Hello,

I'm trying to fill a GridView with some dynamic XmlDocument, and for now, it works pretty well.

Here is what I have :

//This array of XmlDocument is the result of a search on a database with some proprietary classes
XmlDocument[] TableauNotices = simImport.XMLDOMDocumentArray(IdentifiantsNotices, false, true, 0, "", true, true, true);
GridViewCible.DataSource = TableauNotices;
GridViewCible.DataBind();

<asp:TemplateField ItemStyle-CssClass="CelluleResultat">
    <ItemTemplate>
        <%# "Titre : <em><strong>" + XPath("INTERPRETATION_OEUVRE/DESCRIPTION/OEUVRE_LIBRE/TITRE") + "</strong></em><br />"%>
        <%# "Auteur : <em>" + XPath("INTERPRETATION_OEUVRE/DESCRIPTION/OEUVRE_LIBRE/AUTEUR") + "</em><br />"%>
    </ItemTemplate>
</asp:TemplateField>

Now what I would like to do is check whether a node of my XmlDocument is empty, so it won't show "Titre : " and nothing after it but just jump this line. This code sample doesn't work :

<%# (XPath("INTERPRETATION_OEUVRE/DESCRIPTION/OEUVRE_LIBRE/TITRE") == "") ? "" : "Titre : <em><strong>" + XPath("INTERPRETATION_OEUVRE/DESCRIPTION/OEUVRE_LIBRE/TITRE") + "</strong></em><br />"; %>

AND, I would like to be able to display as many lines as there are nodes in a node list. Something like :

<%# foreach (XPath("INTERPRETATION_OEUVRE/DESCRIPTION/OEUVRE_LIBRE/DIFFERENT_TITLE") "Different title : <em><strong>" + XPath("INTERPRETATION_OEUVRE/DESCRIPTION/OEUVRE_LIBRE/DIFFERENT_TITLE") + "</strong></em><br />"; %>

How can I do all of this without destroying too much what I already achieved?

Thank you for your help.

It's funny, we were just talking about this at work... one of the developers was using the <%# %> stuff... and I was trying to explain that he was painting himself into a corner... He got the "value here"... then the "ooh, I need this or this... Ahh Trinary Operator!"... then it hit... he wanted more :)

My suggestion to him, and you is the same - Take your sever side code server side :)

I was excepting such an answer. The problem is : I'm not very at ease with code behind.

Could you give just a tiny little example? Or a couple of key words to know what to look after?

Hi:

  You can simply compare it with NULL instead of empty string:

<%#XPath("INTERPRETATION_OEUVRE/DESCRIPTION/OEUVRE_LIBRE/TITRE")==null?"NULL":"NOT NULL"%>
 

  If your problem isn't solved, please inform us.

Regards

Hi, Strato:

Here is an example to show how to call the server-side method in aspx file:

<%# GetTitre("INTERPRETATION_OEUVRE/DESCRIPTION/OEUVRE_LIBRE/TITRE")%>

Code-Behind:

    protected string GetTitre(string path)
    {
        string value = XPath(path);
        if (value != "")
        {
            "Titre : <em><strong>" + value + "&lt;/strong></em><br />";
        }
        else
        {
            return "";
        }
    }

Thank you. It helped a lot.

<asp:TemplateField>
  <ItemTemplate>
    <%# FormateInterpretation("INTERPRETATION_OEUVRE/DESCRIPTION/OEUVRE_LIBRE/TITRE") %>
    <%# FormateInterpretation("INTERPRETATION_OEUVRE/DESCRIPTION/OEUVRE_LIBRE/AUTEUR") %>
  </ItemTemplate>
</asp:TemplateField>

    protected string FormateInterpretation(string Path)
    {
        string TexteNoeud = XPath(Path).ToString();

        if (TexteNoeud != string.Empty)
        {
            if (Path.EndsWith("TITRE"))
                return TexteNoeud = "&#9679; Titre : <span style='font-weight: bold; font-style: italic'>" + TexteNoeud + "&lt;/span><br />";
            else if (Path.EndsWith("AUTEUR"))
                return TexteNoeud = "&#9674; Auteur : <span style='font-style: italic'>" + TexteNoeud + "&lt;/span><br />";
            else
                return string.Empty;
        }
        else
            if (Path.EndsWith("TITRE"))
                return TexteNoeud = "&#9679; Titre : <span style='font-weight: bold; font-style: italic; color: #FF0000'>Pas de titre!</span><br />";
            else if (Path.EndsWith("AUTEUR"))
                return TexteNoeud = "&#9674; Auteur : <span style='font-style: italic; color: #FF0000'>Pas d'auteur!</span><br />";
            else
                return string.Empty;
    }

But I have one problem left : how to display as many results as there are nodes matching my XPath expression. Something like that :

<%# foreach (XmlNode Test in XPath("OEUVRE/DESCRIPTION/TITRE_FORME_REJETEE/TITRE_OEUVRE")) { "&#187; Autre titre : <em>" + XPath("OEUVRE/DESCRIPTION/TITRE_FORME_REJETEE/TITRE_OEUVRE") + "</em><br />" } %>

Hi, Strato:

Here is an example to show how to use Repreater to display multiple nodes in a FormView.

http://msdn2.microsoft.com/zh-cn/library/73yw7ttd(VS.80).aspx

If you don't want to add an additional control, you should use XPathSelect method, like:

  protected string getNodes(string path)
    {
        IEnumerator ie = XPathSelect(path).GetEnumerator();
        string nodes = "";
        while (ie.MoveNext())
        {
            System.Xml.XmlElement element = ie.Current as System.Xml.XmlElement;
            nodes += "Titre : <em><strong>" + element.Value + "&lt;/strong></em><br />";
        }
        return nodes;
    }

It's PERFECT, except it works better with element.InnerText instead of element.Value.

Thank you very much.