问题
I migrated our project from .NET Framework to .NET Core 3.0 (C#, WPF) and now I can not use Microsoft.Office.Interop.Outlook anymore, because it is not compatible with .NET Core 3.0. What I want to archive is opening/sending prefilled Outlook-Mails.
Is there an alternative to this interop dll, or maybe a way to use .NET Framework for only this reference?
Thanks and best regards!
Microsoft.Office.Interop.Outlook, NetOffice.Outlook
回答1:
This worked for me:
- Right click Dependencies and click "Add Reference"
- Select Microsoft Outlook 16.0 Object Library under the COM tab.
- Under Dependencies/COM in your project, select Interop.Microsoft.Office.Interop.Outlook reference, then under "Properties" set "Embed Interop Types" to "Yes"
- I also had to uninstall the Microsoft.Office.Interop.Outlook NuGet package because it caused a conflict with the reference in Dependencies/COM.
Outlook automation is now working fine.
回答2:
I am having the same issue when trying to use Microsoft.Office.Interop.Excel 15.0.4795.1000. It won't run when I target .net core 3.00 preview 7.
At this stage I do not think there is any other option than reverting back to .NEW Core 2.2.
回答3:
I had the same problem while migrating components with Office interop for Excel and Outlook to .NET Core 3.0. I found out that this is only a problem of the Nuget packages Microsoft.Office.Interop.Outlook and Microsoft.Office.Interop.Excel. The packages probably need an update to work with 3.0?
If I make direct references to the Interop assemblies all is working well. Here is a link to an example for this.
If you use Visual Studio, you need an additional workaround to achieve this. From the linked sample:
Adding COM references to .NET Core projects from Visual Studio is not currently supported. The workaround is to create a .NET Framework project, add the COM references, and then copy the relevant COMReference elements in the project.
回答4:
This is possible in a roundabout way. Here is how:
- Create a temporary .NET framework project.
- Add the references to COM components (Microsoft.Outlook.Interop).
- Open that csproj file and copy the entire those components are located in, over to your .NET Core project.
The nuget packages seem to be incompatible at the moment.
Reference: DotNet Samples
来源：https://stackoverflow.com/questions/56442139/outlook-interop-in-net-core-3-0