This document discusses the CheckBoxList control in ASP.NET. It notes that CheckBoxList is a collection of ListItem objects that can have items added through HTML or code behind. Important properties of CheckBoxList are described, including RepeatColumns to specify number of columns, SelectedIndex to get index of selected item, and SelectedValue to return value of selected item. The document provides an example of adding items to a CheckBoxList through HTML.

1. ASP.NET
CheckBoxList Control
Department of Computer
WEB – GRADE 5
Lecturer. OMEED M. M
Lecture 8

2. CheckBoxList Control
• CheckBoxList is collection of ListItem objects.
How we can add items to the checkboxlist?
• Items can be added to the CheckBoxList in the HTML source or in
the code behind file.
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3. Important Properties of the CheckBox Control
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This is CheckBoxList
This is collection of single CheckBox

4. Adding items through HTML source
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<asp:CheckBoxList ID="checkboxListEducation" runat="server"
RepeatDirection="Horizontal">
<asp:ListItem Text="Diploma" Value="1"></asp:ListItem>
<asp:ListItem Text="Graduate" Value="2"></asp:ListItem>
<asp:ListItem Text="Post Graduate" Value="3"></asp:ListItem>
<asp:ListItem Text="Doctrate" Value="4"></asp:ListItem>
</asp:CheckBoxList>
<br />
<asp:Button ID="Button1" runat="server" Text="Button"
onclick="Button1_Click" />

5. Important Properties of the CheckBox Control
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RepeatColumns property specifies the number of columns used to
lay out the items.
SelectedIndex property of the CheckBoxList control can also be
used to get the index of the selected item in the checkboxlist. But
this property, returns only one selected item, and that too, the
item with the lowest index. SelectedIndex property returns -1, if
nothing is selected.
SelectedValue property returns the selected Item's value, but only
for one selected item. If no item is selected this property returns
empty string.

6. Any Questions?
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MR. OMEED M. MOHAMMED