[Solved] Grid Hierarchy with unknown -unlimited- hierarchy levels

[ahmed]

I'm making  a grid that displays file system directories and files as a hierarchy
The problem is it only works fine for only the first level of hierarchy, what I should do to make this supports unlimited levels.

here is my code:
ASPX:

<div>
        <telerik:RadGrid ID="RadGrid1" runat="server" AllowMultiRowEdit="True"
            AutoGenerateHierarchy="True" CellSpacing="0" GridLines="None"
            Skin="Windows7" ondetailtabledatabind="RadGrid1_DetailTableDataBind">
            <MasterTableView  DataKeyNames="FullName,IsDirectory,ParentDirectory">
                <DetailTables>
                    <telerik:GridTableView  AutoGenerateColumns="true" DataKeyNames="FullName,IsDirectory,ParentDirectory">
                    </telerik:GridTableView>
                </DetailTables>
            </MasterTableView>
        </telerik:RadGrid>
    </div>

Code File:

public partial class Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            List<FileWrapper> dirs  = new DirectoryInfo("C://").GetDirectories().Select(obj => new FileWrapper(obj, true)).ToList();
            List<FileWrapper> files = new DirectoryInfo("C://").GetFiles().Select(obj => new FileWrapper(obj, true)).ToList();
            dirs.AddRange(files);
            RadGrid1.DataSource = dirs;
            RadGrid1.DataBind();
        }

    }

    protected void RadGrid1_DetailTableDataBind(object sender, GridDetailTableDataBindEventArgs e)
    {

        GridDataItem dataItem = (GridDataItem)e.DetailTableView.ParentItem;

        bool isDirectory = bool.Parse(dataItem.GetDataKeyValue("IsDirectory").ToString());
        string FullName = dataItem.GetDataKeyValue("FullName").ToString();

        if (isDirectory)
        {
            DirectoryInfo d = new DirectoryInfo(FullName);
            List<FileWrapper> dirs = d.GetDirectories().Select(obj => new FileWrapper(obj, false)).ToList();
            List<FileWrapper> files = d.GetFiles().Select(obj => new FileWrapper(obj, false)).ToList();
            dirs.AddRange(files);
            e.DetailTableView.DataSource = dirs;
        }
    }




}



public class FileWrapper
{
    public string Name { get; set; }
    public string FullName { get; set; }
    public bool IsDirectory { get; set; }
    public DateTime CreationTime { get; set; }
    public string ParentDirectory { get; set; }
    public List<FileWrapper> Children { get; set; }

    public FileWrapper(object o, bool isRoot)
    {

        if (o is FileInfo)
        {
            FileInfo f = (FileInfo)o;
            Name = f.Name;
            FullName = f.FullName;
            CreationTime = f.CreationTime;
            IsDirectory = false;
            if (!isRoot)
            {
                ParentDirectory = f.Directory.FullName;
            }

        }

        if (o is DirectoryInfo)
        {
            DirectoryInfo d = (DirectoryInfo)o;
            Name = d.Name;
            FullName = d.FullName;
            CreationTime = d.CreationTime;
            IsDirectory = true;
            if (!isRoot)
            {
                ParentDirectory = d.Parent.FullName;
            }

        }
    }
}

[Princy]

Hello Ahmed,

You can try the same approach in the following demo for achieving this.
Grid / Programmatic Binding.

Thanks,
Princy.

[Maurizio]

How can we set the grid to have unlimited sub-grid if the only way (the only way I know) is to write the DetailTable in the HTML markup?
Do we have to set it during runtime? Is there a sample that accomplish this scenario?
Thank you

[Pavlina]

Hi Maurizio,

In order to display hierarchical data, Telerik's ASP.NET Grid component renders one or more detail tables for each item in the MasterTableView (i.e. for each data-row that MasterTableView renders). How to bind each detail table-view declaratively or programmatically through DetailTableDataBind event is demonstrated in the examples below:
http://demos.telerik.com/aspnet-ajax/grid/examples/hierarchy/declarative-relations/defaultcs.aspx
http://demos.telerik.com/aspnet-ajax/grid/examples/data-binding/programmatic-hierarchy/defaultcs.aspx

Regards,

Pavlina
Telerik