1/3/2024 0 Comments Wpf passwordbox text conditionI tried to create general-purpose solution via attached property,īut it failed in fringe cases due to some mysteries deep in WPF implementation. I am however looking for something more general-purpose. (with many variations circulating around the net) that makes the Password property bindable. PasswordBox in particular already has a specialized solution via attached property This solution unfortunately breaks down rather quickly once you start doing anything non-trivial, for example trying to set initial value for the PasswordBox. One can even insert a converter in the command parameter binding to wrap the PasswordBox in an interface to comply with MVVM. We are really looking for some way to have the control in both view and view model.Īnother simple solution, especially popular with PasswordBox, is to ship the control to view model as command parameter, e.g. Aside from being totally non-MVVM, this technique has the downside of forcing all properties and children of the binded control to be set from within view model. One can just instantiate the offending control in view model and then bind it down to the view via ContentControl. I have another simple technique that can be used anywhere in XAML code. It relies on user controls, which are a serious performance killer in WPF. There are many viable workarounds, which I will discuss briefly before presenting my favorite one liner. That's bad design, of course, but these controls are a given and all we can do is to invent clever workarounds. These controls essentially blend data representation and UI in one class. PasswordBox or the 3rd party Awesomium WebControl. There are some controls in WPF that aren't designed for proper binding from view models, e.g. Reason: JungleControls library is no longer maintained. Information presented on this page might be out of date. The Slider control allows you to select a numeric value through a slider.Robert Važan Expose WPF controls to view models IIĪccess controls from within view model by adding a bit of code into window constructor. To allow multiple lines you have to set AcceptsReturn to true. The TextBox control allows the user to input values. If the control gets disabled it will not be grayed out (while a Label will). The TextBlock control is a control that allows you to display some text. The RadioButton control allows you to give some options but only one from the same GroupName will be selectable at a time. The easiest way is to send the password control as a parameter in a command, for example: Īnd then on the button execute method cast the parameter to a PasswordBox and get the property Password from it. To be able to read the password the user entered you need a different approach. It also stores the input into a SecureString object. The PasswordBox control allows you to mask the user input. The label control has a special feature that allows you to specify an access key: PasswordBox If the control gets disabled it will be grayed out (while a TextBlock will not). The Label control is a control that allows you to display some text. And by binding SelectedItem you can get the selected object on your model. The ComboBox control allows you to bind a list of objects that are going to be available to select. You can set IsThreeState to it and handle a third checkbox state ( null value). The CheckBox control allows you to check/uncheck and “half-check”. However in MVVM you will want to bind button actions to an ICommand. And then you can generate a handler for it.
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