repeater control

Posted on 2007-11-17
Last Modified: 2012-06-21
I'm using  a repeater control in my ASP.NET page using C#.  Within that repeater control, i want to have an image show depending on a certain value pulled back from the database.  Not sure how to do that?
(my repeater control works)
  Here's my code below:

                        <td><b>Year:</b> <%# DataBinder.Eval(Container.DataItem,"EventYear") %></td>
                        <td><b>Name:</b>  <%# DataBinder.Eval(Container.DataItem,"Name") %></td>
                        <td><b>Email Address:</b> <%# DataBinder.Eval(Container.DataItem,"EmailAddress") %></td>
                        <td><b>Course: // this is where I want a certain image to go depending on value in db</b></td>
                        <td><b>Organization: // this is where I want a certain image to go depending on value in db</b></td>
                        <td><b>Pros:</b><%# DataBinder.Eval(Container.DataItem,"Pros") %></td>
                        <td><b>Cons:</b> <%# DataBinder.Eval(Container.DataItem,"Cons") %></td>
                        <td><b>Comments:</b><%# DataBinder.Eval(Container.DataItem,"Comments") %></td>
                        <td><hr /></td>
Question by:geoffsweb
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LVL 16

Expert Comment

ID: 20305066
First, put image controls in where you want the images to be displayed.  In my sample, they have IDs "imgCourse" and "imgOrg".  Don't supply an ImageUrl.  Then in code behind, put in the code.  I wrote this up in VB and then converted to C#, so let me know if it doesn't work right, but that's the general idea.  It will run this for each row, get the value from the DB, in this case the field is "FieldToCheck", and then does a case can change it for true/false, etc.

# protected void SelectImages(object sender, RepeaterItemEventArgs e)
# {
#     if (e.Item.ItemType == ListItemType.Item | e.Item.ItemType == ListItemType.AlternatingItem) {
#         string DBValue = DataBinder.Eval(e.Item.DataItem, "FieldToCheck").ToString;
#         Image imgCourse = e.Item.FindControl("imgCourse");
#         Image imgOrg = e.Item.FindControl("imgOrg");
#         switch (DBValue) {
#             case "1":
#                 imgCourse.ImageUrl = "course1.jpg";
#                 imgOrg.ImageUrl = "org1.jpg";
#                 break;
#             case "2":
#                 ..etc();
#                 break;
#         }
#     }
# }

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Author Comment

ID: 20305085
and this can be worked right into a Repeater control??
LVL 16

Accepted Solution

anoyes earned 20 total points
ID: 20305314
Yup, just goes in the codebehind for you page, or gets wrapped in a <script runat="server"></script> tag on the page itself.  Those # symbols need to come out..don't know how they got in there.  The one thing I forgot was that you have to add OnItemDataBound="SelectImages" to the <asp:Repeater> tag.

Author Comment

ID: 20305460
ok, I think i'm getting close (well, you are !).... I"ve got it all set up, but when I compile it, I get this error:

Cannot implicitly convert type 'System.Web.UI.Control' to 'System.Web.UI.WebControls.Image'. An explicit conversion exists (are you missing a cast?)

on this line:
Image imgCourse = e.Item.FindControl("imgCourse");


I really appreciate the help....

Author Comment

ID: 20305968
figured it out... was missing the (image) in front of e.Item.FindControl("imgCourse");
so it should have been:
Image imgCourse = (Image)e.Item.FindControl("imgCourse");
thanks for the help !!

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