Develop Reference

Delete file which cannot delete because is used by another process

I know you are going to tell me that this question is stupid but I really cannot find a solution to delete my file.
In fact, I open a connection to an .add file (same style as SQL in a way) but afterwards I cannot delete it because it is used by another process which is the process of my application.
While doing some research on the internet I was able to find the solution to kill the process however if I do this it stops my application. Then I also found the GC collect but it doesn't work : /
There is my code :
try
{
string idClient = "parfilux";
string tableName = "ACT,ACF";
string dataSourceDBF = "C:/winbooks/data/parfilux";
string path = dataSourceDBF ;
string pathTemp = dataSourceDBF + "/CopyTempWebService/";
if (!Directory.Exists(pathTemp)) Directory.CreateDirectory(pathTemp);
string addFile = path + "/" + idClient + ".add";
File.Copy(addFile, pathTemp + idClient.ToUpper() + ".add");
File.Copy(addFile.Replace(".add", ".ai"), pathTemp + "/" + idClient.ToUpper() + ".ai");
File.Copy(addFile.Replace(".add", ".am"), pathTemp + "/" + idClient.ToUpper() + ".am");
tableName = tableName.Replace(" ", "");
string[] tables = tableName.Split(',');
string pathTable = null;
foreach (string tab in tables)
{
pathTable = path + "/" + idClient.ToUpper() + "_" + tab.ToUpper() + ".dbf";
File.Copy(pathTable, pathTemp + idClient.ToUpper() + "_" + tab.ToUpper() + ".dbf");
File.Copy(pathTable.Replace(".dbf", ".cdx"), pathTemp + idClient.ToUpper() + "_" + tab.ToUpper() + ".cdx");
}
AdsConnection dbfCo;
//dbfCo.Close();
dbfCo = new AdsConnection(#"data Source=" + dataSourceDBF + "/CopyTempWebService/" + idClient + ".add;User ID=admin;Password=;ServerType=Local;ReadOnly=true;pooling=true;TrimTrailingSpaces=true;ShowDeleted=TRUE;TableType=CDX;LockMode=COMPATIBLE");
dbfCo.Open();
//QueryDataDBF(tableName, idClient, false);
dbfCo.Close();
dbfCo.Dispose();
//Process process = Process.GetCurrentProcess();
//Console.WriteLine(process.MainModule);
//process.Kill();
//foreach(Process pro in process)
//{
// Console.WriteLine(pro);
// if(pro.ProcessName == pathTemp + idClient.ToUpper() + ".add")
// {
// pro.Kill();
// }
//}
//System.GC.Collect();
//System.GC.WaitForPendingFinalizers();
//File.Delete(pathTemp + idClient.ToUpper() + ".add");
Directory.Delete(dataSourceDBF + "/CopyTempWebService", true);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
I open a connection to my .add with the Advantage Data Provider library.
Do you have any idea to fix this problem ? thank you in advance ;)

Problem with C# File IO in Winforms

I'm having issues with a C# Winforms file IO. The code complies just fine, but then it returns errors on execution.
The output code is here:
private void saveData()
{
string fullPath = System.Environment.GetEnvironmentVariable(#"%MyDocuments%\HellsingRPG\");
StreamWriter writer = new StreamWriter(fullPath + textBox2.Text + ".txt");
writer.WriteLine(textBox1.Text + "," + textBox2.Text + "," + textBox3.Text + "," + textBox4.Text + "," + comboBox1.SelectedText + "," +
numericUpDown25.Value + "," + numericUpDown1.Value + "," + numericUpDown2.Value + "," + numericUpDown3.Value + "," + numericUpDown4.Value + "," +
numericUpDown5.Value + "," + numericUpDown6.Value + "," + numericUpDown7.Value + "," + numericUpDown8.Value + "," + numericUpDown9.Value + "," +
numericUpDown10.Value + "," + numericUpDown11.Value + "," + numericUpDown12.Value + "," + numericUpDown13.Value + "," + numericUpDown14.Value
+ "," + numericUpDown15.Value + "," + numericUpDown16.Value + "," + numericUpDown17.Value + "," + numericUpDown18.Value + "," +
numericUpDown19.Value + "," + numericUpDown20.Value + "," + numericUpDown21.Value + "," + numericUpDown22.Value);
writer.Close();
}
And the code to load the data is here:
private void loadData()
{
Stream myStream = null;
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.InitialDirectory = System.Environment.GetEnvironmentVariable(#"%MyDocuments%\HellsingRPG\");
openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
openFileDialog1.FilterIndex = 2;
openFileDialog1.RestoreDirectory = true;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
try
{
if ((myStream = openFileDialog1.OpenFile()) != null)
{
using (myStream)
{
List<string> myData = parseCSV(System.Convert.ToString(myStream));
textBox1.Text = myData[0];
textBox2.Text = myData[1];
textBox3.Text = myData[3];
textBox4.Text = myData[4];
comboBox1.SelectedText = myData[5];
numericUpDown25.Value = System.Convert.ToDecimal(myData[6]);
numericUpDown1.Value = System.Convert.ToDecimal(myData[7]);
numericUpDown2.Value = System.Convert.ToDecimal(myData[8]);
numericUpDown3.Value = System.Convert.ToDecimal(myData[9]);
numericUpDown4.Value = System.Convert.ToDecimal(myData[10]);
numericUpDown5.Value = System.Convert.ToDecimal(myData[11]);
numericUpDown6.Value = System.Convert.ToDecimal(myData[12]);
numericUpDown7.Value = System.Convert.ToDecimal(myData[13]);
numericUpDown8.Value = System.Convert.ToDecimal(myData[14]);
numericUpDown9.Value = System.Convert.ToDecimal(myData[15]);
numericUpDown10.Value = System.Convert.ToDecimal(myData[16]);
numericUpDown11.Value = System.Convert.ToDecimal(myData[17]);
numericUpDown12.Value = System.Convert.ToDecimal(myData[18]);
numericUpDown13.Value = System.Convert.ToDecimal(myData[19]);
numericUpDown14.Value = System.Convert.ToDecimal(myData[20]);
numericUpDown15.Value = System.Convert.ToDecimal(myData[21]);
numericUpDown16.Value = System.Convert.ToDecimal(myData[22]);
numericUpDown17.Value = System.Convert.ToDecimal(myData[23]);
numericUpDown18.Value = System.Convert.ToDecimal(myData[24]);
numericUpDown19.Value = System.Convert.ToDecimal(myData[25]);
numericUpDown20.Value = System.Convert.ToDecimal(myData[26]);
numericUpDown21.Value = System.Convert.ToDecimal(myData[27]);
numericUpDown22.Value = System.Convert.ToDecimal(myData[28]);
}
}
}
catch (Exception ex)
{
MessageBox.Show("Error: Could not read file from disk. Original error: " + ex.Message);
}
}
}
And that compiles just fine. But when I use it, I get the following errors:
"Could not find file "C:\Users\collmark\Documents\Visual Studio
2015\Projects\WindowsFormsApplication1\WindowsFormsApplication1\bin\Release\System.IO.Filestream".
"Error: Could not read file from disk. Original error: Index out of
range. Must be non-negative and less than the size of the collection.
Parameter name: index."
Thanks

your save data seems to save 22 fields while the read expects 28.
I suspect the myData object does not contain the fields index you are trying to read, hence index out of range.
do yourself a favour when printing exception data don't limit yourself to the message but print the whole stack trace, it will tell you which line is faulty giving you a hint at the actual problem.
MessageBox.Show("Error: Could not read file from disk. Original error: " + ex.ToString());

Create a dropdownlist of checkboxes using EPPlus

I am using EPPlus (http://epplus.codeplex.com/) to create Excel files in my ASP.NET application. I was wondering if anyone knows if it's possible to create a dropdownlist with checkboxes in one cell. I've checked the documentation, but found nothing so far. I've also tried Googling it but haven't found anything in the right direction yet.
This question on their forum is actually a pretty good demonstration of what I'm looking for, but it hasn't received any answers: http://epplus.codeplex.com/discussions/585879
Does anyone happen to have any ideas and can point me in the right direction?

You can use:
var validationCell = sheet.DataValidations.AddListValidation("A1");
validationCell.Formula.Values.Add("a");
validationCell.Formula.Values.Add("b");
validationCell.Formula.Values.Add("c");
...
but you can choose only one single value. I think that multiple values are not supported by excel.

For others reference, here is how I could enable multiple values select:
By inserting VBA Code:
see how to do it in here , using EPPlus you can insert VBA code using something like:
package.Workbook.CreateVBAProject();
worksheet.CodeModule.Code = code;
This following code did the trick:
using (var package = new ExcelPackage(new System.IO.FileInfo("D:\\b.xlsm")))
{
ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("11");
var validationCell = worksheet.DataValidations.AddListValidation("A1");
validationCell.Formula.Values.Add("a");
validationCell.Formula.Values.Add("b");
validationCell.Formula.Values.Add("c");
string code = "Private Sub Worksheet_Change(ByVal Target As Range)\n" +
"Dim Oldvalue As String\n" +
"Dim Newvalue As String\n" +
"Application.EnableEvents = True\n" +
"On Error GoTo Exitsub\n" +
"If Target.Address = \"$A$1\" Then\n" +
" If Target.SpecialCells(xlCellTypeAllValidation) Is Nothing Then\n" +
" GoTo Exitsub\n" +
"Else: If Target.Value = \"\" Then GoTo Exitsub Else\n" +
" Application.EnableEvents = False\n" +
"Newvalue = Target.Value\n" +
"Application.Undo\n" +
"Oldvalue = Target.Value\n" +
" If Oldvalue = \"\" Then\n" +
" Target.Value = Newvalue\n" +
"Else\n" +
" If InStr(1, Oldvalue, Newvalue) = 0 Then\n" +
" Target.Value = Oldvalue & \", \" & Newvalue\n" +
"Else: \n" +
" Target.Value = Oldvalue\n" +
"End If\n" +
"End If\n" +
"End If\n" +
"End If\n" +
"Application.EnableEvents = True\n" +
"Exitsub: \n" +
" Application.EnableEvents = True\n" +
"End Sub";
package.Workbook.CreateVBAProject();
worksheet.CodeModule.Code = code;
package.Save();
}

Write to CSV and correct displaying in Excel 2010-2012

Help me please write every value to different cell, I try to write data in the CSV file but when I open this file in Excel the value showing in one line (cell). Did different various separators between the values "." and ",". But the results in Office 2010 and 2012 the same... And one more interesting think, in Office 2007 that work's with (*.xls)...
string s = "";
s += "Nick-Name, Category, Web-Pages, ICQ, Skype, Mail, Phone\r";
for (int i = 0; i < listOfUsers.Count; i+=3)
{
s += nickName[i] + "," + category[i] + "," + webList[i] + "," + ICQList[i] + "," + skypeList[i] + "," + mailList[i] + "," + phoneList[i] + ";\r";
}
System.IO.File.WriteAllText(#"" + folder + "Parse_people_list.csv", s, System.Text.Encoding.UTF8);
(source: pixs.ru)
(source: pixs.ru)

Try delimiting with tabs instead - Excel handles tab-delimited data better than comma-delimited since commas within the data may cause issues.
You can also use StringBuilder.AppendLine to improve performance and avoid adding line breaks manually:
StringBuilder s = new StringBuilder();
s.AppendLine("Nick-Name\tCategory\tWeb-Pages\tICQ\tSkype\tMail\tPhone");
for (int i = 0; i < listOfUsers.Count; i+=3)
{
s.AppendLine(
nickName[i] + "\t"
+ category[i] + "\t"
+ webList[i] + "\t"
+ ICQList[i] + "\t"
+ skypeList[i] + "\t"
+ mailList[i] + "\t"
+ phoneList[i]);;
}

How to convert a HTML File to PDF using WkHTMLToSharp / wkhtmltopdf with Images in C#

I am generating HTML files on the fly, and I would like to create a PDF from the final file. I am using the following to generate the HTML file:
public static void WriteHTML(string cFile, List<Movie> mList)
{
int lineID = 0;
string strHeader, strMovie, strGenre, tmpGenre = null;
string strPDF = null;
// initiates streamwriter for catalog output file
FileStream fs = new FileStream(cFile, FileMode.Create);
StreamWriter catalog = new StreamWriter(fs);
strHeader = "<style type=\"text/css\">\r\n" + "<!--\r\n" + "tr#odd {\r\n" + " background-color:#e2e2e2;\r\n" + " vertical-align:top;\r\n" + "}\r\n" + "\r\n" + "tr#even {\r\n" + " vertical-align:top;\r\n" + "}\r\n" + "div#title {\r\n" + " font-size:16px;\r\n" + " font-weight:bold;\r\n" + "}\r\n" + "\r\n" + "div#mpaa {\r\n" + " font-size:10px;\r\n" + "}\r\n" + "\r\n" + "div#genre {\r\n" + " font-size:12px;\r\n" + " font-style:italic;\r\n" + "}\r\n" + "\r\n" + "div#plot {\r\n" + " height: 63px;\r\n" + " font-size:12px;\r\n" + " overflow:hidden;\r\n" + "}\r\n" + "-->\r\n" + "</style>\r\n" + "\r\n" + "<html>\r\n" + " <body>\r\n" + " <table>\r\n";
catalog.WriteLine(strHeader);
strPDF = strHeader;
foreach (Movie m in mList)
{
tmpGenre = null;
strMovie = lineID == 0 ? " <tr id=\"odd\" style=\"page-break-inside:avoid\">\r\n" : " <tr id=\"even\" style=\"page-break-inside:avoid\">\r\n";
catalog.WriteLine(strMovie);
strPDF += strMovie;
foreach (string genre in m.Genres)
tmpGenre += ", " + genre + "";
strGenre = tmpGenre != null ? tmpGenre.Substring(2) : null;
strMovie = " <td>\r\n" + " <img src=\".\\images\\" + m.ImageFile + "\" width=\"75\" height=\"110\">\r\n" + " </td>\r\n" + " <td>\r\n" + " <div id=\"title\">" + m.Title + "</div>\r\n" + " <div id=\"mpaa\">" + m.Certification + " " + m.MPAA + "</div>\r\n" + " <div id=\"genre\">" + strGenre + "</div>\r\n" + " <div id=\"plot\">" + m.Plot + "</div>\r\n" + " </td>\r\n" + " </tr>\r\n";
catalog.WriteLine(strMovie);
strPDF += strMovie;
lineID = lineID == 0 ? 1 : 0;
}
string closingHTML = " </table>\r\n" + " </body>\r\n" + "</html>";
catalog.WriteLine(closingHTML);
strPDF += closingHTML;
WritePDF(strPDF, cFile + ".PDF");
catalog.Close();
}
Once completed, I want to call the following function to generate the PDF file:
public static void WritePDF(string cFile, string pdfFile)
{
WkHtmlToPdfConverter w = new WkHtmlToPdfConverter();
byte[] strHTML = w.Convert(cFile);
File.WriteAllBytes(pdfFile, strHTML);
w.Dispose();
}
I've discovered that the .Convert function will convert HTML code to PDF, not a file. Secondly, when I pass in the HTML code directly, the images are not appearing in the PDF. I know there is an issue with .GIF files, but these are all .JPG files.
I've read a lot about how good wkhtmltopdf is, and the guy who wrote WkHTMLToSharp posted his project all over SO, but I've been disappointed by the lack of documentation for it.
I WANT to be able to pass in a file to convert, change the margins (I know this is possible, I just need to figure out the correct settings), have it convert images correctly, and most importantly, to not break up my items across multiple pages (support "page-break-inside:avoid" or something similar).
I'd love to see how others are using this!

I have coded an example about how to create a PDF from HTML. I just updated it to also print images.
https://github.com/hmadrigal/playground-dotnet/tree/master/MsDotNet.PdfGeneration
(In my blog post I explain most of the project https://hmadrigal.wordpress.com/2015/10/16/creating-pdf-reports-from-html-using-dotliquid-markup-for-templates-and-wkhtmltoxsharp-for-printing-pdf/ )
Pretty much you have two options:
1: Using file:// and the fullpath to the file.
<img alt="profile" src="{{ employee.PorfileFileName | Prepend: "Assets\ProfileImage\" | ToLocalPath }}" />
2: Using URL Data (https://en.wikipedia.org/wiki/Data_URI_scheme)
<img alt="profile" src="data:image/png;base64,{{ employee.PorfileFileName | Prepend: "Assets\ProfileImage\" | ToLocalPath | ToBase64 }}" />
Cheers,
Herb

Use WkHtmlToXSharp.
Download the latest DLL from Github
public static string ConvertHTMLtoPDF(string htmlFullPath, string pageSize, string orientation)
{
string pdfUrl = htmlFullPath.Replace(".html", ".pdf");
try
{
#region USING WkHtmlToXSharp.dll
//IHtmlToPdfConverter converter = new WkHtmlToPdfConverter();
IHtmlToPdfConverter converter = new MultiplexingConverter();
converter.GlobalSettings.Margin.Top = "0cm";
converter.GlobalSettings.Margin.Bottom = "0cm";
converter.GlobalSettings.Margin.Left = "0cm";
converter.GlobalSettings.Margin.Right = "0cm";
converter.GlobalSettings.Orientation = (PdfOrientation)Enum.Parse(typeof(PdfOrientation), orientation);
if (!string.IsNullOrEmpty(pageSize))
converter.GlobalSettings.Size.PageSize = (PdfPageSize)Enum.Parse(typeof(PdfPageSize), pageSize);
converter.ObjectSettings.Page = htmlFullPath;
converter.ObjectSettings.Web.EnablePlugins = true;
converter.ObjectSettings.Web.EnableJavascript = true;
converter.ObjectSettings.Web.Background = true;
converter.ObjectSettings.Web.LoadImages = true;
converter.ObjectSettings.Load.LoadErrorHandling = LoadErrorHandlingType.ignore;
Byte[] bufferPDF = converter.Convert();
System.IO.File.WriteAllBytes(pdfUrl, bufferPDF);
converter.Dispose();
#endregion
}
catch (Exception ex)
{
throw new Exception(ex.Message, ex);
}
return pdfUrl;
}

You can use Spire.Pdf to do so.
This component could convert html to pdf.
PdfDocument pdfdoc = new PdfDocument();
pdfdoc.LoadFromHTML(fileFullName, true, true, true);
//String url = "http://www.e-iceblue.com/";
//pdfdoc.LoadFromHTML(url, false, true, true);
pdfdoc.SaveToFile("FromHTML.pdf");

We're also using wkhtmltopdf and are able to render images correctly. However, by default the rendering of images is disabled.
You have to specify those options on your converter instance:
var wk = _GetConverter()
wk.GlobalSettings.Margin.Top = "20mm";
wk.GlobalSettings.Margin.Bottom = "10mm";
wk.GlobalSettings.Margin.Left = "10mm";
wk.GlobalSettings.Margin.Right = "10mm";
wk.GlobalSettings.Size.PaperSize = PdfPaperSize.A4;
wk.ObjectSettings.Web.PrintMediaType = true;
wk.ObjectSettings.Web.LoadImages = true;
wk.ObjectSettings.Web.EnablePlugins = false;
wk.ObjectSettings.Web.EnableJavascript = true;
result = wk.Convert(htmlContent);