Conditionally display an image in webgrid - mvc 3
In thegrid.Column
method's format
parameter you are putting together a lambda expression so that you can of course use if
. But the problem is you cannot use @
when you are in "code mode" in Razor to output HTML. So you need to wrap the image tag creation into an HtmlHelper (like the built in Html.ActionLink
there are lots of examples) or use the HTML.Raw method to return HTML:
@grid.GetHtml(
displayHeader: false,
columns: grid.Columns(
grid.Column(format: (item) =>
{
if (item.IsMainPreview == true)
{
return Html.Raw(string.Format("<text><img src=\"{0}\" alt=\"Image\"/></text>", Url.Content("~/Content/images/preview-photo.gif")));
}
else
{
return Html.Raw(string.Format("<text><img src=\"{0}\" alt=\"Image\"/></text>", Url.Content("~/Content/images/non-preview-photo.gif")));
}
}
),
grid.Column(format: (item) => Html.ActionLink("Remove Photo", "RemovePhoto", "Images", new { photoID = item.Id }, new { @class = "RemovePhoto" }))
));
Also in the last line instead of new { photoID = @item.Id }
you should write new { photoID = item.Id }
To learn more about razor here is a detailed tutorial.
Null Pointer
Develops Windows Phone and Windows 8 apps SOreadytohelp
Updated on October 24, 2020Comments
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Null Pointer over 3 years
In my webgrid I need to display images based on the value .. Code is given below
@model TraktorumMVC.Models.ManagePhotos @{ ViewBag.Title = "ManagePhotos"; Layout = "~/Views/Shared/_Layout.cshtml"; var grid = new WebGrid(Model.AdPhotos); } @grid.GetHtml( displayHeader: false, columns: grid.Columns( grid.Column(format: (item) => { if (item.IsMainPreview == true) { return @<text><img src="@Url.Content("~/Content/images/preview-photo.gif")" alt="Image "/></text>; } else { return @<text><img src="@Url.Content("~/Content/images/non-preview-photo.gif")" alt="Image "/></text>; } } ), grid.Column(format: (item) => Html.ActionLink("Remove Photo", "RemovePhoto", "Images", new { photoID = @item.Id }, new { @class = "RemovePhoto" })) ));
I am not sure how can i use
if
in webgrid . I just tried that .Its not working .getting following errorThe best overloaded method match for 'System.Web.Helpers.WebGrid.Column(string, string, System.Func<dynamic,object>, string, bool)' has some invalid arguments
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Joe over 11 yearsThis works great in MVC3. Would you know how to get it to work in MVC4 without the URL.Content. I've posted a new question. stackoverflow.com/questions/13711753/…
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Leniel Maccaferri over 11 yearsI voted this one in the past and it just helped me again. If I could I'd give you 100 votes! :D
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nemesv over 11 years@LenielMacaferi I'm glad that my answer helped you :) you know that there is a bounty system on SE ;)
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Leniel Maccaferri over 11 yearsYes, I know. The bounty system is for the case when there's no accepted answer and one wants someone else to give a better answer to that unanswered question. :)
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sivaL almost 11 yearsGreat, I struggled for more than one hour to get this.. thanks