asp.net - How to Insert checkbox checked text to textbox as 1,2,3 using vb.net? -

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possible duplicate:
i have 4 checkboxes , 1 textbox in webform if type in textbox 1,2 checkbox1 & 2 checked !

how insert checkbox checked text textbox 1,2,3 using vb.net ?

i have 3 checkboxes , 1 textbox

when check checkbox 1 , 3 in textbox appear 1,3 ?

i want asp.net (vb) coding !!

check if works in vb.

private sub check1_checkedchanged(byval sender system.object, byval e system.eventargs) handles check1.checkedchanged if (check1.checked) then
textbox1.text = textbox1.text + "1"
end if
end sub 

private sub check2_checkedchanged(byval sender system.object, byval e system.eventargs) handles check2.checkedchanged     if (check2.checked)                                                                    textbox1.text = textbox1.text + "2"                                                 end if                                                                              end sub                                                                                  private sub check3_checkedchanged(byval sender system.object, byval e system.eventargs) handles check3.checkedchanged     if (check3.checked)                                                                    textbox1.text = textbox1.text + "3"                                                 end if                                                                              end sub

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