C# 如何检查数字是否更大？

Question

我正在为我在学校的类(class)开发一个程序，我正在设置自动更新。有没有办法让“else if (webClient.DownloadString("mylink").Contains("0.3.9"))”检查链接的包含以查看它是否超过或大于 0.3.9？

    public Form1()
    {
        InitializeComponent();
        WebClient webClient = new WebClient();  
        if (File.Exists(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "\\DesktopReborn\\updates\\Update-0.4.0.xml")) { }

        else if (webClient.DownloadString("mylink").Contains("0.3.9"))
        {
            if (MessageBox.Show("An Update is Avaliable, Would you like to download it?", "DesktopReborn Updater", MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation) == DialogResult.Yes)
            {
                webClient.DownloadFile("myupdate", Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "\\DesktopReborn\\DesktopReborn.exe");

                if (File.Exists(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "\\DesktopReborn\\updates\\Update-0.3.9.xml"))
                {
                    File.Copy(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "\\DesktopReborn\\updates\\Update-0.3.9.xml", Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "\\DesktopReborn\\updates\\Update-0.4.0.xml", true);
                    File.Delete(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "\\DesktopReborn\\updates\\Update-0.3.9.xml");
                }
            }
        }
    }

Answer 1

您可以使用 Version 类来解析和比较这样的字符串，例如:

string thisVersion = "0.3.9";
string newVersion = "0.4.0";

if (Version.Parse(newVersion) > Version.Parse(thisVersion))
{
    Console.WriteLine($"{newVersion} is greater than {thisVersion}");
}

输出