In this post we have created a sample windows form application to show nested row using ObjectListView library.

Here’s a full Code:

private List cartData = null;

public FrmListView()
{
    InitializeComponent();
    InitialiseCart();
}

private void FrmListView_Load(object sender, EventArgs e)
{
    BindItem();
}

private void InitialiseCart()
{
    try
    {
        var ColId = new BrightIdeasSoftware.OLVColumn("ID", "ID");
        ColId.AspectGetter = x => (x as vmItems).ItemId;
        ColId.Width = 0;

        var ColQty = new BrightIdeasSoftware.OLVColumn("QTY", "QTY");
        ColQty.AspectGetter = x => (x as vmItems).ItemQty;
        ColQty.Width = 50;
        ColQty.TextAlign = HorizontalAlignment.Left;

        var ColName = new BrightIdeasSoftware.OLVColumn("ITEM", "ITEM");
        ColName.AspectGetter = x => (x as vmItems).ItemName;
        ColName.Width = 150;

        var ColTotal = new BrightIdeasSoftware.OLVColumn("PRICE", "PRICE");
        ColTotal.AspectGetter = x => (x as vmItems).ItemTotal;
        ColTotal.TextAlign = HorizontalAlignment.Center;

        this.treeListView1.Columns.Add(ColQty);
        this.treeListView1.Columns.Add(ColName);
        this.treeListView1.Columns.Add(ColTotal);
    }
    catch (Exception)
    {
        throw;
    }
}

public void BindItem()
{
    try
    {
        if (CartData.GetData().Count() > 0)
        {
            this.treeListView1.Roots = null;
            this.treeListView1.Roots = CartData.GetData();
            this.treeListView1.CanExpandGetter = x => (x as vmItems).vmChildItems.Count > 0;
            this.treeListView1.ChildrenGetter = x => (x as vmItems).vmChildItems;
            this.treeListView1.ExpandAll();
            this.treeListView1.TreeColumnRenderer.IsShowLines = false;
            this.treeListView1.TreeColumnRenderer.IsShowGlyphs = false;
            this.treeListView1.Refresh();
            //this.treeListView1.AutoResizeColumns(ColumnHeaderAutoResizeStyle.ColumnContent);
            //this.treeListView1.AutoResizeColumns(ColumnHeaderAutoResizeStyle.HeaderSize);
            //this.treeListView1.UseAlternatingBackColors = true;
            //this.treeListView1.AlternateRowBackColor = Color.FromArgb(224, 224, 224);
        }
        else
        {
            this.treeListView1.Roots = null;
            //this.treeListView1.Rows.Clear();
            //this.treeListView1.Columns.Clear();
        }
    }
    catch (Exception)
    {
        throw;
    }
}

private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
    try
    {
        if (this.treeListView1.Roots != null)
        {
            if (checkBox1.Checked)
            {
                this.treeListView1.ExpandAll();
            }
            else
            {
                this.treeListView1.CollapseAll();
            }
        }
    }
    catch (Exception)
    {
        throw;
    }
}

private void treeListView1_FormatRow(object sender, BrightIdeasSoftware.FormatRowEventArgs e)
{
    try
    {
        if (e.RowIndex == 0)
        {
            e.Item.ForeColor = Color.Red;
        }

        dynamic item = e.Model; bool isChild = item.IsChild;
        if (isChild)
        {
            e.Item.Font = new System.Drawing.Font("Courier New", 8F, System.Drawing.FontStyle.Italic, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
        }
    }
    catch (Exception)
    {
        throw;
    }
}

private void treeListView1_SelectionChanged(object sender, EventArgs e)
{
    try
    {
        var x = treeListView1.SelectedObjects[0];
        var nameOfProperty = "ItemId";
        var propertyInfo = x.GetType().GetProperty(nameOfProperty);
        var ItemId = propertyInfo.GetValue(x, null);

        var nameOfPropertyhp = "IsChild";
        var propertyInfohp = x.GetType().GetProperty(nameOfPropertyhp);
        var IsChild = propertyInfohp.GetValue(x, null);

        string itemId = Convert.ToString(ItemId);
        bool isChild = Convert.ToBoolean(IsChild);
        MessageBox.Show("ItemId Selected: " + itemId);
    }
    catch (Exception)
    {
        throw;
    }
}

Source Code: I’ve uploaded the full source code to download/clone , Hope this will help 🙂

References:

• http://objectlistview.sourceforge.net/cs/index.html
• https://stackoverflow.com/questions/9802724/how-to-create-a-multicolumn-treeview-like-this-in-c-sharp-winforms-app