C# 中检测 Webview2 是否安装

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在 C# 中主要有两种方式来检测 Webview2 是否已经安装：

  1. 通过 CoreWebView2Environment.GetAvailableBrowserVersionString() 返回值来判断

  2. 通过注册表值来判断

    这种方式不是很稳定，有时候用户的注册会缺失

GetAvailableBrowserVersionString() 方法

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public static class WebView2Install
{
    public static InstallInfo GetInfo()
    {
        var version = GetWebView2Version();

        return new InstallInfo(version);
    }

    private static string GetWebView2Version()
    {
        try
        {
            return CoreWebView2Environment.GetAvailableBrowserVersionString();
        }
        catch (Exception) { return ""; }
    }
}

public class InstallInfo
{
    public InstallInfo(string version) => (Version) = (version);

    public string Version { get; }

    public InstallType InstallType => Version switch
    {
            var version when version.Contains("dev") => InstallType.EdgeChromiumDev,
            var version when version.Contains("beta") => InstallType.EdgeChromiumBeta,
            var version when version.Contains("canary") => InstallType.EdgeChromiumCanary,
            var version when !string.IsNullOrEmpty(version) => InstallType.WebView2,
            _ => InstallType.NotInstalled
    };
}

public enum InstallType
{
    WebView2, EdgeChromiumBeta, EdgeChromiumCanary, EdgeChromiumDev, NotInstalled
}

注册表法

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public static bool HasWebView2InstalledByReg()
{
    using var key = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"SOFTWARE\WOW6432Node\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}");
    if (key == null) return false;
    var versionStr = key.GetValue("pv");
    if(versionStr == null) return false;
    return !string.IsNullOrEmpty(versionStr.ToString());
}

参考

.net - Detect if WebView2 is installed on clients machine (VB.NET) - Stack Overflow