Checkbox null values

Dealy

Hello,

I have the following code that works if the values are true/false. If I have a null value I get an exception.

"cbApproved" Checked='<%# Convert.ToBoolean(Eval(ValApproved")) %>' runat="server"/>

Any ideas how to fix that?

Thank you in advance.

6 Replies

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Vinay Singh10y ago
Accepted answer
hi use condation in your code
for detail check the link
http://stackoverflow.com/questions/16465749/how-to-get-checkbox-working-with-itemtemplate
+1
Rajeesh Menoth10y ago
Hi,
Welcome :)
The answer is helpful. Then please accept it..!!
0
Dealy10y ago
That works thank you!
0
Rajeesh Menoth10y ago
Hi,

Welcome :)

Instead of null add true in your code.Please check the updated answer in my first solution.!!
Checked='<%# Convert.ToBoolean(Eval(ValApproved")) != true ? false : Convert.ToBoolean(Eval(ValApproved")) %>'
+1
Dealy10y ago
Thank you both for your answers.
@Rajeesh MenothI get this messge before compiling the code "The result of this expression is always 'false' since a value of type bool is never equal to 'null' of type 'bool'.
@Vinay SinghI get this error --"Specified cast is not valid."
0
Rajeesh Menoth10y ago
Hi,

Use Ternary Operator in c#.

Try this :
<ItemTemplate>
    <asp:CheckBox ID="cbApproved" Checked='<%# Convert.ToBoolean(Eval(ValApproved")) != true ? false : Convert.ToBoolean(Eval(ValApproved")) %>' runat="server"/>
ItemTemplate>
Reference :

http://www.dotnetperls.com/ternary
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