Asp.net|web| programming One. How to create a CheckBoxList component:
<asp:checkboxlist runat = "server" id = C1 >
<asp:listitem Value = 1 > first check box </asp:listitem >
<asp:listitem Value = 2 > second check box </asp:listitem >
<asp:listitem Value = 3 > Third check box </asp:listitem >
.....
Note: You can add a few check boxes here
</asp:checkboxlist >
By adding the above statement to the ASP.net page, you can produce a CheckBoxList component called "C1".
Two Properties that are frequently used in CheckBoxList components:
I. TextAlign property: The value is: left, right. If the value of the textalign is left, the text of the check box in the CheckBoxList component is on the left-hand side of the marquee, and similarly, if the TextAlign value is right the text of the check box is on the right-hand side of the marquee.
II. Selected property: Is a Boolean that determines whether the check box in the component is selected.
III. RepeatColumns property: There are several check boxes in the CheckBoxList component that basically set how many rows the check boxes are displayed in.
IV. RepeatDirection property: The value of this property can be: Vertical, horizontal. When the RepeatColumns property is set, set how this property arranges the individual check boxes in the component. Specifically as follows:
Suppose the CheckBoxList component has four check boxes, and the RepeatColumns property value is 2.
(1). If RepeatDirection = Vertical, the check box is displayed in the page as follows:
check box 01 check box 03
check box 02 check box 04
(2). If RepeatDirection = horizontal, the check box is displayed in the page as follows:
check box 01 check box 02
check box 03 check box 04
V. Count property: Returns how many check boxes are in the CheckBoxList component.
Three Methods that are frequently used in CheckBoxList components:
(1). Add a check box to the component, the syntax is as follows:
Chklist. Items. ADD (New ListItem ("text", value >))
(2). Access the check box in the component, the syntax is as follows:
Chklist. Items [Index >]
(3). Delete the check box in the component, the syntax is as follows:
Chklist. Items. Remove (Index >)
