how can i show multiple indenepdent template in top level of telerik radgridview

 hello:
  i want add multiple template to radgridview and show templates in tabbed style ,
my templates is independent and no relation to each other, 
when i add templates to masterTemplate and set datasource of my templates,
datagrid is show empty grid and templates is not visible.
some tried code :  
Add Template Section:

                            GridViewTemplate gvt = new GridViewTemplate();
                        gvt.AllowDeleteRow = false;
                        gvt.AllowEditRow = false;
                        gvt.ShowTotals = true;
                        gvt.Caption = SubCaption[i];
                        radResult.MasterTemplate.Templates.Add(gvt);
                        radResult.Refresh();

Set Data Source Section that Indexnumber is template index:

            radResult.MasterTemplate.Templates[IndexNumber].DataSource = dtl;
            radResult.MasterTemplate.Templates[IndexNumber].Refresh();
            radResult.Refresh();

my desired View is : RadGridView target view

how must i do that?
thanks advance

Solution

RadGridView offers only one master level via the MasterGridViewTemplate. You can add as many child GridViewTemplates to the master level as you need. More information is available here: https://docs.telerik.com/devtools/winforms/controls/gridview/hierarchical-grid/hierarchy-of-one-to-many-relations

However, this requires a relation between the MasterTemplate and each of the child GridViewTemplates.

In order to achieve your design from the screenshot for a tabbed view in RadGridView on the parent level, I can suggest the following approaches:

Use a single RadGridView instance and set up a hierarchy with load on demand. For this purpose, it would be necessary to add a dummy row for the master level and keep it expanded. The following code snippet shows how to achieve it:

     private void RadForm1_Load(object sender, EventArgs e)
 {
     // TODO: This line of code loads data into the 'nwindDataSet.Products' table. You can move, or remove it, as needed.
     this.productsTableAdapter.Fill(this.nwindDataSet.Products);
     // TODO: This line of code loads data into the 'nwindDataSet.Orders' table. You can move, or remove it, as needed.
     this.ordersTableAdapter.Fill(this.nwindDataSet.Orders);
     // TODO: This line of code loads data into the 'nwindDataSet.Categories' table. You can move, or remove it, as needed.
     this.categoriesTableAdapter.Fill(this.nwindDataSet.Categories);

     this.radGridView1.MasterTemplate.Columns.Add("MasterLevel");
     this.radGridView1.MasterTemplate.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;

     this.radGridView1.MasterTemplate.AllowAddNewRow = false;
     this.radGridView1.ShowColumnHeaders = false;
     this.radGridView1.ShowGroupPanel = false;

     GridViewTemplate childTemplateCategories = new GridViewTemplate();
     childTemplateCategories.Caption = "Categories";
     foreach (DataColumn col in this.nwindDataSet.Categories.Columns)
     {
         childTemplateCategories.Columns.Add(col.ColumnName);
     }
     childTemplateCategories.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
     this.radGridView1.Templates.Add(childTemplateCategories);
     childTemplateCategories.HierarchyDataProvider = new GridViewEventDataProvider(childTemplateCategories);

     GridViewTemplate childTemplateProducts = new GridViewTemplate();
     childTemplateProducts.Caption = "Products";
     foreach (DataColumn col in this.nwindDataSet.Products.Columns)
     {
         childTemplateProducts.Columns.Add(col.ColumnName);
     }
     childTemplateProducts.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
     this.radGridView1.Templates.Add(childTemplateProducts);
     childTemplateProducts.HierarchyDataProvider = new GridViewEventDataProvider(childTemplateProducts);

     GridViewTemplate childTemplateOrders = new GridViewTemplate();
     childTemplateOrders.Caption = "Orders";
     foreach (DataColumn col in this.nwindDataSet.Orders.Columns)
     {
         childTemplateOrders.Columns.Add(col.ColumnName);
     }
     childTemplateOrders.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
     this.radGridView1.Templates.Add(childTemplateOrders);
     childTemplateOrders.HierarchyDataProvider = new GridViewEventDataProvider(childTemplateOrders);

     this.radGridView1.RowSourceNeeded += new GridViewRowSourceNeededEventHandler(radGridView1_RowSourceNeeded);

     this.radGridView1.Rows.Add("Master");
     this.radGridView1.Rows[0].IsExpanded = true; 
 }

 private void radGridView1_RowSourceNeeded(object sender, GridViewRowSourceNeededEventArgs e)
 {
     if (e.Template.Caption == "Categories")
     {
         foreach (DataRow row in this.nwindDataSet.Categories.Rows)
         {
             GridViewRowInfo r = e.Template.Rows.NewRow();
             foreach (GridViewCellInfo cell in r.Cells)
             {
                 cell.Value = row[cell.ColumnInfo.Name];
             }
             e.SourceCollection.Add(r);
         }
     }
     else if (e.Template.Caption == "Products")
     {
         foreach (DataRow row in this.nwindDataSet.Products.Rows)
         {
             GridViewRowInfo r = e.Template.Rows.NewRow();
             foreach (GridViewCellInfo cell in r.Cells)
             {
                 cell.Value = row[cell.ColumnInfo.Name];
             }
             e.SourceCollection.Add(r);
         }
     }
     else if (e.Template.Caption == "Orders")
     {
         foreach (DataRow row in this.nwindDataSet.Orders.Rows)
         {
             GridViewRowInfo r = e.Template.Rows.NewRow();
             foreach (GridViewCellInfo cell in r.Cells)
             {
                 cell.Value = row[cell.ColumnInfo.Name];
             }
             e.SourceCollection.Add(r);
         }
     }
 }

Use a RadDock or a RadPageView and add as many tabbed documents/pages as you need. Then, on each tab/page add a separate RadGridView control and populate it with the relevant data.

Feel free to use this approach which suits your requirements best.