parseable xml with usercontrolwrapper not working

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Jeroen Breuer 4908 posts 12265 karma points MVP 5x admin c-trib

Jun 24, 2013 @ 14:22

Hello,

I working on a custom datatype. For now I'm only trying to store a custom object in the xml, but it's not stored as real xml. Here is the code:

VoteFormViewer.ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="VoteFormViewer.ascx.cs" Inherits="WebApplication.DataTypes.VoteFormViewer.VoteFormViewer" %>
<asp:HiddenField ID="HiddenVoteValue" runat="server" />
Show values later...

VoteFormViewer.ascx.cs

public partial class VoteFormViewer : UserControl, IUsercontrolDataEditor
{
    #region Properties

    #region IUsercontrolDataEditor Members

    public object value
    {
        get
        {
            return SerializationHelper.ValueToXmlString(HiddenVoteValue.Value);
        }
        set
        {
            Vote vote = new Vote();

            HiddenVoteValue.Value = SerializationHelper.ValueToXmlString(vote);
        }
    }

    #endregion

    #endregion

    protected void Page_Load(object sender, EventArgs e)
    {

    }
}

Here is the test class I'm trying to serialize in xml:

public class Vote
{
    public int TestVal1 {get; set;}
    public int TestVal2 { get; set; }
    public int TestVal3 { get; set; }
}

This is the xml I'm getting in the Umbraco.config:

<voteFormViewer>
  <string>&lt;?xml version="1.0"?&gt;&lt;Vote xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"&gt;&lt;TestVal1&gt;0&lt;/TestVal1&gt;&lt;TestVal2&gt;0&lt;/TestVal2&gt;&lt;TestVal3&gt;0&lt;/TestVal3&gt;&lt;/Vote&gt;</string>
</voteFormViewer>

If I try to deserialize it again I'm getting an error because it's not real xml. Any idea what goes wrong here? I'm using Umbraco 4.7.2. I looked at the value which is returned from HiddenVoteValue.Value, but it's not encoded or something.

Jeroen

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Dirk De Grave 4541 posts 6021 karma points MVP 3x admin c-trib

Jun 24, 2013 @ 14:26

0

Most probably because of ntext vs nvarchar storage of your datatype value! Have had this before...

/Dirk

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Jeroen Breuer 4908 posts 12265 karma points MVP 5x admin c-trib

Jun 24, 2013 @ 14:28

0

I'm storing it as ntext because nvarch is too short.

Jeroen

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Jeroen Breuer 4908 posts 12265 karma points MVP 5x admin c-trib

Jun 24, 2013 @ 14:31

0

I've been using this blog as a reference: http://www.nibble.be/?p=100

Jeroen

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Comment author was deleted

Jun 24, 2013 @ 14:33
Hey Jeroen,

in your getter you are serializing the HiddenVoteValue.Value and that will be a string... you should feed it an object of type vote
```
get
        {
            returnSerializationHelper.ValueToXmlString(HiddenVoteValue.Value);
        }
```
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Comment author was deleted

Jun 24, 2013 @ 14:35

In the example on my blog the customControl.Value is of type List<string>

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Jeroen Breuer 4908 posts 12265 karma points MVP 5x admin c-trib

Jun 24, 2013 @ 14:40

Hi Tim,

I marked your post as the solution because it pointed me in the right direction. This is my code now:

public partial class VoteFormViewer : BaseUserControl, IUsercontrolDataEditor
{
    #region Properties

    #region IUsercontrolDataEditor Members

    public object value
    {
        get
        {
            return ViewState["VoteValue"];
        }
        set
        {
            Vote vote = new Vote();

            ViewState["VoteValue"] = SerializationHelper.ValueToXmlString(vote);
        }
    }

    #endregion

    #endregion

    protected void Page_Load(object sender, EventArgs e)
    {

    }
}

Because the HiddenVoteValue.Value (or ViewState which I'm using now) is already a string I don't need to use the SerializationHelper.ValueToXmlString. Thanks for helping!

Jeroen

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Comment author was deleted

Jun 24, 2013 @ 14:40

So should be more like

public class Vote

        public int TestVal1 { get; set; }

        public int TestVal2 { get; set; }

        public int TestVal3 { get; set; }

    public partial class MultipleValuesDatatype : System.Web.UI.UserControl

        , umbraco.editorControls.userControlGrapper.IUsercontrolDataEditor

        protected void Page_Load(object sender, EventArgs e)

            if (!Page.IsPostBack)

                /// do something with vote

        private Vote vote;

        public object value

get

                //get the object value( just creating a new one now)

                Vote v = new Vote();

                return SerializationHelper.ValueToXmlString(v);

set

                if (value != null && string.IsNullOrEmpty(value.ToString()))

                    vote = new Vote();

                else

                    vote = (Vote)SerializationHelper.ValueFromXmlString(value, typeof(Vote));

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Jeroen Breuer 4908 posts 12265 karma points MVP 5x admin c-trib

Jun 24, 2013 @ 14:44

0

A little more info about this might be useful. I'm tryin to create a datatype which only shows data in the datatype with the option to export. So in the set I need to do some stuff to display the data and in the get only return that same data again because it can't be changed in Umbraco. That's why the viewstate is fine. The data will be changed on the front of the website with the Umbraco Document api.

Jeroen

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