Solved

missing a using directive or an assembly reference

Posted on 2006-06-23
16
1,829 Views
Last Modified: 2008-01-09
I'm a newbie to .net and C#...just starting to learn my way around.

I'm trying to create a simple user control with a custom unordered list.

namespace compass.user_controls
{
      using System;
      using System.Data;
      using System.Drawing;
      using System.Web;
      using System.Web.UI.WebControls;
      using System.Web.UI.HtmlControls;

      /// <summary>
      ///            Summary description for TopNavBar.
      /// </summary>
      public class TopNavBar : System.Web.UI.UserControl
      {
            protected System.Web.UI.WebControls.ListBox ListBox1;

            private void Page_Load(object sender, System.EventArgs e)
            {
                  // Put user code to initialize the page here
                  BulletedList MyList = new BulletedList();
                  //MyList.BulletStyle = BulletStyle.Numbered;
                  ListItem MyItem = new ListItem();
                  MyItem.Text = "About Us";"Contact Us";"Customer Support";"Site Map";
                  MyList.Items.Add(MyItem);
                  form1.Controls.Add(MyList);
            }

What is the directive I need to add?

Thanks.
0
Comment
Question by:-Dman100-
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
16 Comments
 
LVL 12

Expert Comment

by:gbzhhu
ID: 16970667
Are you referencing System.web and system.data.  Check your project explorer, expand the references, see if they are in there.  If they are not add the refrences
0
 
LVL 25

Expert Comment

by:dstanley9
ID: 16970694
Which line is the compiler error on?
0
 

Author Comment

by:-Dman100-
ID: 16971009
both system.web and system.data are refereced.

here are the lines the errors are thrown:

BulletedList MyList = new BulletedList();

MyList.Items.Add(MyItem);
0
Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

 
LVL 52

Expert Comment

by:Carl Tawn
ID: 16971100
Are you using .Net 1.1 or 2.0 ?
0
 

Author Comment

by:-Dman100-
ID: 16971115
.Net 1.1 Framework
0
 
LVL 52

Expert Comment

by:Carl Tawn
ID: 16971226
Then thats your problem, the BulletedList control was introduced in 2.0.
0
 
LVL 52

Expert Comment

by:Carl Tawn
ID: 16971235
There are some suggested workarounds for creating a BulletedList with 1.1 here:

    http://aspalliance.com/247
0
 

Author Comment

by:-Dman100-
ID: 16971483
Is an arraylist available in .Net 1.1?

Based on one of the workaround solutions I could bind an arraylist

<ul>
<asp:Repeater ID="TopMenu" Runat="server">
<ItemTemplate>
<li>
<%# DataBinder.Eval(Container.DataItem, "MenuItems") %>
</li>
</ItemTemplate>
</asp:Repeater>
</ul>

ArrayList MenuItems = New ArrayList()

I'm still getting errors and not making much headway with this.
0
 
LVL 52

Expert Comment

by:Carl Tawn
ID: 16971553
Yup, ArrayList is under the System.Collections namespace.
0
 

Author Comment

by:-Dman100-
ID: 16971625
is there a good article or tutorial on creating an arraylist using C#?

I've added the System.Collections namespace

But, I'm still having trouble creating the arraylist, which is just a symptom of not know what I'm doing.

Thanks for your help.
0
 

Author Comment

by:-Dman100-
ID: 16971743
well, I made some headway:

namespace compass.user_controls
{
      using System;
      using System.Collections;
      using System.Data;
      using System.Drawing;
      using System.Web;
      using System.Web.UI.WebControls;
      using System.Web.UI.HtmlControls;

      /// <summary>
      ///            Summary description for TopNavBar.
      /// </summary>
      public class TopNavBar : System.Web.UI.UserControl
      {
            public ArrayList MenuItems = new ArrayList();

      private void Page_Load(object sender, System.EventArgs e)
            {
                  // Put user code to initialize the page here
                  
                  ArrayList MenuItems = new ArrayList();
                  MenuItems.Add("About Us");
                  MenuItems.Add("Contact Us");
                  MenuItems.Add("Customer Support");
                  MenuItems.Add("Site Map");
            }

I'm not getting any errors, but where am I going wrong on binding my arraylist?

<ul>
<asp:Repeater ID="TopMenu" Runat="server">
<ItemTemplate>
<li>
<%# DataBinder.Eval(Container.DataItem, "MenuItems") %>
</li>
</ItemTemplate>
</asp:Repeater>
</ul>
0
 
LVL 52

Expert Comment

by:Carl Tawn
ID: 16971752
What exactly are you having trouble with ?

ArrayList is fairly simple:

    public void Wibble()
    {
        ArrayList arr = new ArrayList();
        arr.Add("Value 1");
        arr.Add("Value 2");
    }
0
 

Author Comment

by:-Dman100-
ID: 16971861
I almost have it working.  This is what I've got:

repeater control:

<ul>
<asp:Repeater ID="TopMenu" Runat="server">
<ItemTemplate>
<li>
<%# DataBinder.Eval(Container.DataItem, "MenuItems") %>
</li>
</ItemTemplate>
</asp:Repeater>
</ul>

code-behind:

namespace compass.user_controls
{
using System;
using System.Collections;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

/// <summary>
///            Summary description for TopNavBar.
/// </summary>
public class TopNavBar : System.Web.UI.UserControl
{
protected System.Web.UI.WebControls.Repeater TopMenu;
public ArrayList MenuItems = new ArrayList();

private void Page_Load(object sender, System.EventArgs e)
{
// Put user code to initialize the page here
                  
ArrayList MenuItems = new ArrayList();
MenuItems.Add("About Us");
MenuItems.Add("Contact Us");
MenuItems.Add("Customer Support");
MenuItems.Add("Site Map");
                  
TopMenu.DataSource = MenuItems;
TopMenu.DataBind();
}

compiler error message:

DataBinder.Eval: 'System String' does not contain a property with the name MenuItems
0
 

Author Comment

by:-Dman100-
ID: 16972747
do I need to provide more information or is my question presented incorrectly?
0
 
LVL 52

Accepted Solution

by:
Carl Tawn earned 500 total points
ID: 16972824
Binding usually has to be done to a property rather than just a public member. You'll also need to change the name of your ArrayList in order to avoid a name clash:

So change:

    public ArrayList MenuItems = new ArrayList();

To:

    private ArrayList _MenuItems = new ArrayList();

And add:

    public ArrayList MenuItems
    {
         get { return _MenuItems; }
         
         // only add this next line if the compiler complains
         set { _MenuItems = value; }
    }

You'll also need to change any other reference to MenuItems in your code to _MenuItems.
0
 

Author Comment

by:-Dman100-
ID: 16972869
thank you carl

what would be the better approach to bind the arraylist to my repeater control?
0

Featured Post

Enroll in June's Course of the Month

June's Course of the Month is now available! Every 10 seconds, a consumer gets hit with ransomware. Refresh your knowledge of ransomware best practices by enrolling in this month's complimentary course for Premium Members, Team Accounts, and Qualified Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction Although it is an old technology, serial ports are still being used by many hardware manufacturers. If you develop applications in C#, Microsoft .NET framework has SerialPort class to communicate with the serial ports.  I needed to…
We all know that functional code is the leg that any good program stands on when it comes right down to it, however, if your program lacks a good user interface your product may not have the appeal needed to keep your customers happy. This issue can…
Michael from AdRem Software outlines event notifications and Automatic Corrective Actions in network monitoring. Automatic Corrective Actions are scripts, which can automatically run upon discovery of a certain undesirable condition in your network.…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…

691 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question