Hi,

what do I have to consider, if I want to execute a .NET 4.7 application on a Mono system?

Best regards,
Christian

Newbie (3rd week of learning c#)

I have a form with a datagridview, and the user selects a single record.

In the ok_onclick function(method?) of the first form, I execute a query based on selection and place the entire row into a datatable. I can see the data so I know the query was successful.

Now I need to open a second form and populate the textboxes on it with the contents of the datatable created by the ok_onclick function on the previous form.

It appears I must add something in the second form's code in order to assign the datatable's values to each textbox.. but what and where?

I am running into trouble with this program. For some reason I am getting an Index out of bounds error

I am not sure why. It was written in C#. Suggestions would be nice. 

 NOTE. the file is a .CSV. and var L is one outlined box.

lines is defined as follows...

string line = string.Empty;
            List<string[]> lines = new List<string[]>();

            if(args.Length < 1) while((line = Console.ReadLine()) != null) lines.Add(line.Split(','));
            else {
                foreach(var l in File.ReadAllLines(args[0])) {
                    lines.Add(l.Split(','));
                }
            }

The line I am having trouble with is 

int.Parse(lines[2][2].Replace("bpm", string.Empty))

 public static void Main(string[] args) {
            string line = string.Empty;
            List<string[]> lines = new List<string[]>();

            if(args.Length < 1) while((line = Console.ReadLine()) != null) lines.Add(line.Split(','));
            else {
                foreach(var l in File.ReadAllLines(args[0])) {
                    lines.Add(l.Split(','));
                }
            }
            //Console.WriteLine(args[0]);Console.ReadLine();return;
            quarterNoteBPM = int.Parse(lines[2][2].Replace("bpm", string.Empty));
            int firstNoteLineID = getFirstNoteIndex(lines);
            // skip the header and go directly to the notes
            var linesWithNotes = lines.Skip(firstNoteLineID).ToList();
            //Console.WriteLine(lines[0][1]);
            //Console.ReadLine();
            //return;
            var sb = new StringBuilder();
            sb.Append(header);
            var linesID = 0;
            int failsafe = 0;
            //Console.WriteLine(args[0]);Console.ReadLine();
            for(int loopID = 0; linesID < linesWithNotes.Count; loopID++) {
                failsafe++; if(failsafe > 100) break;
                if(loopID == 64) {
                    loopID = 0;
                    patternCount++;
                    sb.Append(patternTitle.Replace("XX", patternCount.ToString("X").PadLeft(2, '0')));
                }

Hi all, (apologies if this is in the wrong section)

I am trying to read and write to an excel spreadsheet in c#. I want to put a web form on the front-end that will allow the user to read and write to the spreadsheet.

This is a good tutorial i found: http://davidhayden.com/blog/dave/archive/2006/05/26/2973.aspx

Though i don't know where abouts to put the code.

Any help, any working examples please ?

Thanks in advance.

I'm trying to make an object to follow my mouse I think I'm doing good but I have a little problem 

public void main()
        {
            try
            {
                // main loop ,drawing from first point to the mouse 
                rX = MousePosition.X; rY = MousePosition.Y;


                Graphics graphicsObj;

                graphicsObj = this.CreateGraphics();
                Pen myPen = new Pen(Color.BlueViolet, 3);

                Point point = new Point(mX, mY);

                Rectangle myRectangle = new Rectangle(X, Convert.ToInt16(Y), 50, 50);
                graphicsObj.Clear(Color.White);

                mX = myRectangle.X;
                mY = myRectangle.Y;
                Y = (X - mX) * ((mY - rY) / (mX - rX)) + mY;

                graphicsObj.DrawEllipse(myPen, myRectangle);

                //myRectangle.Location = new Point(X, (X - mX) * ((mY - rY) / (mX - rX)) + mY);
                label1.Text = "( " + X + " , " + Y + " )" + "( " + rX + " , " + rY + " )";
            }
            catch
            {

            }
            finally
            {

            }
            
            
        }

when I tried to find out why the ellipse didn't move in Y-axis I found that Y always zero, can anyone tell me why its equal zero, I have tried the equation many times in paper and it is true but I don't know why it is zero

so I made a small P2P Program using TCP, and when I send large files, receiver end gets corrupted data, don't know what I can do to fix, I've been coding since 2015 but haven't really got back fully into it, still know how to code, just a little rusty right now.

here's my code

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;

namespace FileBucket.Service {

    class SendFileService {

        public FileProgressEventHandler FileSendProgress;
        public FileSharedCompleteEventHandler FileSendComplete;
        public ConnectEventHandler Connect;

        public static int bufferSize = 4096;
        TcpClient client;
        private Task task = null;

        public String FilePath { get; set; }

        public long FileSize { get; private set; }

        public SendFileService(String filePath) {
            FilePath = filePath;
            FileSize = new FileInfo(filePath).Length;

            //Linstener for validation
            Task.Run(() => {
                TcpListener listener = new TcpListener(4975);
                listener.Start();
            });
        }

        public void StartListening() {
            Task.Run(() => {
                if (Connect != null) Connect(Connection.Connecting);
                client = FileShareService.GetNewClient();
                if (Connect != null) Connect(Connection.Successful);
            });
        }

        public void SendFileAsync() {
            task = Task.Run(() => {
                sendFile();
            });
        }

        private void sendFile() {
            using (Stream stream = client.GetStream()) {
                //Send file size
                FileInfo fileInfo = new FileInfo(FilePath);
                int fileSize = (int) fileInfo.Length;
                byte[] fileSizeBytes = BitConverter.GetBytes(fileSize);
                stream.Write(fileSizeBytes, 0, 4);

                //Send file name
                byte[] fileNamebytes = Encoding.ASCII.GetBytes(fileInfo.Name);
                fileSizeBytes = BitConverter.GetBytes(fileNamebytes.Length);
                stream.Write(fileSizeBytes, 0, 4);
                stream.Write(fileNamebytes, 0, fileNamebytes.Length);

                using (FileStream fileStream = new FileStream(FilePath, FileMode.Open)) {
                    //int count = (int)(fileSize / bufferSize);
                    //int rest = (int)(fileSize % bufferSize);

                    //byte[] fileBytes = new byte[bufferSize];
                    //if (FileSendProgress == null) {
                    //    for (int i = 0; i < count; i++) {
                    //        fileStream.Read(fileBytes, 0, bufferSize);
                    //        System.Threading.Thread.Sleep(10);
                    //        stream.Write(fileBytes, 0, bufferSize);
                    //    }
                    //} else {
                    //    for (int i = 0; i < count;) {
                    //        fileStream.Read(fileBytes, 0, bufferSize);
                    //        System.Threading.Thread.Sleep(10);
                    //        stream.Write(fileBytes, 0, bufferSize);
                    //        i++;
                    //        FileSendProgress(i / (double)count);
                    //    }
                    //}

                    ////Rest Bytes
                    //fileBytes = new byte[rest];
                    //fileStream.Read(fileBytes, 0, rest);
                    //stream.Write(fileBytes, 0, rest);


                    #region
                    byte[] fileBytes = new byte[fileSize];
                    fileStream.Read(fileBytes, 0, fileSize);
                    stream.Write(fileBytes, 0, fileSize);

                    if (FileSendProgress != null) FileSendProgress(1);
                    #endregion
                }
            }

            //File send competed
            if (FileSendComplete != null) FileSendComplete();
            client.Close();
        }

        public void CancelSending() {
            client.Close();
        }
    }
}

-------

these are split into "services"

-----

using

System

;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;

namespace FileBucket.Service {
    class ReceiveFileService {

        public FileProgressEventHandler FileReceiveProgress;
        public FileSharedCompleteEventHandler FileReceivedComplete;
        public ConnectEventHandler Connect;
        TcpClient client;

        public static int bufferSize = 4096;
        public String FilePath { get; set; }

        public long FileSize { get; private set; }

        public String HostName { get; set; }

        public bool IsValidHostName() {
            try {
                TcpClient client = new TcpClient(HostName, 4975);
                client.Close();
            } catch (Exception e) {
                return false;
            }
            return true;
        }

        public void ReceiveFileAsync() {
            Task.Run(() => {
                ReceiveFile();
            });
        }

        public void GetFileInfo() {
            client = new TcpClient(HostName, config.Configuration.PORT);
            Stream stream = client.GetStream();
                //Receive file size
                byte[] fileSizeBytes = new byte[4];
                stream.Read(fileSizeBytes, 0, 4);
                int fileSize = BitConverter.ToInt32(fileSizeBytes, 0);
                FileSize = fileSize;

                //Receive File name
                stream.Read(fileSizeBytes, 0, 4);
                int fileNameLen = BitConverter.ToInt32(fileSizeBytes, 0);
                byte[] fileNamebytes = new byte[fileNameLen];
                stream.Read(fileNamebytes, 0, fileNameLen);
                string fileName = Encoding.ASCII.GetString(fileNamebytes);
                FilePath = fileName;

        }

        private void ReceiveFile() {
            using (Stream stream = client.GetStream()) {
                if (Connect != null) Connect(Connection.Successful);

                using (FileStream fileStream = new FileStream(FilePath, FileMode.Create)) {
                    //int count = (int)(fileSize / bufferSize);
                    //int rest = (int)(fileSize % bufferSize);

                    //byte[] fileBytes = new byte[bufferSize];
                    ////TODO hard code replace this
                    //FilePath = "D:\\downloaded_image.jpg";

                    //if (FileReceiveProgress == null) {
                    //    for (int i = 0; i < count; i++) {
                    //        stream.Read(fileBytes, 0, bufferSize);
                    //        System.Threading.Thread.Sleep(10);
                    //        fileStream.Write(fileBytes, 0, bufferSize);
                    //    }
                    //} else {
                    //    for (int i = 0; i < count;) {
                    //        stream.Read(fileBytes, 0, bufferSize);
                    //        System.Threading.Thread.Sleep(10);
                    //        fileStream.Write(fileBytes, 0, bufferSize);
                    //        i++;
                    //        FileReceiveProgress(i / (double)count);
                    //    }
                    //}

                    ////Rest Bytes
                    //fileBytes = new byte[rest];
                    //stream.Read(fileBytes, 0, rest);
                    //fileStream.Write(fileBytes, 0, rest);
                    //if (FileReceiveProgress != null) FileReceiveProgress(1);

                    #region
                    int fileSize = (int)FileSize;
                    byte[] fileBytes = new byte[fileSize];
                    stream.Read(fileBytes, 0, fileSize);
                    fileStream.Write(fileBytes, 0, fileSize);
                    if (FileReceiveProgress != null) FileReceiveProgress(1);
                    #endregion
                }
            }

            //File received complete
            if (FileReceivedComplete != null) FileReceivedComplete();
        }
    }
}

------

I got an app that updates a chart with real time data, now i want to be able to add a "tag" to some points, the data comes from serial port, it was working fine and sudently, without me changing configuration from the chart (as far as i can remember) the tags stopped showing, i can see that the tag is added because the chart changes its form to include the tag (the graph moves up to make room for the text) but i can't see the text.

it used to work, and i've even tried adding just a generic string to the graph, still makes the room for it but i can't see the tag, here's what i'm using:

     chart1.Series["Series1"].Points.AddXY(tag, data);

     chart1.chartAreas[0],AxisX.ScaleView.Position = chart1.Series["Series1"].Points.Count - 500;

my best guess is that some configuration from the graph was changed.

thanks in advance for any help

I am struggling last few days to print data table value in particular excel column.

I have the master table with data.

When i print master table data to excel, there is a condition to swap the column based on the reference table data
and print.

step1 
-----
Read the master table. screen shot below




step2
-----
While printing the data into excel, first refer the column as mentioned below and swap the column and then print




step3
-----
Final Output in the excel after swaping the columns.

Note : pls. note down the master table and output in excel, there will be swaping the columns.
since the column has been refrenced.

My Source Code :

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Excel = Microsoft.Office.Interop.Excel;
using Microsoft.Office;

namespace WinForm
{
    public partial class Form1 : Form
    {
        public string country = string.Empty;
        public Excel.Application xlApp = null;
        public Excel.Workbook XLWB = null;
        public Excel.Worksheet wsht = null;
        int IdxCurr = 0;
        int IdxPrev = 0;
        string colLineNoToPrint;

        public Form1()
        {
            InitializeComponent();
          
        }

        private void button1_Click(object sender, EventArgs e)
        {
            country = comboBox1.SelectedItem.ToString();
            DataTable boundTable = new DataTable();
            DataTable dtRefColumn = RefColumn();
            if (!string.IsNullOrEmpty(country))
            {

                IEnumerable<DataRow> query = from customer in dtRefColumn.AsEnumerable()
                                where customer.Field<string>("Country_Name") == country
                                select customer;

                boundTable = query.CopyToDataTable<DataRow>();
            }
            else
            {

            }

            DataTable dtMaster = dtMasterData();

            //print data to output template according to reference column
            SaveToExcel(dtMaster, dtRefColumn, country);

         
        }

        public void SaveToExcel(DataTable dtMaster, DataTable dtReftable, string country)
        {
            xlApp = new Excel.Application();
            xlApp.Workbooks.Add(true);
            wsht = xlApp.Worksheets.Add();
            wsht.Name = "S2";

            if (dtMaster.Rows.Count > 0)
            {
                for (int i = 0; i < dtMaster.Rows.Count; i++)
                {

                         //************* Struggling to print rows from here ****************
                         DataView dv = new DataView(dtMaster);

                         DataTable dt = dv.ToTable(true, dtMaster.Columns[i].ToString());

                        //Get Column Name
                        string colname = dtMaster.Columns[i].ToString();
                        //Get Reference column 
                        string RefCol = (dtReftable.AsEnumerable().Where(p => p.Field<string>("Country_Name") == country && p.Field<string>("Column_Name") == colname).Select(p => p.Field<string>("Excel_column"))).FirstOrDefault();
                        int TotRows = dtMaster.Rows.Count;
                        TotRows = 12 + TotRows;

                       
                       //To Print : Excel rows Should start to print from Rows 10
                        wsht.Cells[i][10] = dt.Rows[i].ToString();
                       //************* Struggling to print rows from here ****************
                  
                }
            }
            xlApp.Visible = true;
            xlApp.ActiveWorkbook.SaveAs(@"C:\Users\CompUMZ1A\Desktop\test.xlsx");
            xlApp.Quit();
        }

        public static DataTable dtMasterData()
        {

                DataTable tblData = new DataTable();
                tblData.Columns.Add("Prod_ID", typeof(string));
                tblData.Columns.Add("Prod_Name", typeof(string));
                tblData.Columns.Add("Prod_Quantity", typeof(string));
                tblData.Columns.Add("Prod_Expiry", typeof(string));
                tblData.Columns.Add("Prod_Manf_Date", typeof(string));
                tblData.Columns.Add("Prod_Region", typeof(string));
                tblData.Columns.Add("Prod_Head", typeof(string));
                tblData.Rows.Add("2020-1A", "Horlicks", "5000", "10-Jun-20", "05-Jan-20", "NewYork", "Sharuk");
                tblData.Rows.Add("2020-1B", "VIVA", "2000", "10-Jun-20", "05-Jan-20", "California", "Amit");
                tblData.Rows.Add("2020-1C", "Complan", "30000", "10-Jun-20", "05-Jan-20", "Mexico", "John");
                tblData.Rows.Add("2020-1D", "Bournvita", "10000", "10-Jun-20", "05-Jan-20", "NewJersy", "Rauf");

                return tblData;
          
        }


        public static DataTable RefColumn()
        {
            DataTable dataTable = new DataTable();
            dataTable.Columns.Add("Column_ID", typeof(string));
            dataTable.Columns.Add("Column_Name", typeof(string));
            dataTable.Columns.Add("Excel_column", typeof(string));
            dataTable.Columns.Add("Country_Name", typeof(string));
            dataTable.Columns.Add("Status", typeof(string));
            dataTable.Rows.Add("Prod_ID", "Prod.No", "H", "USA", "Active");
            dataTable.Rows.Add("Prod_Name", "Prod.Name", "A", "USA", "Active");
            dataTable.Rows.Add("Prod_Quantity", "Quantity", "C", "USA", "Active");
            dataTable.Rows.Add("Prod_Expiry", "Expiry Date", "D", "USA", "Active");
            dataTable.Rows.Add("Prod_Manf_Date", "Manufacturing Date", "E", "USA", "Active");
            dataTable.Rows.Add("Prod_Region", "Region", "B", "USA", "Active");
            dataTable.Rows.Add("Prod_Head", "Head of Region", "G", "USA", "Active");
            dataTable.Rows.Add("Prod_ID", "Prod. No", "B", "UK", "Active");
            dataTable.Rows.Add("Prod_Name", "Prod. Name", "A", "UK", "Active");
            dataTable.Rows.Add("Prod_Quantity", "Quantity", "X", "UK", "Active");
            dataTable.Rows.Add("Prod_Expiry", "Expiry Date", "M", "UK", "Active");
            dataTable.Rows.Add("Prod_Manf_Date", "Manufacturing Date", "N", "UK", "Active");
            dataTable.Rows.Add("Prod_Region", "Region", "O", "UK", "Active");
            dataTable.Rows.Add("Prod_Head", "Head of Region", "K", "UK", "Active");
            dataTable.Rows.Add("Prod_ID", "Prod. No", "A", "INDIA", "Active");
            dataTable.Rows.Add("Prod_Name", "Prod. Name", "B", "INDIA", "Active");
            dataTable.Rows.Add("Prod_Quantity", "Quantity", "C", "INDIA", "Active");
            dataTable.Rows.Add("Prod_Expiry", "Expiry Date", "D", "INDIA", "Active");
            dataTable.Rows.Add("Prod_Manf_Date", "Manufacturing Date", "E", "INDIA", "Active");
            dataTable.Rows.Add("Prod_Region", "Region", "F", "INDIA", "Active");
            dataTable.Rows.Add("Prod_Head", "Head of Region", "F", "INDIA", "Active");

            return dataTable;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            comboBox1.Items.Add("USA");
            comboBox1.Items.Add("UK");
            comboBox1.Items.Add("INDIA");
        }
    }
}

pls. have a look inside the code, and let me know where we have to change the code to print appropriate columns in excel...

Waiting for favourable reply.

I am trying to find count of all files in folder day wise showed in below image.(expected output)

Could you please help me how to loop all the files in a directory (Folder) to get the count of files and CreatedDate(Day wise).

Attempt : Below is the main method in C Sharp class

staticvoidMain(string[] args){Program p =newProgram();var directory =newDirectoryInfo(@"C:\Test\TestFileCount");var myFile =(from f in directory.GetFiles()orderby f.LastWriteTimedescendingselect f).First();List<FileInfo>FilesInNovember= p.GetFilesByDate(15,@"C:\Test\TestFileCount");Console.WriteLine("Number of files "+"\t"+FilesInNovember.Count+"\t"+"On"+"\t"+ myFile.LastWriteTime.ToString());Console.ReadLine();}

GetFilesByDate method defination

privateList<FileInfo>GetFilesByDate(intDayToGet,string directoryPath){DirectoryInfo dir =newDirectoryInfo(directoryPath);//  note use of the option to search sub-directoriesFileInfo[] theFiles = dir.GetFiles("*",SearchOption.AllDirectories);return theFiles.Where(fl => fl.CreationTime.Day==DayToGet).ToList();}

Some links with similar output requirement, but in VB.Net . Getting difficulty to understand it.http://www.codepal.co.uk/show/Show_file_count_and_filesizes_grouped_by_monthly_creation_date_in_ASPNET

Expected Output and Current out put with above code:

CPK

Hi

How to create a scrollable video timeline and perform zooming on it using windows form.

Thank you.

Hi,

i have a query on folder upload control using  ajax cute UI using asp.net c#.Please suggest me solution

iam able to upload the folder in to a directory inside the project, but not able upload multiple files in folder and refresh second time before inserting clear contents from folder add newly updated multiple files. 

Please check for below Code Snippet

With Regards,

Sandeep M

Hello,

I'm using SQL Server SMO v150.18208.0 (installed from Nuget) in my C# application.

I've been using server.ConnectionContext.ExecuteNonQuery to run SQL scripts that contain GOstatements, and it works great.

Recently, I also discovered ExecuteWithResults methods which works(in order to get SELECT result sets), but only when the script doesn't have any GO statement, otherwise, I run into "Incorrect syntax near 'GO'" error.

Is this something normal or is it a bug ? If not, is there a way to avoid this behavior ?

Thanks.

Hi,

I am trying to schedule a task via c# code(winforms). But before creating I would like to check whether a task of the same name already exists. I am trying to get a list of tasks using schtasks /query. But it gives other information as well ,like HostName, Status etc. I need only the list of TaskNames.

I tried the code as shown below. The strOutput shows headers, status, hostname and next time run along with TaskName. I need only Tasknames. Help would be appreciated.

}

Hi Team

I am experince this issue close to a day and half now, no one seem to help. Basically i am using MVC to develop user registration to the dashboard. The problem is on my AuthConfig.cs under AppStart folder, here is my logic below;