将会话或cookie变量传递到ASP.NET中的服务器标签

Question

This is probably a simple question but, it eludes me, I have a variable that I have set as a code-behind session in another page of an ASP.NET application. Let's say it is: Session["UserName"] and I want to pass it from a code behind page to the server tag. The server tag looks like this:

<asp:SqlDataSource ID="SqlDataSourceDelta" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionStringAlpha %>" SelectCommand="SELECT [ThingTitle], [ThingSynopsis], [ThingCategory], [ThingType], [ThingUserName] FROM [ThingOfSubmissions] WHERE ThingUsername = <%$ Session["UserName"] %>"

I can't use: <%$ Session["UserName"] %> directly in the server tag as shown above without it generating an error about mal formed server tags. So my question is, how can I pass this session variable or any other application variable (non SQL Server variable) into this bit of code?

Answer 1

You could just set the property in server-side code ?

SqlDataSourceDelta.SelectCommand = string.Format("SELECT [ThingTitle], 
[ThingSynopsis], [ThingCategory], 
[ThingType], [ThingUserName] 
FROM [ThingOfSubmissions] 
WHERE ThingUsername = '{0}'", Session["UserName"]);

Answer 2

I figured it out...I had to set the value as a Session Parameter in the actual page not in the server-side code as follows:

  <asp:SessionParameter
            Name="UserName"
            SessionField="UserName"
            Type="String" />

Next, I used @UserName inside the page server tag code and it worked fine.