Return value of checkbox.

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In ASP.net is the following code right ?

VB

Dim r1 As Bollean = rd1.checked

returns what type of value?

then when I put this following code---

VB

If Request.QueryString("r1") = True Then
     myReportDocument.Load(Server.MapPath("Gradewise.rpt"))
End If'

It gives following error--

Conversion from string "" to type 'Boolean' is not valid.

Posted 27-Mar-13 20:58pm

Farzanatayeb

Updated 27-Mar-13 21:31pm

Thomas Daniels

v3

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Maciej Los · Answer 1 · 2013-03-27T21:59:00

Have a look here: Checkbox.Checked property (web.ui.webcontrols)[^] and here: FindControl method[^]

VB

Dim myCbx As Control = CType(FindControl("CheckBox1"),CheckBox)
If Not myCbx Is Nothing AndAlso myCbx.Checked Then DoSomething()

Other resources: How to: Access Server Controls by ID[^]

Raviteja Aytha · Answer 2 · 2013-03-27T22:14:00

Solution 3

VB

Dim r1 As Bollean = rd1.checked

the output of this will be a string but boolean will not accept string characters so use it in below way.

Dim r1 As Bollean = Convert.ToBoolean(rd1.checked)

Posted 27-Mar-13 22:14pm

Raviteja Aytha