Ajax controltoolkit Learning Log-mutuallyexclusivecheckboxextender (17)

The mutuallyexclusivecheckboxextender control is used to select a project so that only one project can be selected. If it is not possible, you can also choose not.
See an example below:

1) Create an ASP. NET Ajax-enabled web project in vs2005 and name it mutuallyexculsivecheckboxextender1.

2) drag and drop four checkpoints on the page and set their IDs to checkbox1, checkbox2, checkbox3, and checkbox4 respectively. Set the text to bedroom, bedroom, door, and door.

CodeAs follows: 1 < BR />
2 Do & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;
3 & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;
4 & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp; Don't < BR />
5 < BR />
6 < ASP: checkbox ID = "Checkbox1" Text = "Bedroom" Runat = "Server"   />
7 & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;
8 & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;
9 < ASP: checkbox ID = "Checkbox2" Text = "Bedroom" Runat = "Server"   />
10 < BR />
11 < BR />
12 < ASP: checkbox ID = "Checkbox3" Runat = "Server" Text = "Door"   />
13 & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;
14 & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;
15 < ASP: checkbox ID = "Checkbox4" Runat = "Server" Text = "Door"   /> < BR />
16 < BR />

3) drag and drop four mutuallyexculsivecheckboxextender controls on the page and associate them with checkbox1, checkbox2, checkbox3, and checkbox4. And set some attributes.

The Code is as follows: 1 < C0: mutuallyexclusivecheckboxextender ID = "Mutuallyexclusivecheckboxextender1" Targetcontrolid = "Checkbox1" Key = "Bedroomcheckbox" Runat = "Server" >
2 </ C0: mutuallyexclusivecheckboxextender >
3 & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;
4 & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;
5 & Nbsp;   & Nbsp;   & Nbsp;   & Nbsp;
6 < C0: mutuallyexclusivecheckboxextender ID = "Mutuallyexclusivecheckboxextender2" Targetcontrolid = "Checkbox2" Key = "Bedroomcheckbox" Runat = "Server" >
7 </ C0: mutuallyexclusivecheckboxextender >
8 < BR />
9 < C0: mutuallyexclusivecheckboxextender ID = "Mutuallyexclusivecheckboxextender3" Targetcontrolid = "Checkbox3" Key = "Doorcheckbox" Runat = "Server" >
10 </ C0: mutuallyexclusivecheckboxextender >
11 < BR />
12 < C0: mutuallyexclusivecheckboxextender ID = "Mutuallyexclusivecheckboxextender4" Targetcontrolid = "Checkbox4" Key = "Doorcheckbox" Runat = "Server" >
13 </ C0: mutuallyexclusivecheckboxextender >

Attribute description:
Targetcontrolid: the checkbox associated with the control.
Key: this unique key is used to associate several checkboxes, so that these checkboxes can have at most one choice or not.

4) press Ctrl + F5 to view the effect in the browser.

This is as follows: