Show date in yyyyMMdd format in Label inside GridView using C# in ASP.Net

hi

refer below thread

http://www.aspforums.net/Threads/783562/Show-date-in-yyyyMMdd-format-in-GridView-in-ASPNet/

I used below code to show date in correct format:

Text='<%#toPersianNumber(Eval("sendDate", "{0:yyyy/MM/dd}"))%>'

now I want use it for:

 Lbldate.Text = toPersianNumber(_dr["senddate"].ToString());

How I can do it?

Best regards

Neda