Sources of ASMX Problems
Common ASMX Opening Problems
Microsoft Visual Studio is Not Installed
You encounter an error message such as "%%os%% Can't Open ASMX Files" when trying to open your ASMX. If so, it typically means that you don't have Microsoft Visual Studio installed for %%os%%. The typical path of opening your ASMX with a double-click won't work because %%os%% cannot make the program connection.
Tip: If you have another software that you know opens ASMX files, you can select it by hitting the "Show Apps" button.
Microsoft Visual Studio is Out-of-Date
It is possible that your version of Microsoft Visual Studio isn't able to open your ASP.NET Web Service File file due to incompatibility. Visit the Microsoft Corporation website to download (or purchase) the latest version of Microsoft Visual Studio. Most of the time your ASP.NET Web Service File file was created by a newer Microsoft Visual Studio than what you have installed.
Tip: If you right-click on your ASMX file, then select "Properties" (Windows) or "Get Info" (Mac), you can obtain hints about what version you need.
Regardless, most of the ASMX file opening problems relate to not having the right version of Microsoft Visual Studio installed.
More Causes of Problems Opening ASMXs
Assuming you have the right Microsoft Visual Studio version installed, other problems can prevent you from opening ASMX files. There can be other issues - unrelated to software - preventing you from opening ASMX files. Problems unrelated to software:
- ASMX file type Registry entries are wrong
- Deletion of the ASMX file description from the Registry by mistake
- Defective install of a ASMX program, such as Microsoft Visual Studio
- Your ASMX file is corrupted (issues with your ASP.NET Web Service File file itself)
- Your ASMX is infected with malware
- Device drivers of the hardware associated with your ASMX file are corrupt or out-of-date
- Too many applications are open on your PC to load your ASP.NET Web Service File file successfully
Quiz: Which of the following is not a MIME type?
That's Correct!
Spreadsheet MIME types do not begin with the "spreadsheet/" prefix, but instead start with the "application/" prefix. For example, an OpenDocument Spreadsheet: "application/vnd.oasis.opendocument.spreadsheet".
Close, but not quite...
Spreadsheet MIME types do not begin with the "spreadsheet/" prefix, but instead start with the "application/" prefix. For example, an OpenDocument Spreadsheet: "application/vnd.oasis.opendocument.spreadsheet".