ASP.NET FormView Update Fails

Question

So below is my code. Where I'm having the issue is my bound text fields are not sending the information back to the UpdateCommand as expected. If I replace any of the @variables with hard coded text then the update occurs as expected. So if I replace @RegID with '25' then my record is successfully updated but blank as all other @variables were NULL at time of update processing. Where's my error?

         <asp:FormView ID="formView" DataSourceID="Reg" runat="server" DataKeyNames="RegID" AllowPaging="true">

        <ItemTemplate>
            <h3 style="font-size:14px;"><%#Eval("Org") %></h3>
            <table border="0">
                <tr class="RowHighlight">
                    <td>Name:</td><td><%#Eval("Name") %></td>
                </tr>
                <tr>
                    <td>Phone Number:</td><td><%#Eval("PhoneNumber") %></td>
                </tr>
                <tr class="RowHighlight">
                    <td>Email Address:</td><td><%#Eval("EmailAddress")%></td>
                </tr>
                <tr>
                    <td>Address:</td><td><%#Eval("Address") %></td>
                </tr>
                <tr class="RowHighlight">
                    <td>Purchase Date:</td><td><%#Eval("MonthOfPurchase") + " " + Eval("YearOfPurchase")%></td>
                </tr>
                <tr>
                    <td>Notes:</td><td><%#Eval("Notes") %></td>
                </tr>
                <tr>
                    <td><asp:LinkButton ID="btnEdit" Text="Edit Details" runat="server" CommandName="Edit" /></td>
                </tr>
            </table>
        </ItemTemplate>

        <EditItemTemplate>
            <h3 style="font-size:14px;"><%#Eval("Org") %></h3>
            <table border="0">
                <tr>
                    <td>ID</td><td><%#Eval("RegID")%></td>
                </tr>
                <tr class="RowHighlight">
                    <td>Name:</td><td><asp:TextBox ID="txtName" runat="server" Width="100%" Text='<%# Bind("Name") %>' /></td>
                </tr>
                <tr>
                    <td>Phone Number:</td><td><asp:TextBox ID="txtPhoneNumber" runat="server" Width="100%" Text='<%# Bind("PhoneNumber") %>' /></td>
                </tr>
                <tr class="RowHighlight">
                    <td>Email Address:</td><td><asp:TextBox ID="txtEmailAddress" runat="server" Width="100%" Text='<%# Bind("EmailAddress") %>' /></td>
                </tr>
                <tr>
                    <td>Address:</td><td><asp:TextBox ID="txtAddress" runat="server" Width="100%" Text='<%# Bind("Address") %>' /></td>
                </tr>
                <tr class="RowHighlight">
                    <td>Month Of Purchase:</td><td><asp:TextBox ID="txtMonthOfPurchase" runat="server" Width="100%" Text='<%# Bind("MonthOfPurchase") %>' /></td>
                </tr>
                <tr>
                    <td>Year Of Purchase:</td><td><asp:TextBox ID="txtYearOfPurchase" runat="server" Width="100%" Text='<%# Bind("YearOfPurchase") %>' /></td>
                </tr>
                <tr class="RowHighlight">
                    <td>Notes:</td><td><%#Eval("Notes") %></td>
                </tr>
                <tr>
                    <td><asp:LinkButton ID="btnSave" Text="Save Changes" runat="server" CausesValidation="true" CommandName="Update" /></td>
                    <td><asp:LinkButton ID="btnCancel" Text="Cancel" runat="server" CommandName="Cancel" /></td>
                </tr>
            </table>
        </EditItemTemplate>

        </asp:FormView>

        <asp:SqlDataSource ProviderName="System.Data.Odbc" ID="Reg" runat="server"
            ConnectionString="DRIVER={MySQL ODBC 3.51 Driver}; SERVER=<SERVER_NAME>; PORT=3306; DATABASE=<DATABASE> UID=<USERID>; PWD=<PASSWORD>; OPTION=3;"

            SelectCommand="SELECT * FROM tblRegsitration 
            WHERE EmailSent=0 ORDER BY Org"

            UpdateCommand="UPDATE tblRegsitration SET Name=@Name, 
            PhoneNumber=@PhoneNumber, 
            EmailAddress=@EmailAddress,
            Address=@Address, 
            MonthOfPurchase=@MonthOfPurchase, 
            YearOfPurchase=@YearOfPurchase 
            WHERE (RegID=@RegID)" />

Answer 1

You don't have any parameters defined.

Example:

<asp:sqlDataSource ID="EmployeeDetailsSqlDataSource" 
  SelectCommand="SELECT EmployeeID, LastName, FirstName FROM Employees WHERE EmployeeID = @EmpID"

  InsertCommand="INSERT INTO Employees(LastName, FirstName) VALUES (@LastName, @FirstName); 
                 SELECT @EmpID = SCOPE_IDENTITY()"
  UpdateCommand="UPDATE Employees SET LastName=@LastName, FirstName=@FirstName 
                   WHERE EmployeeID=@EmployeeID"
  DeleteCommand="DELETE Employees WHERE EmployeeID=@EmployeeID"

  ConnectionString="<%$ ConnectionStrings:NorthwindConnection %>"
  OnInserted="EmployeeDetailsSqlDataSource_OnInserted"
  RunAt="server">

  <SelectParameters>
    <asp:Parameter Name="EmpID" Type="Int32" DefaultValue="0" />
  </SelectParameters>

  <InsertParameters>
    <asp:Parameter Name="EmpID" Direction="Output" Type="Int32" DefaultValue="0" />
  </InsertParameters>

</asp:sqlDataSource>