如何检查c#windows应用程序中是否已打开一个表单 [英] How to check whether one form is already open or not in c# windows application
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问题描述
大家好,
我正在使用c#windows应用程序开发一个Windows应用程序。我使用了MDI父窗体。现在我想阻止一个窗体(例如form1)如果表格(例如form1)已经打开则重新开放。怎么做?
谢谢
解决方案
尝试使用Application.OpenForms
Property检查打开的表单,返回所有打开的表单,如果Form1不在集合中,则调用一个新表单。
http://msdn.microsoft.com /en-US/library/system.windows.forms.application.openforms.aspx [ ^ ]
With Best问候
我认为Application.OpenForms
属性可以用于此目的,如下所示
< pre lang =cs> public bool IsFormOpen(Type formType){
foreach (表格形式 in Application.OpenForms)
if (form.GetType()。Name == form.Name)
return true ;
return false ;
}
// 然后检查并实例化form1
if (!IsFormOpen( typeof (form1))
// form1未打开
引用此< br $> b $ b
http://hashfactor.wordpress.com/2009/01/28/c-check-if-a-form-is-already-opened/ [ ^ ]
http://stackoverflow.com / questions / 4722198 / checking-if-windows-application-is-running [ ^ ]
Hi all,
I am developing one windows application using c# windows application.There i have used MDI parent form.Now i want to prevent one form(e.g.form1) from reopening if the form(e.g. form1) is already open. How to do that?
Thanks
解决方案
Hi,
try to check open forms withApplication.OpenForms
Property,return all open forms and if Form1 isn't in collection, invoke a new one.
http://msdn.microsoft.com/en-US/library/system.windows.forms.application.openforms.aspx[^]
With Best Regards
I think theApplication.OpenForms
property can be used for this purpose as shown below
public bool IsFormOpen(Type formType){ foreach (Form form in Application.OpenForms) if (form.GetType().Name == form.Name) return true; return false; } //Then to check and instantiate form1 if(!IsFormOpen(typeof (form1)) //form1 is not open
refer this
http://hashfactor.wordpress.com/2009/01/28/c-check-if-a-form-is-already-opened/[^]
http://stackoverflow.com/questions/4722198/checking-if-windows-application-is-running[^]
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