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In ASP.net is the following code right ?
Dim r1 As Bollean = rd1.checked 
returns what type of value?
 
then when I put this following code---
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 21:58pm
Edited 27-Mar-13 22:31pm
ProgramFOX131.8K
v3
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Solution 2

Have a look here: Checkbox.Checked property (web.ui.webcontrols)[^] and here: FindControl method[^]
 
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[^]
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Solution 3

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)
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