I have a file upload program written in ASP.NET MVC. It is currently on my local development machine, and I would like to know how (if it is possible) to generate a link for each uploaded file so when it is clicked, the item is displayed/downloaded etc.
Current code/markup that handles displaying file list:
<table>
<tr>
<th></th>
<th>
Name
</th>
<th>
Length
</th>
<th></th>
</tr>
<%
var path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "uploads");
foreach (var file in Directory.GetFiles(path))
{
var item = new FileInfo(file);
%>
<tr>
<td></td>
<td>
<%=Html.Encode(Path.GetFileName(item.Name))%>
</td>
<td>
<%=Html.Encode(item.Length >= 1024 ? item.Length / 1024 + " kilobytes" : item.Length + " bytes")%>
</td>
<td>
// This is the line in question. Does not work as-is.
<%= Html.Encode(Path.GetFileName(item.Name)) %>
</td>
</tr>
<% } %>
</table>
I imagine I will have to change the file-handling code around once this goes live, but for now this is sufficient. Suggestions are also welcome :)
Thanks!
Use Url.Content, e.g.:
<img src="<%= Url.Content("~/Content/UserImages/FileName.jpg") %>" />
The tilde means "the root of my site, wherever that happens to be." You don't have to put your files in Content; you can put them wherever you want under your site root.
Yes the appropriate equivalent to BaseDirectory in an ASP.NET app is HttpRuntime.AppDomainAppPath. However you might also find the Server.MapPath method useful. You get to the server method via HttpContext.Current.Server.
Having said that are you sure you want this sort of code in your view. Its seems to me that the list of values you want to display ought to be generated by the controller.
<a href="<%= Url.Content(System.Web.VirtualPathUtility.ToAppRelative("~/" + file.Substring(AppDomain.CurrentDomain.BaseDirectory.Length))) %></a>
Related
I was browsing the last hours to find a solution for my problem with latest puppeteer (2.0.0) / chromium 78.0.x to get our printing system working. We allow to setup page breaks in tables, which worked find in PhantomJS renderer, but not in the puppeteer/chromium solution.
Beside many little difference in global css and printing PDF header/footer the printing of tables was the last problem (hopefully).
It turns out that the "page-break-before: always" is simply ignored.
Example:
<table>
<thead> ... </thead>
<tbody> ...
<tr style="page-break-before: always;"> ...should be on next page ... </tr>
</tbody>
</table>
Some of the Chrome forum articles point out, this has been solved.
So the question is what is causing the problem.
Regards,
Andre
PS) Later we found now: put a "display: block" on all tags of the table solves the problem. Maybe that helps someone. Any comments on that?
<table style="display: block;">
<thead style="display: block;"> ... </thead>
<tbody style="display: block;"> ...
<tr style="display: block; page-break-before: always;"> ...is now on the next page ... </tr>
</tbody>
</table>
Bad news for the solution we provided above. This destroys the feature of having table headers on each page.
setup 1)
Setting "display: block;" for the thead will disable the feature of having the table header on each page.
==> no page break
setup 2)
Set the thead to "display: table-header-group;" and tbody to "table-row-group" then the chrome will ignore the page-breaks.
==> no table headers on each page
setup 3) Having the thead: "display: table-header-group;" and the tbody: "display: block" is destroying the column structure. The body will be rendered only on the first column.
==> Destroys the table. the body is just in the first column
Here comes our hack to solve the problem. we use setup 3, with this:
- we build a table with just one column
- the column contains a table with all columns we really want to render
- the column widths are set to fix values (that was anyway the case in our rendering system)
<table>
<thead>
<tr>
<td> <table> .... the header of the real table </table> </td>
</tr>
</thead>
<tbody style="display:block;">
<tr>
<td>
<table> .... one row of the real table </table>
<td>
</tr>
<tr>
<td>
<table> .... another row of the real table </table>
<td>
</tr>
</tbody>
</table>
I have an MVC Razor view that pulls change log information from a database (a table which only I have access to, limiting security concerns).
<table class="table">
<tr>
<th>
#Html.DisplayNameFor(model => model.Description)
</th>
</tr>
#foreach (var item in Model) {
<tr>
<td>
#Html.DisplayFor(modelItem => item.Description)
</td>
</tr>
}
</table>
The description will contain values like New page available: http://localhost:0000/app/NewItem. What I'm trying to figure out is how to make that web address active.
I.e., turn New page available: http://localhost:0000/app/NewItem
into: New page available: http://localhost:0000/app/NewItem
and have the link properly rendered on the page. Is there a simple way to accomplish this, short of using regular expressions in the controller to pull that link out?
I have the following markup as a part of a Razor view:
<table>
<caption>Presidents</caption>
<thead>
<tr>
<th scope="col">Name</th>
<th scope="col">Born</th>
<th scope="col">Died</th>
</tr>
</thead>
<tbody>
<tr>
<th scope="row">Washington</th>
<td>1732</td>
<td>1799</td>
</tr>
<!-- etc -->
</tbody>
</table>
With the "target schema for validation" set to HTML5, Visual Studio complains thusly:
Warning 1 Validation (HTML5): Element 'th' must not be nested within element 'tbody tfoot'.
Is this really true? If so, could someone link to the spec?
My understanding was that using <th> for row headers was not just legal but encouraged. It certainly seems fairly common, I could link dozens of tutorials explaining (seemingly sensibly) that it helps with accessibility.
Is this a VS bug? A real change coming with HTML5 (a good one? a bad one?)? What's the story?
My understanding was that using <th> for row headers was not just legal but encouraged
As far as I know, this was always legal in HTML 4 (and possibly its predecessors), and hasn't changed in HTML5.
W3C's HTML5 validator, while still experimental, reports no warnings or errors. Then again, I'm sure the HTML5 validation Visual Studio is using is experimental as well since HTML5 itself hasn't yet been finalized.
The HTML5 spec on marking up tabular data, specifically section 4.9.13, shows the use of <th> within <tbody> and <tfoot> to scope row data:
<table>
<thead>
<tr>
<th>
<th>2008
<th>2007
<th>2006
<tbody>
<tr>
<th>Net sales
<td>$ 32,479
<td>$ 24,006
<td>$ 19,315
<tr>
<th>Cost of sales
<td> 21,334
<td> 15,852
<td> 13,717
<tbody>
<tr>
<th>Gross margin
<td>$ 11,145
<td>$ 8,154
<td>$ 5,598
<tfoot>
<tr>
<th>Gross margin percentage
<td>34.3%
<td>34.0%
<td>29.0%
</table>
So it's perfectly legitimate to have <th> elements inside <tr> elements inside either a <tbody> or <tfoot>. As it should be anyway, since table headings aren't just found on table headers.
The HTML5 spec only requires that it be inside a tr, and the spec actually includes an example with a th nested inside a tbody.
Generally a TH in a THEAD will have a scope value of "col" while a TH in a TBODY will have a scope value of "row".
I have a user control: VendorDDL.ascx, with the following code:
<%# Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<List<MeetingCalendar.Models.Vendor>>" %>
<table>
<tr>
<th></th>
<th>
VendorId
</th>
<th>
VendorName
</th>
</tr>
<% foreach (var item in Model) { %>
<tr>
<td></td>
<td>
<%= Html.Encode(item.VendorId) %>
</td>
<td>
<%= Html.Encode(item.VendorName) %>
</td>
</tr>
<% } %>
</table>
My view: Create.aspx, has the following code snippet:
<p>
<label for="VendorNameSearch">Vendor Name:</label>
<input type="text" name="VendorNameSearch" id="VendorNameSearch" style="width:100px" />
<input type="submit" value="search" />
</p>
<% Html.RenderPartial("VendorDDL", MeetingCalendar.Controllers.HomeController.VendorsToSelect); %>
And everything works fine when I load up the Create view. The VendorDDL control is populated with the default values that are found in the VendorsToSelect. My controller has a List<Vendor> VendorsToSelect, which is getting updated properly.
Here is the problem: when the user clicks the SEARCH button, this fires off code in the Controller: return PartialView("VendorDDL", VendorsToSelect); I can see that VendorsToSelect is getting populated correctly based upon the user search.
I can step through the code, line-by-line, and see that immediately after return PartialView("VendorDDL", VendorsToSelect);, the debugger goes directly to the VendorDDL.ascx, and I can see that the Model is properly populated with the new VendorsToSelect, and the item.VendorId and item.VendorName are showing the correct values. But when debugging is done, and the Create view is shown, the VendorDDL control is not showing the new data.
Any suggestions?
I think that the output of your controller is discarded because the view (Create) has the same Html.RenderPartial("VendorDDL", MeetingCalendar.Controllers.HomeController.VendorsToSelect) as during initial load.
If I understand your problem correctly (and admittedly, without looking at the controller I may not) - you need to pass the model dynamically. The simplest (but not the most efficient) way would be to have jquery call $.load("/Home/VendorDDL") that would populate with the whole model; and then on submit hijax the form and pass form data to the same controller action.
I'm trying to build a Editable GridView like control (Order column) with this code in the view:
<table>
<tr>
<th>
Name
</th>
<th>
Order
</th>
<th>
<img alt="Save order" src="<%= Url.Content("~/Content/minisave.png") %>" />
</th>
<th></th>
</tr>
<% foreach (var item in Model) { %>
<tr>
<td>
<%= Html.Encode(item.Name) %>
</td>
<td colspan="2">
<%= Html.TextBox("Order", item.Order, new { size = "3" }) %>
</td>
<td>
<%= Html.ActionLink("Edit", "Edit", new { id=item.id }) %> |
<%= Html.ActionLink("Details", "Details", new { id=item.id })%>
</td>
</tr>
<% } %>
</table>
The result table look like:
The questions are: How I receive this data in my controller? I need a form tag around the table? How I know which Order value belongs to which record?
A couple extra questions: If you see the code I add the size attribute to the input tab but when the browser renders it, the input is larger, how can I fix it?
Thanks for your help!
I've done this before. I did it by having the ID as part of the name, and a form around the entire table. That way the controller pulled all the data from all the rows and updated it all at once like a spreadsheet.
That works well for a unit of work, where you edit the page and save it, though of course you'd need to consider how to cope with your locking strategy, be it optimistic or pessimistic.
However, these days a better alternative might be to use ajax to submit specific values, somewhat like Google Spreadsheet, maybe?