Open the Phone number on phone pad when the link is clicked

Set the text to be whatever text you want and the PostBackURL to the tel link:

eg:
  <asp:LinkButton runat="server" ID="lb1" PostBackUrl="tel:8585551212" Text="Dial Me"></asp:LinkButton>

you can also control these properties from the code behind.

Thank you very much for you reply. I do not want static values. I want something like this. But it does not work.

<asp:linkbutton ID="lblMobilePhone" runat="server" href='<%# String.Format("tel:" & lblMobilePhone.Text)%>'></asp:linkbutton>

Phone number is coming from the DB. I want the same number to pop up.

Thanks.

<asp:LinkButton runat="server" ID="lb1" PostBackUrl='<%# String.Format("tel:"& lblMobilePhone.Text)%>' Text='<%#  lblMobilePhone.Text %>' ></asp:LinkButton>

You have to set both the post back URL and the text url.

Also you should be binding to the source directly, not to some other control.

MVC or Webforms . . . you might be better of just doing this from the code behind when you get the response back from the DB.

Can u please tell me how to do it code behind?
This is my code.
Dim cmd As New SqlCommand
            cmd.CommandText = "Select * from CUSTCONTACT where Id=" & ContactID
            con.Open()
            cmd.Connection = con
            Reader = cmd.ExecuteReader()

            While Reader.Read
                 lnkHomePhone.Text = Reader.Item("HomePhone").ToString
             End While
            con.Close()
               

Thanks.

I would change your code to following

I am not sure if telephone bit will work but atleast it will be more efficient

Dim cmd As New SqlCommand
            cmd.CommandText = "Select Top 1 HomePhone from CUSTCONTACT where Id=" & ContactID
            con.Open()
            cmd.Connection = con
            Dim Phone as Object = cmd.ExecuteScalar()

            If Not IsDBNull(Phone) Then
                 lnkHomePhone.Text = "tel:" & Phone
             End If
            con.Close()

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Thank you for your reply. But it is not working. When I give lnkHomePhone.Text = "tel:" & Phone, It is coming as "tel:219-545-5240" .

Thanks.

Does it work if you modify the HomePhone field in DB to contain a valid phone number (starting with 0 or 00, no spaces or dashes etc)?

It worked!! Thank you very much for your help.