c#线程问题:线程间操作无效:从不是创建控件 的线程访问它InvalidOperationException异常 2008年07月16日 星期三 15:09 摘自http://hi.baidu.com/zzticzh/blog/item/ee4e89020a89a6094bfb518e.html 在有些情况下,您可能需要通过线程调用控件的方法。例如,您可能要在窗体上调用一个禁用按钮或更新显示的方法来响应...
Source: InvalidOperationException.cs 用指定的错误消息初始化 InvalidOperationException 类的新实例。 C# 复制 public InvalidOperationException (string? message); 参数 message String 描述错误的消息。 注解 此构造函数使用 参数初始化 Exception.Message 新异常的 message 属性。 message 的内容设计为易于理解。
Causing an InvalidOperationException with foreach|Avoiding InvalidOperationExceptions in loops foreach语句(Visual Basic 中的For Each)重复数组或集合中每个元素的一组嵌入语句,该数组或集合可实现IEnumerable或IEnumerable界面。 foreach 用于循环访问该集合以读取和修改元素,但它不能用于添加或删除集合中的项。 如果...
System.InvalidOperationException System.Net.NetworkInformation.PingException System.Net.ProtocolViolationException System.Net.WebException System.ObjectDisposedException 线程安全 此类型的任何公共静态(Visual Basic 中的Shared)成员都是线程安全的,但不保证所有实例成员都是线程安全的。
InvalidOperationException is used in cases when the failure to invoke a method is caused by reasons other than invalid arguments. For example, InvalidOperationException is thrown by: MoveNextif objects of a collection are modified after the enumerator is created. ...
application (Visual Basic, VBA, etc) but also it depends on the circumstance in which it is invoked. The only possible solution is to cause an error in your code in order to causeErrto show the numeric error that occurred. Then you have to use that error number and create a custom ...
If the method call does not have any argument or if the failure does not involve the arguments themselves, then InvalidOperationException should be used. ArgumentException uses the HRESULT COR_E_ARGUMENT, which has the value 0x80070057. For a list of initial property values for an instance of...
= null) Console.WriteLine("{0} is an invalid value for {1}: ", e.ActualValue, e.ParamName); Console.WriteLine(e.Message); } } } // The example displays the following output: // Non-negative number required. // Parameter name: length2 To correct the error, ensure that the value...
= null) Console.WriteLine("{0} is an invalid value for {1}: ", e.ActualValue, e.ParamName); Console.WriteLine(e.Message); } } } // The example displays the following output: // Non-negative number required. // Parameter name: length2 Pour corriger l’erreur, vérifiez que la ...
A statement in a foreach (For Each in Visual Basic) block changes the collection it is iterating Avoiding InvalidOperationExceptions in loops Important Adding or removing elements to a list while you are interating over the collection can have unintended and hard to predict side effects. If pos...