Form Control: 表单中的单个输入元素,如输入框、选择框等。 Disabled: 当一个表单控件被设置为禁用时,用户无法与之交互,且其值不会被提交。 Value Changes: 一个 Observable,它会发出表单控件值的每次变化。 为什么禁用控件的值不会发出? 禁用的控件在表单模型中是不可变的,即它们的值不会被改变,也不会被提交...
如果输入指令所做的更改没有触发变更检测,FormControl可能不会检测到更改。可以尝试手动触发变更检测,使用ChangeDetectorRef的detectChanges方法。 输入指令未正确更新FormControl的值:确保输入指令正确更新FormControl的值。可以通过调用FormControl的setValue或patchValue方法来更新值。 输入指令未正确注册:确保输入指令已...
exportfunctionsetUpControl(control:FormControl,dir:NgControl){// initialize a form control// 调用 writeValue() 初始化表单控件值dir.valueAccessor.writeValue(control.value);// setup a listener for changes on the native control// and set this value to form control// 设置原生控件值更新时监听器,每...
Form Control Classes Methods on Form Controls Event Method Sequences when the Value of a Control Changes .NET Controls ActiveX Controls Applying Country/Region Specific Functionality How to: Set a Form Control to be Country/Region Specific Parts Menus and Menu Items Wizards Alerts Using the Office...
Form Control Properties Form Control Classes Methods on Form Controls Event Method Sequences when the Value of a Control Changes .NET Controls ActiveX Controls Applying Country/Region Specific Functionality How to: Set a Form Control to be Country/Region Specific Parts Menus and Menu Items Wizards ...
Additionally, if we wish to support the same state changes in ControlValueAccessor, we would be duplicating a lot of individual cases.Proposed solutionWe could introduce a new observable (and still support valueChanges and statusChanges for backwards compatibility) containing all events produced in ...
The ViewForm function changes the Form control's mode to FormMode.View. In this mode, the contents of the Form control's Item property are used to populate the form. The SubmitForm and ResetForm functions have no effect when in this mode....
The following example shows how the selectionChange method can be overridden to display an Infolog message when the user changes the selected item in the combo box control. X++ 複製 public int selectionChange() { int ret; info("The selection has changed."); ret = super(); return ret;...
control" id="user_password" name="user[password]" type="password"> <small class="form-text text-muted">A good password should be at least six characters long</small> </div> <div class="form-check mb-3"> <input autocomplete="off" name="user[remember_me]" type="hidden" value="0"...
Specifies the type of the form control.C# 複製 public enum XlFormControlInheritance Enum XlFormControl Fields展開資料表 NameValueDescription xlButtonControl 0 Button. xlCheckBox 1 Check box. xlDropDown 2 Combo box. xlEditBox 3 Text box. xlGroupBox 4 Group box. xlLabel 5 Label. xlListBox...