There's quite a few different ways to set Date Formats in C#.

How to format dates in ASP.NET?

Have you ever been struggling, to make your ASP.NET MVC views format your properties of type datetime correctly? I have. And I’ve been shot in the leg by weird hacks made by both me (just 6 months earlier) or someone else. So I thought I’d finally document the different ways one can set up the formatting of datetime fields in ASP.NET MVC projects. Or at least all the ways I’ve found so far! :) While this guide has been written for ASP.NET MVC, most of…Continue reading How to format dates in ASP.NET?

SharePoint is not broken - it just does't work

How to fix “The web site does not support SharePoint Online credentials. The response status code is ‘Unauthorized'”

While running some SharePoint Online -PowerShell commandlets, or connecting to a SharePoint Online site from your app, you get a following (or similar) error about your SharePoint Online credentials being unauthorized for something you should definitely be authorized to do: Cannot contact web site ‘https://[tenant]-admin.sharepoint.com/’ or the web site does not support SharePoint Online credentials. The response status code is ‘Unauthorized’. And that’s not all – by digging into the full error message, you find the underlying internal error: MSDAVEXT_Error=917656; Access+denied.+Before+opening+files+in+this+location%2c+you+must+first+browse+to+the+web+site+and+select+the+option+to+login+automatically. What awakens my curiosity,…Continue reading How to fix “The web site does not support SharePoint Online credentials. The response status code is ‘Unauthorized’”

Call to sites Graph API requires “owner” permissions for site collection regardless of app permissions

Okay – yet another weird issue, and a hacky workaround. I was developing an app that was calling a SharePoint site through Graph API, using jQuery $.ajax call (developed in TypeScript), and ran into surprising 401 errors. I did find a workaround, but am also working on an actual fix. Description To get SharePoint site ID, which is needed when accessing SharePoint lists, the calls seemed to fail for my test accounts. Everything was working fine for my developer account, which was a global admin,…Continue reading Call to sites Graph API requires “owner” permissions for site collection regardless of app permissions

Azure AD Login error

4 ways to fix error AADSTS65001 (The user or administrator has not consented to use the application)

Have you run into error AADSTS65001 with your application, that tries to authenticate against Azure AD? I sure have – seems to happen at least every other time when I’m building something that uses AAD to authenticate against SharePoint. Fixing issues with Azure AD authentication for Enterprise applications can be tricky. But a lot of the time, this is just another Azure Active Directory error that we can fix easily. This article contains multiple different solutions to the issue, where granting admin consent has somehow…Continue reading 4 ways to fix error AADSTS65001 (The user or administrator has not consented to use the application)

"For security reasons DTD is prohibited in this XML document. To enable DTD processing set the ProhibitDtd property on XmlReaderSettings to false and pass the settings into XmlReader.Create method."

Fixing the “For security reasons DTD is prohibited in this XML document.” issue

This post describes a couple of ways to fix the issue “For security reasons DTD is prohibited in this XML document”. At least for me, it appeared when trying to access SharePoint Online using Powershell or a console program using OfficeDev.PnP (which in turn uses CSOM). Error When running any piece of code, whether in PowerShell, .exe console or anything else than in the code behind relies on .NET Framework, you get an error like this: For security reasons DTD is prohibited in this XML document.…Continue reading Fixing the “For security reasons DTD is prohibited in this XML document.” issue

Fixing Lenovo T460S Wifi connectivity issues (removing the evil versions of Intel Dual Bank Wireless-AC 8260 driver)

I recently received a new work laptop – Lenovo T460S. A cute little thing with impressive performance and reasonably good battery life. However, what people frequently complaing about online in regards of this laptop, is its absolutely, horribly awful wifi. This, in turn, is probably caused by it’s bad wifi chip, Intel Dual Bank Wireless-AC 8260. And they’re right – it’s a load of crap. Posts Related to “Fixing Lenovo T460S Wifi connectivity issues (removing the evil versions of Intel Dual Bank Wireless-AC 8260 driver)”:The…Continue reading Fixing Lenovo T460S Wifi connectivity issues (removing the evil versions of Intel Dual Bank Wireless-AC 8260 driver)

Typescript & React.JS

Fixed: Cannot use JSX unless the ‘–jsx’ flag is provided

This blog post is about fixing issues related to building a project with TypeScript files. Basically, if your jsx or tsx -files are not getting built to js-files (which is what the browser understands) in Visual Studio’s build, this post might solve the issue for you. Description While converting a project using React.js to TypeScript (and, hence, to use .ts and .tsx files instead of .js and .jsx) I stumbled upon this error: Cannot use JSX unless the ‘–jsx’ flag is provided The project would…Continue reading Fixed: Cannot use JSX unless the ‘–jsx’ flag is provided

Duplicate String values

Duplicate object values in ASP.NET MVC Display Templates? Easy fix!

Are you getting duplicate object values (or whatever those Objects output in .ToString())? Eh, so was I, after I edited the display template for String. Found a fix, though. Description Okay – I just ran into one of my more stupid mistakes since.. Well, since forever. I had made some quick and simple edits in String.cshtml display template (among quite a few other edits before building again and seeing what happened), as I added support for Enum values there. After that I started getting duplicate…Continue reading Duplicate object values in ASP.NET MVC Display Templates? Easy fix!

Powershell: languagepack 0

Powershell Error: Cannot uninstall the LanguagePack 0 because it is not deployed.

Have you ever run into this, very non-descriptive and weird SharePoint error message “Cannot uninstall the LanguagePack 0 because it is not deployed”? You could encounter it while running some PowerShell scripts – most typically, when trying to update a wsp solution. I have, and luckily often easily solved! Symptoms Assume you’re trying to install, update or uninstall a SharePoint solution (.wsp package) using PowerShell-commands Install-SPSolution, Update-SPSolution or Uninstall-SPSolution (respectively). Operation fails with the following (or similar) error: Error: Cannot uninstall the LanguagePack 0 because it…Continue reading Powershell Error: Cannot uninstall the LanguagePack 0 because it is not deployed.

Malformed web.config causing a Parser Error

“Server Error in ‘/’ Application” or “Parser Error” – it’s actually a malformed web.config killing your ASP.NET-application or SharePoint

This post describes how to resolve a kind of cryptic and oddly misdescriptive error message about Parser Error on your ASP.NET application or (an On-Premises) SharePoint site. I ran into this after deploying wsp-packages to a SharePoint farm, but you can apparently get this on ASP.NET MVC sites, too. The error doesn’t actually tell you what’s wrong, so figuring it out took a while. Hopefully it’ll help you, though! Symptoms: Parser Error from a random-looking location Once you navigate to your web- or SharePoint site, you only…Continue reading “Server Error in ‘/’ Application” or “Parser Error” – it’s actually a malformed web.config killing your ASP.NET-application or SharePoint

IE11 compatibility view emulator

Identifying IE11 compatibility mode in SharePoint

In this post, I describe how you can figure out if IE11 (Internet Explorer 11) has jumped in the compatibility mode. You run into this requirement every now and then, when trying to figure out some SharePoint browser compatibility mess-up. This is quite frequent, because in compatibility mode IE does its best to screw up your CSS. Compatibility view now and before Microsoft has been pretty keen on introducing new ways to handle browser compatibility and make IE behave in even stranger ways that it…Continue reading Identifying IE11 compatibility mode in SharePoint

File not found

“File not found”-error when trying to activate custom feature on SharePoint

This post is about fixing on of the most non-spesific errors you can get when activating features on SharePoint “File not found”. Problem “File not found” is one of the more annoying errors one can stumble upon when trying to activate a feature. There are quite a few reasons that can cause this error, but after the obvious ones (some files failing to be included in the package, botched wsp deployment, errorenous urls in event receiver) one thing to check might be the alternate access mappings.…Continue reading “File not found”-error when trying to activate custom feature on SharePoint

Troubleshooting guide for Windows hosts -file

This post describes how to fix possible issues with Windows hosts-file. I’ll first document how to find the damn file, and then go through a bunch of options on what to check and how to fix different possible issues. Opening the hosts -file First of all, hosts file location is usually: C:\Windows\System32\drivers\etc\hosts (link may or may not work depending on your security settings and browser version, but you can always copy-paste it to your text editor’s “Open”-dialog… :) Editing the file requires elevated privileges for…Continue reading Troubleshooting guide for Windows hosts -file