Chapter 04: Using Server Controls - MCTS Exam 70-515

Lesson 1: Exploring Common Server Controls¶

Label Control¶

• AccessKey property — The key, when pressed with the Alt key, to be associated to the Label
• AssociatedControlID property — The control to associate to the label. Focus is set to this control when the user presses the AccessKey.
  

Literal Control¶

TextBox Control¶

• TextMode property — SingleLine (default), MultiLine, or Password.
• Columns and Rows properties — used with MultiLine TextMode.
• MaxLength property — limits the number of characters accepted
• Wrap property — default = True.
• TextChanged event
  

ChecBox Control¶

• TextAlign property — determines on which side of the checkbox the caption appears
• CheckedChanged event — Doesn't cause a postback unless AutoPostBack property is True.
  

RadioButton Control¶

• GroupName property — the means to group RadioButton controls
• TextAlign property — determines on which side of the checkbox the caption appears
• CheckedChanged event — Doesn't cause a postback unless AutoPostBack property is True.
  

DropDownList Control¶

• Items.Add method — to add items
• SelectedIndex and SelectedValue properties
• SelectedIndexChanged event
  

ListBox Control¶

• SelectionMode property — set to Multiple
  

Button Control¶

• Can be a submit button (default) or a command button.
• Submit button: Handle the Click event.
• Command button: Use CommandName and CommandArgument properties and handle the Command event.
  

HTML Server Controls¶

• Coded with HTML tags, with the addition of the runat="server" attribute.
  

Lesson 2: Exploring Specialized Server Controls¶

Table, TableRow, and TableCell¶

• Don't confuse Table with HtmlTable, which is an HTML Server Control.
• For static content, an HTML table is more efficient.
• To add a row: Table1.Rows.Add(new TableRow());
• To add a cell: TableRow1.Cells.Add(new TableCell());
  

Image¶

• ImageUrl — Virtual path to the image.
• AlternateText property — displayed when the image isn't found
• ImageAlign property — NotSet, Left, Right, Baseline, Top, Middle, Bottom, AbsBottom, AbsMiddle, or TextTop
• DescriptionUrl property — sets the longdesc attribute, which is used for accessibility
• GenerateEmptyAlternateText property — Setting to True generates the alt="" attribute, which is recommended for images that don't contribute meaning to the content, such as a blank or page divider images.
• NO Click EVENT!
  

ImageButton¶

• Same as Image control, but clickable
• Click event — ImageClickEventArgs contacts (X,Y) coordinates of the point clicked
• Command event
  

ImageMap¶

• Same as Image but clickable, and with an image map (usemap="#myMap" attribute)
• Has HotSpot elements (CircleHotSpot, RectangleHotSpot, or PolygonHotSpot), each with the following properties
  

Calendar¶

• SelectionChanged event — causes a postback when the user selects a date
• VisibleMonthChanged event — causes a postback when the user views a different month
  

FileUpload¶

• Does NOT cause postback when a file is selected; a postback by another control (e.g., a Button) causes the file to uploaded as posted data.
• FileBytes property — The file exposed as a byte array
• FileContent property — The file exposed as a stream
• PostedFile property — The file exposed as HttpPostedFile object.
• SaveAs method — saves the uploaded file to the server.
• Largest file allowed set by web.config/configuration/httpRuntime/MaxRequestLength
  

Panel¶

• BackgroundImageUrl property
• HorizontalAlignment property
• Wrap property
• DefaultButton property
  

MultiView and View¶

• A MultiView is a container for multiple View children, which are each container controls.
• At most one View is shown at a time.
• ActiveViewIndex property and SetActiveView method — get/set the View programmatically; If ActiveViewIndex is -1, no views are visible.
  

Wizard¶

Xml¶