change an images alt text server side

[trampman]

Hi all

I'm trying to change the alt text of some images dynamically. all the content for the page including links url copy and image alt text is stored in a db so when a user changes the language preference the site copy changes etc.

this is what i have so far

i have a dataset that is cached from the db then i loop through each row

foreach (DataRow theRow in ds.Tables[0].Rows)
{foreach (DataRow theRow in ds.Tables[0].Rows)
{
string control = theRow["ContentId"].ToString();
HtmlContainerControl ctrl = FindControlRecursive(this, control) as HtmlContainerControl;
if (ctrl != null)
{
    if (theRow["ContentType"].ToString() == "text")
    {
	ctrl.InnerHtml = theRow["PageContent"].ToString();
    }
    if (theRow["ContentType"].ToString() == "link")
    {
	//ctrl.HRef = theRow["PageContent"].ToString();
	//doesnt work 
    }
    if (theRow["ContentType"].ToString() == "alt")
    {
	//ctrl.Alt = theRow["PageContent"].ToString();
	//doesnt seem to find the control and even if i hard code the the id in it doesnt work
    }
}
}

an example of my images is
<img class="socialIc on" src="/images/facebook.png" id="facebookIco n" runat="server" alt="Facebook icon" width="24" height="20" border="0" />

and an example of my link is
<a href="http://www.facebook.co m" target="_blank" id="facebookHre f" runat="server">

thanks

[Frinavale]

I strongly recommend changing your HTML <img> and <a> into ASP.NET controls (the Image control and the HyperLink control) so that you can easily accomplish what you want to do in your server-side code.

You also may want to look into the .NET concepts for Localization and Globalization.

-Frinny

[danp129]

Using the server controls like so:

    <form id="form1" runat="server">
    <ul style="list-style-type: none">
        <li>
            <asp:Image ID="Image1" runat="server" src="pic1.gif" AlternateText="old1" /><asp:hyperlink runat="server" ID="Link1"> LinkText1</asp:hyperlink>
        </li>
        <li>
            <asp:Image ID="Image2" runat="server" src="pic1.gif" AlternateText="old2" /><asp:hyperlink runat="server" ID="Link2"> LinkText2</asp:hyperlink>
        </li>
        <asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/pic1.gif" AlternateText="old1"  />
    </ul>
    </form>

This will work (Written in VB and converted to C#!)

using Microsoft.VisualBasic;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Data.SqlClient;
partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, System.EventArgs e)
    {
        DataSet ds = MakeMockDataset();
        if (Page.IsPostBack) {
        } else {
            foreach (DataRow theRow in ds.Tables[0].Rows) {
                string control = theRow["ContentId"].ToString();

                // You'll need your recursive find control function if the image is wrapped inside the hyperlink
                object ctrl = this.FindControl(control);

                if (ctrl is HyperLink) {
                    //Dim MyLink As HyperLink = ctrl
                    //MyLink.Text = theRow("PageContent")
                    ctrl.Text = theRow["PageContent"];
                } else if (ctrl is Image) {
                    //Dim MyImage As Image = ctrl
                    //MyImage.AlternateText = theRow("PageContent")
                    ctrl.AlternateText = theRow["PageContent"];
                }
            }
        }
    }
    public DataSet MakeMockDataset()
    {
        DataSet ds = new DataSet();
        ds.Tables.Add("test");
        var _with1 = ds.Tables[0];
        _with1.Columns.Add(new DataColumn("ContentId"));
        _with1.Columns.Add(new DataColumn("ContentType"));
        _with1.Columns.Add(new DataColumn("PageContent"));
        _with1.Rows.Add(new string[] {
            "Link1",
            "link",
            "http://bytes.com/"
        });
        _with1.Rows.Add(new string[] {
            "Image1",
            "alt",
            "Text for my first image"
        });
        _with1.Rows.Add(new string[] {
            "Link2",
            "link",
            "http://bytes.com/"
        });
        _with1.Rows.Add(new string[] {
            "Image2",
            "alt",
            "Text for my second image"
        });
        return ds;
    }
    public _Default()
    {
        Load += Page_Load;
    }
}