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Multiple lines not reading into one list item

For some reason when I read in clipboard data and write it to a file, read that file in and set it to a list after delineating it with ¢ it loads up my listbox just fine on the first load as in when my form first loads up. However I have the following trigger on a button click, it is for some reason splitting up multiple line sections into separate list items, which is not what I want and not what the same code does when the form first loads. It's a little frustrating as it's writing to the text file and everything the same way.
private void button2_Click_1(object sender, EventArgs e)
{
// until next comment this is the same as what I have run at the start of the
// program, it loads up multiple lines into one list item as it should
string checkForDupe = File.ReadAllText(#"C:\temp\testfile.txt");
string checkResponses = File.ReadAllText(#"C:\temp\testfile2.txt");
if (Clipboard.ContainsText() && !checkForDupe.Contains(Clipboard.GetText()))
{
if (!checkResponses.Contains(Clipboard.GetText()))
{
var text = "\n" + Clipboard.GetText() + "¢";
File.AppendAllText(#"C:\temp\testfile.txt", text);
}
}
//The following has no affect on the issue stated in my question I have tried with out it.
string[] responseTags2 = File.ReadAllLines(#"C:\temp\testfile.txt");
List<string> _responseTags2 = new List<string>(responseTags2);
var count = _responseTags2.Count;
// Perform a reverse tracking.
for (var i = count - 1; i > -1; i--)
{
if (_responseTags2[i] == string.Empty) _responseTags2.RemoveAt(i);
}
// Keep only the unique list items.
_responseTags2 = _responseTags2.Distinct().ToList();
listBox1.BeginUpdate();
listBox1.DataSource = _responseTags2;
listBox1.EndUpdate();
}
input example:
"This is multiple lines in
a text file that is for testing
this application"
right output example (what I get when the same code is running at the start of the program before the form is loaded):
"This is multiple lines in
a text file that is for testing
this application" ,
"This is ANOTHER multiple lines in
a text file that is for testing
this application" ,
"This is a single line"
WRONG output (what I get when I run off the button click that eventual updates the UI):
"This is multiple lines in",
"a text file that is for testing",
"this application"

You are getting multiple lines in your listbox because you are not breaking the text by ¢ but just reading them into lines. This is your code:
string[] responseTags2 = File.ReadAllLines(#"C:\temp\testfile.txt");
Do this instead. Read all the text:
var contents = File.ReadAllText(#"C:\temp\testfile.txt");
Now split them using the character ¢:
var lines = s.Split('¢');
Here is the final linq to remove any empties and return distinct items:
var lines = s.Split('¢')
.Where(item => item != string.Empty)
.Distinct()
.ToList();
Then set lines to be the datasource:
listBox1.BeginUpdate();
listBox1.DataSource = lines;
listBox1.EndUpdate();

This code works fine for me, but I think it's basically what you're doing, only slightly cleaned up (and I didn't use the second file since you're not using it in the example).
My suggestion would be to create a single method that does this operation, and then call that method from wherever you need it. This way you will ensure that you're doing the exact same thing in both (all) places.
UPDATE
I updated the method to save the clipboard text as-is, plus adding a ¢ character to the end, when saving to the file. Then, when reading the file the second time, first join all the lines with a space character, then split on the ¢ character, and use that list for your data source.
private const string DefaultSaveFile = #"C:\temp\testfile.txt";
private void CopyUniqueClipboardTextToFile(string filePath = null,
bool updateListbox = true)
{
// Use global default file if nothing was passed
if (filePath == null) filePath = DefaultSaveFile;
// Ensure our files exist
if (!File.Exists(filePath)) File.CreateText(filePath).Close();
string fileContents = File.ReadAllText(filePath);
string clipboardText = Clipboard.GetText();
// Update the file with any new clipboard text
if (Clipboard.ContainsText() && !fileContents.Contains(clipboardText))
{
// Save the lines to our file, with a '¢' character at the end
File.AppendAllText(filePath, $"{Environment.NewLine}{clipboardText}¢");
}
// Re-read the new file into a single string
string entireFileAsOneLine = string.Join(" ",
File.ReadAllLines(filePath).Distinct().ToList());
// Now split that string on the '¢' character
string[] listItems = entireFileAsOneLine.Split('¢');
// Update listbox if necessary
if (updateListbox)
{
listBox1.BeginUpdate();
listBox1.DataSource = listItems;
listBox1.EndUpdate();
}
}
private void button2_Click(object sender, EventArgs e)
{
CopyUniqueClipboardTextToFile();
}

What I ended up doing is the following;
string responseTags2 = checkForDupe.Replace('\n', '╜');
I replaced new lines with a rarely used character, then split by ¢ to fill the list.
To replace the special character so that it would be formatted correctly again I just replaced it when setting the clipboard text with the \n again.

How to display a specific line at the top of a RichTextBox

I'm pulling the content from a text file into a RichTextBox. I've got the RichTextBox set up to where it only shows 6 lines at a time. I've got a search method that finds the text I need within the RichTextBox, but what I am needing it to do is display 6 specific lines. Each "item" in my text file consists of 6 lines. No matter which of the six lines the search method finds the text on, I need the RichTextBox to only display the 6 lines of each "item" with the currently selected "found" text remaining highlighted.
I've gotten it working reasonably well thanks to a few code examples I've pull from this site. But every now and then, it doesn't work entirely well, and am looking for some advice from a fresh set of eyes looking at my code and perhaps even be told an easier/more efficient way to go about it. But here is my code so far. Thanks in advance!
try
{
string s = txtFindPlaylistEntry.Text;
rtxEditPlaylistEntry.Focus();
findPosEntry = rtxEditPlaylistEntry.Find(s, findPosEntry, RichTextBoxFinds.None);
// Jump to the line we need.
int count = rtxEditPlaylistEntry.GetLineFromCharIndex(findPosEntry);
count = (count - (count % 6)) + 1; // Must be divisible by 6 then plus 1
rtxEditPlaylistEntry.SelectionStart = rtxEditPlaylistEntry.Find(rtxEditPlaylistEntry.Lines[count]);
rtxEditPlaylistEntry.ScrollToCaret();
rtxEditPlaylistEntry.Select(findPosEntry, s.Length);
findPosEntry += txtFindPlaylistEntry.Text.Length;
}
catch
{
MessageBox.Show("No occurences found");
findPosEntry = 0;
}
As of right now, I'm attempting to use a line count with modulus plus 1 to get the line I need. Like I said, it works, just not 100% of the time and I can't figure out why.
EDIT to try to accommodate Minimal, Complete, Verifiable.
I've already posted my "find" function. Here is other related code that might be useful. First, here is my code for creating the various controls I am using.
rtxEditPlaylistEntry = new RichTextBox();
rtxEditPlaylistEntry.Location = new System.Drawing.Point(15, 90);
rtxEditPlaylistEntry.Size = new System.Drawing.Size(375, 85);
rtxEditPlaylistEntry.Multiline = true;
rtxEditPlaylistEntry.ScrollBars = RichTextBoxScrollBars.None;
Here is my button function to pull text from a file and place it into the RichTextBox.
private void btnBrowseForPlaylistToEditEntry_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "LPL Files|*.lpl";
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
savedFileNameEntry = openFileDialog.SafeFileName;
txtPathToPlaylistToEditEntry.Text = openFileDialog.FileName;
}
// After finding the file, load it into the richtextbox control
using (StreamReader sr = File.OpenText(openFileDialog.FileName))
{
// Initially show the first 6 lines (IE first entry). This should be accomplished by
// the richtextbox control settings
rtxEditPlaylistEntry.Text = sr.ReadToEnd();
}
previousNextCount = 0;
}
I hope this is sufficient. If not please let me know!

Lightswitch export all rows to CSV

I am using c# and VS2012 on a lightswitch web-application,
I wish to export my data to CSV (on a search screen!), but can't reach any POC,
As i understand there are 2 main problems - a savefiledialog must be caused directly from a user button and in it must happened in the main dispatcher,
I used this code :
partial void mySearchScreen_Created()
{
var CSVButton = this.FindControl("ExportToCSV");
CSVButton.ControlAvailable += ExportCSV_ControlAvailable;
}
private void ExportCSV_ControlAvailable(object sender, ControlAvailableEventArgs e)
{
this.FindControl("ExportToCSV").ControlAvailable -= ExportCSV_ControlAvailable;
Button Button = (Button)e.Control;
Button.Click += ExportCSV_Click;
}
private void ExportCSV_Click(object sender, System.Windows.RoutedEventArgs e)
{
Microsoft.LightSwitch.Details.Client.IScreenCollectionProperty collectionProperty = this.Details.Properties.mySearch;
var intPageSize = collectionProperty.PageSize;
//Get the Current PageSize and store to variable
collectionProperty.PageSize = 0;
var dialog = new SaveFileDialog();
dialog.Filter = "CSV (*.csv)|*.csv";
if (dialog.ShowDialog() == true) {
using (StreamWriter stream = new StreamWriter(dialog.OpenFile())) {
string csv = GetCSV();
stream.Write(csv);
stream.Close();
this.ShowMessageBox("Excel File Created Successfully. NOTE: When you open excel file and if you receive prompt about invalid format then just click yes to continue.", "Excel Export", MessageBoxOption.Ok);
}
}
collectionProperty.PageSize = intPageSize;
//Reset the Current PageSize
}
private string GetCSV()
{
StringBuilder csv = new StringBuilder();
int i = 0;
foreach (var orderRow_loopVariable in mySearch) {
var orderRow = orderRow_loopVariable;
////HEADER
if (i == 0) {
int c = 0;
foreach (var prop_loopVariable in orderRow.Details.Properties.All().OfType<Microsoft.LightSwitch.Details.IEntityStorageProperty>()) {
var prop = prop_loopVariable;
if (c > 0) {
csv.Append(",");//Constants.vbTab
}
c = c + 1;
csv.Append(prop.DisplayName);
}
}
csv.AppendLine("");
////DATA ROWS
int c1 = 0;
foreach (var prop_loopVariable in orderRow.Details.Properties.All().OfType<Microsoft.LightSwitch.Details.IEntityStorageProperty>()) {
var prop = prop_loopVariable;
if (c1 > 0) {
csv.Append(",");//Constants.vbTab
}
c1 = c1 + 1;
csv.Append(prop.Value);
}
i = i + 1;
}
if (csv.Length > 0) {
return csv.ToString(0, csv.Length - 1);
} else {
return "";
}
}
This works, but it only get's me the first page items,
On another thing i had to do i solved that problem by using this code :
this.DataWorkspace.myDataContextData.MySearch(...).Execute();
Yet trying that instead of just using 'MySearch' gives me the following error :
t is not valid to call Execute() on a different Dispatcher than the ExecutableObject's Logic Dispatcher.
Why is it so difficult to do such a basic thing related to data (export to csv/excel) on a system build for handling data ?
Any ideas ?

The simplest workaround if this is the only use of the search screen would be to turn off paging. To do this go to the screen designer, highlight the query on the left, and in properties uncheck 'support paging.'
I'm not sure what the limitations are, but you can run some code in a different dispatcher using:
this.Details.Dispatcher.BeginInvoke(() =>
{
//This runs on main dispatcher
});

I don't think there's anything wrong with your code, but I've noticed that it takes a while to reset the page size on a large collection, in which time the rest of your code continues to execute. I think that's why you only get the first page. The only solution I've found is to wait.
When the "File Download - Security Warning" dialog pops up, keep an eye on the 'busy' indicator on the screen's tab and also the 'Page x of y' status at the bottom of the grid if you can see it. Only when the busy indicator has gone and the status just says 'Page' should you click OK to continue.
I haven't figured out a way of doing this programmatically so it's not a very helpful feature unless you have a very tightly controlled user population. But if it's just you and a couple of power users, it is workable. I'm also not sure if this has been improved on in versions after VS2012.
There can be a downside to the other answer of taking the paging off the query entirely. I've tried that workaround when the grid collection was being displayed in a modal window and the window became uncloseable if there were too many rows in the grid.
Phil

Multi-line textbox shows mult-line string as One-Line

I am making a program where you enter an item's name and it's description. Then you add it to a listbox and after you are done you can save all the items to a 'txt' file. (Using StreamWriter). This program also has an edit button that allows you to edit the description in the listbox by removing it first from the listbox and then showing it back in the textbox (, so you can edit it)
If the description is multi-line, it will successfuly show it multi-line when I select it in the listbox and click the edit button that will show it back in the textbox. BUT if I save all the items in the listbox to a file first. And then open up the file again so it load the items back into the listbox. And then clicking the edit button...
The multi-line description will show as a one-line description in the textbox.
I am not sure why - but I've also made a label that will show the exact string that the textbox is suppose to show and the label is showing it multi-lined while textbox isn't!
The string is definitely multi-line but the multi-line textbox is showing it one-line after loading the items back into the listbox using StreamReader.
Example of the multi-line string: (named "theString1")
This is line 1
This is line 2
Using the following code: TextBox1.Text = theString1; this appears in the text box:
This is line1This is line2
But if I use the same code with a label. It will show it correctly.
If someone can explain to me why this is happening I will be more than happy. I just need an explanation.
Thanks in advance.
---[More info]---
Just so you know. I came up with this code myself so it is probably set-up all wrong.
I will be happy if you tell me a better way to do this.
I am using a list to store the description text + the item name. I seperated these two using '`' .And splited the string (see code).
This is the code that happens when you click the edit button. It removes the item from
the listbox and shows it in the textbox so you can edit it and add to listbox again:
int index = listBox.SelectedIndex;
itemName.Text = listBox.SelectedItem.ToString();
var descVar = descList.ElementAt(index).Split('`');
string theString1 = descVar[1];
TextBox1.Text = theString1;
This is how it saves it to a file:
FileDialog save = new SaveFileDialog();
save.Title = "Save information...";
save.DefaultExt = "Text File|*.txt";
save.Filter = "Text File|*.txt";
if (save.ShowDialog() == DialogResult.OK)
{
StreamWriter sw = new StreamWriter(save.FileName);
foreach (string s in listBox.Items) //This writes the names of item names.
{
sw.WriteLine(s);
}
sw.WriteLine("`1`"); //I use this to seperate the item names from description.
foreach (string s in descList) //This writes the descriptions that are stored in a list named "descList".
{
sw.WriteLine(s);
sw.WriteLine("``"); //I use this to seperate descriptions from each other because they are multi-line.
}
sw.WriteLine("`2`"); //Just something so I know where it ends. :D
sw.Close();
}
else
{
}
And this is how it loads: (This can definitely be better!)
FileDialog load = new OpenFileDialog();
load.Title = "Load information...";
load.DefaultExt = "Text File|*.txt";
load.Filter = "Text File|*.txt";
if (load.ShowDialog() == DialogResult.OK)
{
List<string> loadDesc = new List<string>(); //Don't ask you will see why
descList.Clear();
while (listBox.Items.Count > 0) //This removes all items in the listbox to load new ones.
{
int index = 0;
listBox.Items.RemoveAt(index);
descList.Clear();
itemName.Text = "";
}
StreamReader rw = new StreamReader(load.FileName);
for (; true; )
{
string read = rw.ReadLine();
if (read == "`1`") //When it reaches the separator I made it stops reading.
{
break;
}
else
{
listBox.Items.Add(read);
}
}
for (; true; )
{
string read = rw.ReadLine();
if (read == "`2`")
{
break;
}
else
{
loadDesc.Clear();
loadDesc.Add(read);
for (; true; ) //Please tell me if this can be done differently.
{
string read2 = rw.ReadLine();
if (read2 != "``") //This will keep reading the whole description until it reaches the separator.
{
loadDesc.Add(read2); //Adds each line into the list I created.
}
else
{
break;
}
}
string oneBigString = string.Join("\n", loadDesc); //This basically converts all strings in a list into one string.
descList.Add(oneBigString); //And this finally add the string to the main list from where it then loads.
}
}
}
else
{
}
I believe that is it.
If there is anything else you need - tell me.

string oneBigString = string.Join("\n", loadDesc); is where the issue is.
Use Environment.NewLine instead of \n
I'm also just going to go over a couple of things that could be improved with your code (there are a lot, but I just want to cover a couple).
while (listBox.Items.Count > 0) //This removes all items in the listbox to load new ones.
You don't need to iterate over every element in the listbox to remove it. You can just do listBox.clear()
Also, using break to get out of loops is generally bad practice. This should be written as...
for (; true; )
{
string read = rw.ReadLine();
if (read == "`1`") //When it reaches the separator I made it stops reading.
{
break;
}
else
{
listBox.Items.Add(read);
}
}
this
string read = rw.ReadLine()
while(read != "`1`")
{
listBox.Items.Add(read);
read = rw.ReadLine()
}
but theres more, what if 1 is never found in the file? It would crash your program, so you also need to check if there is more data to be read...
string read = rw.ReadLine()
while(read != "`1`" && !sw.EndOfStream) // Make sure you're not at the end of the file
{
listBox.Items.Add(read);
read = rw.ReadLine()
}

Page-Range-Problem at Printing a Document

i try to print out the content of my editor:
PrintDialog pd = new PrintDialog();
pd.PageRangeSelection = PageRangeSelection.AllPages;
pd.UserPageRangeEnabled = true;
FlowDocument fd = DocumentPrinter.CreateFlowDocumentForEditor(CurrentDocument.Editor);
DocumentPaginator dp = ((IDocumentPaginatorSource)fd).DocumentPaginator;
bool? res = pd.ShowDialog();
if (res.HasValue && res.Value)
{
fd.PageHeight = pd.PrintableAreaHeight;
fd.PageWidth = pd.PrintableAreaWidth;
fd.PagePadding = new Thickness(50);
fd.ColumnGap = 0;
fd.ColumnWidth = pd.PrintableAreaWidth;
pd.PrintDocument(dp, CurrentDocument.Editor.FileName);
}
The test-document i used has about 14 pages (with this pagesize-settings).
i tested it: the printdialog appears and I´ve chosen a pagerange (i typed "1-3" into the textbox) and clicked print. above the printdocument() I set a breakpoint and looked into the printdialog-object. it says pd.PageRangeSelection = PageRangeSelection.UserPage and pd.PageRange = {1-3}. I guess this is right, because I wanted to print out only page 1-3. then the printdocument() executed and in the output-pdf (for testing I use a pdf-printer) has 14 pages (the whole document was printed).
where is my mistake? why does the pagerange-setting not work?
thanks for your help

In your code you manually set:
pd.PageRangeSelection = PageRangeSelection.AllPages;
This is why your code prints all the pages.

The reason for this is because FlowDocument's DocumentPaginator does not handle UserPageRanges. You can see that FlowDocument implementation creates a FlowDocumentPaginator, and it doesn't take into account ranges.
If it did handle it, in FlowDocumentPaginator.(Async)GetPage you would see, code checking to see if the page requested to be printed is in an index of available pages; or maybe if a key exists in a Dictionary whose value is the DocumentPage to print.
In other words, and the reason the PrintDialog default has UserPageRangeEnabled set to false, is because in order to use that feature, you'll usually have to write your own DocumentPaginator or you have to add some logic to compile a new temporary document to hold only the pages you want to print.
Feel free to ask any questions.