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8.2

Unable to access NewValues of formview

Asked by allanmark in Programming for ASP.NET, Microsoft Visual C#.Net, C# Programming Language

Tags: FormView, ASP.Net

Greetings all

I am trying to access the "NewValues" of a formView Control.

I started out with a DataTable as a Datasource (all done in coide behind) and subsequently read that the NewValues are only available with controls like the SqlDataSource and ObjectDataSource.

I have subsequently converetd my code (attached) to use an ObjectDataSource (all done in code behind) that is bound to a DataTable (hope I've said that correclty!).

When I try to access the NewValues (or OldValues in the "FvSpousal_ItemUpdating" event, they are still null.

What am I misisng?


In advance, thanks!!!

    allanmark 
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CODE BEHIND- BUSINESS LAYER:
 
public static DataTable GetCouple(int coupleId)
        {
            DataTable dtOurCouple = new DataTable();
 
            dtOurCouple = DataAccess.ReturnCouple(coupleId);
 
            return dtOurCouple;
        }
 
 
CODE BEHIND -  THE PAGE:
 
public partial class People : System.Web.UI.Page
{
    private ObjectDataSource ods;
    ...............    
 
    private bool coupleIsFound;
 
 
    protected void Page_Load(object sender, EventArgs e)
    {
        ods = new ObjectDataSource();
 
        if (Page.IsPostBack)
        {
            if (Session["portfolios"] != null)
            {
                dtThePortfolios = (DataTable)Session["portfolios"];
            }
            else
            {
                GetPortfolios();
            }
 
            if (Session["titles"] != null)
            {
                dtTheTitles = (DataTable)Session["titles"];
            }
            else
            {
                GetTitles();
            }
 
            if (Session["couples"] != null)
            {
                Session["selectedCouple"] = lbxCouples.SelectedIndex;
                couplesList = (List<CoupleName>)Session["couples"];
                lbxCouples.DataSource = couplesList;
                lbxCouples.DataTextField = "Name";
                lbxCouples.DataValueField = "Id";
                lbxCouples.DataBind();
                lbxCouples.SelectedIndex = (int)Session["selectedCouple"];
 
                //if (Session["theCouple"] != null)
                if (Session["ods"] != null)
                {
                    ods = (ObjectDataSource)Session["ods"];
                    //theCouple = (DataTable)Session["theCouple"];
                }
                else
                {
                    GetCoupleDetails(couplesList[lbxCouples.SelectedIndex].Id);
                }
            }
            else
            {
                GetCouples();
            }
        }
        else
        {
            // Not PostBack.
            GetPortfolios();
            GetTitles();
 
            GetCouples();                        
            Session["selectedCouple"] = lbxCouples.SelectedIndex;
           
        }
    }
 
    protected void fvSpousal_ItemCommand(object sender, FormViewCommandEventArgs e)
    {
        switch (e.CommandName.ToUpper())
        {
            case "EDIT":
                pnlSelector.Enabled = false;
                fvSpousal.ChangeMode(FormViewMode.Edit);
                BindSpousalFV();
 
                break;
            case "INSERT":
                pnlSelector.Enabled = false;
                fvSpousal.ChangeMode(FormViewMode.Insert);
                BindSpousalFV();
                break;
            case "UPDATE":
 
                break;
            case "DELETE":
 
                break;
            case "CANCEL":
 
                break;
            default:
                break;
        }
    }
 
    protected void FvSpousal_ItemUpdating(Object sender, FormViewUpdateEventArgs e)
    {
        // Todo: No validating (fields present, dates, etc will be done for the prototype.
        //       This will be implemented in Phase 2.
        if (fvSpousal.CurrentMode == FormViewMode.Edit)
        {
            foreach (DictionaryEntry de in e.NewValues)
            {
                theKey = de.Key.ToString();
                theValue = de.Value.ToString();
            }
        }
        else
        {
            // Insert new record.
        }
        
    }
 
    protected void GetCouples()
    {
        couplesList = BusinessLogic.Business.GetCoupleNames(chkActive.Checked, chkInvolved.Checked);
	....................
    }
 
    protected void GetCoupleDetails(int coupleId)
    {        
          ods.ID = "odsCouple";
          ods.SelectMethod = "GetCouple";
          ods.TypeName = "BusinessLogic.Business";
          ods.Selected += new ObjectDataSourceStatusEventHandler(ods_Selected);
 
          if (ods.SelectParameters.Count == 0)
          {
              Parameter workParam = new Parameter("coupleId", DbType.Int32);
              workParam.Direction = ParameterDirection.Input;
              workParam.DefaultValue = lbxCouples.SelectedValue;
              ods.SelectParameters.Add(workParam);
          }
          else
          {
              ods.SelectParameters[0].DefaultValue = lbxCouples.SelectedValue;
          }
 
          ods.Select();
          Session["ods"] = ods;
 
        BindSpousalFV();
 
        //if (theCouple != null)
        if (coupleIsFound)
        {
            Button btnEd = fvSpousal.FindControl("btnEditI") as Button;
            btnEd.Enabled = true;
            Button btnDel = fvSpousal.FindControl("btnDeleteI") as Button;
            btnDel.Enabled = true;
        }
        else
        {
            ScriptManager.RegisterStartupScript(Page, this.GetType(), "id", "alert('Couple record not found. Please contact the Sytem Administrator.');", true);
            lbxCouples.SelectedIndex = 0;
        }
        SetUpdatePanels();
 
    }
 
    protected void GetPortfolios()
    {        
        dtThePortfolios = BusinessLogic.Business.GetPortfolios();
        Session["portfolios"] = dtThePortfolios;        
    }
 
    protected void GetTitles()
    {
        dtTheTitles = BusinessLogic.Business.GetTitles();
        Session["titles"] = dtTheTitles;
    }
 
    protected void chkActive_CheckedChanged(object sender, EventArgs e)
    {
        GetCouples();
        uppnlSelector.Update();
    }
    protected void chkInvolved_CheckedChanged(object sender, EventArgs e)
    {
        GetCouples();
        uppnlSelector.Update();
    }
 
    protected void fvSpousal_DataBound(object sender, EventArgs e)
    {
        // Todo:  With all this repetition, is there not a generic method that we can develop and
        //        just pass it parameters?
 
        // For the ItemTemplate:
 
        DataRowView drv = (DataRowView)fvSpousal.DataItem;
        
        switch (fvSpousal.CurrentMode)
        {
            case FormViewMode.ReadOnly:
                // Portfolio dropdown for couple
                DropDownList ddlPortF_CI = fvSpousal.FindControl("ddlPortfolio") as DropDownList;
 
                // Title dropdown for Spouse2
                DropDownList ddlTitleSP2_CN = fvSpousal.FindControl("ddlTitleSP2_CN") as DropDownList;
		......................................
                break;
        } // switch (fvSpousal.CurrentMode)
 
 
    }
 
    protected void lbxCouples_SelectedIndexChanged(object sender, EventArgs e)
    {
        GetCoupleDetails(couplesList[lbxCouples.SelectedIndex].Id);
        Session["selectedCouple"] = lbxCouples.SelectedIndex;
    }
 
        protected void btnInsertC_Click(object sender, EventArgs e)
    {
        pnlSelector.Enabled = false;
        fvSpousal.ChangeMode(FormViewMode.Edit);
        BindSpousalFV();
 
    }
 
    protected void ods_Selected(object sender, ObjectDataSourceStatusEventArgs e)
    {
        string ggg = e.ReturnValue.GetType().ToString();
        if (e.Exception == null)
        {
            DataTable dt = (DataTable)e.ReturnValue;
            if (dt != null)
            {
                coupleIsFound = true;
            }
            else
            {
                coupleIsFound = false;
            }
        }
        else
        {
            coupleIsFound = false;
        }   
    }
 
    protected void BindSpousalFV()
    {
        string[] keys = { "C_Id" };
        //fvSpousal.DataSource = theCouple;   /// A dataTable
 
        fvSpousal.DataSource = ods;
        fvSpousal.DataKeyNames = keys;
        fvSpousal.DataBind();
    }
 
    protected void SetUpdatePanels()
    {
        uppnlSpousal.Update();
    }
  
}
[+][-]04/28/09 12:58 PM, ID: 24254595Accepted Solution

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About this solution

Zones: Programming for ASP.NET, Microsoft Visual C#.Net, C# Programming Language
Tags: FormView, ASP.Net
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Solution Provided By: allanmark
Participating Experts: 1
Solution Grade: A
 
[+][-]04/28/09 07:45 AM, ID: 24251332Assisted Solution

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[+][-]04/28/09 11:26 AM, ID: 24253611Author Comment

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[+][-]04/28/09 12:03 PM, ID: 24254040Author Comment

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