Develop Reference

How do I use the variable of the selected folder?

When i select a folder manually, through FolderBrowserDialog, my need to substitute the path to the code below.
Where "%ProgramFiles (x86)%\MyApp" must be replaced with the variable of the selected folder + file name.
As a result, when selecting a folder, the file size "testFile.txt" in "label1" should be displayed (there will be two or more such files).
private void button1_Click(object sender, EventArgs e)
{
FolderBrowserDialog folderBrowser = new FolderBrowserDialog();
DialogResult result = folderBrowser.ShowDialog();
if (result == DialogResult.OK)
{
// Determine the size of the file in KB (dividing the number of bytes by 1024)
FileInfo fs1 = new FileInfo(Environment.ExpandEnvironmentVariables("%ProgramFiles(x86)%\\MyApp\\testFile.txt"));
long FileSize1 = fs1.Length / 1024;
label1.Text = "testFile.txt (" + Convert.ToString(FileSize1) + " KB)";
if (FileSize1 > 180 & FileSize1 < 186) // If the file is larger and smaller than the specified sizes
{
label1.ForeColor = Color.Green;
}
else
{
label1.ForeColor = Color.Red;
}
}
}
Decision, edit:
FileInfo fs1 = new FileInfo(folderBrowser.SelectedPath + "\\testFile.txt");
or
FileInfo fs1 = new FileInfo(Path.Combine(folderBrowser.SelectedPath, "testFile.txt"));

The official documentation has an item dedicated specifically to this: How to: Choose Folders with the Windows Forms FolderBrowserDialog Component
To choose folders with the FolderBrowserDialog component
In a procedure, check the FolderBrowserDialog component's DialogResult property to see how the dialog box was closed and get the
value of the FolderBrowserDialog component's SelectedPath property.
If you need to set the top-most folder that will appear within the tree view of the dialog box, set the RootFolder property, which takes
a member of the Environment.SpecialFolder enumeration.
Additionally, you can set the Description property, which specifies the text string that appears at the top of the
folder-browser tree view.
In the example below, the FolderBrowserDialog component is used to
select a folder, similar to when you create a project in Visual Studio
and are prompted to select a folder to save it in. In this example,
the folder name is then displayed in a TextBox control on the form. It
is a good idea to place the location in an editable area, such as a
TextBox control, so that users may edit their selection in case of
error or other issues. This example assumes a form with a
FolderBrowserDialog component and a TextBox control.
public void ChooseFolder()
{
if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
{
textBox1.Text = folderBrowserDialog1.SelectedPath;
}
}
According to that example, you can get a string to the chosen folder using folderBrowser.SelectedPath.

How Do I use Drag And Drop To Export A File (C#)

I am currently using a file dialog to export a file, but I was wondering how I could export my file using drag and drop. I couldn't figure out how to get the file path of where the item is being dropped. Here is the code that I used for open file dialogue in case its required.
if (this.listView1.SelectedItems.Count > 0)
{
ListViewItem item = this.listView1.SelectedItems[0];
string text = this.faderLabel8.Text;
if (!text.EndsWith(#"\"))
{
text = text + #"\";
}
using (SaveFileDialog dialog = new SaveFileDialog())
{
if (dialog.ShowDialog() == DialogResult.OK)
{
Jtag.ReceiveFile(item.SubItems[0].Text, text + item.SubItems[0].Text);
}
}
}

You don't need the path of where the file is being dropped. Instead you need to create a temporary file.
Save file to a temporary folder
Initiate drag on an event/command, such as mouse down, in the following way:
//(This example is uses WPF/System.Windows.DragDrop)
//Create temporary file
string fileName = "DragDropSample.txt";
var tempPath = System.IO.Path.GetTempPath();
var tempFilePath = System.IO.Path.Combine(tempPath, fileName);
System.IO.File.WriteAllText(tempFilePath, "Testing drag and drop");
//Create DataObject to drag
DataObject dragData = new DataObject();
dragData.SetData(DataFormats.FileDrop, new string[] { tempFilePath });
//Initiate drag/drop
DragDrop.DoDragDrop(dragSourceElement, dragData, DragDropEffects.Move);
For WinForms example and more details see:
Implement file dragging to the desktop from a .net winforms application?

If you want it to be useful through "drag and drop" you would require some sort of graphical interface that displays the files in a container where they are and then another container to where you want to move them. When you highlight an item with your mouse you add them to your itemList and when your drop them you copy them. Just make sure the List is emptied once in case you remove the highlight.

How to add Save file Dialog Box using C#

I need to implement something similar to Notepads' save option. Assuming I have a button placed next to a RichTextBox, what I want is, when this button is clicked, a Dialogue box will open up, which will look similar to the one that appears when Save As is clicked. I would like to save the content of the RichTextBox in text format, by entering the name of file in the Save Dialogue box.

private void Save_As_Click(object sender, EventArgs e)
{
SaveFileDialog _SD = new SaveFileDialog();
_SD.Filter = "Text File (*.txt)|*.txt|Show All Files (*.*)|*.*";
_SD.FileName = "Untitled";
_SD.Title = "Save As";
if (__SD.ShowDialog() == DialogResult.OK)
{
RTBox1.SaveFile(__SD.FileName, RichTextBoxStreamType.UnicodePlainText);
}
}

For WPF you should use this SaveFileDialog.
var dialog = new Microsoft.Win32.SaveFileDialog();
dialog.Filter = "Rich Text File (*.rtf)|*.rtf|All Files (*.*)|*.*";
dialog.FileName = "Filename.rtf"; //set initial filename
if (dialog.ShowDialog() == true)
{
using (var stream = dialog.OpenFile())
{
var range = new TextRange(myRichTextBox.Document.ContentStart,
myRichTextBox.Document.ContentEnd);
range.Save(stream, DataFormats.Rtf);
}
}

This works for text files and was tested in WPF.
var dialog = new Microsoft.Win32.SaveFileDialog();
dialog.Filter = "Text documents (.txt)|*.txt|All Files (*.*)|*.*";
dialog.FileName = "Filename.txt";
if (dialog.ShowDialog() == true)
{
File.WriteAllText(dialog.FileName, MyTextBox.Text);
}

SaveFileDialog sfDialog = new SaveFileDialog();
sfDialog.ShowDialog();
OutputStream ostream = new FileOutputStream(new File(sfDialog.FileName));
WorkBook.write(ostream);
ostream.close();

misread the question - Ray's answer is valid for OP
This works only in Windows Forms.
You should take a look at the SaveFileDialog class: http://msdn.microsoft.com/en-us/library/system.windows.forms.savefiledialog.aspx
And save the file using something like this (see here):
rtf.SaveFile(dialog.FileName);

There is a SaveFileDialog component which you can use, read here to find out how it works and a working sample.

adding files to listview in C#

I have a Listview and an "ADD" button,when I click on ADD i should be able to browse the files in computer, select files and when click OK or the Open, the file list should be added in the listview...how to do that...is listview correct or any other alternative...?

ListView should be fine for file listing. Just be aware that longer file paths are difficult to see (have to horizontally scroll which is bad!) if you are gonna just add the full path to list. You can toy with the idea of other representation like:
File.Txt (C:\Users\Me\Documents)
C:\Users\..\File.Txt
etc
As far as doing it using code is concerned, you will need to use OpenFileDialog control to let user choose the files.
var ofd = new OpenFileDialog ();
//add extension filter etc
ofd.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*" ;
if(ofd.ShowDialog() == DialogResult.OK)
{
foreach (var f in openFileDialog1.FileNames)
{
//Transform the list to a better presentation if needed
//Below code just adds the full path to list
listView1.Items.Add (f);
//Or use below code to just add file names
//listView1.Items.Add (Path.GetFileName (f));
}
}

If you want to do this in the designer, you can take the following steps to add the images to the ListView control:
Switch to the designer, click on the ImageList component on the Component Tray, there will be a smart tag appear on the top-right corner of the ImageList.
Click the smart tag, and click "Choose Images" on the pane.
On the pop-up Image Collection Editor dialog, choose the images from the folder your want.
Click OK to finish adding images to the ImageList.
Click the ListView on the form, there will be a smart tag appear on the top-right corner.
Click the smart tag, you will find there're three ComboBoxes there, choose a ImageList from the list as you want.
Click the "Add items" option on the smart tag, a ListViewItem Collection Editor will appear, you can add items to the ListView, it's important here to set the ImageIndex or ImageKey property, or the image won't appear.
Click OK to finish item editing, now you'll find the images are displayed on the ListView.
If you want to add the images to the ListView by code, you can do something like this
give the following code in addButton_click
var fdlg = new OpenFileDialog();
fdlg.Multiselect = true;
fdlg.Title = "Select a file to add... ";
fdlg.InitialDirectory = "C:\\";
fdlg.Filter = "All files|*.*";
fdlg.RestoreDirectory = true;
if (fdlg.ShowDialog() == DialogResult.OK)
{
foreach (var files in fdlg.FileNames)
{
try
{
this.imageList1.Images.Add(Image.FromFile(files));
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
this.listView1.View = View.LargeIcon;
this.imageList1.ImageSize = new Size(32, 32);
this.listView1.LargeImageList = this.imageList1;
//or
//this.listView1.View = View.SmallIcon;
//this.listView1.SmallImageList = this.imageList1;
for (int j = 0; j < this.imageList1.Images.Count; j++)
{
ListViewItem item = new ListViewItem();
item.ImageIndex = j;
this.listView1.Items.Add(item);
}
}

Saving textBox input to .txt file without use of SaveFileDialog

I want to eliminate the need for SaveFileDialog and just add the ability for a user to save the input onClick without having to go through the SaveFileDialog. The filename will be set by txtModuleName.Textand the location/directory and file type will always remain the same.
string Saved_Module = "";
SaveFileDialog saveFD = new SaveFileDialog();
saveFD.InitialDirectory = "C:/Modules/";
saveFD.Title = "Save your file as...";
saveFD.FileName = txtModuleName.Text;
saveFD.Filter = "Text (*.txt)|*.txt|All Files(*.*)|*.*";
if (saveFD.ShowDialog() != DialogResult.Cancel)
{
Saved_Module = saveFD.FileName;
RichTextBox allrtb = new RichTextBox();
// This one add new lines using the "\n" every time you add a rich text box
allrtb.AppendText(txtModuleName.Text + "\n" + ModuleDueDate.Text + "\n" + txtModuleInfo.Text + "\n" + txtModuleLO.Text);
allrtb.SaveFile(Saved_Module, RichTextBoxStreamType.PlainText);
RE-ATTACK - How do I replace the use of the Dialog box when saving with a simple button that says 'Save' which OnClick uses the txtModuleName.Text as its name and saves it to a set directory C:/Modules/ in the form of a .txt file.
Thanks in advance!

You need to provide the full path and filename to RichTextBox.SaveFile instead of using SaveFileDialog.FileName. Add using System.IO;, and then use something similar to this:
private void button1_Click(object sender, EventArgs e)
{
String Saved_Module = Path.Combine("C:\\Module", txtModuleName.Text);
allrtb.SaveFile(Saved_Module, RichTextBoxStreamType.PlainText);
}