如何使用Selenium Webdriver .NET绑定设置Chrome首选项？

Question

这是我正在使用的,用户代理可以成功设置,而下载首选项不能.

Windows 7,Chrome 26,Selenium-dotnet-2.31.2,chromedriver_win_26.0.1383.0

ChromeOptions chromeOptions = new ChromeOptions();
var prefs = new Dictionary<string, object> {
    { "download.default_directory", @"C:\code" },
    { "download.prompt_for_download", false }
};
chromeOptions.AddAdditionalCapability("chrome.prefs", prefs);
chromeOptions.AddArgument("--user-agent=" + "some safari agent");
var driver = new ChromeDriver(chromeOptions);

取自chromedriver.log:

[1.201][FINE]:      Initializing session with capabilities {

   "browserName": "chrome",

   "chrome.prefs": {

      "download.default_directory": "C:\\code",

      "download.prompt_for_download": false

   },

   "chrome.switches": [ "--user-agent=Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.57.2 (KHTML, like Gecko) Version..." ],

   "chromeOptions": {

      "args": [ "--user-agent=Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.57.2 (KHTML, like Gecko) Version..." ],

      "binary": "",

      "extensions": [  ]

   },

   "javascriptEnabled": true,

   "platform": "WINDOWS",

   "version": ""

}

检查临时首选项文件*temp\Google\Chrome\User Data\Default\Preferences,否"default_directory","prompt_for_download"并设置.

   "download": {
      "directory_upgrade": true
   },

Answer 1

如果您已更新到Chrome版本36.0.x和Selenium 2.42,则Martins解决方案不再有效.

它似乎已经更新.您现在可以使用以下代码

ChromeOptions options = new ChromeOptions();
options.AddUserProfilePreference(string preferenceName, object preferenceValue); 

我目前使用它将我的打印机设置更改为"另存为PDF",而不是默认使用此代码作为示例

ChromeOptions options = new ChromeOptions();
options.AddUserProfilePreference("printing.print_preview_sticky_settings.appState", "{\"version\":2,\"isGcpPromoDismissed\":false,\"selectedDestinationId\":\"Save as PDF\");

我认为马丁的解决方案是非常不错的,准确的,但它突然停止为我工作,所以我自然要看看如果我能找到一个解决方案.

Answer 2

Selenium dotNet驱动程序不支持设置chrome.prefs开箱即用.问题是chrome.prefs必须prefs在chromeOptions节点下定义.本ChromeOptions类不包含这个变量,所以您需要创建自己ChromeOptions的类:

public class ChromeOptionsWithPrefs: ChromeOptions
{
    public Dictionary<string,object> prefs { get; set; }
}

public static void Initialize()
{
    var options = new ChromeOptionsWithPrefs();
    options.prefs = new Dictionary<string, object>
    {
        { "intl.accept_languages", "nl" }
    };
    _driver = new ChromeDriver(@"C:\path\chromedriver", options);
}