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HistoryPoint doesn't work after hyperlink clicked and come back with ListView sorted

Posted on 2008-09-29
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Last Modified: 2013-11-08
Hi, I have a ListView putted inside UpdatePanel which can be sorted and paged. HistoryPoint works only in the page itself, but once I clicked the link in the row of the ListView to go to a different page and come back, the last history point is not the point I left. I inserted the code AddHistoryPoint to LinkButton_dClicke event method so that once the link was clicked, the history point is created with the page number and sorted column name and sort method(ascending or desending). But when I come back to the ListView from the detail page, it doesn't show  the list that I left. Here are the codes;


private void AddHisotryPointAmount(string sortExpression, SortDirection sortDirection)

    {

        if (ScriptManager1.IsInAsyncPostBack && !ScriptManager1.IsNavigating)

        {

            string v = string.Empty;

            if (sortDirection == SortDirection.Ascending)

                v = "ASC:" + sortExpression;

            else

                v = "DES:" + sortExpression;
 

            v += "PAGENUM:" + DataPager1.StartRowIndex;

            ScriptManager1.AddHistoryPoint("A", v);

        }

    }
 
 

    protected void ScriptManager1_Navigate(object sender, HistoryEventArgs e)

    {

        int cState = e.State.Keys.Count;

        if (cState < 1)

        {

            //the list is in initial state. never sorted or paged. 

        }

        else

        {

           // string lastStateKey = e.State.Keys[cState-1];

            //string lastStateValue = e.State[lastStateKey];

            string lastStateKey = e.State.Keys[0];

            string lastStateValue = e.State[0];
 

            if (lastStateKey == "P")

            {

                int pageNum = Int32.Parse(lastStateValue);

                DataPager1.SetPageProperties(pageNum, DataPager1.PageSize, true);

            }

            else if (lastStateKey == "S")

            {

                string sortExpression = string.Empty;

                if (lastStateValue.IndexOf("ASC:") > -1)

                {

                    sortExpression = lastStateValue.Substring(lastStateValue.IndexOf("ASC:") + 4);

                    ListView1.Sort(sortExpression, SortDirection.Ascending);

                }

                else if (lastStateValue.IndexOf("DES:") > -1)

                {

                    sortExpression = lastStateValue.Substring(lastStateValue.IndexOf("DES:") + 4);

                    ListView1.Sort(sortExpression, SortDirection.Descending);

                }

            }

            else if (lastStateKey == "A")

            {

                string sortExpression = string.Empty;

                if (lastStateValue.IndexOf("ASC:") > -1)

                {

                    sortExpression = lastStateValue.Substring(lastStateValue.IndexOf("ASC:") + 4, lastStateValue.IndexOf("PAGENUM:")-(lastStateValue.IndexOf("ASC:") + 4));

                    ListView1.Sort(sortExpression, SortDirection.Ascending);

                }

                else if (lastStateValue.IndexOf("DES:") > -1)

                {

                    sortExpression = lastStateValue.Substring(lastStateValue.IndexOf("DES:") + 4, lastStateValue.IndexOf("PAGENUM:") - (lastStateValue.IndexOf("DES:") + 4));

                    ListView1.Sort(sortExpression, SortDirection.Descending);

                }

                int pageNum = Int32.Parse(lastStateValue.Substring(lastStateValue.IndexOf("PAGENUM:")+8));

                DataPager1.SetPageProperties(pageNum, DataPager1.PageSize, true);

            }

            else { }

            

        }

        

    }
 
 
 

protected void ListView1_ItemCommand(object sender, ListViewCommandEventArgs e)

    {

        try

        {

            LinkButton lnkTotalCondidate = (LinkButton)e.CommandSource;

            LinkButton lnkTotal = (LinkButton)e.Item.FindControl("lnkTotal");
 

            if (lnkTotalCondidate.ID == lnkTotal.ID)

            {

                AddHisotryPointAmount(ListView1.SortExpression,ListView1.SortDirection);

                Response.Redirect("SingleReceipt.aspx?ResNo=" + lnkTotal.Attributes["ResNo"]);

            }

        }

        catch (Exception ex)

        {

            ;

        }

        

    }

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Question by:crcsupport
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crcsupport earned 0 total points
ID: 22602946
I solved the problem. I had to insert historypoint for both paging and sorting everytime no matter what action(paging, sorting, leaving the page to another page).  I like AJAX how they work with no flash, but sometimes it's very headache to find bug when coding.
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