SIlverlight4 中的提示框

发布于 2025-01-05 17:05:45 字数 350 浏览 1 评论 0原文

我在 Silverlight 页面上捕获了组合键事件。现在，在事件处理程序中，我想显示一个提示框，它接受用户输入并将其存储到字符串变量中。我输入了这段代码：

string input = System.Windows.Browser.HtmlPage.Window.Invoke("prompt", new string[] { "QUICK SEARCH", "ENTER YOUR SEARCH ITEM.." }) as string;

但是当我运行它时，它显示 AccessViolation 错误的运行时错误未处理，并显示：“尝试读取或写入受保护的内存。这通常表明其他内存已损坏。” 有什么解决办法吗？？

原文

I have captured a key-combination-press event on my Silverlight Page. Now in the event handler i want to display a prompt box which takes user input and stores into a string variable.
I put in this code :

string input = System.Windows.Browser.HtmlPage.Window.Invoke("prompt", new string[] { "QUICK SEARCH", "ENTER YOUR SEARCH ITEM.." }) as string;

But when i run it, It shows me a run time error of AccessViolation error was unhandled saying:"Attempted to read or write protected memory. This is often an indication that other memory is corrupt."
any Solutions ??

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半葬歌 2025-01-12 17:05:45

经过大量搜索，我发现 Silverlight 应用程序是单线程活动。
通过上述声明，我试图调用另一个线程。
我必须使用调度程序来解决这个问题。
这就是代码的运行方式..

this.Dispatcher.BeginInvoke(() => javaScriptpopup(sender1, e1));

然后在 javaScriptPopup 中，我调用了我的字符串 input = System.Windows.Browser.HtmlPage.Window.Invoke("prompt", new string[] { "QUICK SEARCH", "ENTER YOUR SEARCH ITEM.." }) 作为字符串；陈述。

这里sender1和e1是Object和Keyeventargs类型！

With lot of searching I found out that Silverlight applcation is a Single Thread activity.
And with the above statement I was trying to invoke another thread.
I had to use the Dispatcher to sort this problem out.
this is how the code goes ..

this.Dispatcher.BeginInvoke(() => javaScriptpopup(sender1, e1));

and then in the javaScriptPopup, I called my string input = System.Windows.Browser.HtmlPage.Window.Invoke("prompt", new string[] { "QUICK SEARCH", "ENTER YOUR SEARCH ITEM.." }) as string; statement.

here sender1 and e1 are the Object and Keyeventargs type!!

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