如何获取最接近我的数字的特定步骤的值

你可以用数学计算出来。首先,得到 value 和 step ,然后确定 步 减去 value % step 从 价值 对于低数字,并添加 步 对于较高的值,则为低值。

然后确定哪个数字更接近 价值 然后返回(但首先乘以 价值 ):

static float GetClosestNumber(float value, float step)
{
    // Get the absolute values of our arguments
    var absValue = Math.Abs(value);
    step = Math.Abs(step);

    // Determing the numbers on either side of value
    var low = absValue - absValue % step;
    var high = low + step;

    // Return the closest one, multiplied by -1 if value < 0
    var result = absValue - low < high - absValue ? low : high;
    return result * Math.Sign(value);
}

下面是一些测试方法和相关类:

class Item
{
    public float Value { get; set; }
    public float Step { get; set; }
}

static void Main()
{
    var testItems = new List<Item>
    {
        new Item {Value = 1038, Step = 5},
        new Item {Value = .8f, Step = .25f},
        new Item {Value = .9f, Step = .25f},
        new Item {Value = -86, Step = -45},
        new Item {Value = -168, Step = -45},
        new Item {Value = -168, Step = 45},
    };

    foreach (var testItem in testItems)
    {
        Console.WriteLine("The closest number to {0}\twhen stepping by {1}\tis {2}", 
            testItem.Value, testItem.Step, GetClosestNumber(testItem.Value, testItem.Step));
    }

    GetKeyFromUser("\nDone! Press any key to exit...");
}

输出

如何:

        int step = 3;
        int value = 10;

        if ((value % step) == 0)
        {
            return value;
        }
        else
        {
            return ((value / step) + 1) * step;
        }