在C#中从datagridview导出一个excel列

Question

I have excel data as follow:

---

Project | person | Time | Date

support | A |50 | 2019-10-10

IT | B |1,20 |2019-10-10

debugg | A |30 |2019-10-11

support | c |20 |2019-10-11

support | A |30 |2019-10-12

IT | B | 1.20 |2019-10-12

---

In my code I can export all excel data from datagridview, how I do to export one column only. I want to export column Project and do sort for every type of project and sum eg the exported new excel file should be as follow:

2019-10-10 to 2019-10-12

Project | Sum

support | 1.40

IT | 2.40

debugg | 30

Here is my export code. can you help me please.

Thank you for hand.

 private void copyAlltoClipboard()
    {
        dataGridView1.SelectAll();
        DataObject dataObj = dataGridView1.GetClipboardContent();
        if (dataObj != null)
            Clipboard.SetDataObject(dataObj);
    }

    private void Button4_Click(object sender, EventArgs e)
    {
        copyAlltoClipboard();
        Microsoft.Office.Interop.Excel.Application xlexcel;
        Microsoft.Office.Interop.Excel.Workbook xlWorkBook;
        Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet;
        object misValue = System.Reflection.Missing.Value;
        xlexcel = new Excel.Application();
        xlexcel.Visible = true;
        xlWorkBook = xlexcel.Workbooks.Add(misValue);
        xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
        Excel.Range CR = (Excel.Range)xlWorkSheet.Cells[1, 1];
        CR.Select();
        xlWorkSheet.PasteSpecial(CR, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, true);
    }

Answer 1

For the way you did it you could use something like go through your columns, check which one is selected and then export it, or directly select your column. But there is still room for improvement, I just wrote down what came to my mind.

 StringBuilder strContent = new StringBuilder();
 foreach (DataGridViewColumn col in dgv.Columns)
 {
     if(col.Selected)
     {
         foreach (DataGridViewRow row in dgv.Rows)
         {
            strContent.Append(row.Cells[col.Index].Value.ToString());
            strContent.Append("\t");
        }
     }
  }
  Clipboard.SetText(strContent.ToString());