Passing 2 Parameters from Datalist Control?

I have master/detail pages and pass a parameter from master page (datalist control) to detail page using session method.

Session.Add(

"prm_type", DataList1.SelectedValue);
Response.Redirect("detail.aspx");

The code, I had placed in the datalist "selectedindexchanged" method, above works well. In addition to this, I placed a textbox control in the datalist control to pass a second parameter to detail page. But i don't know how to reach that textbox value and pass the parameter to detail page within datalist selectedindexchanged method like above. I tried something like below, but i couldn't figure out.

Session.Add("prm_quantity", ? this must be my textbox control value);

How can i pass a second parameter like this?

Try with this:

TextBox tbText = (TextBox)DataList1.FindControl("TextBox1");
Session.Add("prm_quantity", tbText.Text);

I got an error message on this line:

Session.Add(

"prm_quantity", tbText.Text);

"NullReferenceException was unhandled by user code"
"Object reference not set to an instance of an object"

Hi,

It may be cache issue. Please look at this KB:

http://www.kbalertz.com/Feedback_831382.aspx

Good luck!

Passing a Value to a User Control

I have a user control named uc.ascx and an ASP.NET page named detail.aspx. Both of which are using codebehind, if it makes a difference.

In the aspx page I have the Register directive:

<%@dotnet.itags.org. Register TagPrefix="Employees" TagName="uc" src="http://pics.10026.com/?src=uc.ascx" %>

and

<Employees:uc id="uc" Runat="server" />

In the user control, I have a dropdownlist named "MySelect", and in the codebehind, a string variable named "MySelectValue".

In the aspx page, I have a value that will determine the selected value of MySelect.

Here are some code snippets:

detail.aspx.cs:

private void Page_Load(object sender, System.EventArgs e) {
uc.MySelectValue = "SomeValue";
}

uc.ascx.cs:

public class uc : System.Web.UI.UserControl {
public System.Web.UI.WebControls.DropDownList MySelect;
public string MySelectValue {
get {return MySelect.SelectedValue;}
set {MySelect.SelectedValue = MySelectValue;}
}
}

When I build the solution, I receive a CS0120 error ("An object reference is required for the nonstatic field, method or property 'xxx.Employees.uc.MySelectValue'") on the 'uc.MySelectValue = "SomeValue";' line in detail.aspx.cs.

I've tried everything I can think of, and I am at a total loss. I just can't figure this one out.
Thanks for your help.Are you using the ID as the same name of the user control class name?
I am. Would that confuse the compiler?
it could, I guess :-P, unless you use fully qualified name when declaring & instanciating classes of that type. I would rather don't use the same name however
Thanks, but I'm still getting the same error after renaming the ID.
For anyone having the same issue, a user on the WROX forum, Imar, provided the solution. I neglected to add a declaration for the control in my aspx page.

protected Your.Name.Space.YourControl uc;

However, I still received the same error until I set the ID of the control *back* to "uc".