command

问题 Ok, my program in a nutshell has a list of customers. Those customers are all listed in a listbox so when one is clicked on all of their information appears on the form. This works through databinding, all of the controls on the page are bound to the listbox's selectedItem. What I would like to do now is have a message dialog that asks if the user would like to save when they try to change the selection. If they don't I want to revert it back to the original item in the collection. If they

问题 Is it possible to have a different Datacontext for a WPF Command and a CommandParameter ? <UserControl> <UserControl.Resources> <viewmodels:ListViewGridBaseViewModel x:Key="vm" /> </UserControl.Resources> <Grid> <ContentControl x:Name="currentContent" Content="{Binding Path=ListGrid}" > <ContentControl.ContextMenu> <ContextMenu > <MenuItem Command="{Binding Path=Save}" CommandParameter="{Binding ElementName=currentContent}" DataContext="{StaticResource ResourceKey=vm}" Header="Save">

问题 I understand that i am supposed to use chdir() but I just need an explanation as to why calling cd shell command through system or execvp() from a child process would not work? Thanks!! 回答1: Because chdir only modifies the environment of the current process. It can't touch the environment of the parent. See also the link posted by tripleee. 来源： https://stackoverflow.com/questions/7120493/why-calling-cd-shell-command-through-system-or-execvp-from-a-child-process-w

问题 I want to change timezone with command. I know applying hostpath. Could you know how to apply command ? ln -snf /user/share/zoneinfor/$TZ /etc/localtime it works well within container. But I don't know applying with command and arguments in yaml file. 回答1: You can change the timezone of your pod by using specific timezone config and hostPath volume to set specific timezone. You're yaml file will look something like: apiVersion: v1 kind: Pod metadata: name: busybox-sleep spec: containers: -

问题 I have a requirements in UNIX command where i have a path similar to this: path/to/file/manyfiles.extensions now i want the output something similar to- file/manyfiles.extensions now i can do this listing both /path/to and /path removing them one by one. but i might get only "/path/to" as my input and i have to remove both from the tree in one command. You might think that i can list 2 folders to remove, but in many a cases i get structures having 12-13 of subfolders in which i need only the

问题 I'm a newbie in the MVVM design patter I'm trying to create a simple app where a list of students is shown in the main window and I want the user to be able to add a new student to the list I have accomplished the binding of the observable collection where the students' data are but how can I create a new user by fetching the data from the textboxes and using them as a parameter in a command Here is my View <Grid> <Grid.RowDefinitions> <RowDefinition Height="2*"/> <RowDefinition Height="2*"/>

问题 I am currently building a small text editor for a custom file format. I have a GUI, but I also implemented a small output console. What I want to achieve is to add a very basic input field to execute some commands and pass parameters. A command would look like : compile test.json output.bin -location "Paris, France" -author "Charles \"Demurgos\"" My problem is to get an array containing the space-separated arguments, but preserving the double quoted parts which might be a string generated by

问题 everyone! I have an admin task: I need to write a script to execute commands given in a file on a list of servers whose ip address, login name and password is given in another file. My goal is to execute a command on every server concurrently, that is I don't want to wait until a server finish its command before I ask another server to execute the command. Anyone know how to do it? Thanks! 回答1: Fabric could be your answer. I am using it for my current project. 来源： https://stackoverflow.com

问题 How come when I try to search the grep manual for the color option with this command man grep | grep "color" I get no result but when I run man grep man outputs this [EDITED] --colour=[when, --color=[when]] Mark up the matching text with the expression stored in GREP_COLOR environment variable. The possible values of when can be `never', `always' or `auto'. 回答1: Try piping the man page through col -b to clean up any special characters before grepping. For example: man grep | col -b | grep

问题 I wanted to have my DataGrids with a context menu that allows the user to move the selected rows up or down. After some search, I've come up with the following code that has a problem. It seems that CanExecute is only called once (I guess when the menu gets created), so my MenuItem will either be enabled or disabled all of the time . What I am struggling to achieve is to make it enabled when there are rows selected in the DataGrid and disabled when there aren't any. Currently this doesn't