Nested Dynamic RadGrid issue

[Veenu]

Hi ,

I am making a UserControl having Nested RadGrid, Everything is made dynamically in codebehind. I am adding Edit button to ParentTable in ItemDatabound. When i expand parentrow my ParentRow Edit button binding is gone.

NeedDataSource of ParentGrid is not firing. These are my Grid Event

#region Grid Events

        protected void RadGridNestedControl_DetailTableDataBind(object source, Telerik.Web.UI.GridDetailTableDataBindEventArgs e)
        {
            GridDataItem dataItem = (GridDataItem)e.DetailTableView.ParentItem;
            string strParentRelationID = dataItem.GetDataKeyValue(this.ParentRelationColumn).ToString();
            e.DetailTableView.DataSource = Source.Tables[1].Select(ChildRelationColumn + "=" + strParentRelationID);
            RadGrid obj = (RadGrid)source ;
            //obj.Rebind();
        }

        protected void RadGridNestedControl_ItemDataBound(object source, Telerik.Web.UI.GridItemEventArgs e)
        {
            if (this.PageType == (int)PageName.HeaderFooterListing)
            {
                if (e.Item is GridDataItem && e.Item.OwnerTableView.Name == "ParentView")
                {
                    GridDataItem dataItem = e.Item as GridDataItem;
                    GridTableCell wgColEdit = (GridTableCell)dataItem["Edit"];

                    if (wgColEdit != null)
                    {
                        //Creating QueryString
                        string[] editParam = this.NavigationEditParameters;
                        string strQueryString = string.Empty;
                        foreach (string str in editParam)
                        {
                            if (dataItem[str] != null)
                            {
                                if (dataItem[str].Text != " ")
                                    strQueryString += str + "=" + dataItem[str].Text + "&";
                                else
                                    strQueryString += str + "=" + ServiceNet.BLL.Global.NullInteger.ToString() + "&";
                            }
                        }
                        strQueryString += "PKSourceClientID=" + intClientID;

                        wgColEdit.HorizontalAlign = HorizontalAlign.Center;
                        (wgColEdit.Controls[0] as ImageButton).Style.Add("Cursor", "Pointer");
                        wgColEdit.ToolTip = ResourceLang.GetString("C_Edit");
                        string url = ((ServiceNet.Web.BasePage)Page).ImagesLocation + "btn_edit_small" + ((ServiceNet.Web.BasePage)Page).ImageExtension;
                        wgColEdit.Text = "<a href='" + this.NavigationEditURL + "?" + strQueryString + "' ><img src='" + url + "'  OnMouseOver=ChangeImage(this,'btn_edit_small',1) OnMouseOut=ChangeImage(this,'btn_edit_small',2) OnMouseDown=ChangeImage(this,'btn_edit_small',3) OnMouseUp=ChangeImage(this,'btn_edit_small',4) onKeyDown=ChangeImage(this,'btn_edit_small',5)   OnKeyUp=ChangeImage(this,'btn_edit_small',6)></a>";
                    }

                }

                if (e.Item is GridDataItem && e.Item.OwnerTableView.Name == "ChildView")
                {
                    GridDataItem dataItem = e.Item as GridDataItem;
                    GridTableCell wgColPreview = (GridTableCell)dataItem["Add"];

                    if (wgColPreview != null)
                    {
                        int intPKID = Convert.ToInt32(dataItem.GetDataKeyValue(this.ChildRelationColumn).ToString());
                        int intTypeValueID = ServiceNet.BLL.Global.NullInteger;
                        int intPKUserSourceID = ServiceNet.BLL.Global.NullInteger;
                        int intPopUpHeight = ServiceNet.BLL.Global.NullInteger;
                        int intPopUpWidth = ServiceNet.BLL.Global.NullInteger;

                        string strDisplayText = dataItem["DisplayText"].Text;

                        //Getting ParentRow Data
                        DataRow[] drParent = Source.Tables[0].Select("PKID =" + intPKID);
                        if (drParent != null && drParent.Length > 0)
                        {
                            intTypeValueID = DatabaseHelper.GetNullableInt32(drParent[0], "TypeValueID");
                            intPKUserSourceID = DatabaseHelper.GetNullableInt32(drParent[0], "PKUserSourceID");
                            intPopUpHeight = DatabaseHelper.GetNullableInt32(drParent[0], "PopUpHeight");
                            intPopUpWidth = DatabaseHelper.GetNullableInt32(drParent[0], "PopUpWidth");
                        }


                        wgColPreview.HorizontalAlign = HorizontalAlign.Center;
                        wgColPreview.ToolTip = ResourceLang.GetString("C_Preview");
                        string url = ((ServiceNet.Web.BasePage)Page).ImagesLocation + "btn_ViewSchedules" + ((ServiceNet.Web.BasePage)Page).ImageExtension;
                        wgColPreview.Text = "<a href='# style=cursor:hand;'><img onclick=\"javascript:ShowDataPopUp('" + this.ControlSessionData.LoggedUserPreferences.LanguageID + "','" + intTypeValueID + "','" + strDisplayText + "','" + intPKUserSourceID + "','" + intPopUpHeight + "','" + intPopUpWidth + "');\" src='" + url + "'  OnMouseOver=ChangeImage(this,'btn_ViewSchedules',1) OnMouseOut=ChangeImage(this,'btn_ViewSchedules',2) OnMouseDown=ChangeImage(this,'btn_ViewSchedules',3) OnMouseUp=ChangeImage(this,'btn_ViewSchedules',4) onKeyDown=ChangeImage(this,'btn_ViewSchedules',5)   OnKeyUp=ChangeImage(this,'btn_ViewSchedules',6)></a>";
                    }
                }
            }
        }

        protected void RadGridNestedControl_NeedDataSource(object source, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
        {
            //if (!e.IsFromDetailTable)
            //{
            //    LoadData(this.Source);
            //}
        }

        #endregion

This is my LoadGrid Event which is fired from Page_Load()

public void LoadData(DataSet dsSource)
        {

            this.RadGridNestedControl = new RadGrid();

            this.RadGridNestedControl.ID = "RadGrid1";
            this.RadGridNestedControl.NeedDataSource += new GridNeedDataSourceEventHandler(this.RadGridNestedControl_NeedDataSource);
            this.RadGridNestedControl.DetailTableDataBind += new GridDetailTableDataBindEventHandler(this.RadGridNestedControl_DetailTableDataBind);
            this.RadGridNestedControl.ItemDataBound += new GridItemEventHandler(this.RadGridNestedControl_ItemDataBound);

            this.RadGridNestedControl.EnableEmbeddedScripts = true;

            this.RadGridNestedControl.Width = Unit.Percentage(100);
            thisthis.RadGridNestedControl.PageSize = this.ParentNumberofRecords;
            this.RadGridNestedControl.AllowPaging = true;
            this.RadGridNestedControl.AllowSorting = true;
            this.RadGridNestedControl.AutoGenerateColumns = false;

            if (this.Source != null)
            {

                RadGridNestedControl.DataSource = dsSource.Tables[0];
                RadGridNestedControl.MasterTableView.DataKeyNames = new string[] { this.ParentRelationColumn };
                RadGridNestedControl.MasterTableView.Name = "ParentView";

                //Creating Columns
                foreach (DataColumn dcol in dsSource.Tables[0].Columns)
                {
                    if (this.ParentExcludedFields != ServiceNet.BLL.Global.NullString)
                    {
                        if (this.ParentExcludedFields.IndexOf("," + dcol.ColumnName.ToUpper() + ",") < 0)
                        {
                            if (this.ResourceLangPrefix != null && this.ResourceLangPrefix != "")
                                dcol.Caption = ResourceLang.GetString(this.ResourceLangPrefix + "_" + dcol.ColumnName);
                            else
                                dcol.Caption = ResourceLang.GetString(dcol.ColumnName);
                            if (dcol.Caption == string.Empty)
                                dcoldcol.Caption = dcol.ColumnName;
                            GridBoundColumn wgCol = new GridBoundColumn();
                            RadGridNestedControl.MasterTableView.Columns.Add(wgCol);
                            wgCol.DataField = dcol.ColumnName;
                            wgCol.HeaderText = dcol.Caption;
                            wgCol.UniqueName = dcol.ColumnName;
                            wgCol.AllowSorting = true;
                        }
                        else
                        {
                            GridBoundColumn wgCol = new GridBoundColumn();
                            RadGridNestedControl.MasterTableView.Columns.Add(wgCol);
                            wgCol.DataField = dcol.ColumnName;
                            wgCol.Display = false;
                        }
                    }
                    else
                    {
                        dcol.Caption = ResourceLang.GetString(this.ResourceLangPrefix + "_" + dcol.ColumnName);
                        if (dcol.Caption == string.Empty)
                            dcoldcol.Caption = dcol.ColumnName;
                        GridBoundColumn wgCol = new GridBoundColumn();
                        RadGridNestedControl.MasterTableView.Columns.Add(wgCol);
                        wgCol.DataField = dcol.ColumnName;
                        wgCol.HeaderText = dcol.Caption;
                        wgCol.UniqueName = dcol.ColumnName;
                        wgCol.AllowSorting = true;
                    }

                }


                //Adding Buttons to ParentGrid
                if (this.IsParentRecordEditButton)
                    AddButtonColumnsToGrid("Edit", ResourceLang.GetString("C_Edit"));


                if (this.IsParentRecordAddButton)
                    AddButtonColumnsToGrid("Add", ResourceLang.GetString("C_Add"));

                if (this.IsParentRecordDeleteButton)
                    AddButtonColumnsToGrid("Delete", ResourceLang.GetString("C_Delete"));


                //Detail Table
                GridTableView tableDetailView = new GridTableView(RadGridNestedControl);
                tableDetailView.Width = Unit.Percentage(100);
                tableDetailView.DataSource = dsSource.Tables[1];
                tableDetailView.DataKeyNames = new string[] { this.ChildRelationColumn };
                tableDetailView.PageSize = this.ChildNumberofRecords;
                tableDetailView.Name = "ChildView";

                GridRelationFields relationFields = new GridRelationFields();
                relationFields.MasterKeyField = this.ParentRelationColumn;
                relationFields.DetailKeyField = this.ChildRelationColumn;
                tableDetailView.ParentTableRelation.Add(relationFields);

                //Creating Child Columns
                foreach (DataColumn dcol in dsSource.Tables[1].Columns)
                {
                    if (this.ChildExcludedFields != ServiceNet.BLL.Global.NullString)
                    {
                        if (this.ChildExcludedFields.IndexOf("," + dcol.ColumnName.ToUpper() + ",") < 0)
                        {
                            if (this.ResourceLangPrefix != null && this.ResourceLangPrefix != "")
                                dcol.Caption = ResourceLang.GetString(this.ResourceLangPrefix + "_" + dcol.ColumnName);
                            else
                                dcol.Caption = ResourceLang.GetString(dcol.ColumnName);
                            if (dcol.Caption == string.Empty)
                                dcoldcol.Caption = dcol.ColumnName;
                            GridBoundColumn wgCol = new GridBoundColumn();
                            wgCol.DataField = dcol.ColumnName;
                            wgCol.HeaderText = dcol.Caption;
                            wgCol.UniqueName = dcol.ColumnName;
                            wgCol.AllowSorting = true;
                            tableDetailView.Columns.Add(wgCol);

                        }
                        else
                        {
                            GridBoundColumn wgCol = new GridBoundColumn();
                            tableDetailView.Columns.Add(wgCol);
                            wgCol.DataField = dcol.ColumnName;
                            wgCol.Display = false;
                        }
                    }
                    else
                    {
                        dcol.Caption = ResourceLang.GetString(this.ResourceLangPrefix + "_" + dcol.ColumnName);
                        if (dcol.Caption == string.Empty)
                            dcoldcol.Caption = dcol.ColumnName;
                        GridBoundColumn wgCol = new GridBoundColumn();
                        wgCol.DataField = dcol.ColumnName;
                        wgCol.HeaderText = dcol.Caption;
                        wgCol.UniqueName = dcol.ColumnName;
                        wgCol.AllowSorting = true;
                        tableDetailView.Columns.Add(wgCol);
                    }
                }

                //Adding Buttons to ChildGrid
                if (this.IsChildRecordAddButton)
                    AddButtonColumnsToChildGrid("Add", ResourceLang.GetString("C_Add"), tableDetailView);

                if (this.IsChildRecordEditButton)
                    AddButtonColumnsToChildGrid("Edit", ResourceLang.GetString("C_Edit"), tableDetailView);

                if (this.IsChildRecordDeleteButton)
                    AddButtonColumnsToChildGrid("Delete", ResourceLang.GetString("C_Delete"), tableDetailView);

                RadGridNestedControl.MasterTableView.DetailTables.Add(tableDetailView);
                this.PlaceHolder1.Controls.Add(RadGridNestedControl);
            }
        }

DataSource is passed from Page to the Control through properties of UserControl. So it is not available on Page_Init for the UserControl.

Attached are the screenshots : Beforeexpand - all looks fine. But AfterExpand, the ParentTableRow is not binded. So the images for the added buttons as well as click events are gone.

Please tell me what is missing and how to get it running.

Thanks a lot.

Best Regards,
Veenu Munjal

[Radoslav]

Hi Veenu,

I have examined the code you have post, however based on the supplied information, it is hard to determine what is causing the unwanted behavior at your end. To further track the issue, it will be best if you open a formal support ticket, and send us small working project, demonstrating your logic, and showing the unwanted behavior. You could open a formal support ticket from your Telerik account and attach a ZIP file there. In that way we can reproduce and pinpoint the problems you're facing on our side, understand the logic of your application and provide a solution.

Additionally when you create the grid entirely in the code behind, you should use the Page_Init event handler. For more information, please check out the following online documentation article:
http://www.telerik.com/help/aspnet-ajax/grdprogrammaticcreation.html

Kind regards,
Radoslav
the Telerik team

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