Transcript Creating Tables

Creating Tables
• Text Tables -created by using preformatted
tags.
• Graphical Tables - created using Table
Structure with HTML
Preformatted Tables
• Type <PRE> to use the preformatted text
tag.
• Enter the table text, aligning the columns of
the table by inserting blank spaces as
appropriate.
• Type </PRE> to turn off the preformatted
text tag.
A Text Table
This figure shows a text table.
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Graphical Tables
• Enter the <TABLE> AND </TABLE> tags to
identify the beginning and end of the table.
• Enter <TR> and </TR> tags to identify the
beginning and the end of each table row.
• Enter <TD> and </TD> to identify the beginning
and the end of each table cell.
• Enter <TH> and </TH> to identify text that will
act as table headers.
A Graphical Table
This figure shows a graphical table
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Simple Table Tags (2 x 2)
<TABLE>
<TR>
<TD>first row, first cell</TD>
<TD>first row, second cell</TD>
</TR>
<TR>
<TD> second row, first cell</TD>
<TD>second row, second cell</TD>
</TR>
</TABLE>
Table Techniques
• Start each table row on it’s own separate line.
• Indent the table cell tags three or more spaces
from the table row tags to make them easier to
read.
• Add blank spaces between table rows.
• Generously add Comment tags.
Inserting a Comment Tag
• To insert a comment into a HTML file, enter the
following tag:
<!---comment text--->
• Anything after the exclamation point is
interpreted as a comment and is not displayed by
the browser.
Table Frames and Rules
• The frames attribute allows you to determine which sides
of the table will have borders.
• The frame attribute syntax is: <table
frame=“type”>
– type is either “box” (the default), “above”, “below”,
“hsides”, “vsides”, “lhs”, “rhs”, or “void”
Effect of Different Frame Values
•
This figure shows the effect of each of the frame values on the
table grid.
Creating Frames and Rules
Continued
• The rules attribute lets you control how the
table gridlines are drawn.
• The syntax of the rules attribute is: <table
rules=“type”>
– type is either “all”, “rows”, “cols”, or “none”
Effect of Different Rules Values
Effect of Different Rules Values
Changing a Table’s Appearance
• Table Border: <TABLE BORDER=size> (size
is in pixels)
• Individual Table Cell Borders: <TABLE
CELLSPACING=size> (default is 2 pixels)
• The gap between the cell text and surrounding
cell border: <TABLE CELLPADDING=size>
(default is 1 pixel)
Aligning a Table on the Page
• Left aligned, wrapping text to the right:
<TABLE ALIGN=LEFT>
• Right aligned, wrapping text to the left:
<TABLE ALIGN=RIGHT>
• Center on the page:
Best Practice is to use CSS styles
Row Groups
• The <thead> tag is used to group the header
content in an HTML table.
• The thead element should be used in
conjunction with the tbody and tfoot
elements.
• The tbody element is used to group the
body content in an HTML table and the
tfoot element is used to group the footer
content in an HTML table.
Row Groups (continued)
• Note: <tfoot> must appear before <tbody> within
a table, so that a browser can render the foot
before receiving all the rows of data.
• The table header, table body, and table footer must
all contain the same number of columns.
• Notice that these elements will not affect the
layout of the table by default. However, you can
use CSS to let these elements affect the table's
layout.
Specifying Table Size
• <TABLE WIDTH=size HEIGHT=size>
• Size can be in either pixels or as a percentage
of the browser’s display area.
• Percentages must be enclosed in quotation
marks. Example: WIDTH = “70%”
Creating a Spanning Cell
• To create a cell that spans several columns,
enter the COLSPAN property within the
<TD> or <TH> tags as follows:
<TD COLSPAN=value> where value is the
number of columns spanned.
Creating a Spanning Cell (continued)
• To create a cell that spans several rows,
enter the ROWSPAN property within the
<TD> or <TH> tags as follows:
<TD ROWSPAN=value> where value is the
number of rows spanned.
Creating a Page Layout with Tables
• Create gutters and use cell padding to keep
your columns from crowding each other.
• Add background colors to columns to
provide visual interest and variety.
• Use the VALIGN=TOP property in cells
containing articles, to ensure that the text
flows from the top down.
Creating a Page Layout with Tables
(continued)
• Use row spanning to vary the size and starting
point of articles within your columns. Having
all articles to start and end within the same row
creates a static layout that is difficult to read.
• Avoid having more than three columns of text, if
possible. Inserting additional columns could
make the column widths too narrow and make
the text too hard to read.