c# - ComboBox.DropDownHeight values doesn't change when adding or removing items -


when running following code in wfa

public partial class form1 : form {     string[] items = { "a", "b", "c", "d", "e" };      public form1()     {         initializecomponent();         updatedropdownheight();     }      private void updatedropdownheight()     {         textbox1.text = combobox1.dropdownheight.tostring();     }      private void button_populate_click(object sender, eventargs e)     {         for(int = 0; i<items.length; i++)         {             combobox1.items.add(items[i]);         }         updatedropdownheight();     }      private void button_clear_click(object sender, eventargs e)     {         combobox1.items.clear();         updatedropdownheight();     } }

i have noticed combobox1.dropdownheight value never changes when new items added combo box. apparent drop down area changes when button_populate clicked through.
users question

combo box size issue after items removed

provides perplexing answer on how resize apparent drop down area after removing items. purpose of dropdownheight property , changing apparent drop down area of combobox?

also not sure problem you're trying solve, if you're trying adjust height of dropdownheight, can achieved below.

private void updatedropdownheight() {     int dropdownheight = 0;     (int = 0; <= combobox1.items.count; i++)     {         dropdownheight = dropdownheight + (combobox1.itemheight);     }     combobox1.dropdownheight = dropdownheight;     textbox1.text = combobox1.dropdownheight.tostring(); }

Comments

Post a Comment

Popular posts from this blog

Rendering JButton to get the JCheckBox behavior in a JTable by using images does not update my table -

i rendering jbutton image on simulate jcheckbox behavior. why don't let jtable render jcheckbox? because need bigger checkboxes , there's no way can resize them (as far know). so, have own table cell renderer , editor. both renders jbutton , checkbox images on them. trying change image checked image unchecked image (or vice versa) , update cell value (boolean true or false). however, reason, getcelleditorvalue() not update table. so, release mouse, value goes original one. any appreciated! lot! public class tableexample extends jframe { jscrollpane pane; jpanel panel; jtable table; object[][] data; mytablemodel tm; renderer buttoncolumn; public tableexample(object[][] data) throws ioexception { string[] columns = {"column#1", "column#2", "column#3", "column#4", "column#5", "column#6"}; this.data = data; this.setpreferredsize(new dimension(700, 500)); ...
Read more

javascript - Using jquery append to add option values into a select element not working -

i'm looking dynamically populate select element names of items stored array. for reason it's not working , i'm not sure why. html: <div class="col-md-4 col-md-offset-4"> <select class="select1"> </select> , <select class="select2"> </select> </div> note i'm using bootstrap layout. here's jquery i'm using try , populate ".select1" jquery: select: function() { $.each(state.greens, function(index, value) { $(".select1").append("<option value =' " + index + " '>" + state.greens[index].name + "</option>"); }); } note function 'select' stored within object called 'display'. state.greens name of array i'm trying access. so @ end of html page call display.select(); call function. no error messages showing in console. also, saw question: appending ...
Read more

user interface - how to replace an ongoing process of image capture from another process call over the same ImageLabel in python's GUI TKinter -

i trying use following code create interactive gui changes color-space(hsv, rbg, grayscale etc) on event of button click. display opencv video in tkinter using multiprocessing being new python having problems multiprocessing , attempts on making gui change it's color space on button clicks hangs entire system. on it's implementation highly appreciated. thankyou. below code: import cv2 pil import image,imagetk import tkinter tk import numpy np multiprocessing import process , queue def quit_it(root,process): root.destroy() process.terminate() def black_andwhite(root,process): process.terminate p=process(target=capture_image, args=(5,queue, )) p.start() root.after(0, func=lambda: update_all(root, image_label, queue)) def update_image(image_label, queue): frame = queue.get() = image.fromarray(frame) b = imagetk.photoimage(image=a) image_label.configure(image=b) image_label._image_cache = b root.update() def update_all(root...
Read more