I am getting a compilation error on a website. There is a repeater declared in the aspx file as follows:
<%# Page Language="C#" AutoEventWireup="true" CodeFile="MyPage.aspx.cs"
Inherits="MyClass" %>
<asp:Repeater ID="rptMyRepeater" runat="server">
<ItemTemplate>
<tr>
<td>
…
And the class is defined as follows:
public partial class MyClass : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
rptMyRepeater.DataSource = GetMyDataSource();
rptMyRepeater.DataBind();
}
}
}
The problem I have is that rptMyRepeater is not recognised. Note that I copied these files in from another project, and so don't have a designer.cs file.
I came across this question which implies a "Convert to Web Application" would fix the problem. As I'm referencing a CodeFile rather than a CodeBehind, does this apply, or is there a better way? Is a designer file even necessary in this case?
If what you are saying is you don't have just the contents of designer.cs, add this to designer.cs:
protected global::System.Web.UI.WebControls.Repeater rptMyRepeater;
If you do not have a designer.cs file at all, add it to aspx.cs -i.e codefile- and it should work.
Simply this is the equivalent of what the designer file supposed to be doing, controls are not much different than class variables as I see.
A couple of things you could check:
Ensure that your .cs file is set to Compile in the properties
Try using CodeBehind instead of CodeFile
If your page class is inside a namespace then ensure it is fully qualified in the aspx file
If you are using a Web Application Project then right-click and Convert to Web Application
Related
I'm doing a side project where I've just loaded the existing code. These things always require some jiggering of references and nuGet packages, and I've resolved most of these issues, but there's one that's bedeviling me that I haven't sorted out.
It's a standard webforms project, and I'm getting the error: "'new_client_aspx' does not contain a definition for 'imgEdit_Click' and no extension method 'imgEdit_Click' accepting a first argument of type 'new_client_aspx' could be found (are you missing a using directive or an assembly reference?)"
The declaration in mark-up is:
<asp:ImageButton ID="imgEdit" ImageUrl="~/images/file_edit.png"
CommandName="Edit" runat="server" Width="30px" OnClick="imgEdit_Click" />
The code-behind handler is currently naked, but is:
protected void imgEdit_Click(object sender, ImageClickEventArgs e)
{
//Code here for editing.
}
I've opened the project in VS2013 Premier and VS2017 Community edition, and both throw the same error. Any ideas for fixing this? Thanks in advance.
edit: I just noticed this account has my old work email. Apparently changing the email is a somewhat labyrinthine process. Anyway, don't email me there, if you were otherwise inclined
The issue You described can be caused by several different things missing in the code:
It appears when there is no method defined in the page's code-behind file or the method is defined as private (explicitly or by not using any accessor). However, according to the description, You already have the method, so it's rather not the case.
The same error can also appear when code-behind class is not correctly bound to the markup (*.aspx) file. Your markup file should begin with a line looking similar to this one:
<%# Page Title="My page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="NewClient.aspx.cs" Inherits="WebApplication.NewClient" %>
Take a look at Inherits attribute. Make sure it correctly points to Your code-behind class (in my example, NewClient is a class name and WebApplication is a namespace where it's located).
The ....aspx.designer.cs file may be corrupted. Try to comment out the handler, remove it from the markup and then let Visual Studio to create new handler by itself, as described in this answer: 'ASP.business_aspx' does not contain a definition for 'submitSearchClick' and no extension method 'submitSearchClick'
Please let me know if this solves Your issue.
I have Website project, which contains some .ascx and .aspx files. I have added new element <asp:TextBox ID="tb1" runat="server" ... /> in .ascx file and I have wrote some code in proper .ascx.cs file using this element: tb1.Text = "SomeText";. When I compile this project I recieve following error: The name 'tb1' does not exist in the current context.
How can I force to refresh markup of .ascx page? I use Website project and I cannot to change its type to Webapplication.
UPD: I have Website project, which has NOT .ascx.designers.cs files. And I cannot change type of my project to web application.
Unless there's something else happening here, it sounds like the designer.cs file might be out of sync. Try cutting and pasting the control back into the markup, or go into the designer file for the user control and add the TextBox manually:
protected global::System.Web.UI.WebControls.TextBox tb1;
It seems like your design file is not connecting with your code behind file.
Can you confirm if you are defining it as follows,
<%# Control Language="C#" AutoEventWireup="true" CodeBehind="yourcontrol.ascx.cs" Inherits="CompleteNameSpace.ClassName" %>
I just inherited a web site that was created by a designer. The site was originally created with all *.html files. The designer renamed all the *.html files to *.aspx files. Hence there are no aspx.cs files created. I pulled the site into a new VS2012 solution. My question is, is there a way in VS 2010 to automatically create the code behind files for a an existing stand alone aspx file?
I don't know of an automated way to do this, but if there is no server side code in the existing *.aspx files then it should just be a case of adding the .cs codebehind files and then wiring them up in the <%# Page tag like so:
<%# Page Title="YourPageTitle" Language="C#" AutoEventWireup="true" CodeBehind="YourPage.aspx.cs" Inherits="YourNamespace.YourPage" %>
Note: This will not create the YourPage.aspx.designer.cs file. (I usually delete these anyway as they cause merge issues - i find it easier to add the controls i need to reference to my code-behind file manually.)
The other alternative is to just create a new "Web Form" for each page with the correct names and then copy and paste the existing markup into them. If you do have server code in the existing *.aspx files then you will need to manually copy it to the code-behind.
Based on what I found here: http://forums.asp.net/t/1229894.aspx/1
Right click on your solution explorer.
Add New Item -> Class File.
Name the file as the name of your aspx eg: Default.aspx.cs
When it asks you the file should be in app_code click "no".
In your aspx in page attribute add
AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default"
Similarly in your class file that you just added remove everything. Your class should look like this:
//all namespaces go here
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
}
After you add the new .cs file, you may want to see the file look like a codebehind file (indented, icon, etc). To do so:
Unload the project
Edit the project
Find the new filename (file.aspx.cs) in the section with files.
Add an xml node for DependentUpon.
Save and Close the project
Reload the project
For a file Profile.aspx.cs, the xml should look something like this:
<Compile Include="Profile.aspx.cs">
<DependentUpon>Profile.aspx</DependentUpon>
<SubType>ASPXCodeBehind</SubType>
</Compile>
In Visual Studio 2012: Right click on the project --> click Add --> click Web Form --> Copy the content of your original aspx file into the new WebForm aspx --> delete the original aspx file --> Rename the new one to anything you want.
Now you should have a new aspx file with a code behind file that is ready for use
To save yourself from the drama of manually editing the project file like David Frette details, I suggest you remove the file from the project and create a new file with the same name with a code-behind. Then copy-paste the contents of the original aspx or ascx to the new files.
I'm very new to ASP.net, and I had to fix a issue in and ascx file (It was just an html fix). When I got ready to put the code back into the repository I checked the changes in the Designer.cs file. They don't seem to match up with the changes in the ascx file.
Ultimately where do I see the errors for designer files? Will I see them when I build? When I view the page?
Thanks.
That's an interesting question with multiple scenarios. Assuming in your markup you have <asp:Label ID="Label2" but in Designer.cs you have protected global::System.Web.UI.WebControls.Label Label1;:
Scenario #1
You do not access Label1 or Label2 anywhere else.
No errors will happen.
Scenario #2
You set Label1.Text = "Test" in the code-behind file, or you set some control attribute to Label1 (such as
You get a runtime exception.
Scenario #3
You set Label2.Text = "Test" in the code-behind file.
You get a build error.
I have the following line in my master page:
<td valign=top runat="server" id="navBar">
And then in the master page code behind we reference it and do something with it:
public void HideNavbar()
{
navBar.Visible = false;
tdMain.Attributes["class"] = "MainWrapper";
}
But for some reason when we copied this master page from a Web Site Project to a WAP project, it doesn't know what navBar is. It's not referencable in code-behind anymore.
Does the designer file need an entry for this? And what would that possibly be if I have an id in a ?
Another thing you could try is to delete the designer file, then right click on your master page and click on "Convert to Web Application." That will force a re-gen of the designer file, and pick up the new controls that have gotten out of sync with the designer file.
This specific issue is on my list of top reasons that I don't like Web Application Projects.
The move to a WAP may have messed up the class for your master page.
Try adding a protected control decleration within your master page. In VB this is:
Protected WithEvents navBar as HtmlTableCell
I'm not totally sure this is correct, but it would be my first guess.