
                }
                else if (shu == 2)
                {
                    MyDataSet();
                    return;
                }
                else
                {
                    Console.WriteLine("你输入错误");
                    panduan = false;
                    shu=xianshi();
                   }
}