Usage of ComboBox:1.ComboBox bound DataTableDataTable dt = _product. GetCode (Cbbcategory.text); // declaring a Datatabble object and assigning a valueComboBox1. DataSource = DT; // Binding a DataTableComboBox1 . DisplayMember = dt. columns["code"]. ToString (); // set the columns for the DataTable to be displayed2. Add directly using the Add ()foreach (string in color) { ComboBox1.Items.Add (col);}Usag
that they are arranged horizontally.
How are these three guys handsome.
The next step is to manually add items, which is simpler. You can see the following XAML.
This is the case after running:
ComboBox
In fact, it is the same as ListBox, but it is a drop-down list box. The item list corresponds to the comboboxitem class.
Consider the following example. Let's put some stuff in ComboBox
The ComboBox label is used to generate a combo box (Combo). The ComboBox is characterized by the option to be editable. You can select a value that is already in the drop-down box, or you can fill in a value that is not in the drop-down box. The code is as follows:1 2 ListString>favouritelist= NewArrayListString>(); //List Object3 4 Favouritelist.add ("Apple"); //Add Data5 Favouritelist.add ("Orange");6 Fav
ComboBox data-bound list lists a collection of values that differentiate between display values and selectionsOverall effect:Print selected values and display values separately according to the ComboBox selectionCode:Windows Forms:1 Windowx:class= "Comboxbinding.mainwindow"2 xmlns= "Http://schemas.microsoft.com/winfx/2006/xaml/presentation"3 xmlns:x= "Http://schemas.microsoft.com/winfx/2006/xaml"4 Title= "C
From: http://hi.baidu.com/%C4%BE%D2%B6%C1%B5/blog/item/9fd0e609cea3443de82488ce.html
Today, many people in csdn asked a question about the problem that the combo box drop-down list in VC does not display data. They added data correctly, however, clicking "combo box" at run time does not display data. The reason is very simple. When using the combo box control, there is a setting to display the size of the List area. The default display area is too small, therefore, data cannot be displayed. A
Combobox must have text and value ~
Steps:
1. Set the data source for combobox ~
ComboBox1.DataSource = list;
List is the data source you want to give to comboBox.
2. Set the text value for comboxBox: comboBox1.DisplayMember = "name"; // all the name field attributes in the set are text
3. Set the value of the header comboxBox: comboBox1.ValueMember = "id"; //
A common binding of ComboBox is to bind a dataset to it. But if you bind an ilist to it, you have a skill.
If your ilist is list Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Defines a class and has two attributes.
Public class valueobject {
Private string _ name;
Private string _ value;
Internal name
{
Get {return _ value ;}
Set {_ value = value ;}
}
}
Then, useArraylist list = new arraylist ();For
Add a validating event to combbox, Code As follows:
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> // If the input value does not exist in commbobox, select the first item. If the list is empty, clear the input. // Usage: Add the following line of code to the validating event of ComboBox: // Commonfunctions. comboboxselectonly (ComboBox) sender );
Create combobox dynamically in JS
I have not written JavaScript code in my usual learning process. Because I am not familiar with it, I am more or less afraid of JS Code. When I arrived at the company, the overwhelming JS Code was simply dumbfounded. In the world where JavaScript code is used all over the world, I have learned a little bit about it. I would like to warm up with a small feature:
Use JS Code to dynamically create a comboboxThe funct
Http://blog.163.com/prince.king_521/blog/static/1068912042010101051555903/
Directly run the code. Data of the keyvaluepair The Code is as follows:
/// /// Obtain the data source/// /// Private list {List For (INT I = 0; I {Keyvaluepair List. Add (item );}Return list;}/// /// Bind the list data to ComboBox/// Private void binddata (){ComboBox cmbtest = new ComboBox
When using the ComboBox control in extjs, you can easily implement the prompt content by changing the TPL content. For example, in the official example Examples \ form \ combos.html, You can implement the prompt information for selecting the ComboBox content:
Since the information text can be displayed, of course, the image can be displayed. This can be achieved through testing.
PartCodeAs follows:
Va
Reprinted from: http://www.21ds.net/article/21/26299
In winform, ComboBox is compared with dropdownlist in web control, so I never know what value is in ComboBox? Valuemember can only be used for binding, while selectedvalue can only take the value bound from the database. I can only define one class to implement the manual addition of ComboBox item
Public
The ComboBox control displays the text box editing fields combined with a ListBox, allowing you to select items from the list or enter new text.
If you do not need to enter new text, you can set it to read-only. Strictly speaking, you should select only.
ComboBox is set to read-only, not the readonly attribute. ComboBox does not have this attribute,
Instead, s
In the latest version 1.3.3 of jquery-easyui, if the multiple choice mode is set in ComboBox, an error will be reported in IE8 when the option is canceled, but not in chrome Firefox when the option is disabled, we can see that the error code is in line 10650.
Function _ 7e8 (_ 7e9, _ 7ea) {VaR _ 7eb = $. data (_ 7e9, "ComboBox"); var opts = _ 7eb. options; VaR _ 7ec =$ (_ 7e9 ). combo ("getvalues"); VaR _
After the ComboBox is bound, a series of "memory protection" errors may occur in dynamic data changes, and some things written by foreigners are accidentally discovered.
That is to say, in the case of static binding, the ComboBox option is added without changing the data source. Here, an error is returned when ComboBox. Items. Add is used.
The content of the test
About ExtJS combobox in IE can not display the problem to solve, we have been analyzed to achieve, and finally to solve the solution. Look at the example below.
The data in ComboBox is populated by server-side data, and a lot of the online examples are just a few, as followsvar companies = new Ext.data.JsonStore ({URL: '/company/getcompanies/',Root: ' Companies ',Fields: [{name: ' CompanyID '}, {name
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