有没有一种方法可以在浏览器中呈现通过ActiveX控件保存的图像，而无需将其发送到服务器？

Question

I have an html page that allows users to click on a link to take a snapshot of any active window . 我有一个html页面，允许用户单击链接以获取任何活动窗口的快照。 When the user clicks on that button, control is passed to C# code of an ActiveX plugin (present in a CAB file), which takes the screenshot, and saves it at some temporary location. 当用户单击该按钮时，控件将传递给C# code of an ActiveX插件的C# code of an ActiveX （存在于CAB文件中），该代码将截取屏幕截图并将其保存在某个临时位置。 My problems are : 我的问题是：

I wish to show the user that snapshot in a dialog box , and ask him to choose a name before sending it to the server. 我希望在对话框中向用户显示该快照 ，并要求他选择一个名称，然后再将其发送到服务器。 The snapshot is saved in a temporary location, and that location is obviously not accessible to the javascript code, and hence I can't construct the dialog box in HTML. 快照保存在一个临时位置，并且该位置显然无法通过javascript代码访问，因此无法使用HTML构造对话框。 Is there any way around it ? 有什么办法解决吗？
I have to upload the image to the server. 我必须将图像上传到服务器。 Most examples I found, use the <html type="file"/> technique to upload a file, but that's not an option here, as we have to programmatically upload it. 我发现的大多数示例都使用<html type="file"/>技术上传文件，但这不是一个选择，因为我们必须以编程方式上传它。 WebClient.uploadFile() would do this for me, but on the server side, do I treat it as if the file has been uploaded through the <html type="file"/ > technique, or something special (the receiving end might be in Java) ? WebClient.uploadFile()会为我执行此操作，但是在服务器端，我是否将其视为已通过<html type="file"/ >技术或某些特殊方式（例如接收端是在Java中）？

Answer 1

If you are able to modify the activex component, you can make it expose the bitmap as a binary and use javascript to get the bytes and render them as a bitmap. 如果您能够修改activex组件，则可以使它以二进制形式公开位图，并使用javascript获取字节并将其呈现为位图。 Like this: 像这样：

if (window.ActiveXObject) {
    try {
        var excelApp = new ActiveXObject ("Excel.Application");
        excelApp.Visible = true;
    }
    catch (e) {
        alert (e.message);
    }
}
else {
    alert ("Your browser does not support this example.");
}

有没有一种方法可以在浏览器中呈现通过ActiveX控件保存的图像，而无需将其发送到服务器？

问题描述

1 个解决方案

解决方案1
1 已采纳 2012-10-05 12:24:34

有没有一种方法可以在浏览器中呈现通过ActiveX控件保存的图像，而无需将其发送到服务器？

问题描述

1 个解决方案

解决方案1 1 已采纳 2012-10-05 12:24:34

解决方案1
1 已采纳 2012-10-05 12:24:34