How to pull file name from solution explorer? - In blazor server app/c sharp

Megan Paterson 1

I am creating an application which allows users to download pdf's which will be stored within the solution explorer - this works fine but is there any way of me pulling info from the file? - file name, folder name etc.

The code im using to download the file is as below if this helps.

the below code is in the @Aidan Wick section of my .razor file

async Task DownloadBinary()
{

FileStream fs = new FileStream("C://Development//CsharpApplications//AlbertBartletPortal//AlbertBartletPortal//PDFs//P45.pdf", FileMode.Open, FileAccess.Read);  
    byte[] pdfData = new byte[fs.Length];  
    fs.Read(pdfData, 0, Convert.ToInt32(fs.Length));  
    fs.Close();  
    // Send the data to JS to actually download the file  
    try  
    {  
        await JSRuntime.InvokeVoidAsync("BlazorDownloadFile", "P45.pdf", "application/octet-stream", pdfData);  
    }  
    catch(Exception ex)  
    {  
          
    }  

}

this code displays a white card with a download image and if the user clicks it downloads the file and the following code is within the .razor file as well

<h1 class="text-center text-white pt-5">Purchase Order's</h1>  
    <div class="card-deck">  
    <div class="card" @onclick="DownloadBinary" style="color:white; width: 200px; height: 150px">  
        @*<img class="img-thumbnail" src="@item.ImageURL">*@  
        <div class="card-body">  
            <h5 class="card-title mb-3">  
                @*@item.Name*@  
                <p style="color: black"> Megan Paterson - p45</p>  
            </h5>  
            <p class="card-text">  
                @*<b>@item.Price.ToString("C")</b>*@  
            </p>  
            <center><img src="Images/img.png" width="40px" height="40px" /></center>  
        </div>  
    </div>

Once this is working, I will be pulling the foldername and using this to filter out the data.

AgaveJoe 26,201 Reputation points

2022-09-12T11:10:26.903+00:00

Your design will not work in a web application. You need to build a desktop application or mobile application.
Megan Paterson 1 Reputation point

2022-09-12T11:50:09.05+00:00

It already does work, I was just looking to pull the filename, would I maybe be better storing the info on an azure db or something along those lines? Maybe in an SQL server 2019 FileTable?

I've attached an image, what happens is if you click the white box it starts a download.
Karen Payne MVP 35,036 Reputation points

2022-09-12T12:32:36.187+00:00

Please learn to format your code
AgaveJoe 26,201 Reputation points

2022-09-12T14:07:59.213+00:00

How to pull file name from solution explorer?

I'm a little confused, the source code clearly reads from the C drive. The code will certainly stop functioning as expected once deployed to a web server. If you are using the static file handler then files can exist in the wwwroot but wwwroot is not a secured location by default. If security is not an issue then move the files to wwwroot.

Static files in ASP.NET Core

I was just looking to pull the filename

Pull file names how? I assume the files are secured by the user's identity. For example, you don't want Jon Adams to see Megan Paterson's documents, correct? Can you explain how your security works? If you simply want to read files in a directory then see the System.IO namespace.

Directory.GetFiles Method

would I maybe be better storing the info on an azure db or something along those lines? Maybe in an SQL server 2019 FileTable?

Files storage is location up to you and depends on hosting and application requirements. A blanket statement of using Azure db, a FileTable, or something is not specific enough. I assume the database design must relate users and files? Also, a file table is useful in desktop applications or a situation where a user is able to copy/move/delete files using the file system. This is usually not the case in a web app.
Megan Paterson 1 Reputation point

2022-09-12T14:23:05.603+00:00

sorry its my first time using this
Karen Payne MVP 35,036 Reputation points

2022-09-12T14:30:35.603+00:00

No problem but please edit your post and place code into code blocks. Personally speaking, I see unformatted code I stop there, exit the post.
Megan Paterson 1 Reputation point

2022-09-12T15:11:54.32+00:00

Okay thank you for your advice.
Qing Guo - MSFT 886 Reputation points Microsoft Vendor

2022-09-15T09:50:43.963+00:00

Hi @Megan Paterson ,

this works fine but is there any way of me pulling info from the file? - file name, folder name etc.
The code im using to download the file is as below if this helps.
FileStream fs = new FileStream("C://Development//CsharpApplications//AlbertBartletPortal//AlbertBartletPortal//PDFs//P45.pdf", FileMode.Open, FileAccess.Read);

Do you want to get the file name, folder name etc after FileStream fs = new FileStream("C://Development//CsharpApplications//AlbertBartletPortal//AlbertBartletPortal//PDFs//P45.pdf", FileMode.Open, FileAccess.Read); ?
If so, you can intercept the file name, folder name from the string "C://Development//CsharpApplications//AlbertBartletPortal//AlbertBartletPortal//PDFs//P45.pdf" .