c＃将TEXT文件中的特定列添加到DataGridView

Question

Hello Everyone,

As shown in the above image I want to add the decimal numbers column wise from a text file to datagrid control.

Following is my code snippet

List<string> str = new List<string>();
        String st = "";
        int k = 0;
        string[] s ;
        //Path to write contents to text file
        string filename = @"E:\Vivek\contentcopy\clientlist.txt";
        Form.CheckForIllegalCrossThreadCalls = false;
        OpenFileDialog ofd = new OpenFileDialog();
        ofd.FileName = "";

        ofd.ShowDialog();
        st = ofd.FileName;

        if (string.IsNullOrEmpty(ofd.FileName))
            return;
        string Name = "", No1 = "",No2="";
        string[] lines = File.ReadAllLines(st).Where(sw => !string.IsNullOrWhiteSpace(sw)).ToArray();
        for (int i = 0; i < lines.Length; i++)
        {

            if (lines[i].Contains("VENTURA SECURITIES LIMITED (NSE F&O)")) continue;
            if (lines[i].Contains("ALL EXCHANGES DERIVATIVES CLIENTWISE STATEMENT AS ON 16-05-2012")) continue;
            if (lines[i].Contains("-------------------------------------------------------")) continue;
            s = lines[i].Split(' ');
            if (s[0] == "PARTY" || s[0] == "") continue;
            int z;
            Name = "";

            for (z = 1; z < s.Length; z++)
            {
                if (s[z] == "") continue;                    
                if (s[z].Contains('.'))
                {
                    No1+=s[z]+" ";
                    No2 = No1 + " ";  

                } 
                else
                {
                    Name += s[z];
                    str.Add(s[0]+"  "+Name);

                }



            }

            dataGridView1.Rows.Add();
            dataGridView1.Rows[k].Cells[0].Value = s[0];
            dataGridView1.Rows[k].Cells[1].Value = Name;
            dataGridView1.Rows[k].Cells[2].Value = No1;
            dataGridView1.Rows[k].Cells[3].Value =  No2;
            k++;
        }


        File.WriteAllLines(filename, str);
        dataGridView1.ReadOnly = true;
    }

The line No1=s[z] directly takes the last column values ie 46,123.19 and so on.I want to fetch each column from the text file and store it in a string variable and then assign it to the datagrid view I hope my doubt is clear.If not please let me know

Answer 1

Lets say, you have for lines in your test file, then u need to do following things:

1. Use StreamReader.ReadLine(), to read one line at time.
2. Spilt the line using split(' ') and store it in a array
3. Remove all the empty ones from the array
4. Now at index 2,3,4,5,6 of the resulting array will have the string equivalent of the decimal numbers.
5. Repeat this for each StreamReader.ReadLine()

Hope this will help.

Answer 2

Here is the simplest Solution:

Add a DataGrid View to Form and add a Button:

 private void button1_Click(object sender, EventArgs e)
    {
        ReadAndFileter();
    }
    private void ReadAndFileter()
    {
        try
        {
            using(System.IO.StreamReader reader = new System.IO.StreamReader("file.txt"))
            {
                string line;
                string []array;
                int rowcount= 0;
                decimal number;
                string[] separators = { "\t", " " };
                int columnCount = 0;
                while ((line = reader.ReadLine()) != null)
                {

                   array = line.Split(separators, StringSplitOptions.RemoveEmptyEntries); 
                   dataGridView1.Rows.Add();
                   foreach  (string str in array)
                   {

                       if (Decimal.TryParse(str,out number))
                       {
                           dataGridView1.Rows[rowcount].Cells[columnCount++].Value = number;                               
                       }                           
                   }
                   rowcount++;
                   columnCount = 0;
                }
            }
        }
        catch (Exception ex)
        {
        }
    }

The File Contents are:

Abc         20.122      69.33   0.00        693.25  0.00
def         36.20       96.20   1.15        69.56   8.96

And the final output:

Answer 3

Your problem is that you are overwriting No1 every time you read a string, which explains why you only get the last value. What you could do is either;

Append the string:

   No1 += s[z] + " ";

Which will put all the values behind eachother, seperated by a whitespace.

Or, you could make a List<String> and add each value to the list, meaning you have them stored seperated:

   List<String> values = new List<String>();
   foreach(...)
   {
      if (s[z] == "") continue;                    
      if (s[z].Contains('.'))
      {
            values.Add(s[z])
      } 
      else
      {
             Name += s[z];
             str.Add(s[0] + "  " + Name);
      }
   }

You can thereafter loop through the list and add each value to a row. Considering your code piece;

int i = 2;
foreach(string value in values)
{
   dataGridView1.Rows[k].Cells[i].Value = value;
   i++;
}

This should work.

Hope this helps.

Answer 4

Here is edited code: but for future I must suggest to give a try at least..

private void ReadAndFileter1()
    {
        try
        {
            using (System.IO.StreamReader reader = new System.IO.StreamReader("file.txt"))
            {
                string line;
                string[] array;
                int rowcount = 0;
                decimal number;
                string[] separators = { "\t", " " };
                int columnCount = 1;
                string[] lines = File.ReadAllLines("file.txt");
                for (int i = 0; i < lines.Length; i++)
                {
                    if (lines[i].Contains("VENTURA SECURITIES LIMITED (NSE F&O)")) continue;
                    if (lines[i].Contains("ALL EXCHANGES DERIVATIVES CLIENTWISE STATEMENT AS ON 16-05-2012")) continue;
                    if (lines[i].Contains("-------------------------------------------------------")) continue;

                    array = lines[i].Split(separators, StringSplitOptions.RemoveEmptyEntries);
                    if (array[0] == "PARTY" || array[0] == "") continue;

                    dataGridView1.Rows.Add();
                    foreach (string str in array)
                    {
                        if (Decimal.TryParse(str, out number))
                        {
                            dataGridView1.Rows[rowcount].Cells[columnCount++].Value = number;
                        }
                    }
                    dataGridView1.Rows[rowcount].Cells[0].Value = array[0];
                    rowcount++;
                    columnCount = 1;
                }
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }
}

Answer 5

Here it is:

static void Main(string[] args)
    {
        Decimal result;
        string[] splitchar = new string[]{" "};

        using(StreamReader reader = new StreamReader(@"C:\Users\Dell\Desktop\input.txt"))
        {
            while(!reader.EndOfStream)
            {
                string[] splittedArray = reader.ReadLine().Split(splitchar,                      StringSplitOptions.RemoveEmptyEntries).Where(x => Decimal.TryParse(x, out result)).ToArray();

                // put your code here to get insert the values in datagrid
            }
        }

    }