ListView SubClass Problem

[Stuart]

Hello,

We are trying to subclass the ListView control and have a collection of a
class as the Items. Our implementation works at runtime. However at design
time if the user adds elements, we can not see them in the visual studio
designer.

Any help would be appreciated. The class is NameAndId and the collection
property VariableNamesAn dIds. We marked it with the
[DesignerSeriali zationVisibilit y(DesignerSeria lizationVisibil ity.Content)]
attribute to no avail.

Any help would be appreciated.

Stuart

using System;
using System.Collecti ons.Generic;
using System.Componen tModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows. Forms;

namespace OurCompany.Repo rtComponents
{
/// <summary>
///
/// </summary>
public partial class ResultListView : ListView, IReportComponen t
{
/// <summary>
///
/// </summary>
[Serializable]
public class NameAndId
{
private string name;
private string alias;
private int id;

/// <summary>
///
/// </summary>
public string Name
{
get
{
return name;
}
set
{
name = value;
}
}
/// <summary>
///
/// </summary>
public string Alias
{
get
{
return alias;
}
set
{
alias = value;
}
}
/// <summary>
///
/// </summary>
public int Id
{
get
{
return id;
}
set
{
id = value;
}
}
}

private List<NameAndIdm yNameAndIdList;

/// <summary>
///
/// </summary>
[Category("OurCa tegory")]
[Description("Se t name of variables and record ids")]
[DesignerSeriali zationVisibilit y(DesignerSeria lizationVisibil ity.Content)]
public List<NameAndIdV ariableNamesAnd Ids
{
get
{
return myNameAndIdList ;
}
set
{
if (!myItemsSet)
{
myNameAndIdList = value;
int count = myNameAndIdList .Count;
ListViewItem item;
for (int i = 0; i < count; ++i)
{
if (!string.IsNull OrEmpty(myNameA ndIdList[i].Alias))
{
item = new ListViewItem(my NameAndIdList[i].Alias);
}
else
{
item = new ListViewItem(my NameAndIdList[i].Name);
}
Items.Add(item) ;
}
myItemsSet = true;
}

}
}
/// <summary>
/// Default Constructor.
/// </summary>
public ResultListView( )
{
InitializeCompo nent();
myFormatString = new StringBuilder(" 0");
myNameAndIdList = new List<NameAndId> ();

Size = new Size(240, 160);

Columns[0].Width = Size.Width / 2;

// Magic number -2 makes the last column take up all remaining space
in the row.
Columns[1].Width = -2;
}
}
}

[Ashot Geodakov]

Hi,

Can you try to implement NameAndId.ToStr ing() method ans see if it changes
anything?
"Stuart" <fi********@new sgroups.nospamw rote in message
news:AB******** *************** ***********@mic rosoft.com...

Hello,

We are trying to subclass the ListView control and have a collection of a
class as the Items. Our implementation works at runtime. However at
design time if the user adds elements, we can not see them in the visual
studio designer.

Any help would be appreciated. The class is NameAndId and the collection
property VariableNamesAn dIds. We marked it with the
[DesignerSeriali zationVisibilit y(DesignerSeria lizationVisibil ity.Content)]
attribute to no avail.

Any help would be appreciated.

Stuart

using System;
using System.Collecti ons.Generic;
using System.Componen tModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows. Forms;

namespace OurCompany.Repo rtComponents
{
/// <summary>
///
/// </summary>
public partial class ResultListView : ListView, IReportComponen t
{
/// <summary>
///
/// </summary>
[Serializable]
public class NameAndId
{
private string name;
private string alias;
private int id;

/// <summary>
///
/// </summary>
public string Name
{
get
{
return name;
}
set
{
name = value;
}
}
/// <summary>
///
/// </summary>
public string Alias
{
get
{
return alias;
}
set
{
alias = value;
}
}
/// <summary>
///
/// </summary>
public int Id
{
get
{
return id;
}
set
{
id = value;
}
}
}

private List<NameAndIdm yNameAndIdList;

/// <summary>
///
/// </summary>
[Category("OurCa tegory")]
[Description("Se t name of variables and record ids")]

[DesignerSeriali zationVisibilit y(DesignerSeria lizationVisibil ity.Content)]
public List<NameAndIdV ariableNamesAnd Ids
{
get
{
return myNameAndIdList ;
}
set
{
if (!myItemsSet)
{
myNameAndIdList = value;
int count = myNameAndIdList .Count;
ListViewItem item;
for (int i = 0; i < count; ++i)
{
if (!string.IsNull OrEmpty(myNameA ndIdList[i].Alias))
{
item = new ListViewItem(my NameAndIdList[i].Alias);
}
else
{
item = new ListViewItem(my NameAndIdList[i].Name);
}
Items.Add(item) ;
}
myItemsSet = true;
}

}
}
/// <summary>
/// Default Constructor.
/// </summary>
public ResultListView( )
{
InitializeCompo nent();
myFormatString = new StringBuilder(" 0");
myNameAndIdList = new List<NameAndId> ();

Size = new Size(240, 160);

Columns[0].Width = Size.Width / 2;

// Magic number -2 makes the last column take up all remaining space
in the row.
Columns[1].Width = -2;
}
}
}