C# listview searching virtual mode - c#

i'm having trouble searching a virtual listview in c#.
what i am doing right now is reading a large log file. here is what i have implemented so far
I read the file one line at a time and note the position of the start of the line. Add these positions to a List and when RetrieveVirtualItem is called - look up the position in the file using the index of the item and the List and then read the line from file.
So there is no lag when reading the file.
I want to now search for items. Here is what I have thought of so far, but I have not been able to implement it successfully.
I am not actually searching the listview, but during my filereading, i mark the position of hits of the specific string, say "INFO". if it hits, i add the position to a List.
When RetrieveVirtualItem is called, I just read the line back with all the hits.
Seems that through debugging - if (line.IndexOf("INFO", StringComparison.OrdinalIgnoreCase) >= 0) is not hitting any matches. I'm not sure why, anyone help?
using (var sr = new myStreamReader("test.log"))
{
while ((line = sr.ReadLine()) != null)
{
if (line.IndexOf("INFO", StringComparison.OrdinalIgnoreCase) >= 0)
{
position = sr.BytesRead;
Search.Add(position);
searchcount++;
}
}
newMessageView.VirtualListSize = searchcount;
}

I don't know how your "myScreamReader" class works, but if it similar to StreamReader this code could be working for you:
using (var sr = new StreamReader("test.log"))
{
while (!sr.EndOfStream)
{
string line = sr.ReadLine();
if (line.IndexOf("INFO", StringComparison.OrdinalIgnoreCase) >= 0)
{
// line contains "info"
}
}
}
You should debug your code by setting a breakpoint at line.IndexOf... check to see if value of line is changing and look correct.

Related

Visual Studio Debugger Extension get user settings

I'm writing a visual studio extension based on the Concord Samples Hello World project. The goal is to let the user filter out stack frames by setting a list of search strings. If any of the search strings are in a stack frame, it is omitted.
I've got the filter working for a hardcoded list. That needs to be in a non-package-based dll project in order for the debugger to pick it up. And I have a vsix project that references that dll with an OptionPageGrid to accept the list of strings. But I can't for the life of me find a way to connect them.
On the debugger side, my code looks something like this:
DkmStackWalkFrame[] IDkmCallStackFilter.FilterNextFrame(DkmStackContext stackContext, DkmStackWalkFrame input)
{
if (input == null) // null input frame indicates the end of the call stack. This sample does nothing on end-of-stack.
return null;
if (input.InstructionAddress == null) // error case
return new[] { input };
DkmWorkList workList = DkmWorkList.Create(null);
DkmLanguage language = input.Process.EngineSettings.GetLanguage(new DkmCompilerId());
DkmInspectionContext inspection = DkmInspectionContext.Create(stackContext.InspectionSession, input.RuntimeInstance, input.Thread, 1000,
DkmEvaluationFlags.None, DkmFuncEvalFlags.None, 10, language, null);
string frameName = "";
inspection.GetFrameName(workList, input, DkmVariableInfoFlags.None, result => GotFrameName(result, out frameName));
workList.Execute();
CallstackCollapserDataItem dataItem = CallstackCollapserDataItem.GetInstance(stackContext);
bool omitFrame = false;
foreach (string filterString in dataItem.FilterStrings)
{
if (frameName.Contains(filterString))
{
omitFrame = true;
}
}
The CallstackCollapserDataItem is where I theoretically need to retrieve the strings from user settings. But I don't have access to any services/packages in order to e.g. ask for WritableSettingsStore, like in You've Been Haacked's Example. Nor can I get my OptionPageGrid, like in the MSDN Options Example.
The other thing I tried was based on this StackOverflow question. I overrode the LoadSettingsFromStorage function of my OptionPageGrid and attempted to set a static variable on a public class in the dll project. But if that code existed in the LoadSettingsFromStorage function at all, the settings failed to load without even entering the function. Which felt like voodoo to me. Comment out the line that sets the variable, the breakpoint hits normally, the settings load normally. Restore it, and the function isn't even entered.
I'm at a loss. I really just want to pass a string into my Concord extension, and I really don't care how.
Ok, apparently all I needed to do was post the question here for me to figure out the last little pieces. In my CallstackCollapserDataItem : DkmDataItem class, I added the following code:
private CallstackCollapserDataItem()
{
string registryRoot = DkmGlobalSettings.RegistryRoot;
string propertyPath = "vsix\\CallstackCollapserOptionPageGrid";
string fullKey = "HKEY_CURRENT_USER\\" + registryRoot + "\\ApplicationPrivateSettings\\" + propertyPath;
string savedStringSetting = (string)Registry.GetValue(fullKey, "SearchStrings", "");
string semicolonSeparatedStrings = "";
// The setting resembles "1*System String*Foo;Bar"
if (savedStringSetting != null && savedStringSetting.Length > 0 && savedStringSetting.Split('*').Length == 3)
{
semicolonSeparatedStrings = savedStringSetting.Split('*')[2];
}
}
vsix is the assembly in which CallstackCollapserOptionPageGrid is a DialogPage, and SearchStrings is its public property that's saved out of the options menu.

C# Stream keeps skipping first line

alright I'm doing something that should be rather simple, I believe I am overlooking something here.
Alright I and using a HttpWebRequest and a WebResponse to detect if a Robots.txt exists on a server (and that works perfectly fine). However, I am trying to add to do myList.Add(reader.ReadLine()); Which (works). But problem is, it keeps skipping the very first line.
https://www.assetstore.unity3d.com/robots.txt < That is the one I started noticing the problem on (just so you know what I'm talking about). It is just for testing purposes. (Look at that link so you can get an idea as to what I'm talking about).
Anywho, it is also not adding the reader.ReadLine to my list either (first line only). So I'm not exactly understanding what's going on, I've tried looking this up and the only things I'm finding is to purposely want to skip a line, I don't want to do that.
My Code Below.
Console.WriteLine("Robots.txt Found: Presenting Rules in (Robot Rules).");
HttpWebRequest getResults = (HttpWebRequest)WebRequest.Create(ur + "robots.txt");
WebResponse getResponse = getResults.GetResponse();
using (StreamReader reader = new StreamReader(getResponse.GetResponseStream())) {
string line = reader.ReadLine();
while(line != null && line != "#") {
line = reader.ReadLine();
rslList.Add(line);
results.Text = results.Text + line + Environment.NewLine; // At first I thought it might have been this (nope).
}
// This didn't work either (figured perhaps maybe it was skipping because I had to many things.
// So I just put into a for loop, - nope still skips first line.
// for(int i = 0; i < rslList.Count; i++) {
// results.Text = results.Text + rslList[i] + Environment.NewLine;
// }
}
// Close the connection sense it is no longer needed.
getResponse.Close();
// Now check for user-rights.
CheckUserRights();
Image of the results.
Change when next you call the read line
var line = reader.ReadLine(); //Read first line
while(line != null && line != "#") { //while line condition satisfied
//perform your desired actions
rslList.Add(line);
results.Text = results.Text + line + Environment.NewLine;
line = reader.ReadLine(); //read the next line
}

Bootloader Flow Control C#

I'm working to program a MCU board over RS485. I have the section of code done to access the bootloader no problem. My problem is in this code:
int xon_off = ComPort.ReadChar();
if (xon_off == send_data) {
int counter = 0;
string line;
System.IO.StreamReader file = new System.IO.StreamReader("C:/Users/user/Desktop/x.hex");
while ((line = file.ReadLine()) != " ") // reads until end of file
{
write_line: line = file.ReadLine();
if (xon_off == send_data) {
ComPort.Write(line);
//System.Threading.Thread.Sleep(500);
counter++;
xon_off = ComPort.ReadByte(); // should be x_off
error_check = ComPort.ReadByte(); // will give line complete or error
xon_off = ComPort.ReadByte(); // should be x_on
} else if (xon_off == stop_data) {
read_again: xon_off = ComPort.ReadByte();
if (xon_off == send_data) {
goto write_line;
} else {
goto read_again;
}
}
}
My issue is with the flow control (x_on/x_off/eof/etc). The way the current code is, it can send a page error, and the tool keeps sending like it was nothing, so obviously my read/compare statements are off. Can someone help me find out why when it sends a page error, my code thinks it's sending an x_on?
NOTE: x_on is a variable above set to 0x11 and x_off is a var above set to 0x13 just to clarify.
NOTE: Once I get this figured out, my next step is to remove the goto statements...they're gross I know, but they worked for here.
Ok so from what I can understand, here's what the better option is:
First off, do remove the goto statements, they're horrindious and should never be used. As for the issue of not being able to mix chars/hex values, every char when brought in as an int will be assigned it's hex value (convert to int32 in the program). When the bootloader sends the 0x11, it will more than likely send it as a char, which will come into your software as an unprintable ASCII char, but still have the 0x11 if you use your debugger and see what it's actually coming in as. So my suggestion is to do a readbyte, then do a convert to int32 in software, and do a switch statement/state machine for what you want done.

When using MergeField FieldCodes in OpenXml SDK in C# why do field codes disappear or fragment?

I have been working successfully with the C# OpenXml SDK (Unofficial Microsoft Package 2.5 from NuGet) for some time now, but have recently noticed that the following line of code returns different results depending on what mood Microsoft Word appears to be in when the file gets saved:
var fields = document.Descendants<FieldCode>();
From what I can tell, when creating the document in the first place (using Word 2013 on Windows 8.1) if you use the Insert->QuickParts->Field and choose MergeField from the Field names left hand pane, and then provide a Field name in the field properties and click OK then the field code is correctly saved in the document as I would expect.
Then when using the aforementioned line of code I will receive a field code count of 1 field. If I subsequently edit this document (and even leave this field well alone) the subsequent saving could mean that this field code no longer is returned in my query.
Another case of the same curiousness is when I see the FieldCode nodes split across multiple items. So rather than seeing say:
" MERGEFIELD Author \\* MERGEFORMAT "
As the node name, I will see:
" MERGEFIELD Aut"
"hor \\* MERGEFORMAT"
Split as two FieldCode node values. I have no idea why this would be the case, but it certainly makes my ability to match nodes that much more exciting. Is this expected behaviour? A known bug? I don't really want to have to crack open the raw xml and edit this document to work until I understand what is going on. Many thanks all.
I came across this very problem myself, and found a solution that exists within OpenXML: a utility class called MarkupSimplifier which is part of the PowerTools for Open XML project. Using this class solved all the problems I was having that you describe.
The full article is located here.
Here are some pertinent exercepts :
Perhaps the most useful simplification that this performs is to merge adjacent runs with identical formatting.
It goes on to say:
Open XML applications, including Word, can arbitrarily split runs as necessary. If you, for instance, add a comment to a document, runs will be split at the location of the start and end of the comment. After MarkupSimplifier removes comments, it can merge runs, resulting in simpler markup.
An example of the utility class in use is:
SimplifyMarkupSettings settings = new SimplifyMarkupSettings
{
RemoveComments = true,
RemoveContentControls = true,
RemoveEndAndFootNotes = true,
RemoveFieldCodes = false,
RemoveLastRenderedPageBreak = true,
RemovePermissions = true,
RemoveProof = true,
RemoveRsidInfo = true,
RemoveSmartTags = true,
RemoveSoftHyphens = true,
ReplaceTabsWithSpaces = true,
};
MarkupSimplifier.SimplifyMarkup(wordDoc, settings);
I have used this many times with Word 2010 documents using VS2015 .Net Framework 4.5.2 and it has made my life much, much easier.
Update:
I have revisited this code and have found it clears upon runs on MERGEFIELDS but not IF FIELDS that reference mergefields e.g.
{if {MERGEFIELD When39} = "Y???" "Y" "N" }
I have no idea why this might be so, and examination of the underlying XML offers no hints.
Word will often split text runs with into multiple text runs for no reason I've ever understood. When searching, comparing, tidying etc. We preprocess the body with method which combines multiple runs into a single text run.
/// <summary>
/// Combines the identical runs.
/// </summary>
/// <param name="body">The body.</param>
public static void CombineIdenticalRuns(W.Body body)
{
List<W.Run> runsToRemove = new List<W.Run>();
foreach (W.Paragraph para in body.Descendants<W.Paragraph>())
{
List<W.Run> runs = para.Elements<W.Run>().ToList();
for (int i = runs.Count - 2; i >= 0; i--)
{
W.Text text1 = runs[i].GetFirstChild<W.Text>();
W.Text text2 = runs[i + 1].GetFirstChild<W.Text>();
if (text1 != null && text2 != null)
{
string rPr1 = "";
string rPr2 = "";
if (runs[i].RunProperties != null) rPr1 = runs[i].RunProperties.OuterXml;
if (runs[i + 1].RunProperties != null) rPr2 = runs[i + 1].RunProperties.OuterXml;
if (rPr1 == rPr2)
{
text1.Text += text2.Text;
runsToRemove.Add(runs[i + 1]);
}
}
}
}
foreach (W.Run run in runsToRemove)
{
run.Remove();
}
}
I tried to simplify the document with Powertools but the result was a corrupted word file. I make this routine for simplify only fieldcodes that has specifics names, works in all parts on the docs (maindocumentpart, headers and footers):
internal static void SimplifyFieldCodes(WordprocessingDocument document)
{
var masks = new string[] { Constants.VAR_MASK, Constants.INP_MASK, Constants.TBL_MASK, Constants.IMG_MASK, Constants.GRF_MASK };
SimplifyFieldCodesInElement(document.MainDocumentPart.RootElement, masks);
foreach (var headerPart in document.MainDocumentPart.HeaderParts)
{
SimplifyFieldCodesInElement(headerPart.Header, masks);
}
foreach (var footerPart in document.MainDocumentPart.FooterParts)
{
SimplifyFieldCodesInElement(footerPart.Footer, masks);
}
}
internal static void SimplifyFieldCodesInElement(OpenXmlElement element, string[] regexpMasks)
{
foreach (var run in element.Descendants<Run>()
.Select(item => (Run)item)
.ToList())
{
var fieldChar = run.Descendants<FieldChar>().FirstOrDefault();
if (fieldChar != null && fieldChar.FieldCharType == FieldCharValues.Begin)
{
string fieldContent = "";
List<Run> runsInFieldCode = new List<Run>();
var currentRun = run.NextSibling();
while ((currentRun is Run) && currentRun.Descendants<FieldCode>().FirstOrDefault() != null)
{
var currentRunFieldCode = currentRun.Descendants<FieldCode>().FirstOrDefault();
fieldContent += currentRunFieldCode.InnerText;
runsInFieldCode.Add((Run)currentRun);
currentRun = currentRun.NextSibling();
}
// If there is more than one Run for the FieldCode, and is one we must change, set the complete text in the first Run and remove the rest
if (runsInFieldCode.Count > 1)
{
// Check fielcode to know it's one that we must simplify (for not to change TOC, PAGEREF, etc.)
bool applyTransform = false;
foreach (string regexpMask in regexpMasks)
{
Regex regex = new Regex(regexpMask);
Match match = regex.Match(fieldContent);
if (match.Success)
{
applyTransform = true;
break;
}
}
if (applyTransform)
{
var currentRunFieldCode = runsInFieldCode[0].Descendants<FieldCode>().FirstOrDefault();
currentRunFieldCode.Text = fieldContent;
runsInFieldCode.RemoveAt(0);
foreach (Run runToRemove in runsInFieldCode)
{
runToRemove.Remove();
}
}
}
}
}
}
Hope this helps!!!

Retrieve checked Items in checkedListBox from text file

I have a text file with one word per line which represents the checkedListBox I have checked previously. Now when the application is re-run I want the checkedListBox items to already be checked, I've tried:
System.IO.StreamReader file = new System.IO.StreamReader(#"checked.txt");
foreach (var checked in file.ReadLine())
{
lstCheckBox.SetItemChecked(checked, true);
}
This doesn't seem to work, whilst debugging the application crashes, any ideas where I'm going wrong?
Error:
InvalidArgument=Value of '97' is not valid for 'index'.
Parameter name: index
FIXED
foreach (var checked in File.ReadAllLines(#"checked.txt"))
{
int index = lstCheckBox.Items.IndexOf(checked);
if (index > 0)
{
lstCheckBox.SetItemChecked(index, true);
}
}
This is because ReadLine returns a single line, and you're iterating the characters in the line.
string line;
while ((line = file.ReadLine()) != null)
{
var index = int.Parse(line);
lstCheckBox.SetItemChecked(checked, true);
}
Should fix the problem.
Alternatively, you could use the following code instead (not using StreamReader).
foreach (var line in File.ReadAllLines("checked.txt"))
{
var index = int.Parse(line);
lstCheckBox.SetItemChecked(checked, true);
}

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