Nested Repeaters in C#

Question

Hi I have to display hierarchical information (which has four levels) within a repeater. For this I decided to use the nested repeater control. I found this article on MSDN

Answer 1

Building on the first answer, instead of building your table in the ItemDataBound function, you can pass in your table data on Page_Load, set it to a ViewState variable, then retrieve it when binding:

private DataTable GetCachedDataTable(string strTable)
{
    DataTable dtableCached = (DataTable)this.ViewState[strTableCache];
    return dtableCached;
}
protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        this.ViewState["TblTwo_Cache"] = null;
        DataTable tblOne = new DataTable();
        DataTable tblTwo = new DataTable();
        myFunctionReturningTwoTables(ref tblOne, ref tblTwo);

        // Bind the first one
        if (tblOne != null)
        {
            // This first line assumes an  
            // tag is added in front of the Repeater1 tag in the ASPX markup, above,
            // and an  tag is after the last  tag
            Repeater rptr = pnlMain.FindControl("Repeater1") as Repeater;
            rptr.ItemDataBound += new RepeaterItemEventHandler(rptrItemDataBound);
            rptr.DataSource = tblOne;
            rptr.DataBind();
        }
        // Cache the 2nd (and others...) like this
        if (tblTwo != null)
        {
            this.ViewState["TblTwo_Cache"] = tblTwo;
        }
    }
}
protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
        Repeater rptr2 = e.Item.FindControl("Repeater2") as Repeater;
        if (rptr2 != null)
        {
            DataTable dt = new DataTable();
            // Now, pull it out of cache
            dt = GetCachedDataTable("TblTwo_Cache");
            if (dt != null)
            {
                rptr2.DataSource = dt;
                rptr2.DataBind();
            }
        }
    }
}