` for column 0 to CheckBox:
>
> ``` xojo
> ListBox1.ColumnTypeAt(0) = WebListBox.CellTypes.CheckBox
> ```
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WebListBox.CSSClasses
**CSSClasses**
> Returns the instance of `WebCSSClasses` for this control allowing you to add CSS classes to and remove CSS classes from the control.
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WebListBox.EditCellAt
**EditCellAt**(row As `Integer`, column As `Integer`)
> Makes the cell at the *row* and *column* passed editable by the user.
>
> This example makes the cell value at row 0, column 0 editable:
>
> ``` xojo
> ListBox1.EditCellAt(0, 0)
> ```
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WebListBox.ExecuteJavaScript
**ExecuteJavaScript**(script As `String`)
> Executes the JavaScript passed. The JavaScript passed can call a JavaScript function in a WebPageSource control.
>
> The Xojo web framework uses EcmaScript 6 which is more strict than previous versions of JavaScript. For more details, see the [EcmaScript 6 documentation](https://www.ecma-international.org/ecma-262/6.0/).
>
> This code in the Pressed event of a Button displays an alert using JavaScript:
>
> ``` xojo
> Me.ExecuteJavaScript("alert('Hello!');")
> ```
>
> This code will select the text in a WebTextField (or WebTextArea):
>
> ``` xojo
> WebTextField1.ExecuteJavascript("document.getElementById('" + _
> WebTextField1.ControlID + "_inner').select();")
> ```
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WebListBox.FrozenColumns
**FrozenColumns** As `WebListBoxFrozenColumns`
> Returns a `WebListBoxFrozenColumns` instance allowing to indicate the amount of columns that should be locked to the left and/or right of the table.
>
> This example freezes the first 2 columns on the left side and the first column on the right side:
>
> ``` xojo
> Me.FrozenColumns.Left = 2
> Me.FrozenColumns.Right = 1
> ```
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WebListBox.GotoURL
**GotoURL**(url As `String`, inNewWindow As `Boolean` = `False`)
> Opens the passed *url* in place of the current web page or downloads a file. If *inNewWindow* is `True`, the browser is asked to open the *url* in a new window.
>
> If the browser has popup windows disabled and *inNewWindow* is `True`, the method silently fails and the page is not shown.
>
> If *inNewWindow* is `False`, the running web app is replaced with the specified *url*. If you want to display an external web site within your web app, use the `WebHTMLViewer` control.
>
> Display a web site in a new popup window:
>
> ``` xojo
> Me.GotoURL("http://www.wikipedia.org", True)
> ```
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WebListBox.HeaderAt
**HeaderAt**(index As `Integer`) As `String`
> Returns the heading of the specified column.
**HeaderAt**(index As `Integer`, `Assigns` value As `String`)
> Assigns the heading to the specified column.
>
> If you assign values to both HeaderAt and InitialValue, the first row of InitialValue is interpreted as the first row of data; otherwise, it is used as the header and the second row of InitialValue is used as the first row of data.
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WebListBox.ReloadFromDataSource
**ReloadFromDataSource**
> Reloads the data into the WebListBox.
>
> This is useful with the data in the WebListBox comes from a `WebDataSource` and that data has changed since it was last loaded into the WebListBox.
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WebListBox.RemoveAllRows
**RemoveAllRows**
> Removes all rows from the WebListBox.
>
>
>
>
>
> Important
>
>
>
> This method is not supported when a `WebDataSource` is used to display the data. The data must be edited directly through the `WebDataSource`, followed by a call to `ReloadFromDataSource
`.
>
>
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WebListBox.RemoveRowAt
**RemoveRowAt**(index As `Integer`)
> Removes the row at the *Row* passed.
>
>
>
>
>
> Important
>
>
>
> This method is not supported when a `WebDataSource` is used to display the data. The data must be edited directly through the `WebDataSource`, followed by a call to `ReloadFromDataSource
`.
>
>
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WebListBox.RowTagAt
**RowTagAt**(row As `Integer`) As `Variant`
**RowTagAt**(row As `Integer`, `Assigns` value `Variant`)
> Allows you to get or set the `Variant` value associated with the row at the *row* passed.
>
> Passing an row that is outside the bounds of the rows and/or columns will result in an `OutOfBoundsException`.
>
> This example sets the row tag at row 0, to the object Employee, an instance of a class:
>
> ``` xojo
> ListBox1.RowTagAt(0) = Employee
> ```
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WebListBox.ScrollTo
**ScrollTo**(rowIndex As `Integer`)
> Scrolls the ListBox to the specified *rowIndex* position.
>
>
>
>
>
> Warning
>
>
>
> If *rowIndex* is greater than the last row in the ListBox (WebListBox.LastRowIndex), an `OutOfBoundsException` will occur.
>
>
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WebListBox.Selected
**Selected**(row As `Integer`) As `Boolean`
> Used to get the selected state of a row.
>
> The following checks whether the first row is selected.
>
> ``` xojo
> If ListBox1.Selected(0) Then
> MessageBox("Selected")
> Else
> MessageBox("Not Selected")
> End If
> ```
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WebListBox.Selected
**Selected**(row As `Integer`, `Assigns` selected As `Boolean`)
> Used to set the selected state of a row.
>
> The following checks whether the first row is selected. If not, the first row will be selected.
>
> ``` xojo
> If ListBox1.Selected(0) Then
> MessageBox("Selected")
> Else
> MessageBox("Not Selected")
> Listbox1.Selected(0) = True
> End If
> ```
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WebListBox.SelectedRowCount
**SelectedRowCount** As `Integer`
> The number of rows selected (highlighted) in the WebListBox.
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WebListBox.SelectedRowText
**SelectedRowText** As `String`
> Allows you to get value of the selected row.
>
> Only the value in column 0 is returned.
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WebListBox.SetFocus
**SetFocus**
> Sets the focus to the `Control`.
>
> This code checks for a required value when a button is pressed:
>
> ``` xojo
> If UserNameField.Text.IsEmpty Then
> MessageBox("Please enter your UserName.")
> UserNameField.SetFocus
> Return
> End If
> ```
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WebListBox.Style
**Style** As `WebStyle`
> Returns the `WebStyle` for the control.
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**Style**(`Assigns` style As `WebStyle`)
> Assigns the *style* to the control.
>
> In this example, in any event of the control, set the text to bold:
>
> ``` xojo
> Var style As New WebStyle
> style.Bold = True
> Me.Style = style
> ```
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WebListBox.UpdateBrowser
**UpdateBrowser**
> Forces the current values of the control to be sent to the browser.
>
> This method is useful when you are computing values in a loop and wish to update the browser immediately rather than wait until the current method ends.
>
> This code iterates through a `RowSet` of `database rows`, updates a `ProgressBar` and then forces the updated `ProgressBar` to be sent to the browser via UpdateBrowser.
>
> ``` xojo
> ProgressBar1.MaximumValue = SalesData.RowCount
> For Each row As DatabaseRow in SalesData
> AnalyzeSales(row)
> ProgressBar1.Value = ProgressBar1.Value + 1
> ProgressBar1.UpdateBrowser
> Next
> ```
## Event descriptions
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WebListBox.CellAction
**CellAction**(row As `Integer`, column As `Integer`, value As `Variant`)
> The user interacted with the contents of the cell by typing in it (if its editable) or clicking if its `CellType` is CheckBox for example. For typing, it will fire when the user presses `Enter/Return` or when the control in which they are typing loses the focus.
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WebListBox.CellFocusLost
**CellFocusLost**(row As `Integer`, column As `Integer`)
> The *row*, *column* cell has just lost the focus.
>
> The user could have clicked on another cell or pressed Tab, Return, or Escape.
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WebListBox.CellFocusReceived
**CellFocusReceived**(row As `Integer`, column As `Integer`)
> The user has selected an editable cell of a ListBox.
>
> The *row* and *column* parameters indicate which cell just got the focus.
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WebListBox.Closed
**Closed**
> The control has been removed from the browser either because the page has closed or the control's Close method was called.
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WebListBox.ContextualMenuSelected
**ContextualMenuSelected**(hitItem As `WebMenuItem`)
> Called when a contextual menu item is selected. This selected item is contained in *hitItem*.
>
> This code populates a contextual menu in the Opening event of a `WebToolbar`:
>
> ``` xojo
> Var menu As New WebMenuItem
>
> menu.AddMenuItem("One")
> menu.AddMenuItem("Two")
> menu.AddMenuItem("Three")
> Me.ContextualMenu = menu
> ```
>
> The menu selection is then handled by the ContextualMenuSelected event when the user right-clicks on the control. For example, it can be of the form:
>
> ``` xojo
> Select Case hitItem.Text
> Case "One"
> MessageBox("One")
> Case "Two"
> MessageBox("Two")
> Case "Three"
> MessageBox("Three")
> End Select
> ```
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WebListBox.CustomCellAction
**CustomCellAction**(row As `Integer`, column As `Integer`, identifier As `String`, value As `Variant`)
> The user has taken some action in a cell with a `WebListBoxCellRenderer` assigned to it that triggers this event.
>
> The *identifier* parameter is an arbitrary value assigned by the subclass of `WebListBoxCellRenderer` that is assigned to the cell. The purpose of the *identifier* is to allow the developer to know what action the user took so that the code in this event can respond to it. For example, if the `WebListBoxCellRenderer` added two buttons, the *identifier* could be set to the caption of the button that was pressed.
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WebListBox.DoublePressed
**DoublePressed**(row As `Integer`, column As `Integer`)
> The user has double-clicked or double-tapped on a row.
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WebListBox.DropObject
**DropObject**(obj As `WebDragItem`, action As `WebDragItem.DragActionTypes`, x As `Integer`, y As `Integer`)
> Called when a dragged item is over a control that can accept it. The dragged item is contained in *obj* and the type of drag is identified by *action*.
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WebListBox.Error
**Error**(error As `RuntimeException`)
> An exception has occurred.
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WebListBox.Hidden
**Hidden**
> The control is about to become no longer visible. This could be because the page is being closed, is being replaced as the foreground page by another page or because the control or a parent control's Visible property has been set to `False`.
>
>
>
>
>
> Note
>
>
>
> This event is equivalent to the `DesktopWindow.Deactivated
` event in a desktop app.
>
>
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WebListBox.Opening
**Opening**
> The control has been created and the page is opening but has not been sent to the browser yet.
>
> The Opening event handler can be used to initialize non-visual properties and settings for controls.
>
> In most cases, you should use the `Shown` event to initialize controls.
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WebListBox.Pressed
**Pressed**(row As `Integer`, column As `Integer`)
> The user pressed (clicked or tapped) on the cell indicated by the parameters.
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WebListBox.RowsReordered
**RowsReordered**(newPosition As `Integer`, oldPosition As `Integer`)
> This event is called when a row is selected then moved to a new position. The `AllowRowReordering` property must be `True` in order for this event to be called.
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WebListBox.SelectionChanged
**SelectionChanged**(rows() As `Integer`)
> The selection of rows has changed.
>
> SelectionChanged is called in the following situations:
>
> - When the WebListBox is clicked to give it the focus
> - When a cell is clicked even if it already is selected
> - When a row is clicked to change the selection
> - When the selected row is removed
>
> Clicking on a header does not call the SelectionChanged event.
>
> Display data from the selected row in a TextField so it can be edited:
>
> ``` xojo
> If Me.SelectedRowIndex >= 0 Then
> Var lastName As String
> lastName = Me.SelectedRowText ' Gets the first column
>
> LastNameField.Text = lastName
> End If
> ```
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WebListBox.Shown
**Shown**
> The control has appeared on the currently displayed page. This could be because its parent page just finished loading, its parent page has come to the foreground or the control is now visible having been previously invisible because it or its parent control's Visible property has been set to `True`.
>
> Use the Shown event for initializing your controls or doing anything that would interact with other controls or user interface elements on the web page instead of the `Opening` event.
>
>
>
>
>
> Note
>
>
>
> This event is the web equivalent to the `DesktopWindow.Activated
` event.
>
>
`WebUIControl` parent class; `WebDataSource` class.