c# - 如何将数字四舍五入并显示为百分比？

Question

我的数学有点生疏，所以我希望有人能帮助我。使用下面的代码，我想执行以下操作:根据安装的内存量，我想显示可用内存的百分比，而不是剩余的内存量(以兆字节为单位)。

private void timer1_Tick(object sender, EventArgs e)
{
    string memory;
    int mem;
    memory = GetTotalMemoryInBytes().ToString();
    mem = Convert.ToInt32(memory);
    mem = mem / 1048576; 
    progressBar2.Maximum = mem;
    progressBar2.Value = mem - (int)(performanceCounter2.NextValue());
    label2.Text = "Available Memory: " + (int)(performanceCounter2.NextValue()) + "Mb"; 


}

//using Microsoft visual dll reference in c#
static ulong GetTotalMemoryInBytes()
{
    return new Microsoft.VisualBasic.Devices.ComputerInfo().TotalPhysicalMemory;
}

Answer 1

(可用内存/总内存)* 100 将是您的百分比。

double percent = ((performanceCounter2.NextValue() * 1.0) / mem) * 100;
label2.Text = "Available Memory: " + percent;