GridView Hierarchy View Duplicate Child Row Issue

[Randy]

I am creating a hierarchy grid using object relational data.  I am adding a GridViewRelation manually to link the two classes together.  The data loads correctly at first, but then selecting a child row will cause all child rows in that position to be duplicated and selected.

After initial data load, everything looks great.

(See dataload.png)

Select Child 2_1 and all first position children are selected.

(see select1.png)

Select Child 3_2 and now all second position children are selected, and the first position children are now duplicates of each other and read Child 4_1.

(see select2.png)


Here is the code:

namespace TestGrid
{
    public partial class Form1 : Form
    {
        private BindingList<MasterObject> data;

        public Form1()
        {
            InitializeComponent();
            SetupGrid();
        }

        private void SetupGrid()
        {
            LoadMasterTemplate(grid.MasterTemplate);
            GridViewTemplate childTemplate = new GridViewTemplate();
            LoadChildTemplate(childTemplate);
            grid.MasterTemplate.Templates.Add(childTemplate);

            GridViewRelation relation = new GridViewRelation(grid.MasterTemplate, childTemplate);
            relation.RelationName = "Children";
            relation.ChildColumnNames.Add("Children");
            grid.Relations.Add(relation);
        }

        private void LoadMasterTemplate(GridViewTemplate template)
        {
            template.Columns.Clear();
            template.EnableFiltering = false;
            template.AllowAddNewRow = false;
            template.ShowChildViewCaptions = false;
            template.AutoGenerateColumns = false;
            template.EnableGrouping = false;

            GridViewTextBoxColumn colNode = new GridViewTextBoxColumn("NodeDesc");
            colNode.HeaderText = "Node";
            colNode.Name = "Node";
            colNode.ReadOnly = true;
            template.Columns.Add(colNode);

            GridViewTextBoxColumn colName = new GridViewTextBoxColumn("Name");
            colName.HeaderText = "Name";
            colName.Name = "Name";
            template.Columns.Add(colName);

            template.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
        }

        private void LoadChildTemplate(GridViewTemplate template)
        {
            template.Columns.Clear();
            template.EnableFiltering = false;
            template.EnableGrouping = false;
            template.AllowAddNewRow = false;
            template.AutoGenerateColumns = false;

            GridViewTextBoxColumn colNode = new GridViewTextBoxColumn("NodeDesc");
            colNode.HeaderText = "Node";
            colNode.Name = "Node";
            colNode.ReadOnly = true;
            template.Columns.Add(colNode);

            GridViewTextBoxColumn colIP = new GridViewTextBoxColumn("Name");
            colIP.Name = "Name";
            colIP.HeaderText = "Name";
            template.Columns.Add(colIP);

            template.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
        }

        private void LoadData()
        {
            data = new BindingList<MasterObject>();

            for (int i = 1; i < 5; i++)
            {
                MasterObject m = new MasterObject();
                m.Name = "Master " + i;
                for (int x = 1; x < i; x++)
                {
                    ChildObject c = new ChildObject();
                    c.Name = "Child " + i + "_" + x;
                    m.Children.Add(c);
                }
                data.Add(m);
            }

            grid.DataSource = data;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // Load Data In Grid
            LoadData();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            // Add Child to 1
            MasterObject m = data[0];
            ChildObject c = new ChildObject();
            c.Name = "Child " + "1_" + (m.Children.Count + 1);
            m.Children.Add(c);
        }

        private void button3_Click(object sender, EventArgs e)
        {
            // Add Child to 2
            MasterObject m = data[1];
            ChildObject c = new ChildObject();
            c.Name = "Child " + "2_" + (m.Children.Count + 1);
            m.Children.Add(c);
        }
    }

    public class MasterObject
    {
        private string name;
        public string Name
        {
            get
            {
                return name;
            }
            set
            {
                if (name != value)
                {
                    name = value;
                }
            }
        }

        public string NodeDesc
        {
            get
            {
                return "MasterObject";
            }
        }

        private BindingList<ChildObject> children;
        public BindingList<ChildObject> Children
        {
            get
            {
                return children;
            }
            set
            {
                children = value;
            }
        }

        public MasterObject()
        {
            children = new BindingList<ChildObject>();
        }
    }

    public class ChildObject
    {
        private string name;
        public string Name
        {
            get
            {
                return name;
            }
            set
            {
                if (name != value)
                {
                    name = value;
                }
            }
        }

        public string NodeDesc
        {
            get
            {
                return "ChildObject";
            }
        }

        public ChildObject() { }
    }
}

[Svett]

Hi Randy,

Thank you for writing.

We are aware for this issue. We have already addressed it for the upcoming service pack, which will be available by the end of the month. I am not able to provide you with work around due to internal implementation of RadGridView object-relational hierarchy. You can track the status of the issue here.

I hope that you find this information useful and that this time frame suits you.

Greetings,
Svett
the Telerik team