如何使用C＃以不同的颜色，大小，字体，粗体和斜体格式以excel或csv格式写入数据

Question

I am writing some report in csv ...so for the best visibility i have to write some data in bold style and some data in different color while writing data into csv..i am using below code for writing in csv ..

        FileInfo outtxt = new FileInfo(filename);
        //  StreamWriter logline = outtxt.AppendText();
        // initialiseStream();
        StreamWriter logline = new StreamWriter(fs);
        if (f == 0)
        {
            logline.WriteLine("sometext");             
        }

So how can we format this.

Answer 1

Urgent or not:

A .csv (Commas Separated Values) is piure text file, it contains fields separated by , or ; .

It is not possible to include any formatting in these files.

Answer 2

As others have pointed out, .csv is just a simple text file but you can generate .xlsx files using other libraries available in nuget.

In my opinion Epplus is a really easy to use example.

If you install this package then the following should give you an example you can use to get started:

using OfficeOpenXml;
using OfficeOpenXml.Style;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication9
{
    class Program
    {
        static void Main(string[] args)
        {
            using (ExcelPackage package = new ExcelPackage())
            {
                ExcelWorksheet ws = package.Workbook.Worksheets.Add("MySheet");

                ws.Cells["A1"].Value = "Some Bold Text";
                ws.Cells["A1"].Style.Font.Bold = true;
                ws.Cells["A2"].Value = "Some blue text";
                ws.Cells["A2"].Style.Font.Color.SetColor(Color.Blue);
                ws.Cells["A3"].Value = "Some Large Text";
                ws.Cells["A3"].Style.Font.Size = 22;

                ws.Cells["A3"].Style.Border.BorderAround(ExcelBorderStyle.Thin, Color.Red);

                ws.Row(3).Height = 23;
                ws.Column(1).AutoFit();

                package.SaveAs(new System.IO.FileInfo(@"C:\Temp\example.xlsx"));
            }
        }
    }
}

Answer 3

I guess what your are talking about is formatting in excel while displaying the .csv file. CSV is just a plain text file mostly comma separate.

If you want to format excel, take a look at Open XML You have to create some styles to display in bold and with colors.It's a bit painful route. If you want easy , you might want to take a look at Closed XML library. This one does all the hard work for you and you just have to call few methods to get your work done.

Answer 4

You can use EasyXLS Excel library to write both Excel or CSV file, but the CSV file cannot contain formatting, since is just a plain text file format.

To write Excel file use this code sample:

ExcelDocument workbook = new ExcelDocument(1);
ExcelTable tableData = ((ExcelWorksheet)workbook.easy_getSheetAt(0)).easy_getExcelTable();
tableData.easy_getCell(0,0).setValue("sometext");
workbook.easy_WriteXLSFile(filename);

To format the cell use this sample code:

ExcelStyle xlsStyle = new ExcelStyle();
xlsStyle.setBold(true);
xlsStyle.setForeground(Color.DarkGray);
tableData.easy_getCell(0,0).setStyle(xlsStyle);

For more details about formatting check this link:
http://www.easyxls.com/manual/basics/format-excel-cells.html