How to fix a 'Microsoft.Office.Interop.Outlook Reference' error? - c#

Visual Studio (2015 Community) does not seem to be recognizing Microsoft.Office.Core or Microsoft.Office.Interop.Outlook as references. A yellow triangle is showing up to the left of both references and because of this and the Using directive 'using Microsoft.Office.Interop.Outlook;' is being flagged as unnecessary. Hence, I cannot call the MailItem class.
Any assistance would be appreciated!
(I'm a rookie, so I apologize if I'm stating something incorrectly)
I was initially using VS 2019 Community and was told that this could be the problem and that I should try VS 2015. I went to VS 2015 Community but the issue still exists.
My code:
using Microsoft.Office.Interop.Outlook;
using Outlook = Microsoft.Office.Interop.Outlook.Application;
-------------------
MailItem email = outlookApp.CreateItem(OlItemType.olMailItem);
When I attempt to build my code then receive the following errors:
CS0234 The type or namespace name 'Office' does not exist in the
namespace 'Microsoft' (are you missing an assembly reference?)
- I get this for each Using directive mentioned above
CS0246 The type or namespace name 'MailItem' could not be found (are
you missing a using directive or an assembly reference?)
CS0103 The name 'OlItemType' does not exist in the current context


I was able to find the solution for this. I did not have the proper Microsoft packages added to the solution. I opened NuGet (tools > NuGet Package Manager > Manage NuGet Packages for Solution...) and searched for the proper assemblies and then added them to the Solution.
This resolved the issue.


You can add this from right clicking add reference,
1. In Solution Explorer, right-click your project's name and then click Add Reference. The
Add Reference dialog box appears.
2. On the Assemblies page, select Microsoft.Office.Interop.Word in the Component Name list,
and then hold down the CTRL key and select Microsoft.Office.Interop.Excel. ...
3. Click OK.
I think it will works for you..

Related

Can you connect to a BotFramework bot in Unity using Directline?

I've created a reference in script to Universal.Microsoft.Bot.Connector.DirectLine in Visual Studio 2019 and everything looks fine but after I save and return to Unity, I get the following error:
error CS0246: The type or namespace name 'Universal' could not be found (are you missing a using directive or an assembly reference?)
I tried adding a reference to 'Universal' by Creating an Assembly Definition Reference asset, but did not see Universal on the list of references to add.
I'm wondering if what I'm trying to do is even possible in Unity.

You can find the package on Nuget, and grab the DLLs (and any DLLs it depends on) and put them into Assets/Plugins
https://www.nuget.org/packages/Microsoft.Bot.Connector/
if it has different folders/versions pick the Standard version

The type or namespace name 'Capture' does not exist in the namespace 'Windows.Graphics' (are you missing an assembly reference?)

I'm new to C# althought have experience with other programming languages.
I am trying to get this demo code to build:
https://github.com/MicrosoftDocs/SimpleRecorder
I've installed Visual Studio 2019 free edition plus I installed everything else I thought might possibly be needed such as the.NET framework.
One of the errors is as follows:
Severity Code Description Project File Line Suppression State
Error CS0234 The type or namespace name 'Capture' does not exist in the namespace 'Windows.Graphics' (are you missing an assembly reference?) CaptureEncoder C:\Users\andrewstuart\devel\screenrecorder\CaptureEncoder\CaptureFrameWait.cs 9 Active
But many other errors appear in the Visual Studio log when I try to build the project. Here's a screenshot:
Can anyone suggest what I might be doing wrong and how to get this project to build?
thanks

C# - Recompiling old code, running into errors (are you missing an assembly reference?)

First and foremost, I've never worked with C#, or any compiled language for that matter. So I'm hoping I'm just doing something wrong here.
We have an old in house app, written in c# that has some smtp settings hard coded that need to be changed. I have the source files, and even the .sln visual studio project file. So I open the project in vs, make the required changes, and go to build- however I'm running into errors (Build -> Build 'Autodocs' (the name of our app)):
Build started...
1>------ Rebuild All started: Project: AutoDocs, Configuration: Debug Any CPU ------
1>C:\shared\New folder\AutoDocs\Microsoft\Office\Interop\Word\Documents.cs(10,38,10,54): error CS0234: The type or namespace name 'CustomMarshalers' does not exist in the namespace 'System.Runtime.InteropServices' (are you missing an assembly reference?)
1>C:\shared\New folder\AutoDocs\AutoDocs\modules\DWStorer.cs(7,7,7,15): error CS0246: The type or namespace name 'DocuWare' could not be found (are you missing a using directive or an assembly reference?)
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========
So does anybody have any suggestions for a c# newbie like me? Anything I should have to do when copying a project dir from the server to my pc to build it?
Thank you in advance.

Do you know what kind of program it is? Windows? ASP.NET? MVC?
The errors are shown, but let's go through them:
1>C:\shared\New folder\AutoDocs\Microsoft\Office\Interop\Word\Documents.cs(10,38,10,54):
error CS0234: The type or namespace name 'CustomMarshalers' does not exist in the
namespace 'System.Runtime.InteropServices' (are you missing an assembly reference?)
First, look in this document:
C:\shared\New folder\AutoDocs\Microsoft\Office\Interop\Word\Documents.cs
Somewhere in that file, when viewing in Visual Studio, you will see the word CustomMarshalers, and it needs to be referenced.
So, in your project, you will need to right-click the References section and add that missing reference (if it isn't there already):
Also, at the top of your Documents.cs file, you need to have a line like this:
using System.Runtime.InteropServices;
See Microsoft's documentation here: System.Runtime.InteropServices.CustomMarshalers
Here is your second error:
>C:\shared\New folder\AutoDocs\AutoDocs\modules\DWStorer.cs(7,7,7,15):
error CS0246: The type or namespace name 'DocuWare' could not be found
(are you missing a using directive or an assembly reference?)
Similar to the first error, this one is having an error in the DWStorer.cs file because it cannot resolve the keyword DocuWare.
DocuWare is a third party tool that must be added to your references and added to the top of your DWStorer.cs file.
DocuWare
You may have to go to the link above to download their tool if you do not have it in your project somewhere.

CS0246: The type or namespace name 'MySql' could not be found

how i can fix this problem??
help me
Compiler Error Message: CS0246: The type or namespace name 'MySql' could not be found (are you missing a using directive or an assembly reference?)
Line 1: using MySql.Data.MySqlClient;

Apologies if this is not the case but working on the assumption that you're developing in a version of Visual Studio, check the project references.
If MySql.Data exists in the references but has the warning (yellow triangle) indicator next to it then you may need to re-reference the .dll from its location in your filesystem.
Alternatively, you can grab this from the Nuget package manager if it is not available locally.
Despite the full namespace qualification, the library must be correctly referenced for the object namespace to be recognised in the IDE.
Let us know what IDE you're using if not VS.

Getting namespace does not exist error for all the references added in my project

Whenever I take the latest code from TFS and tries to build existing solution, It fails all the project building and says that : The type or namespace name 'XYZ' does not exist in the sampace 'a.b.c' (are you missing an assembly reference?)
This is happening with all the references and only in my system. On the other systems all these code works fine.
Can it be a Visual Studio issue or some setting which might have got changed?

Categories