如何在Web浏览器中访问扫描仪 [英] How to access scanner in web browser

问题描述

我已经使用vs2010和silverlight 5在网络浏览器中访问扫描仪。当我在iis7上托管应用程序时，我可以访问Mozilla中的扫描程序，但不能访问Internet Explorer。为什么IE浏览器不支持在网络浏览器中访问扫描仪？



我做了更改，

服务器端

•使用证书签署xap。

客户端

•将证书安装到受信任的发布者

•更改注册表项HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Silverlight \AllowElevatedTrustAppsInBrowser改为1



我的代码是，

I have used vs2010 and silverlight 5 to access scanner in web browser. When i host the application on iis7, i can able to access scanner in Mozilla but does not in internet explorer. why the IE browser does not support to access scanner in web browser?

I made changes in,
Server side
• Sign the xap using certificate.
Client side
• Install the cert into "trusted publishers"
• Change the reg key "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Silverlight \AllowElevatedTrustAppsInBrowser" to 1

My code is,

try
{
    using (dynamic CommonDialog = AutomationFactory.CreateObject("WIA.CommonDialog"))
    {
        dynamic imageFile = CommonDialog.ShowAcquireImage();
        if (imageFile != null)
        {
            if (!Directory.Exists("D:\\ScanImage"))
            {
                Directory.CreateDirectory("D:\\ScanImage");
            }
            string filePath = string.Format("D:\\ScanImage\\{0}.jpg", Guid.NewGuid());
            imageFile.SaveFile(filePath);
        }
    }
}
catch (System.Runtime.InteropServices.COMException ex)
{
    if (ex.ErrorCode == -2145320939)
    {
        MessageBox.Show("Could not find an attached scanner.", "Scanner Error", MessageBoxButton.OK);
    }
    else
    {
        MessageBox.Show(ex.Message, "Scanner Error", MessageBoxButton.OK);
    }
}

提前致谢

Thanks in advance

推荐答案

也许这里的例子可以帮助你：

http://blog.yezhucn.com/wiaaut/ showacquireimage.htm [ ^ ]



祝你好运！

Maybe the examples here can help you out:
http://blog.yezhucn.com/wiaaut/showacquireimage.htm[^]

Good luck!

Sugu，



要在IE中工作，只需在 InBrowserSettings.xml中更改ElevatedPermissions =必需

代码

Sugu,

To work in IE, Just change ElevatedPermissions="Required" in InBrowserSettings.xml
code

<InBrowserSettings>
  <InBrowserSettings.SecuritySettings>
    <SecuritySettings ElevatedPermissions="Required" />
    <!--<SecuritySettings ElevatedPermissions="NotRequired" /> This is default-->
  </InBrowserSettings.SecuritySettings>
</InBrowserSettings>

这篇关于如何在Web浏览器中访问扫描仪的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！