I need to migrate my website which was earlier in target framework 3.5.
Now i need to convert it into 4.5, Please tell me that best approach to do it.....
I have tried with visual studio 2012 'Build' option to change it to 4.5.
But i am getting lots of script resource error mainly in js file, although these all works fine in 3.5.
After changing it to 4.5 , I m getting so many java script errors.
So, i am missing something.
Need to discuss these errors with you, so currently i am not including any error with you.
Please help me for the the right approach for this.
Any kind of help will be highly appreciated.
Thanks in advance.
You may have problems with some of the HTML elements you have marked as runat="server", specially iFrames.
So, if you a line of code (in you code-in-front) that looks like
<iframe id="myServerSideIframe" runat="server" src=""></iframe>
you are going to have problems loading them.
The reason is that the type of the corresponding variable in your code-behind for most of the HTML elements is "System.Web.UI.HtmlControls.HtmlGenericControl". However, in .Net 4.5, there are specific types for each HTML element, e.g. System.Web.UI.HtmlControls.HtmlIframe.
In order to resolve this, one easy way is changing the Id of that element in code-in-front, and changing it back to the original Id. That way, the designer will automatically update the variable declarations in the designer file.
Had converted web app from 3.5 to 4.0 (and then to 4.5)
When you open your app in VS2012, it will offer to migrate it to .NET 4.5.
Let it do the migration; most of the changes are in the web.config.
Refer to http://www.asp.net/whitepapers/aspnet4 and http://www.asp.net/vnext/overview/aspnet/whats-new for an overview of potential "breaking changes"
You may have javascript problems with ClientID; ClientIDMode=AutoID or static may help.
If you are using 3rd party .NET assemblies, some of them may not work properly.
You will have to check with the assembly author for new updates.
Good luck on the migration.
Related
I created a new .NET 6 Blazor Server-side project and made a couple of changes. I have a couple of files using CSS isolation (like Contact.razor + Contact.razor.css).. In the _Layout.cshtml page the template added the following:
<link href="CustomerPortal.styles.css" rel="stylesheet" />
Where CustomerPortal is my Project Name. I can see the file is generated correctly under "CustomerPortal\CustomerPortal\obj\Debug\net6.0\scopedcss\projectbundle\CustomerPortal.bundle.scp.css" and "C:\Data\Git\WebApps\CustomerPortal\CustomerPortal\obj\Debug\net6.0\scopedcss\bundle\CustomerPortal.styles.css"
BUT when I run the project, both with Kernel or IIS Express, I get a 404 not found for the CSS, if I try to manually navigate to the CSS I also can't find it. Any ideas? My csproj doesn't have any flags that would affect it.
Edit:
There is a new extension as part of the minimal setup in .NET 7, and backported to newer versions of .NET 6 as well.
Both in .NET 7 and .NET 6 you can now do:
builder.WebHost.UseStaticWebAssets();
Old answer:
You've got a couple options here to resolve this depending on the approach you want to take. I think we've figured out why it's happening, but UseStaticWebAssets() seems to not be supported for the new minimal startup code. So, here's your options I can think of off the top of my head.
Migrate your code back to the "old" way of doing application startup. This is still a supported and completely valid approach as there's edge cases that aren't supported (like this one).
Pass a new WebApplicationOptions to the CreateBuilder() method and, depending on environment, look for the static files in a separate (and correct) location. See some examples here.
With the existing builder, check the environment and use the StaticWebAssetsLoader to load static web assets.
A complete example of #3
if (builder.Environment.IsEnvironment("Local"))
{
StaticWebAssetsLoader.UseStaticWebAssets(builder.Environment, builder.Configuration);
}
That being said - I'd imagine they'll plug this hole eventually and provide parity for UseStaticWebAssets(). You can see the progress of this effort in this open GitHub issue.
For anyone else...
I had the exact same issue with a .net 6 blazor server app. For me it came down to the fact that I had changed the project name but the reference to {project}.styles.css in _Layout.cshtml was still pointing to the old project name.
Simply updating {project} here to the correct project name fixed my issue.
When I encountered this error, it was because I'd named my MVC project with a hyphen: htmx-spike.
When I generated the project from a template (dotnet new mvc -o htmx-spike), the tooling renamed the namespace to htmx_spike—with an underscore instead of a hyphen, because hyphens aren't allowed in C# identifiers—and used that modified name as the CSS filename in _Layout.cshtml.
However, it turns out that in this case the CSS location actually still corresponds with the project name, with the hyphen. So the auto-generated code is incorrect, and was causing the 404 to be returned:
Once I renamed the file in the link element to the correct name with the hyphen, everything was fine.
I had the same issue with a component I imported from another project. I solved it by closing all instances of Visual Studio, deleting the hidden folder [.vs] from the project folder, and then restarting the project in Visual Studio. On restart, Visual Studio recreated that folder and imported CSS file(s) were included.
Yes, I know, this is the n'th question around this issue. I tried a lot of mentioned ~solutions, but none of them worked for me.
Windows 8.1, Visual Studio 2012, .NET 4.5.51641, Entity Framework 6.1.1
My struggle is to configure a well structured ASP.NET project, separate the different entities. I need more entities and in separate folders because of some overlaps among generated class names.
Therefore I've created a DAL folder and the first one, the Production. My model is quite simple, during the mode creation I've created the ProductionEntities entity connection string as it seems bellow:
Here is the ProductionModel.edmx and its properties:
I checked the assembly with reflector, all the resources are correct:
After that I've created a webpage and an EntityDataSource within it. If I select the ProductionEntities for Named Connection, I get above mentioned error message.
Have anybody some fresh idea for this? Thanks in advance!
I've got the solution!
After creating the entity model, it is MANDATORY to compile the project! After compilation the VS is going to recognize the entitydatasource wizard works fine...
My question is similar to here: ASP.NET System.Anything is not defined
I am in the process of converting a website project to an MVC 4 project. To do this, I created a new MVC project and imported all of my content from the previous website. Both projects are in VB, and I'm using Visual Studio 2010 SP1, with both the MVC 4 update and TFS 2012 update applied.
I now have errors popping up when I build the MVC project. Things like "Type 'System.Web.UI.Webcontrol' is not defined." When I hover over the error, two of the prompts I get to fix it are
1) Change 'System.Web.UI.WebControl' to 'Global.System.Web.UI.WebControl'
2) Change 'System.Web.UI.WebControl' to 'WebControl'
Both of these seem to fix it, but does anyone know why I can't use "System.Web.UI.WebControl" to refer to this class? I'd rather not change all of my code... there are 100s of thousands lines in there.
Update: Outside of the System and System.Web.UI namespaces, I can also drop the 'System.'. So 'System.Drawing.Color' would become 'Drawing.Color'.
There exists another namespace containing System in your solution somewhere (e.g. Abc.System.def) - probably in a referenced library. After the conversion, the project file probably imported the prefix to System in said namespace (e.g. Abc), so when you type in System, it resolves to Abc.System.
I posted this question before I had whittled down as much of the compile errors as possible.
It appears that after I had removed all the System. references from the previous App_Code classes, the real errors started appearing. There were all sorts of messages about aspx controls not existing.
Ultimately, it seemed that I needed to right-click on the .aspx pages from my website project and choose 'Convert to Web Application.' This generated a .aspx.designer.vb file with the asp.net control declarations in yet another partial class.
After doing that for all pages, I am now able to use System. throughout the app.
To others who've asked, this System. error was only affecting the non-page code. .aspx, .aspx.vb, .ascx, .ascx.vb, .ashx, etc., files were not affected.
This does make some sense, anyhow, as I had previously pulled in all the App_Code libraries prior to pulling in the pages, and the site compiled. After importing the pages and their code behinds, the order of the errors was just odd. But I stuck with it and found the underlying cause.
Thanks for the willingness to help. If you have any other questions, I'd be glad to respond.
I have a weird issue. I have a VS 2010 .Net 4.0 Web Site (not web app) that runs on IIS 7.5.
When I build the site, I'm getting errors like the one in the title. Normally, this would be straightforward to fix - just add a reference.
In this case, I already have a reference to System.Core.Dll (4.0). I have "using System.Linq" declared.
If I fully quality my references to IQueryable (e.g. System.Linq.Iqueryable), autocomplete resolves it perfectly.
All my folders are read/write enabled.
I'm not sure what else to check.
Maybe one of my fellow Overflowers can help? :-)
TIA!
Ensure that the Target Framework is set to ".Net Framework 4" in the property pages
I found the error...it seems that there was an error in an upstream web.config that was causing my build to fail. I wish I knew why the symptoms manifested the way they did, but I'm building now. :-)
Thanks to all who answered and tried to help.
I am trying to create url routing like this
http://msdn.microsoft.com/en-us/magazine/dd347546.aspx
but I am having few questions , first why he is adding lines to the web.config , I tested it and it didnt appear that they're doing something as I commented them and nothing major appeared
second I am having this line of code that is crashing
var display = BuildManager.CreateInstanceFromVirtualPath(_virtualPath,typeof(Page)) as IProfileHandler;
when casted as ihttphandler it's working , but when I am casting it to iprofilehandler(which is implemeting ihttphandler) it's giving null !
This article is quite old as it's written before ASP.NET 4.0 was released.
Routing is now a core component of ASP.NET 4.
See this one instead:
http://weblogs.asp.net/scottgu/archive/2009/10/13/url-routing-with-asp-net-4-web-forms-vs-2010-and-net-4-0-series.aspx
These are really two questions here:
Why he is adding lines to the web.config - Web Configuration in .NET 4.0 applications has been greatly streamlined. A lot of the configuration that was done per-application is now included in the lower level web configuration (machine wide) (read). This means you don't need to add that configuration data in, its already done for you.
You're issue with BuildManager returning null. We'd need to see a little more code than that.