drop-down-menu

问题 I would like to be able to allow a user to "filter" the contents of an HTML page from a drop down menu. I have minimal coding skills but maintain a simple website produced using Emacs org-mode. (easy to assemble pages and produce different versions of the same content using tags.) The output is simple HTML. I can easily produce different versions of a page and make them selectable with a drop down menu to move between them, but this means I have different versions of the same content on my

问题 I have two dropdown in html page.1st dropdown Contain Class-1, class-2,class3.. and 2nd dropdown contain StudentNameID for selected Classes. I wanted to multiple selection for classes in first dropdown and respective classes manage second dropdown selection for studentID. 1st Dropdown-want mutiple selection <select> <option value=".$row['classID'].">Class-1</option> ....like wise generate dropdown... <option>Class-2</option> <option>Class-3</option> <option>Class-4</option> </select> 2nd

问题 I am unable to set default value for a dropdown while loading forms. Here is the code state = forms.TypedChoiceField(choices = formfields.State) State = ( ('QC_APPROVED','QC_APPROVED'), ('REVERT','REVERT'), ('FIXED','FIXED'), ) If I want to make the default state as FIXED. I am writing this code state = forms.TypedChoiceField(choices = formfields.State, default = 'FIXED') If I execute the above code I am getting the below error. Exception Value: __init__() got an unexpected keyword argument

问题 I'm working on a mat-table which implements pagination, filtering, selection, etc. I have this mat-select on one of the header columns which I use to set a global value for all the other mat-select on the same column... Like this Everything works good so far, but lets say I choose a global value, and then I increase the pageSize of the table, the rows that already had the selection will stay that way, but the new additional rows will have the default value; now if I go to the global mat

问题 I have been trying to get a QComboBox in PyQt5 to become populated from a database table. The problem is trying to find a method that recognizes a click event on it. In my GUI, my combo-box is initially empty, but upon clicking on it I wish for the click event to activate my method for communicating to the database and populating the drop-down list. It seems so far that there is no built-in event handler for a click-event for the combo-box. I am hoping that I am wrong on this. I hope someone

问题 In a jsp page ,I am presenting the customer with drop down lists to select creditcardtype,expiration month,expiration year of credit card. I am looking at ways the necessary strings for this can be put ,other than hardcoding them in html. thanks mark <tr> <td> <select id="creditCardType" title="select card type" name="creditCardType"> <option value="M0">MasterCard</option> <option value="D0">Discover</option> <option value="J0">JCB</option> <option value="I0">Diners Club</option> <option

问题 We need to create a hierarchical drop-down list in R shiny. The list will have at least 3 levels. Could you please help me in identifying the correct library for this? Please refer the below pic for your reference.Currently we are using the below code.But we are getting incorrect columns in the drop-down. ui.R library(shiny) library(shinydashboard) library(shinyTree) shinyUI( shiny::fluidPage( h3('Countries '), shinyTree("tree", checkbox = TRUE), verbatimTextOutput("x") ) ) server.R library

问题 We need to create a hierarchical drop-down list in R shiny. The list will have at least 3 levels. Could you please help me in identifying the correct library for this? Please refer the below pic for your reference.Currently we are using the below code.But we are getting incorrect columns in the drop-down. ui.R library(shiny) library(shinydashboard) library(shinyTree) shinyUI( shiny::fluidPage( h3('Countries '), shinyTree("tree", checkbox = TRUE), verbatimTextOutput("x") ) ) server.R library

问题 I want to display two text strings depending on a user's selection from two drop down lists. So there are two drop down options: For each month option, I want to have a corresponding value. So for January option, the value would be "January Name." For each color option, there is also a corresponding value. So for green option, the value is "Green name." Once the user selects both options (month AND color), I want the output to display a text with the concatenation of the two values. So for

问题 I'm trying to scrape the following website link I need to automate the following steps: 1) Select the correct drop down table (the first on the left you see un the image below). 2) Select an option from the drop down menu (Caraibi option). 3) Click on the search button. Drop down images: The first on the left ("Dove vuoi andare?"). The HTML code is the following one: <select name="ctl00$ctl00$ctl00$ctl37$g_7e88f2a7_c220_4ba6_8ca8_49ca1297d22a$cruiseFinderControl$ddl_MacroArea" onchange=