How do I set excel cell as custom while generating excel by code

Question

0.00/5 (No votes)

See more:

I am generating a excel file using c#, a date time column is set General by default but requirement is for custom. Values are fine but type is general. I added the code

<pre>

C#

ICellStyle dateStyle = (ICellStyle)workbook.CreateCellStyle();
    dateStyle.DataFormat = format.GetFormat("dd-mm-yyyy hh:mm");
 
    
     if (j == 2 || j == 4)
             { currentCell.CellStyle = dateStyle; }

Kindly help to fix this.

What I have tried:

public static byte[] CreateExcelFile(DataTable dt, string fileNameWithPath)
          {
              byte[] excelByte = null;
              try
              {

                  IWorkbook workbook = new HSSFWorkbook();
                  IDataFormat format = workbook.CreateDataFormat();
                  ISheet ws = workbook.CreateSheet("Sheet1");
                  ICellStyle amountStyle = (ICellStyle)workbook.CreateCellStyle();
                  amountStyle.DataFormat = format.GetFormat("#.00");
                  amountStyle.Alignment = HorizontalAlignment.Right;

                  ICellStyle dateStyle = (ICellStyle)workbook.CreateCellStyle();
                  dateStyle.DataFormat = format.GetFormat("dd-mm-yyyy hh:mm");


                  IRow HeaderRow = ws.CreateRow(0);
                  HSSFFont xlFont = (HSSFFont)workbook.CreateFont();
                  xlFont.FontHeightInPoints = 10;
                  xlFont.FontName = "Calibri";
                  HSSFCellStyle hStyle = (HSSFCellStyle)workbook.CreateCellStyle();
                  hStyle.SetFont(xlFont);
                  amountStyle.SetFont(xlFont);

                  HSSFCellStyle rightStyle = (HSSFCellStyle)workbook.CreateCellStyle();
                  rightStyle.Alignment = HorizontalAlignment.Right;

                  rightStyle.SetFont(xlFont);

                  HSSFFont xlboldFont = (HSSFFont)workbook.CreateFont();
                  xlboldFont.FontHeightInPoints = 10;
                  xlboldFont.FontName = "Calibri";
                  xlboldFont.Boldweight = (short)NPOI.SS.UserModel.FontBoldWeight.Bold;
                  HSSFCellStyle hStylebold = (HSSFCellStyle)workbook.CreateCellStyle();
                  hStylebold.SetFont(xlboldFont);



                  IRow HeaderRowData = ws.CreateRow(0);

                  for (int j = 0; j < dt.Columns.Count; j++)
                  {

                      ICell Cell1 = HeaderRowData.CreateCell(j);
                      Cell1.SetCellValue(dt.Columns[j].ColumnName);
                      Cell1.CellStyle = hStyle;

                  }
                  for (int i = 0; i < dt.Rows.Count; i++)
                  {

                      IRow CurrentRow = ws.CreateRow(i + 1);
                      for (int j = 0; j < dt.Columns.Count; j++)
                      {

                          ICell currentCell = CurrentRow.CreateCell(j);
                          currentCell.CellStyle = hStyle;
                          if (j == 0 || j == 2 || j == 3 || j == 5)
                          {
                              currentCell.CellStyle = rightStyle;
                              if (dt.Rows[i][j].ToString() != "" && dt.Rows[i][j] != null)
                              {
                                  var cellValue = Convert.ToDouble(dt.Rows[i][j]);
                                  currentCell.SetCellValue(cellValue);
                              }
                              else
                                  currentCell.SetCellValue(dt.Rows[i][j].ToString());
                              if (j == 2 || j == 3)
                              {
                                  currentCell.CellStyle = amountStyle;

                              }
                              if (j == 2 || j == 4)
                              {
                                  currentCell.CellStyle = dateStyle;
                              }
                          }
                          else
                          {
                              currentCell.SetCellValue(dt.Rows[i][j].ToString());
                          }
                      }
                  }

                  using (MemoryStream ms = new MemoryStream())
              {
                  workbook.Write(ms);
                  excelByte = ms.ToArray();
              }
              var reportDirectory = Path.GetDirectoryName(fileNameWithPath);
              if (!Directory.Exists(reportDirectory))
              {
                  Directory.CreateDirectory(reportDirectory);
              }

              //workbook.Write(fs);
              File.WriteAllBytes(fileNameWithPath, excelByte);
                  //}
                  CreateLogFiles objCreateLogFiles = new CreateLogFiles();
                  objCreateLogFiles.FTPUpload(fileNameWithPath);
              }
              catch (Exception ex)
              {
                  //Error while generating file
                  CreateLogFiles objCreateLogFiles = new CreateLogFiles();
          objCreateLogFiles.UpdateErrorLog("Error while creating Excel file: " + ex.Message);

              }
              return excelByte;
          }

Posted 10-May-23 22:54pm

Shailendra Mishra 2023

Updated 10-May-23 23:24pm

v2

Add a Solution

Comments

Ralf Meier 11-May-23 5:21am

I'm sorry ... which part of the code isn't working well ?
Or better which is the result you get what isn't like you expected it ?

Shailendra Mishra 2023 15-May-23 2:35am

Thank Ralf Meier for your response.
All the code is working fine, I am able to generate the excel using the below code.
But the requirement is like, I have to set the Format of cell as Custom, By default it is General.
I need help, what change we have to do to achieve this.

Kindly refer the image link for more clarity.

https://photos.app.goo.gl/THYi31kh3rBhxmNg6

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Ralf Meier · Answer 1 · 2023-05-10T23:24:00

to the following part of your code I added comments :

C#

if (j == 0 || j == 2 || j == 3 || j == 5)    // <= here you exclude the 4
                          {
                              currentCell.CellStyle = rightStyle;
                              if (dt.Rows[i][j].ToString() != "" && dt.Rows[i][j] != null)
                              {
                                  var cellValue = Convert.ToDouble(dt.Rows[i][j]);
                                  currentCell.SetCellValue(cellValue);
                              }
                              else
                                  currentCell.SetCellValue(dt.Rows[i][j].ToString());
                              if (j == 2 || j == 3)
                              {
                                  currentCell.CellStyle = amountStyle;

                              }
                              if (j == 2 || j == 4)  // <= but here you need it 
                              {
                                  currentCell.CellStyle = dateStyle;
                              }
                          }