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SaveFileDialog doesn't show any possible extensions despite using Filter option

I'm creating right now an application in C# which saves data to the file upon clicking a button. The name and locations of the file is defined by the user, and i want the program to automatically add .txt extension to the name, as well as show only 1 possible extensions in "save files as" combobox. I have this code:
SaveFileDialog Dialog1 = new SaveFileDialog();
Dialog1.DefaultExt = "txt";
Dialog1.Filter = "Pliki tekstowe | *.txt";
Dialog1.AddExtension = true;
private void button1_Click(object sender, EventArgs e)
{
if (Dialog1.ShowDialog() == DialogResult.OK)
{
System.IO.Stream fileStream = Dialog1.OpenFile();
System.IO.StreamWriter sw = new System.IO.StreamWriter(fileStream);
sw.WriteLine("Writing some text in the file.");
sw.WriteLine("Some other line.");
sw.Flush();
sw.Close();
}
this.Close();
}
But whenever i click the button, i have no options to choose from in the combobox, as well as the .txt extensions are not added to the file name in case the extensions is not specified by the user himself. I know i can somehow bypass that by checking if the user gave the proper extensions, and in case he didn't add ".txt" to the name but i really wanted to know, why that piecei of code doesn't function. Any help?

The problem is the space. Just change it to this:
Dialog1.Filter = "Pliki tekstowe|*.txt";
and you should be in business.
Otherwise it's trying to match files of the pattern  *.txt (subtly compared to *.txt) - which you probably don't have.

take a look at the following example and see the difference:
http://msdn.microsoft.com/en-us/library/system.windows.forms.savefiledialog(v=vs.110).aspx
you should try firstly to add this to your filter:
"txt files (*.txt)|*.txt|All files (*.*)|*.*"
for completeness you should add the (*.txt) string in your filter for descriptive reasons (thanks for clarifying Yuck). Try it - see what happens :)
remember it is sensitive in terms of the string. so try not to put things like a space between the file extensions

I had a similar issue where the save dialog box on firefox and safari doesn't detect the file extension even though I had Content-Type header set to "application/pdf". The issue turned out to be spaces in the name of the file. I replaced the file name with '-' (hyphens) and that fixed it.

C# - How to customize OpenFileDialog to select multiple folders and files?

I have posted - How to use OpenFileDialog to select a folder?, I couldn't find the correct answer.
So, I have changed my question.
I want to customize OpenFileDialog to select multiple folders and files. I tried to find a solution and could see some posts about it.
From the internet, I found the following project - https://github.com/scottwis/OpenFileOrFolderDialog.
However, while using this, I faced one problem. It uses the GetOpenFileName function and OPENFILENAME structure from MFC.
And OPENFILENAME has the member named "templateID".
It's the identifier for dialog template. And the sample project has the "res1.rc" file and, also have the templated dialog in it.
But I don't know How can I attach this file to my C# project?
Or is there any other perfect solution about - "How to customize OpenFileDialog to select multiple folders and files?"?

If you use the FileNames property instead of the FileName property, you get a string array of each file selected, you select multiple files using the shift key. Like so:
private void button1_Click(object sender, EventArgs e)
{
OpenFileDialog x = new OpenFileDialog();
x.Multiselect = true;
x.ShowDialog();
string[] result = x.FileNames;
foreach (string y in result)
MessageBox.Show(y, "Selected Item", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
For files and folders you need to use the CommonOpenFileDialog included with the WinAPI, the particular class is here.

Try this:
openFileDialog.Multiselect = true;

You might not get a built in .Net control like that. Definitely the OpenFileDialog can not function as both File as well as Folder browser. You have two choices go for a third party tool like the one you found second make your own control. Surprisingly you might not find creating a very simple version of your own control very difficult.

OpenFileDialog - only display filenames that have no extensions

I have the following code in my C# program:
OpenFileDialog fDialog = new OpenFileDialog();
fDialog.Title = "Open a file";
fDialog.Filter =
"NCF files (*.ncf)|*.ncf|All files (*.*)|*.*|No Extensions (*.)|*.";
I want to be able to have the user pick from the following:
*.NCF (files with .NCF extension only)
**.* (all files)
and files that have no extensions such as:
filewithnoextension
I know ***.* will do this, but it also displays the .NCF, .TXT, and all other files in the same directory. I just want to be able to display filenames that have no extensions.
Filtering with *. does not do the trick. It works fine when doing it with a DOS window (dir *.) , but C# seems to ignore the *. filter.
Is there a way I can do this with C#?
Thanks.

I know this works:
fDialog.Filter = "No extension Files|" + null;
I haven't tested with multiple selections..
Altough this is an old post, I though it would benefit someone looking for a way to only display files with no extensions..

A readme file normally has an extension. I suppose you did, but did you check this folder option to see the extensions of known file types? Has it changed anything?
EDIT #1
Frankly, I doubt you'd be able to make the OpenFileDialog display files with no extension, as the Filter property is based on the extension.
Perhaps you could inherit base your own implemented OpenFileDialog using the System.IO namespace objects such as DirectoryInfo, for instance, which will allow you to get the browsed folder files with the Getfiles() method, then filter yourself through LINQ to display the files with no extension only with the FileInfo.Extension property.
EDIT #2
Since the OpenFileDialog is sealed, you may use it as a nested type and implement your own methods using this nested type.
I hope this helps you!

If the other software program creates these files in the same location, why not have your code add an extension (something innocuous like ".XXX") to every extension-less file in that folder, and then show the dialog?
Edit: Or, see this MSDN article:
http://msdn.microsoft.com/en-us/library/ms646960(VS.85).aspx
From the Filters section:
The CDN_INCLUDEITEM notification
message provides another way to filter
the names that the dialog box
displays. To use this message, provide
an OFNHookProc hook procedure and
specify the OFN_ENABLEINCLUDENOTIFY
flag in the OPENFILENAME structure
when you create the dialog box. Each
time the user opens a folder, the
dialog box sends a CDN_INCLUDEITEM
notification to your hook procedure
for each item in the newly opened
folder. The return value of the hook
procedure indicates whether the dialog
box should display the item in the
folder's item list.
Down at the bottom in the Explorer-Style Hook Procedures section, the article explains how to do this. Basically, you pass an event handler to the OpenFile dialog, and each time the user navigates to a new folder, the dialog iterates through all the files in the folder and calls your event handler for each one. Inside the event handler, you would put your code to determine if the file has an extension or not, and return true or false, accordingly.

I thought using *. would work, but it doesn't, so it seems that's a limitation of the OpenFileDialog control.
You could create your own dialog but the OpenFileDialog is not inheritable so this would end up being a lot of work for just a small feature.
Is the file with no extension created by your own application? If that's the case, you could give it a custom extension for your filtering. If it's not, then I'm afraid I can't think of anything else to help you :(
Good luck!

Action required to do the operation "browse"

If i created a button named Browse ,,If i click Browse button i have to
browse my system folders .Can any one give me the required code to browse
the specific folders

Check out the FolderBrowserDialog if you are wanting to find a folder.
If you are wanting to open a file, you can use the OpenFileDialog.
Both links provide examples of how to use the dialogs.
This MSDN link provides how to get the special system folders. And you can specify the type of special folder you want by using the appropriate enumeration. Check this link for those.
Essentially, you are going to do something like so if you want to pop up a dialog and browse to the System folder and select some files from there:
private void button1_Click(object sender, EventArgs e)
{
OpenFileDialog od = new OpenFileDialog();
od.InitialDirectory = Environgment.SpecialFolder.System;
od.Multiselect = true;
if (od.ShowDialog() == DialogResult.OK)
{
// do stuff
// od.Filenames will hold the string[] of selected files
}
}

Assuming you want to display the results in a list named files something like:
String directory = Environment.GetFolderPath (Environment.SpecialFolder.System);
String[]files = Directory.GetFiles (directory);
foreach (String file in files)
files.Add (file);
You can use a FolderBrowserDialog control and call the code there if you want to browse multiple directories.

What's the best way to let a user pick a subdirectory in C#?

What's the best way to let a user pick a subdirectory in C#?
For example, an app that lets the user organize all his saved html receipts. He most likely is going to want to be able to select a root subdirectory that the program should search for saved webpages (receipts).
Duplicate:
Browse for a directory in C#

The Folder Browser Dialog is the way to go.
If you want to set an initial folder path, you can add this to your form load event:
// Sets "My Documents" as the initial folder path
string myDocsPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
FolderBrowserDialog1.SelectedPath = myDocsPath;

Check the FolderBrowserDialog class.
// ...
if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
{
textBox1.Text = folderBrowserDialog1.SelectedPath;
}

FolderBrowserDialog works just fine for this purpose.

FolderBrowserDialog works, but offers very little customization.
If you want a textbox where users can type in the path have a look here
Dupe of:
Browse for a directory in C#

Whatever you do, don't use the FolderBrowserDialog.
Just kidding. Use that.