ASP.NET,AJAX, SPGridView

wagswvu

I am trying to enclose SPGridView inside an UpdatePanel control in a user control page (.ascx), however whenever I click on the paging links for the grid, it still postbacks instead of partial page rendering. Also, this is not the first time I have used ajax in my project. I have taken the same code that has worked on other controls and applied them to the SPGridvew with no success. Below is a sample of the user control page in question with my override childcontrols. Any thoughts?

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protected override void CreateChildControls()

        {

            // Register the AJAX ScriptManager

            ScriptManager ajaxScriptManager = ScriptManager.GetCurrent(this.Page);
 
            if (ajaxScriptManager == null)

            {

                ajaxScriptManager = new ScriptManager();

                ajaxScriptManager.ID = "AJAXScriptManager";

                ajaxScriptManager.EnablePartialRendering = true;

                this.Controls.Add(ajaxScriptManager);

            }
 
            EnsureAJAXUpdatePanelCompatibility();
 
            ajaxUpdatePanel = new UpdatePanel();

            ajaxUpdatePanel.ID = "AJAXUpdatePanel";

            ajaxUpdatePanel.ChildrenAsTriggers = true;

            ajaxUpdatePanel.UpdateMode = UpdatePanelUpdateMode.Conditional;

            this.Controls.Add(ajaxUpdatePanel);
 
            currentSite = SPContext.Current.Web;
 
            using (ListCaml listCaml = new ListCaml(currentSite))

            {

                searchID = ((SearchLibraryResultsPage)this.Page).searchID;                

                searchResultInfo = SearchProcessController.GetSearchResultInfo(searchID);
 
                using (Fields fields = new Fields())

                {

                    searchResultsInfoArray = fields.CreateStringValueArray(searchResultInfo);

                }
 
                elapsedTime = Convert.ToDouble(searchResultsInfoArray[0]);

                setNumber = Convert.ToInt16(searchResultsInfoArray[1]);

                rowStart = Convert.ToInt16(searchResultsInfoArray[2]);

                rowCount = Convert.ToInt16(searchResultsInfoArray[3]);

                isNextSet = Convert.ToBoolean(searchResultsInfoArray[4]);

                sortManagedProperty = searchResultsInfoArray[5];

                sortDirection = searchResultsInfoArray[6];
 
                searchResultsDT = (DataTable)Cache["SearchResults_" + searchID.ToString()];

                searchCriteriaDT = (DataTable)Cache["SearchCriteria_" + searchID.ToString()];               
 
                gridView = new SPGridView();

                searchResultsDV = new DataView(searchResultsDT);

                gridView.DataSource = searchResultsDV;             
 
                //CreateViewColumnMenu();
 
                searchCriteria = new StringBuilder();
 
                foreach (DataRow libraryFieldsDR in searchCriteriaDT.Rows)

                {

                    if (libraryFieldsDR["Value"].ToString() != string.Empty)

                    {

                        CreateSearchCriteriaList(libraryFieldsDR["Column_Name"].ToString(), libraryFieldsDR["Literal_Operator"].ToString(),

                                                 libraryFieldsDR["Data_Type"].ToString(),libraryFieldsDR["Value"].ToString());                       

                    }
 
                    if (libraryFieldsDR["Column_Name"].ToString() != "Path")

                    {

                        SPBoundField boundField = new SPBoundField();

                        boundField.HeaderText = libraryFieldsDR["Column_Name"].ToString();

                        boundField.DataField = libraryFieldsDR["Managed_Property"].ToString();                    

                        boundField.SortExpression = libraryFieldsDR["Managed_Property"].ToString();

                        gridView.Columns.Add(boundField);

                    }

                }

                gridView.AutoGenerateColumns = false;

                gridView.AllowSorting = true;

                gridView.AllowPaging = true;

                gridView.PagerSettings.Position = PagerPosition.Top;

                gridView.PagerSettings.Mode = PagerButtons.NumericFirstLast;

                gridView.PagerSettings.PageButtonCount = 5;               

                gridView.PageSize = listCaml.GetSearchResultLimits(Convert.ToInt16(Session["Current_LibraryID"]), SharePointSearch.resultsPerPage);

                gridView.Sorting += new GridViewSortEventHandler(gridView_Sorting);

                gridView.PageIndexChanging += new GridViewPageEventHandler(gridView_PageIndexChanging);
 
                ajaxUpdatePanel.ContentTemplateContainer.Controls.Add(gridView);

                //PagerTemplate must be added after you added the control, but before you bind your data

                gridView.PagerTemplate = null;

                gridView.DataBind();
 
                //AddResultsInformation();
 
                //Preserves the sorting when page is reload

                if ((!Page.IsPostBack) && (sortManagedProperty != string.Empty) && (sortDirection != string.Empty))

                {

                    ViewState["SortExpression"] = sortManagedProperty;

                    ViewState["SortDirection"] = sortDirection;

                    AddSortColumnArrows(gridView.HeaderRow,sortManagedProperty, sortDirection);

                    gridView.DataBind();

                }

            }

        }

wagswvu

Well after many of hours messing with this, I decided to just double check that the UpdatePanel was even working. So I added a TextBox and a Button with an EventHandler that would clear the text out of the TextBox. To my amazement, when I added those two controls the SPGridView started working... I did a few more experiments and soon I discovered that by just having a TextBox control visible on the screen would allow the SPGridView to work with the UpdatePanel. Take it off the page and SPGridView is back to full postbacks. I am now completely mystified on what’s going on, anybody have an idea?

ASP.NET,AJAX, SPGridView

re: ASP.NET,AJAX, SPGridView

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