dropdown

问题 i want dropdown of stages in flutter which values come from sqflite database. the sample value in json is in below format and these values are store locally. there are two dropdown if i select 'teacher' pipeline then it's id 54 was passed to future builder of stages's dropdown and i want to select one stage. { "id": 54, "name": "teacher", "stages": "{\"advertise\":false,\"interview\":false}", "created_at": "2019-08-23 20:11:54", "updated_at": "2019-08-23 20:12:48", "deleted_at": null }, the

问题 I need use a string as a value in the flutter dropdown. But returns Another exception was thrown: 'package:flutter/src/material/dropdown.dart': Failed assertion: line 609 pos 15: 'items == null || items.isEmpty || value == null || items.where((DropdownMenuItem item) => item.value == value).length == 1': is not true. Full log here. The code is items: dataMaker.map((item) { return new DropdownMenuItem<String>( child: new Text(item['fabricante'], textAlign: TextAlign.center), value: item[

问题 I need use a string as a value in the flutter dropdown. But returns Another exception was thrown: 'package:flutter/src/material/dropdown.dart': Failed assertion: line 609 pos 15: 'items == null || items.isEmpty || value == null || items.where((DropdownMenuItem item) => item.value == value).length == 1': is not true. Full log here. The code is items: dataMaker.map((item) { return new DropdownMenuItem<String>( child: new Text(item['fabricante'], textAlign: TextAlign.center), value: item[

问题 Here's my dropdown: <select class="form-control form-controls input-sm" ng-model="vm.retailer.state" ng-options="state.code as state.name for state in vm.states" required> <option value="">-- Select a State --</option> </select> Here's just the first state in the data: "State": [ { "code": "AL", "name": "Alabama" }, Here's what's being rendered in the HTML: <select class="form-control form-controls input-sm ng-pristine ng-invalid ng-invalid-required ng-touched" ng-model="vm.retailer.state" ng

问题 I am very new to JQuery, please consider me as a novice. I have a PHP form where in I have a Radio button. Based on the which radio is selected I would like to disable the select / dropdown. Below is the scenario: Radio Button: Daily and Misc Select: Deity Name If the user selects Misc then Select (Deity Name) should be disabled and vice versa. I have already imported the JQuery on my page. Header.php !-- JQuery 1.12.3 JS --> <script src="../js/jquery-1.12.3.min.js"></script> HTML Code <tr>

问题 I have a simple form like this: I open the combobox and at the time dropdown is open, I click the button. On button click I show a simple message but the message is not shown at that time. It shows when I click it again. The same problem for textbox. When the dropdown is open, the textbox click is not working. Why does combobox prevent clicking other controls when it is open? 回答1: You can create an event for ComboBox DropDownClosed and with the hittestfunction, find the other control that the

问题 I have a simple form like this: I open the combobox and at the time dropdown is open, I click the button. On button click I show a simple message but the message is not shown at that time. It shows when I click it again. The same problem for textbox. When the dropdown is open, the textbox click is not working. Why does combobox prevent clicking other controls when it is open? 回答1: You can create an event for ComboBox DropDownClosed and with the hittestfunction, find the other control that the

问题 I want to have a ComboBox with the following entrys: {"0,5", "1", "1,5", "2", "2,5"} I use DataValidation: DataValidation dataValidation = null; DataValidationConstraint constraint = null; DataValidationHelper validationHelper = null; validationHelper = new XSSFDataValidationHelper(sheet); CellRangeAddressList addressList = new CellRangeAddressList(row, row, col, col); constraint = validationHelper.createExplicitListConstraint(list); dataValidation = validationHelper.createValidation

问题 This is my first ever post to Stack Overflow and I'm not familiar with forum regulations with posting. So please let me know anything that I have done wrong. I have researched this issue in the forums and nothing I've come across gives me a clear answer. I am trying to create a dropdown menu from the "News" element, but I never get any visible result when running the code. I tried to change the .dropdown-content 's display value to block to see if it would make the list visible, but nothing

问题 I'm don't understand how to create nested dropdowns for a navbar menu. I would like to use buttons and divs (and not lists/links/bootstrap). I built something I think is correct here but of course I can't get it working. Could someone please help me get the dropdown & nested dropdown to work :) .dropdown { background: white; float: left; } .dropdown .dropdown { position: absolute; left: 0; top: 100%; visibility: hidden; opacity: 0; } .dropdown .dropdown .dropdown { left: 100%; top: 0; }