if(File.Exists()) statement isn't working - c#

What I want the script to do is show a test saying "Currently Editing: " and then the file path of the folder the if statement is seeing if it exists or not. Even when the file exists, the text still won't pop up. No error messages.
I tried a File.Exists if statement, but that won't work, so I don't know what else to try.
if (File.Exists(#textBox2.Text + textBox1.Text))
{
currentlyediting.Text = "Currently Editing: " + textBox2.Text + textBox1.Text;
currentlyediting.Visible = true;
}

You should use recommended Path.Combine() method instead of concatenating two or more strings.
Try this instead:
var path = Path.Combine(textBox2.Text, textBox1.Text);
if (File.Exists(path))
{
currentlyediting.Text = $"Currently Editing: {path}";
currentlyediting.Visible = true;
}

Related

Store locally a binary file file received as HTTP POST body [duplicate]

I want upload an image file to project's folder but I have an error in my catch:
Could not find a part of the path 'C:\project\uploads\logotipos\11111\'.
What am I do wrong? I want save that image uploaded by my client in that folder... that folder exists... ah if I put a breakpoint for folder_exists3 that shows me a true value!
My code is:
try
{
var fileName = dados.cod_cliente;
bool folder_exists = Directory.Exists(Server.MapPath("~/uploads"));
if(!folder_exists)
Directory.CreateDirectory(Server.MapPath("~/uploads"));
bool folder_exists2 = Directory.Exists(Server.MapPath("~/uploads/logo"));
if(!folder_exists2)
Directory.CreateDirectory(Server.MapPath("~/uploads/logo"));
bool folder_exists3 = Directory.Exists(Server.MapPath("~/uploads/logo/" + fileName));
if(!folder_exists3)
Directory.CreateDirectory(Server.MapPath("~/uploads/logo/"+fileName));
file.SaveAs(Server.MapPath("~/uploads/logo/" + fileName+"/"));
}
catch(Exception e)
{
}
Someone knows what I'm do wrong?
Thank you :)
Try this:
string targetFolder = HttpContext.Current.Server.MapPath("~/uploads/logo");
string targetPath = Path.Combine(targetFolder, yourFileName);
file.SaveAs(targetPath);
Your error is the following:
bool folder_exists3 = Directory.Exists(Server.MapPath("~/uploads/logo/" + fileName));
if(!folder_exists3)
Directory.CreateDirectory(Server.MapPath("~/uploads/logo/"+fileName));
You check if a directory exists, but you should check if the file exists:
File.Exists(....);
You need filename
file.SaveAs(Server.MapPath("~/uploads/logo/" + fileName+"/" + your_image_fillename));
Remove the last part of the path to save you have an extra "/"
It should be
file.SaveAs(Server.MapPath("~/uploads/logo/" + fileName);
Also you do not have a file extension set.

C# Why does System.IO.File.Exists keep coming up false?

string profile = "\\" + txtProfileLoad.Text + ".txt";
profile = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + profile;
The variable profile is receiving the correct file path, but when I run it the File.Exists comes up false every time.
if (System.IO.File.Exists(profile) == true)
{
System.IO.StreamReader profileReader;
profileReader = new System.IO.StreamReader(profile);
do
{
profileLevel = profileLevel + profileReader.ReadLine() + "\r\n";
} while (profileReader.Peek() != -1);
loadName(profileLevel);
wordBeingUsed.finalWord = loadedName;
Close();
}
else
{
MessageBox.Show("Invalid file name. Please try again.");
}
There aren't any permissions stopping it from seeing the file.
Any help with this would be appreciated. It's been driving me crazy.
Is this a pre-existing file that you are trying to read? Or is this a new file that you are hoping to create? What is the value inside txtProfileLoad.Text, issue most likely is within this property.
Run a sanity check:
var profile = "mytestfile.txt";
var myFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), profile);
File.WriteAllText(myFile, "Testing file write");
if (File.Exists(myFile))
{
// Access works.
}
else
{
//Didn't work
}
If above code works, then it is most likely that the name you create from txtProfileLoad.Text is different from actual file on the drive. On the other hand, if this is a file that doesn't exist yet; then of course it would return false when you check Exists.
You can use a string variable and pass the file name to it:
string tempFile = txtProfileLoad.Text;
string profile = #"C:\temp\tempfile.txt";
Also check out if you could use the file open method instead of File.Exist.
As per MSDN:
true if the caller has the required permissions and path contains the name of an existing file; otherwise, false. This method also
returns false if path is Nothing, an invalid path, or a zero-length
string. If the caller does not have sufficient permissions to read the
specified file, no exception is thrown and the method returns false
regardless of the existence of path.
Have you tried running as an administrator? Try do "right click" on the Visual Studio icon and select "Run as Administrator", and see if you still encounter the same behaviour.

How to delete File in c#

Please tell me why file.Delete(gpath) is not working?
i will be very thankful to you :) If there is any error on this code then tell about that error.This code can be wrong so please tell me.
string gpath;
string path=#"c:\Users\Adam\Desktop\";
string name="file";
string f="";
int i=0;
string ext=".txt";
while(File.Exists(path + name + f + ext))
{
i++;
f = i.ToString();
}
gpath = path + name + f + ext;
button2.Enabled = true;
File.Create(gpath);
File.Delete(gpath);//why there is an Error??
File.Create returns a FileStream which you haven't disposed of, so there's an open handle to the file. When you try and delete a file with that has a handle attached to it, you'll get an error saying that the file is in use.
I don't know why you're trying to delete the file straight after creating it so if you explain what you're ultimately attempting to do, there's likely a better way of going about it.

File.Exists(file) is false but file exist

I'm add a file in one controller and in another controller I want check if the file is exist. I' using File.Exist(file), but it's always false, even if the file exist...
I adding file, and image is added successful.
if ((image!= null & image.ContentLength > 0))
{
string name = event.EventId.ToString() + ".jpg";
var fileName = name;
var path = Path.Combine(Server.MapPath("~/App_Data/Plakaty"), fileName);
plakat.SaveAs(path);
}
I'm checking in another controller if this file exist:
string file = "~/App_Data/Plakaty/" + wyd.EventId.ToString() + ".jpg";
ViewBag.file_exist = System.IO.File.Exists(file); //always is false
And my View: (It's returning only "No file")
#if (ViewBag.file_exist == true)
{
<p>File exist</p>
}
else
{
<p>No file</p>
}
You need to do the Server.MapPath again when checking the file and do the forward slash.
string file = Server.MapPath("~") + #"\App_Data\Plakaty\"
+ wyd.EventId.ToString() + ".jpg";
ViewBag.file_exist = System.IO.File.Exists(file ); //always is false
You forgot to write Server.MapPath when checking if file exist
Have you checked permissions?
The Exists method returns false if any error occurs while trying to determine if the specified file exists. This can occur in situations that raise exceptions such as passing a file name with invalid characters or too many characters, a failing or missing disk, or if the caller does not have permission to read the file. See documentation
However most likely is what #Obama answered about the path being wrong as you didn't call Server.MapPath

Opening a txt file automatically using OnSelectedIndexChanged

What I am trying to do is to read in a file to a richTextBox automatically with the OnSelectedIndexChange method. There arent any errors, it just flat out doesnt work. Heres the code that I am working with
public void comboBox1_OnSelectedIndexChanged(object sender, EventArgs e)
{
string selectedPath = comboBox1.SelectedItem.ToString();
if (File.Exists(#"C:\\Mavro\\MavBridge\\" + selectedPath + "\\ " + "Comment" + ".txt"))
{
try
{
Thread.Sleep(0500);
System.IO.StreamReader textFile = new System.IO.StreamReader(#"C:\\Mavro\\MavBridge\\" + selectedPath + "\\ " + "Comment" + ".txt");
richTextBox1.Text = textFile.ReadToEnd();
textFile.Close();
}
catch
{
MessageBox.Show("Error: File cannot be opened!", "Error");
}
}
else
{
MessageBox.Show("No comment was found in this folder", "Alert");
}
}
Just for fun, lets have you try something. First, replace the following line:
if (File.Exists(#"C:\\Mavro\\MavBridge\\" + selectedPath + "\\ " + "Comment" + ".txt"))
with this:
if(File.Exists(string.Format("C:\\Mavro\\MavBridge\\{0}\\Comment.txt", selectedPath)))
It looks like you had an extra space ("\\ " + "Comment"), so I'm sure that's why it never hits this block of code. Also, anytime you have an object that needs to be closed/disposed, more often than not it implements IDisposable, meaning you should encapsulate the object within a using block:
Thread.Sleep(0500);
try
{
using(System.IO.StreamReader textFile = new System.IO.StreamReader(string.Format("C:\\Mavro\\MavBridge\\{0}\\Comment.txt", selectedPath)))
{
richTextBox1.Text = textFile.ReadToEnd();
}
}
catch
{
MessageBox.Show("Error: File cannot be opened!", "Error");
}
However, this can be simplified even further by bypassing the StreamReader entirely and using System.IO.File.ReadAllText instead:
richTextBox1.Text = System.IO.File.ReadAllText(string.Format("C:\\Mavro\\MavBridge\\{0}\\Comment.txt", selectedPath));
Well, one problem comes from the fact that you have:
#"C:\\Mavro\\MavBridge\\" + selectedPath + "\\ " + "Comment" + ".txt"
Since you are using a verbatim string (the # at the beginning), you do not need to put double slashes.
For the rest, make sure your file exists.
Later edit: also I am not sure if you copy/pasted in a rush or something like that, but did you actually put the catch block inside the try ?
1) What is the error you see?
2) Are you positive the file exists?
3) Are you positive the path created by your code is the path you are expecting?
4) Why are you sleeping the thread?
5) Why not just use File.ReadAllText?
6) File.Exists will return false if the code is running with permissions that do not have access to a file, even if the file does exist. Does the user your code is running as, have permissions?
true if the caller has the required permissions and path contains the
name of an existing file; otherwise, false. This method also returns
false if path is null, an invalid path, or a zero-length string. If
the caller does not have sufficient permissions to read the specified
file, no exception is thrown and the method returns false regardless
of the existence of path.
and
The Exists method returns false if any error occurs while trying to
determine if the specified file exists. This can occur in situations
that raise exceptions such as passing a file name with invalid
characters or too many characters, a failing or missing disk, or if
the caller does not have permission to read the file.
Get rid of # before each string. Your directory as it currently is uses actual double slashes instead of C:\Mavro\MavBridge. Use single slashes with \ or go with # at the beginning, but don't use both.
Also, I would strongly suggest using Path.Combine instead of concatenating pieces together like that.

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