System.Windows.Forms.SendKeys.SendInput >> 任务计划程序拒绝访问

Question

我遇到了一个模糊问题，这里是以下设置。

我有一个小型 C# 应用程序，用于每天使用 Windows 2012R2 服务器上的任务计划程序登录到某个网站。

这是 HTML 登录代码段：

<div class="control-group row-space-1">
<input class="decorative-input" id="signin_email" name="email" placeholder="Email Address" type="email" />
</div>
<div class="control-group row-space-2">
<input class="decorative-input" id="signin_password" name="password" placeholder="Password" type="password" />
</div>

<div class="clearfix row-space-2">
<label for="remember_me2" class='checkbox remember-me'>
<input type="checkbox" name="remember_me" id="remember_me2" value="true" class="remember_me"/>
Remember me
</label>
<a href="/forgot_password" class="forgot-password">Forgot password?</a>
</div>

<button type="submit" class="btn btn-block btn-primary large btn-large padded-btn-block">
Log In
</button>

应用程序有一个 Form.WebBrowser，它可以打开一个带有用户和密码字段的网站。应用程序检查属性并将输入发送到登录。 代码片段如下：

HtmlElementCollection tagsColl=webBrowser1.Document.GetElementsByTagName("input");
foreach (HtmlElement currentTag in tagsColl)
{
    if (currentTag.Name.Equals("email"))
        currentTag.SetAttribute("value", username);
    if (currentTag.Name.Equals("password"))
        currentTag.SetAttribute("value", password);
    currentTag.Focus();
    SendKeys.Send("{ENTER}");
}

当我手动运行该应用程序时，它运行良好。

关于任务调度器设置。我尝试了很多不同的设置，看看这里：

Account:
local\Administrator
=> Error: Access denied

[x] Run only when user is logged in
=> Error: Access denied

[x] Run weather user is logged in or not
=> The Form with the WebBrowser doesent appear, I can see the task running in the task manager but nothing happens

[x] Run with highest privilegs
=> No effect

Configure for: Windows Server 2012 R2

当任务调度程序运行作业时，我总是遇到以下异常。

Error: Access denied

************** Exception Text **************
System.ComponentModel.Win32Exception (0x80004005): Access is denied
at System.Windows.Forms.SendKeys.SendInput(Byte[] oldKeyboardState, Queue previousEvents)
at System.Windows.Forms.SendKeys.Send(String keys, Control control, Boolean wait)
at System.Windows.Forms.SendKeys.Send(String keys)
at airbnblogin.Form1.autofill(String username, String password)
at airbnblogin.Form1.<main>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---

我猜可能是因为 Windows 用户没有登录，所以它无法输入字符串。

所以这是我的问题，我该如何解决这个问题？我愿意接受每一个建议/进一步的解释！

Answer 1

您可以通过使用登录表单按钮的单击事件轻松避免 SendKey 方法。 使用 ID 为“提交”的按钮遵循您的编码风格：

HtmlElementCollection tagsColl=webBrowser1.Document.GetElementsByTagName("input");
foreach (HtmlElement currentTag in tagsColl)
{
    if (currentTag.Name.Equals("email"))
        currentTag.SetAttribute("value", username);

    if (currentTag.Name.Equals("password"))
        currentTag.SetAttribute("value", password);
}

HtmlElement button = webBrowser1.Document.GetElementById("submit");
if (button) button.InvokeMember("click");

Answer 2

这个有效！

tagsColl = webBrowser1.Document.GetElementsByTagName("button");
        foreach (HtmlElement curElement in tagsColl)
        {
            if (curElement.GetAttribute("submit").Equals(""))
            {
                curElement.InvokeMember("click");
            }
        }