drop-down-menu

问题 I have an MVC 5 view with a search filter textbox, a search filter date dropdownlist, several sortable columns and using PgedList. Everything is working perfectly except I would like the DropDownList to maintain it's selection as the results are navigated from page to page. The filtering by the date Dropdown works just fine and is retained from page to page but I haven't figured out how to stop the dropdown list from reverting to the top selection "All" on subsequent pages (even though the

问题 Am working on a Single Page Application using Angular 8 on the frontend and Laravel on the backend. I have got a form which has input text field and a dropdown list. The values on the text input fields are being captured well on the typescript file but am having a problem capturing the value selected from the drop down list so that I can submit on the backend.. ~ Kindly assist? Create.component.html <form #createForm=ngForm (ngSubmit)="onSubmit()"> <div class="form-group row"> <div class="col

问题 I have an issue with the data which is sent from a drop down menu, the selector only returns a single value, even when multiple values are selected. I have searched online for a solution to this, but they all use PHP, JQuery or some method outside the scope of the course I am taking; to capture multiple selected items. I have tried .value of the individual options, but that returns all of the options rather than just the ones which are selected. Is there some kind of trick to sending multiple

问题 I have the following codes that works successfully with js but don't under jquery (precisely jquery mobile 1.4.5). let me describe it : In js folder I have json list that I put into a function function JsonList(){ var Food = //4 elements json format [ { "name": "Food1", "Glc": 2, "Lip": 0.2, "Prot": 0.5, "IG": 20 }, { "name": "Food2", "Glc": 4, "Lip": 1.2, "Prot": 0.7, "IG": 40 }, { "name": "Food3", "Glc": 5, "Lip": 0.32, "Prot": 0.76, "IG": 60 }, { "name": "food4", "Glc": 7.5, "Lip": 1.5,

问题 I have two items in dropdown. I need to set initial value as first value from array below is my code objects = ['production', 'development']; this.object = this.objects[0]; <div class="item"> <select formControlName="db" class="form-control" (change)="changeDb($event)" [ngModel]="object"> <option *ngFor="let object of objects" [ngValue]="object">{{object}}</option> </select> </div> The value is not setting using above code.It is showing in ng reflect model but not in UI 回答1: You can add an

问题 Super Rails n00b here: Currently I have a form with the following code: <%= f.collection_select :account_ids, @accounts, :id, :name, include_blank: true %> and it currently works how I want it to but now I would like to have multiple drop down menus so I can select multiple accounts. I do not want the multiple select to be on the same dropdown. If I do this: <%= f.collection_select :account_ids, @accounts, :id, :name, include_blank: true %> <%= f.collection_select :account_ids, @accounts, :id

问题 This question already has answers here : Delete repeated results from MySQL query (5 answers) Closed 5 years ago . How do i stop the query for my dropdown from repeating as in the picture below? Please select CD Price: <select name="CDPrice"> <option value=""> <?php include 'database_conn.php'; if (!( is_object($conn) && ( get_class($conn) == 'mysqli' ))) { die("DB connection failure."); } $rsCDprice = mysqli_query($conn, "SELECT nmc_cd.CDPrice FROM nmc_cd"); if (!$rsCDprice) { die("No result

问题 This question already has answers here : Delete repeated results from MySQL query (5 answers) Closed 5 years ago . How do i stop the query for my dropdown from repeating as in the picture below? Please select CD Price: <select name="CDPrice"> <option value=""> <?php include 'database_conn.php'; if (!( is_object($conn) && ( get_class($conn) == 'mysqli' ))) { die("DB connection failure."); } $rsCDprice = mysqli_query($conn, "SELECT nmc_cd.CDPrice FROM nmc_cd"); if (!$rsCDprice) { die("No result

问题 I'm starting my journey with Vue.js, and stumbled upon some problem. I wanted to create a simple sidebar with dropdown menu, and already got this: new Vue({ el: '#app', data() { return { openedItems: {}, selectedSub: '', userMenu: false, items: [{ icon: './src/assets/img/icons/dashboard.svg', text: 'Element 1', path: '#1' }, { icon: './src/assets/img/icons/orders.svg', text: 'Element 2', path: '#2' }, { icon: './src/assets/img/icons/products.svg', text: 'NestedElement', path: '', children: [{

问题 I'm starting my journey with Vue.js, and stumbled upon some problem. I wanted to create a simple sidebar with dropdown menu, and already got this: new Vue({ el: '#app', data() { return { openedItems: {}, selectedSub: '', userMenu: false, items: [{ icon: './src/assets/img/icons/dashboard.svg', text: 'Element 1', path: '#1' }, { icon: './src/assets/img/icons/orders.svg', text: 'Element 2', path: '#2' }, { icon: './src/assets/img/icons/products.svg', text: 'NestedElement', path: '', children: [{