[Webinar] Streamline your web hosting managementRegister Today

x
?
Solved

Public property of class has incorrect value

Posted on 2009-05-05
4
Medium Priority
?
181 Views
Last Modified: 2013-12-17
Greetings all,

I have a DropDownList (ddlPortfolio_CI),  inside a FormView, that receives it's SelectedValue from another field (C_Portfolio) of the FormView. The dropDown also has a ListItem, added in source, to cater for null values (it;s value is set as ""  which is how a null value from the DB translates, and text as "-- None --",) read from the database.

The update method has as it's pararmeter an object which represents the fields of the FormView (saves tryping each field as a parameter).

When I update  with valid selection (ie sleecting anything other than "-- None --") then the update works fine. If I leave an entry as "-- None --" then I get an " is not a valid value for Int32" message[note: it is complainign about the "" value set for the added listitem] when updating - failure occurs in the public property, "C_Portfolio" of the parameter object.

Any thpoughts on what I should be doing?


In advance, thanks

    allanmark
SOURCE:
 
        <asp:FormView  ID="fvSpousal" runat="server" DefaultMode="ReadOnly" OnDataBound="fvSpousal_DataBound" DataSourceID="spousalODS"
                EnableViewState="true" DataKeyNames="C_Id,SP1_Id,SP2_Id" CssClass="smallFontSize" OnModeChanging="fvSpousal_ModeChanging" 
                OnItemCommand="fvSpousal_ItemCommand" OnItemUpdating="FvSpousal_ItemUpdating" >  
 ................
..................
...................
 <asp:DropDownList  ID="ddlPortfolio_CI" runat="server" DataSourceID="portfolioODS" DataTextField="PF_Title" DataValueField="PF_Id"
                       SelectedValue=<%# Eval("C_Portfolio") %> AppendDataBoundItems="true" Enabled="false">
                    <asp:ListItem Text="--- None ---" Value="" />
                    </asp:DropDownList>                    
........................
.....................
............................
        </asp:FormView>                       
 
        <asp:ObjectDataSource ID="spousalODS" runat="Server" SelectMethod="GetCouple" TypeName="BusinessLogic.Business" 
    OnSelected="spousalODS_Selected" OnSelecting="spousalODS_Selecting" UpdateMethod="SpousalODS_Update" 
     OldValuesParameterFormatString="{0}" DataObjectTypeName="DataTransferObjects.SpouseODS_DO"  OnUpdated="SpousalODS_Updated"   >
            <SelectParameters >
               <asp:QueryStringParameter Name="CoupleId"   DbType="Int32" Direction="Input"  />
            </SelectParameters>           
         </asp:ObjectDataSource>  
                         
 
CODE BEHIND (THE UPDATE M<ETHOD):
 
public static bool SpousalODS_Update(SpouseODS_DO spousal)
        {
            bool updateStatus;
 
            updateStatus = DataAccess.ApplyUpdateSpousal(spousal);
            
            return updateStatus;
        }
 
CODE BEHIND (THE CLASS FOR THE PARAMS OBJECT):
 
using System;
using System.Collections.Generic;
using System.Text;
 
namespace DataTransferObjects
{
    public class SpouseODS_DO
    {
        private int c_Id;
        private string c_Surname;
        private int? c_Portfolio;
	......................
	...................
	.................
 
        public SpouseODS_DO()
        {
 
        }
 
        public int C_Id
        {
            get { return c_Id; }
            set { c_Id = value; }
        }
 
        public string C_Surname
        {
            get { return c_Surname; }
            set { c_Surname = value; }
        }
 
        public int? C_Portfolio
        {
 
            get { return c_Portfolio; }
            set { c_Portfolio = value; }       
 
            }
        }
 
	...............
	...........
 
    }
}

Open in new window

0
Comment
Question by:allanmark
  • 2
  • 2
4 Comments
 
LVL 9

Expert Comment

by:tculler
ID: 24308248
Remember that anything other than a number is unparseable. You need to change "" to null if you're storing it in a nullable int, and certainly from "-- None --" to null, as well. An empty string is not parseable.
0
 

Author Comment

by:allanmark
ID: 24308675
Tried changing "" to null, in the source -- how does one do that?
0
 
LVL 9

Accepted Solution

by:
tculler earned 1000 total points
ID: 24309376
Just set whatever field you're trying to change to null " = null;"
For example, if I have a TextBox named txtExample, and I want the text to be "null", I would do the following:
txtExample.Text = null;

Open in new window

0
 

Author Closing Comment

by:allanmark
ID: 31578179
Many thanks!
0

Featured Post

Take Control of Web Hosting For Your Clients

As a web developer or IT admin, successfully managing multiple client accounts can be challenging. In this webinar we will look at the tools provided by Media Temple and Plesk to make managing your clients’ hosting easier.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Hello there! As a developer I have modified and refactored the unit tests which was written by fellow developers in the past. On the course, I have gone through various misconceptions and technical challenges when it comes to implementation. I would…
Native ability to set a user account password via AD GPO was removed because the passwords can be easily decrypted by any authenticated user in the domain. Microsoft recommends LAPS as a replacement and I have written an article that does something …
SQL Database Recovery Software repairs the MDF & NDF Files, corrupted due to hardware related issues or software related errors. Provides preview of recovered database objects and allows saving in either MSSQL, CSV, HTML or XLS format. Ensures recov…
This video tutorial shows you the steps to go through to set up what I believe to be the best email app on the android platform to read Exchange mail.  Get the app on your phone: The first step is to make sure you have the Samsung Email app on your …
Suggested Courses

591 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question