Edit autogenerate columns in telerik UI

edit autogenerate columns using radgrid from code behind

i am tring to inline edit multiple rows in autogenerated columns from radgrid below is column created and itemcreated methods i wrote for that

here i created manual templates as you can check in code below
the edit i try to to get is the below one but i am getting the auto edit grid which comes from griddataitem
and the code for that is
item.edit== true // due to this i get the edit but i dont want that
i wanted inline edit for that i replaced template with the template which i have written here

also when i debug
index in ReplaceWithTemplateColumn comes -1 because column is not collecting index

**columncreated and itemcreated **

if (!(e.Column is GridBoundColumn boundCol)) return; string field = boundCol.DataField; //autocomplete if (field == "Org" || field == "Dest" || field == "VIA_Station") { ReplaceWithTemplateColumn( e, boundCol, new DisplayTextTemplate(field), new AutoCompleteEditTemplate(field) ); } else if (field == "Level") { ReplaceWithTemplateColumn( e, boundCol, new DisplayTextTemplate(field), new DropDownEditTemplate(field, CacheTable.SRA_Level) ); } else if (field == "Carrier") { ReplaceWithTemplateColumn( e, boundCol, new DisplayTextTemplate(field), new DropDownEditTemplate(field, CacheTable.Carrier) ); } else if (field == "Product") { ReplaceWithTemplateColumn( e, boundCol, new DisplayTextTemplate(field), new DropDownEditTemplate(field, CacheTable.Product) ); } else if (field == "Rate_UOM") { ReplaceWithTemplateColumn( e, boundCol, new DisplayTextTemplate(field), new DropDownEditTemplate(field, CacheTable.RateUOM) ); } else if (field == "Currency") { ReplaceWithTemplateColumn( e, boundCol, new DisplayTextTemplate(field), new DropDownEditTemplate(field, CacheTable.Currency) ); } else if (field == "Commodity") { ReplaceWithTemplateColumn( e, boundCol, new DisplayTextTemplate(field), new DropDownEditTemplate(field, CacheTable.Commodity) ); } else if (field == "Effective_Dt" || field == "Expiry_Dt") { ReplaceWithTemplateColumn( e, boundCol, new DisplayTextTemplate(field), new DatePickerEditTemplate(field) ); } } catch (Exception ex) { ClientUtil.LogException(Page, ex, "myscript"); } } /*private void ReplaceWithTemplateColumn( GridColumnCreatedEventArgs e, GridBoundColumn oldCol, ITemplate itemTemplate, ITemplate editTemplate) { GridTemplateColumn tpl = new GridTemplateColumn { UniqueName = oldCol.UniqueName, DataField = oldCol.DataField, HeaderText = oldCol.HeaderText, SortExpression = oldCol.SortExpression, ItemTemplate = itemTemplate }; if (editTemplate != null) tpl.EditItemTemplate = editTemplate; tpl.HeaderStyle.Width = oldCol.HeaderStyle.Width; tpl.ItemStyle.Width = oldCol.ItemStyle.Width; e.OwnerTableView.Columns.Remove(oldCol); e.OwnerTableView.Columns.Add(tpl); }*/ private void ReplaceWithTemplateColumn( GridColumnCreatedEventArgs e, GridBoundColumn oldColumn, ITemplate itemTemplate, ITemplate editTemplate) { GridTemplateColumn newCol = new GridTemplateColumn(); // Preserve identity newCol.UniqueName = oldColumn.UniqueName; newCol.HeaderText = oldColumn.HeaderText; newCol.SortExpression = oldColumn.SortExpression; newCol.DataField = oldColumn.DataField; // Preserve layout newCol.HeaderStyle.Width = oldColumn.HeaderStyle.Width; newCol.ItemStyle.Width = oldColumn.ItemStyle.Width; newCol.ItemStyle.HorizontalAlign = oldColumn.ItemStyle.HorizontalAlign; // Templates newCol.ItemTemplate = itemTemplate; if (editTemplate != null) newCol.EditItemTemplate = editTemplate; // replace at same index // int index = Array.IndexOf(e.OwnerTableView.RenderColumns, e.Column); int index = e.OwnerTableView.Columns.IndexOf(oldColumn); if (index < 0) { return; // column is not in collection anymore } e.OwnerTableView.Columns.Remove(oldColumn); e.OwnerTableView.Columns.Insert(index, newCol); } public class DisplayTextTemplate : ITemplate { private readonly string _uniqueName; public DisplayTextTemplate(string uniqueName) { _uniqueName = uniqueName; } public void InstantiateIn(Control container) { Literal lbl = new Literal(); lbl.DataBinding += (s, e) => { Literal l = (Literal)s; GridDataItem item = (GridDataItem)l.NamingContainer; string text = item[_uniqueName].Text; l.Text = (!string.IsNullOrWhiteSpace(text) && text != "&nbsp;") ? text : string.Empty; }; container.Controls.Add(lbl); } } public class DropDownEditTemplate : ITemplate { private readonly string _columnKey; private readonly CacheTable _cacheTable; public DropDownEditTemplate(string columnKey, CacheTable cacheTable) { _columnKey = columnKey; // UniqueName _cacheTable = cacheTable; // Cache source } public void InstantiateIn(Control container) { RadComboBox rcb = new RadComboBox(); rcb.ID = "ddl_" + _columnKey; rcb.Width = Unit.Pixel(130); rcb.MarkFirstMatch = true; rcb.AllowCustomText = false; rcb.Filter = RadComboBoxFilter.Contains; rcb.EnableViewState = true; rcb.DataBinding += (sender, args) => { RadComboBox combo = (RadComboBox)sender; GridEditableItem item = (GridEditableItem)combo.NamingContainer; BindComboBox(combo, _cacheTable); //Select existing value string currentValue = item[_columnKey].Text; if (!string.IsNullOrWhiteSpace(currentValue) && currentValue != "&nbsp;") { RadComboBoxItem selected = combo.Items.FindItemByText(currentValue); if (selected != null) { selected.Selected = true; } } // save /* combo.Attributes.Add("data-Name", _columnKey); combo.Attributes.Add( "data-RowId", item.GetDataKeyValue("InterlineRate_Quarantine_ID")?.ToString() );*/ }; container.Controls.Add(rcb); } private static void BindComboBox( RadComboBox rcbComboBox, CacheTable cacheTable ) { List<MasterDataModel> list = ClientUtil.GetMasterData(cacheTable); rcbComboBox.DataSource = list; rcbComboBox.DataTextField = "DataTextField"; rcbComboBox.DataValueField = "DataValueField"; rcbComboBox.DataBind(); } } public class AutoCompleteEditTemplate : ITemplate { private readonly string _uniqueName; public AutoCompleteEditTemplate(string uniqueName) { _uniqueName = uniqueName; } public void InstantiateIn(Control container) { RadAutoCompleteBox ac = new RadAutoCompleteBox(); ac.ID = "ac_" + _uniqueName; ac.Width = Unit.Pixel(90); ac.InputType = RadAutoCompleteInputType.Text; ac.Filter = RadAutoCompleteFilter.StartsWith; ac.MinFilterLength = 1; // ac.TextSettings.SelectionMode = AutoCompleteSelectionMode.Single; // ac.AllowCustomText = true; // ac.MarkFirstMatch = true; ac.DropDownHeight = Unit.Pixel(150); ac.DropDownWidth = Unit.Pixel(75); ac.WebServiceSettings.Path = "../../AutoCompleteDataPage.aspx"; ac.WebServiceSettings.Method = GetWebMethodName(); // Bind existing cell value in edit mode ac.DataBinding += (s, e) => { RadAutoCompleteBox box = (RadAutoCompleteBox)s; GridEditableItem item = (GridEditableItem)box.NamingContainer; string value = item[_uniqueName].Text; /* if (!string.IsNullOrWhiteSpace(value) && value != "&nbsp;") { box.Entries.Clear(); box.Entries.Add( new AutoCompleteBoxEntry(value, value) ); } */ //save later /*box.Attributes.Add("data-Name", _uniqueName); box.Attributes.Add( "data-RowId", item.GetDataKeyValue("InterlineRate_Quarantine_ID")?.ToString() );*/ }; container.Controls.Add(ac); } // MAP COLUMN → WEBMETHOD private string GetWebMethodName() { switch (_uniqueName) { case "VIA_Station": return "GetAirportData"; case "Org": return "GetOrgCountryDataView"; case "Dest": return "GetDestCountryDataView"; default: throw new InvalidOperationException( "No WebMethod mapped for " + _uniqueName); } } } public class DatePickerEditTemplate : ITemplate { private readonly string _uniqueName; public DatePickerEditTemplate(string uniqueName) { _uniqueName = uniqueName; // Effective_Dt / Expiry_Dt } public void InstantiateIn(Control container) { RadDatePicker dp = new RadDatePicker(); dp.ID = "dt_" + _uniqueName; dp.Width = Unit.Pixel(110); // Date formatting dp.DateInput.DateFormat = "dd-MMM-yyyy"; dp.DateInput.DisplayDateFormat = "dd-MMM-yyyy"; // dp.DateInput.ReadOnly = true; dp.Calendar.EnableKeyboardNavigation = true; // Bind existing value when row enters edit mode dp.DataBinding += (sender, args) => { RadDatePicker picker = (RadDatePicker)sender; GridEditableItem item = (GridEditableItem)picker.NamingContainer; string text = item[_uniqueName].Text; if (!string.IsNullOrWhiteSpace(text) && text != "&nbsp;" && DateTime.TryParse(text, out DateTime date)) { picker.SelectedDate = date; } // save /*picker.Attributes.Add("data-Name", _uniqueName); picker.Attributes.Add( "data-RowId", item.GetDataKeyValue("InterlineRate_Quarantine_ID")?.ToString() );*/ }; container.Controls.Add(dp); } } protected void rgIRView_Quarantine_ItemCreated(object sender, GridItemEventArgs e) { try { if (e.Item is GridHeaderItem) { GridHeaderItem item = (GridHeaderItem)e.Item; CheckBox rtb = new CheckBox(); rtb.ID = "chk1"; rtb.CssClass = "ChkHeader"; rtb.Attributes.Add("onclick", "SelectAllCheckboxes(this);"); TableCell cell = (TableCell)item["InterlineRate_Quarantine_ID"]; cell.Controls.Add(rtb); } // ROW CHECKBOX THIS WAS MISSING if (e.Item is GridDataItem dataItem) { CheckBox chkRow = new CheckBox(); chkRow.ID = "chk2"; chkRow.CssClass = "chkRateSheet"; chkRow.EnableViewState = true; chkRow.Attributes.Add("onclick", "SelectChildCheckBoxes(this);"); dataItem["InterlineRate_Quarantine_ID"].Controls.Add(chkRow); // TableCell cell = dataItem["InterlineRate_Quarantine_ID"]; // cell.Controls.Clear(); // cell.Controls.Add(chkRow); if (!(ViewState["IsEditMode"] is bool isEdit) || !isEdit) return; if (ViewState["EditIds"] == null) return; if (ViewState["EditIds"] != null) { List<long> editIds = (List<long>)ViewState["EditIds"]; long rowId = Convert.ToInt64( dataItem.GetDataKeyValue("InterlineRate_Quarantine_ID")); if (editIds.Contains(rowId)) { dataItem.Edit = true; //THIS ENABLES INLINE EDIT } } } <div class="col-md-12 padding_none pull-left"> <telerik:RadGrid ID="rgIRView_Quarantine" ShowStatusBar="false" runat="server" AllowPaging="True" EditMode="InPlace" OnItemCreated="rgIRView_Quarantine_ItemCreated" AllowMultiRowSelection="false" AutoGenerateColumns="true" AllowCustomPaging="True" AllowSorting="True" AllowMultiRowEdit="True" Width="100%" OnPreRender="rgIRView_Quarantine_Prerender" OnColumnCreated="rgIRView_Quarantine_ColumnCreated" OnNeedDataSource="rgIRView_Quarantine_NeedDataSource" OnItemDataBound="rgIRView_Quarantine_ItemDataBound" OnPageIndexChanged="rgIRView_Quarantine_PageIndexChanged" OnPageSizeChanged="rgIRView_Quarantine_PageSizeChanged" RenderMode="Lightweight" MasterTableView-DataKeyNames ="InterlineRate_Quarantine_ID" > <ClientSettings AllowColumnHide="True" Scrolling-AllowScroll="true" AllowColumnsReorder="False" ReorderColumnsOnClient="False" EnableRowHoverStyle="true"> <Selecting AllowRowSelect="True" /> <Scrolling AllowScroll="True" UseStaticHeaders="True" SaveScrollPosition="true" /> <ClientEvents OnGridCreated="radGrid_OnGridCreated" /> </ClientSettings> <PagerStyle Mode="NextPrevNumericAndAdvanced" AlwaysVisible="true"></PagerStyle> </telerik:RadGrid>