Check file exists or not using c#

Question

I stored a file path in database table like this ../Document/5292013/cal.png. Now I want to check whether or not the file exists in the server folder. I am using the below code to check this, but it's not working for me.

 if (File.Exists(Server.MapPath(root.GetElementsByTagName("FLD_DOC_ID")[0].InnerText)))
 {
     proof.HRef = Server.MapPath(root.GetElementsByTagName("FLD_DOC_ID")[0].InnerText);
 }

Now I check using watch File.Exists(Server.MapPath("Document")) //Returns false, but server having the same folder.

Please help me to solve this.

What do you mean by not working? Are you getting an error? Are you not finding the file? — Esteban Araya
– Esteban Araya, Commented May 29, 2013 at 4:50
For map path to work correctly, you should start your path with ~ — Mat J
– Mat J, Commented May 29, 2013 at 5:02

Igor · Accepted Answer · 2013-05-29 05:08:27Z

4

You need to transform the file name to a virtual form before using MapPath. You must know the specifics of how it needs to be done. For example:

string fileName = root.GetElementsByTagName("FLD_DOC_ID")[0].InnerText;
fileName = fileName.Replace("..", "~");
if (File.Exists(Server.MapPath(fileName))
{
    // you probably do not want MapPath here:
    //proof.HRef = Server.MapPath(root.GetElementsByTagName("FLD_DOC_ID")[0].InnerText);
    proof.HRef = System.Web.VirtualPathUtility.ToAbsolute(fileName);
}

edited May 29, 2013 at 5:08

answered May 29, 2013 at 5:03

Igor

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Comments

sameh.q · Accepted Answer · 2013-05-29 05:01:00Z

1

Try to print out Server.MapPath(root.GetElementsByTagName("FLD_DOC_ID")[0].InnerText) it might be pointing a wrong path or something

Any way, checking a file if it exists or not is very trivial:

if(File.Exists(the file path))
{

}

answered May 29, 2013 at 5:01

sameh.q

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Comments

Soner Gönül · Accepted Answer · 2013-05-29 05:25:38Z

0

First you have to get filepath (filename) from database using select query then use that path with file.exists.

Example:

First get filename or filepath from database then,

if you get only filename then use below code:

if(File.Exits(Server.MapPath("Document/5292013/"+filename)))
{
}

or if you get only filepath then use below code:

if(File.Exits(Server.MapPath("filename")))
{
}

Thanks

edited May 29, 2013 at 5:25

Soner Gönül

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answered May 29, 2013 at 4:58

Hitesh

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