By registering with us, you'll be able to discuss, share and private message with other members of our community.

SignUp Now!
  • Guest, before posting your code please take these rules into consideration:
    • It is required to use our BBCode feature to display your code. While within the editor click < / > or >_ and place your code within the BB Code prompt. This helps others with finding a solution by making it easier to read and easier to copy.
    • You can also use markdown to share your code. When using markdown your code will be automatically converted to BBCode. For help with markdown check out the markdown guide.
    • Don't share a wall of code. All we want is the problem area, the code related to your issue.

    To learn more about how to use our BBCode feature, please click here.

    Thank you, Code Forum.

C# excel extension error


New Coder
I have a code similar to this below

using(webclient wc = new WebClient())
string fileinfoname = "test_one";
string pathinfo = @"C:\testfolderinfo" + fileinfoname + ".xlsx";

wc.downloadFile("www.testurl.com/report", pathinfo);


I am currently experiencing a situation where the file is being downloaded but when I try to utilize excel to open the file, it gives the message

"Excel cannot open the file test_one because the file format or file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file"

This just started happening, hence how do i get an actual excel extension for excel 2007 and above to replace it above.

Thanks in advance
string fileinfoname = "test_one";
string pathinfo = @"C:\testfolderinfo" + fileinfoname + ".xlsx";
These commands construct the filename C:\testfolderinfotest_one.xlsx
I would assume you intended this to be C:\testfolderinfo\test_one.xlsx
Perhaps if you correct that first it will work better.

New Threads

Latest posts

Buy us a coffee!

Top Bottom