今天在工作中遇到调用浏览器打开页面,代码报错:System.ComponentModel.Win32Exception:“系统找不到指定的文件。”
代码如下:
ProcessStartInfo info = new ProcessStartInfo(@"chrome.exe");
// 打开一个新的chrome独立窗体启动
info.Arguments = " --new-window --start-maximized --kiosk " + m_Url;
// 使用环境变量,可以读取配置了环境变量文件夹内的chrome.exe
info.UseShellExecute = true;
info.WindowStyle = ProcessWindowStyle.Minimized;
System.Diagnostics.Process.Start(info);
这段代码,若不报错,有着苛刻的条件,如
1.安装了chrome后,chrome自动或个人手动把chrome.exe的文件夹路径配置到环境变量Path里。如下:
2.安装的chrome可能在System32文件夹内产生Chrome.exe
这也就是,写了这样的代码有的机器能正常调出浏览器,有些则会报错的原因。
经过多次尝试,我们使用Win+R运行Chrome.exe,在任何情况都可以调出浏览器,可能它会通过注册表获取浏览器的安装路径,找到Chrome.exe打开,而我们的Process.Start(info)却没有这么智能。所以我们的解决方案就是要通过注册表找到浏览器的绝对路径,然后打开它。
以下是helper类
public static class BrowserHelper
{
#region 打开浏览器
///
/// 打开浏览器
///
/// uri地址
/// 浏览器类型
public static void OpenBrowserUrl(string url, BrowserType browser = BrowserType.Default)
{
//FuncLog4Helper.Error($"调用浏览器:{browser.ToString()} url地址:{url}", "IPNW");
try
{
switch (browser)
{
case BrowserType.Chrome:
OpenChrome(url);
break;
case BrowserType.InternetExplorer:
OpenInternetExplorer(url);
break;
case BrowserType.FireFox:
OpenFireFox(url);
break;
case BrowserType.Default:
default:
OpenDefaultBrowserUrl(url);
break;
}
}
catch (Exception ex)
{
LoggerHelper.Error("调用浏览器报错", ex);
}
}
#endregion
#region 调用谷歌浏览器
///
/// 调用谷歌浏览器
///
/// 打开网页的链接
private static void OpenChrome(string url)
{
try
{
string appPath = GetChromePath();
var result = default(Process);
if (!string.IsNullOrWhiteSpace(appPath) && File.Exists(appPath))
result = Process.Start(appPath, url);
if (result == null)
{
result = Process.Start("chrome.exe", url);
if (result == null)
{
OpenDefaultBrowserUrl(url);
}
}
}
catch
{
// 出错调用用户默认设置的浏览器,还不行就调用IE
OpenDefaultBrowserUrl(url);
}
}
#endregion
#region 用IE打开浏览器
///
/// 用IE打开浏览器
///
///
private static void OpenInternetExplorer(string url)
{
try
{
Process.Start("iexplore.exe", url);
}
catch (Exception ex)
{
LoggerHelper.Error("调用浏览器报错", ex);
// IE浏览器路径安装:C:\Program Files\Internet Explore
try
{
string executeName = "iexplore.exe";
string iePath = $@"C:\Program Files\Internet Explorer\{executeName}";
if (!File.Exists(iePath))
{
iePath = $@"C:\Program Files (x86)\Internet Explorer\{executeName}";
if (!File.Exists(iePath))
{
iePath = GetExecutePath(executeName);
if (!File.Exists(iePath))
iePath = string.Empty;
}
}
if (string.IsNullOrWhiteSpace(iePath))
{
if (MessageBox.Show(@"系统未安装IE浏览器,是否下载安装?", null, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question) == DialogResult.Yes)
{
// 打开下载链接,从微软官网下载
OpenDefaultBrowserUrl("http://windows.microsoft.com/zh-cn/internet-explorer/download-ie");
}
return;
}
ProcessStartInfo processStartInfo = new ProcessStartInfo
{
FileName = iePath,
Arguments = url,
UseShellExecute = false,
CreateNoWindow = true
};
Process.Start(processStartInfo);
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
}
#endregion
#region 打开系统默认浏览器(用户自己设置了默认浏览器)
///
/// 打开系统默认浏览器(用户自己设置了默认浏览器)
///
///
private static void OpenDefaultBrowserUrl(string url)
{
Process result = null;
try
{
result = Process.Start(url);
}
catch (Exception ex)
{
LoggerHelper.Error("调用浏览器报错", ex);
OpenInternetExplorer(url);
}
}
#endregion
#region 火狐浏览器打开网页
///
/// 火狐浏览器打开网页
///
///
private static void OpenFireFox(string url)
{
try
{
var result = default(Process);
string executeName = "firefox.exe";
string appPath = GetExecutePath(executeName);
if (!string.IsNullOrWhiteSpace(appPath) && File.Exists(appPath))
{
result = Process.Start(appPath, url);
}
if (result == null)
{
//64位注册表路径
var openKey_64 = @"SOFTWARE\Wow6432Node\Mozilla\Mozilla Firefox";
RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(openKey_64);
appPath = registryKey?.GetValue(string.Empty)?.ToString();
if (string.IsNullOrWhiteSpace(appPath))
{
//32位注册表路径
var openKey_32 = @"SOFTWARE\Mozilla\Mozilla Firefox";
registryKey = Registry.LocalMachine.OpenSubKey(openKey_32);
appPath = registryKey?.GetValue(string.Empty)?.ToString();
}
if (!string.IsNullOrWhiteSpace(appPath))
result = Process.Start(appPath, url);
}
// 谷歌浏览器就用谷歌打开,没找到就用系统默认的浏览器
// 谷歌卸载了,注册表还没有清空,程序会返回一个"系统找不到指定的文件。"的bug
if (result == null)
{
result = Process.Start(executeName, url);
if (result == null)
{
OpenDefaultBrowserUrl(url);
}
}
}
catch
{
// 出错调用用户默认设置的浏览器,还不行就调用IE
OpenDefaultBrowserUrl(url);
}
}
#endregion
#region 注册表中获取可执行文件路径
///
/// 注册表中获取可执行文件路径
///
/// 可执行文件名称
///
public static string GetExecutePath(string executeName)
{
if (string.IsNullOrWhiteSpace(executeName))
return string.Empty;
string strKeyName = string.Empty;
string appPath = string.Empty;
if (executeName.IndexOf(".exe", StringComparison.OrdinalIgnoreCase) == -1)
executeName = $"{executeName}.exe";
string softPath = $@"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\{executeName}";
RegistryKey regSubKey = Registry.LocalMachine.OpenSubKey(softPath, false);
if (regSubKey != null)
{
object objResult = regSubKey.GetValue(strKeyName);
RegistryValueKind regValueKind = regSubKey.GetValueKind(strKeyName);
if (regValueKind == RegistryValueKind.String)
{
appPath = objResult?.ToString();
}
}
return appPath;
}
#endregion
#region 获取Chorme浏览器路径
///
/// 获取Chorme浏览器路径
///
///
public static string GetChromePath()
{
string chormePath = string.Empty;
try
{
string chromeAppKey = @"\Software\Microsoft\Windows\CurrentVersion\App Paths\chrome.exe";
chormePath = (Registry.GetValue("HKEY_LOCAL_MACHINE" + chromeAppKey, "", null) ?? Registry.GetValue("HKEY_CURRENT_USER" + chromeAppKey, "", null))?.ToString();
if (!string.IsNullOrWhiteSpace(chormePath) && File.Exists(chormePath))
return chormePath;
chormePath = $@"{Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData)}\Google\Chrome\Application\chrome.exe";
//win10默认安装路径
if (!string.IsNullOrWhiteSpace(chormePath) && File.Exists(chormePath))
return chormePath;
string executeName = "chrome.exe";
chormePath = GetExecutePath(executeName);
if (!string.IsNullOrWhiteSpace(chormePath) && File.Exists(chormePath))
return chormePath;
// 64位注册表路径
var openKey_64 = @"SOFTWARE\Wow6432Node\Google\Chrome";
RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(openKey_64);
chormePath = registryKey?.GetValue(string.Empty)?.ToString();
if (!string.IsNullOrWhiteSpace(chormePath) && File.Exists(chormePath))
return chormePath;
var openKey_32 = @"SOFTWARE\Google\Chrome";
registryKey = Registry.LocalMachine.OpenSubKey(openKey_32);
chormePath = registryKey?.GetValue(string.Empty)?.ToString();
if (!string.IsNullOrWhiteSpace(chormePath) && File.Exists(chormePath))
return chormePath;
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
return chormePath;
}
#endregion
}
public enum BrowserType
{
[Description("客户默认浏览器")]
Default = 0,
[Description("谷歌浏览器")]
Chrome = 1,
[Description("IE浏览器")]
InternetExplorer = 2,
[Description("火狐浏览器")]
FireFox = 3,
}
以下是调用代码
BrowserHelper.OpenBrowserUrl("www.baidu.com", BrowserType.Chrome);