FileStream - "The given path's format is not supported"

Question

I'm trying to use EPPlus to save a spreadsheet on our LAN. I'm using a `FileStream` object to do this, however whenever I attempt to instantiate the object I get the error `The given path's format is not supported` C# ``` private static string _fileName = "ErroredRows_"; private static string _results = @"\prdhilfs03\l&i-sales&mkt\WORKAREA\Agencyservices\Shared\AIC\Analysts_and_Reporting\Realignments\2014\MassUpdateTesting\Results"; public static void WriteSpreadsheet(Dictionary<DataRow, string> errors) { //Create download Destination string filePath = System.IO.Path.Combine(_results, _fileName + DateTime.Now.ToString("yyyy-MM-dd_HH:mm:ss") + ".xlsx"); FileStream newFile = new FileStream(filePath, FileMode.Create, FileAccess.Write); //Construct new Excel package ExcelPackage pck = new ExcelPackage(newFile); //Instantiate workbook object var ws = pck.Workbook.Worksheets.Add("Query1"); ``` Here's the contents of the `filePath` `string` variable. ``` \\prdhilfs03\l&i-sales&mkt\WORK…

Accepted Answer

You can't have `:` in your filename or path.

What i would do if i were you is this:

```
DateTime.Now.Ticks.ToString()
```

instead of

```
DateTime.Now.ToString("yyyy-MM-dd_HH:mm:ss")
```

Anyway, you can keep your own logic but you have to remove `:` (instead use `-` or `_` for example)

FileStream - "The given path's format is not supported"

Solution

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