linq - ASP.NET Convert Invalid String to Null -

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in application have textbox in formview bound linqdatasource so:

<asp:textbox id="mytextbox" runat="server"               text='<%# bind("myvalue") %>' autopostback="true"               ontextchanged="mytextbox_textchanged" />  protected void mytextbox_textchanged(object sender, eventargs e) {     myformview.updateitem(false); }

this inside updatepanel change field persisted. also, value of myvalue decimal?. works fine unless enter string cannot converted decimal field. in case, updateitem call throws:

linqdatasourcevalidationexception - failed set 1 or more properties on type mytype. asdf not valid value decimal.

i understand problem, asp.net not know how convert 'asdf' decimal?. convert these invalid values null. best way this?

i think should handle updating event of linqdatasource on page. check invalid strings (use tryparse method or something) , continue base class update.

(edit: intuition lines what's recommended here)


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