无法使用表单上的控件. [英] Unable to use controls on the form.

问题描述

我创建了一些具有形式的静态实例.在后退按钮上，单击事件正在依次调用currentFormObj.Close();和formObj.ShowDialog();.出现一个异常，即值不在预期范围内".但是，当我使用formObj.Show();时，会显示该表单，但无法访问该表单上的控件.您能帮上忙吗?

谢谢
Yashwanth

Hi,
I have created some static instances of forms i have. On back button click event am calling currentFormObj.Close(); followed by formObj.ShowDialog();. Am getting an exception that "Value does not fall within the expected range." But when i use formObj.Show(); the form is getting shown but am unable to access the controls on the form. Can you please help on this?

Thank You
Yashwanth

推荐答案

以前没有看到该错误消息-但是您需要更多信息.在VS中，转到菜单上的调试"，然后选择例外".在每个框中打勾，然后按OK.
现在，无论何时抛出异常，无论是否进行处理，您都将获得一个异常.通过调试器运行代码，希望您应该更好地了解到底是什么代码引发了低级异常，以及原因.还要查看InnerException属性-可能是相关的.

Not seen that error message before - but you need more information. In VS go to "Debug" on the menu, and select "Exceptions". Put a tick in every box, and press OK.
You will now get an exception whenever it is thrown - whether it is handled or not. Run your code through the debugger, and hopefully, you should get a better idea of exactly what code is throwing the low level exception, and why. Also look at the InnerException property - it may be relevant.

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