I want to call server side web method inside href link to asmx..any help will be appericate

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C#

//Server Side Code
[System.Web.Services.WebMethod]
public static string DeleteRow(int UserId)
{
string strmsg = string.Empty;
string ConStr = ConfigurationManager.ConnectionStrings["SqlCon"].ConnectionString;
SqlConnection con = new SqlConnection(ConStr);
SqlCommand cmd = new SqlCommand("delete from tblUser where MemberId=" + UserId, con);
con.Open();
//cmd.Parameters.AddWithValue("@Empid", empid);
int retval = cmd.ExecuteNonQuery();
con.Close();

if (retval == 1)
strmsg = "true";
else
strmsg = "false";

return strmsg;
}
--------------------------------------------------
\\webservice link button

sb.Append("\"<a href='ViewUserList.aspx?UserId=" + result.MemberId + "' ><span class='fa fa-trash'></a>\"");

--------------------------------------------------

<table class="table table-striped table-bordered table-hover dataTables-example" id="tblData">
                              <thead>
                                  <tr>
                                      <%--<th style="display:none;" >MemberId</th>--%>
                                      <th>UserName</th>
                                      <th>Email</th>
                                      <th>Phone</th>
                                      <th>Role</th>
                                      <th>Edit</th>
                                      <th><asp:LinkButton ID="btnDelete" Text="Delete Emp" runat="server" OnClientClick="DeleteConfirmbox(this.id);"></asp:LinkButton></th>
                          <asp:HiddenField ID="hdnMemberId" runat="server" Value='<%#Eval("MemberId") %>'></asp:HiddenField>


                                  </tr>
                              </thead>



                          </table>

What I have tried:

sb.Append("\"<a href='ViewUserList.aspx?UserId=" + result.MemberId + "' onclick = 'DeleteRow()' ><span class='fa fa-trash'></a>\"");