[Solved] RadGrid DetailsTable , can not rebind

[Falcon Teng]

Hi,
  I hava create a RadGrid to Bind something using DetailsTable , set the AutoGenerateColumns as true .
 It display well at first time , but when I Rebind the datasource(the columns is not as same as the first) , The Columns of DetailsTable don't change  .

The Code like below :

1.aspx:
    

    <div>
        <asp:DropDownList ID="DropDownList1" runat="server" onselectedindexchanged="DropDownList1_SelectedIndexChanged" AutoPostBack="true">
        <asp:ListItem Value="1" Text="MoreParams"></asp:ListItem>
        <asp:ListItem Value="0" Text="LessParams" ></asp:ListItem>
        </asp:DropDownList>
        <rad:RadGrid ID="rgBug"  runat="server" AutoGenerateColumns="true" ondetailtabledatabind="rgBug_DetailTableDataBind" onneeddatasource="rgBug_NeedDataSource" >
           <ClientSettings AllowExpandCollapse="true"></ClientSettings>
            <MasterTableView  HierarchyDefaultExpanded="true" HierarchyLoadMode="Client">
                <DetailTables>
                <rad:GridTableView  runat="server"></rad:GridTableView>
                </DetailTables>
            </MasterTableView>
        </rad:RadGrid>
    </div>

2.cs:
    

   protected DataTable LessDataTable()
        {
            DataTable dt = new DataTable();
            DataColumn dc = new DataColumn();
            dc.Caption = "ID";
            dc.ColumnName = "ID";
            DataColumn dc2 = new DataColumn();
            dc2.Caption = "Name";
            dc2.ColumnName = "Name";
            dt.Columns.Add(dc);
            dt.Columns.Add(dc2);

            DataRow row = dt.NewRow();
            row[0] = 1;
            row[1] = "Bruce Lee";

            dt.Rows.Add(row);
            return dt;
        }

        protected DataTable MoreDataTable()
        {
            DataTable dt = new DataTable();
            DataColumn dc = new DataColumn();
            dc.Caption = "ID";
            dc.ColumnName = "ID";
            DataColumn dc2 = new DataColumn();
            dc2.Caption = "Name";
            dc2.ColumnName = "Name";
            DataColumn dc3= new DataColumn();
            dc3.Caption = "Age";
            dc3.ColumnName = "Age";
            dt.Columns.Add(dc);
            dt.Columns.Add(dc2);
            dt.Columns.Add(dc3);

            DataRow row = dt.NewRow();
            row[0] = 1;
            row[1] = "Hyden Panetieer";
            row[2] = 23;

            dt.Rows.Add(row);
            return dt;
        }

        protected void rgBug_NeedDataSource(object source, Telerik.WebControls.GridNeedDataSourceEventArgs e)
        {
            if (DropDownList1.SelectedIndex != 0)
                rgBug.DataSource = LessDataTable();
            else
                rgBug.DataSource = MoreDataTable();
        }

        protected void rgBug_DetailTableDataBind(object source, Telerik.WebControls.GridDetailTableDataBindEventArgs e)
        {
            if (DropDownList1.SelectedIndex != 0)
                 e.DetailTableView.DataSource = LessDataTable();
            else
                 e.DetailTableView.DataSource = MoreDataTable();
        }

        protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            rgBug.Rebind();
        }

========

The code is easy , but it cant do best for me
 

[Schlurk]

I haven't done much with the DetailTable, but have you tried to do this?

        protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            e.DetailTableView.Rebind();
        }

[Falcon Teng]

e.DetailTableView.Rebind();

this method is not exist in the DropdownList event
and I can not run it in DetailTableDataBind event,this will occur error

[Santiago Botero]

Hi, you can try this code (adapted to you) :

protected bool toLoadSettingsDetailTable=false;

protected void RadGridTrip_DetailTableDataBind(object source, GridDetailTableDataBindEventArgs e)
    {
            GridDataItem parentItem = e.DetailTableView.ParentItem as GridDataItem;

            toLoadSettingsDetailTable = true;
            e.DetailTableView.DataSource = CreateDataDetailSource(parentItem["RT_ID"].Text);

            e.DetailTableView.DataMember = "Detail";
        }

    }

protected void Page_LoadComplete(object sender, EventArgs e)
    {
            if (toLoadSettingsDetailTable)
            {
                for (var i = 0; i < RadGridTrip.MasterTableView.Items.Count;i++ )
                {
                    if (RadGrid.MasterTableView.Items[i].Expanded)
                    {
                        RadGridTrip.MasterTableView.Items[i].Expanded = false;
                        RadGridTrip.MasterTableView.Items[i].Expanded = true;
                    }
                }
            }
            toLoadSettingsDetailTable = false;

    }

ExpandCollapse will fire a Rebind() implicit.

[Dheeraj]

Though this thread is very old but I am also facing the same problem. Can any one provide solution to this problem ?? It is urgent for me...