Question

I am trying to add a link with parameters only if certain things are retrieved from the database.

Here is my code:

protected void GetOrderLines (string OrderID)
{
    string query;
    query = "SELECT ol.ItemId, ol.Amount, ol.Quantity, i.description, ol.RetailPrice, o.OrderDate";
    query += " FROM Distributor d";
    query += " INNER JOIN Orders o";
    query += " ON o.DistID = d.DistID";
    query += " INNER JOIN Orderlines ol";
    query += " ON ol.OrderID = o.OrderID";
    query += " INNER JOIN Items i";
    query += " ON i.InventoryID = ol.ItemID";
    query += " WHERE ol.OrderID = " + OrderID;
    query += " AND ol.GroupItem = 0";
    query += " AND d.DistID = " + Session[ "Distid" ];

    DataTable data = GeneralFunctions.GetData( query );

    RepeaterOrderlineInfo.DataSource = data;
    RepeaterOrderlineInfo.DataBind();
}

Here is the data it gives me:

ItemId  Amount  Quantity    description RetailPrice OrderDate
6015    660 1   Item 1  660 5/1/2012
6021    199.2   332 Item 2  0.6 5/1/2012
6018    150 6   Item 3  25  5/1/2012
9000    85  4   Technical Support   21.25   5/1/2012
8000    125 4   Custom Programming and Misc. Fees   31.25   5/1/2012

Here is the Eval code on the page:

<asp:Repeater ID="RepeaterOrderlineInfo" runat="server">
    <ItemTemplate>
        <tr>
            <td>
                <%# Eval("Itemid") %>
            </td>
            <td>
                <%# Eval("description") %>
            </td>
            <td align="right">
                <%# Eval("RetailPrice", "{0:C}") %>
            </td>
            <td align="right">
                <%# Eval("Quantity") %>
            </td>
            <td align="right">
                <%# Eval( "Amount", "{0:C}" )%>
            </td>
        </tr>
    </ItemTemplate>
</asp:Repeater>

I am trying to build a link for the <%# Eval("Description") %>

<a href="SupportSummary.aspx?sd="<%# Eval("OrderDate") %>&ed=<%# Eval("OrderDate") //- 1 month %>"><%# Eval("Description") %>

I only need the description to be a link if the description = "Technical Support". Is this possible when using a repeater?

So the main things I am seeking here are:

How to Eval the OrderDaye and subtract one month.
How to do a condition on the description only if it = “Technical Support”.

Answer 1

If you add a method to your code-behind, you can call it like this in your repeater:

<%# MyMethod(Eval("Description"),Eval("OrderDate")) %>

The method would be something like this:

protected string MyMethod(object description, object orderDate)
{ 
    string link = String.Empty;

    // conditions, assign link if needed

    return link;
}