C#: OpenXML cannot get columns name print into excel file - excel

Question

This is a console application trying to print data from datatable to excel file using open XML lib. I have also provided datatable code for reference.
class ProgramCheck
{
private static void Main()
{
SpreadsheetDocument spreadsheetDocument = SpreadsheetDocument.Create(#"C:\Users\nilam\Desktop\Work\project\GeneratedExcel.xlsx", SpreadsheetDocumentType.Workbook);
WorkbookPart workbookPart = spreadsheetDocument.AddWorkbookPart();
workbookPart.Workbook = new Workbook();
WorksheetPart worksheetPart = workbookPart.AddNewPart<WorksheetPart>();
worksheetPart.Worksheet = new Worksheet(new SheetData());
Sheets sheets = spreadsheetDocument.WorkbookPart.Workbook.AppendChild<Sheets>(new Sheets());
Sheet sheet = new Sheet()
{
Id = workbookPart.GetIdOfPart(worksheetPart),
SheetId = 1,
Name = "TestSheet2"
};
sheets.Append(sheet);
SheetData sheetData = worksheetPart.Worksheet.GetFirstChild<SheetData>();
DataTable dt = Data.SampleData();
foreach (DataRow item in dt.Rows)
{
Row row = new Row();
for (int i = 0; i < item.ItemArray.Length; i++)
{
foreach (DataColumn itemCol in dt.Columns)
{
Columns col = new Columns();
Cell cell1 = new Cell()
{
CellValue = new CellValue(item[i].ToString()),
DataType = CellValues.String
};
col.Append(cell1);
Cell cell = new Cell()
{
CellValue = new CellValue(item[i].ToString()),
DataType = CellValues.String
};
row.Append(cell);
}
}
sheetData.Append(row);
}
workbookPart.Workbook.Save();
spreadsheetDocument.Close();
}
}
Code for row works fine, but when I try to loop through columns for heading, it does not append anything. I am using openXML to get data from the data table and output it into an excel file.
This is datatable (data.cs)
class Data
{
public static DataTable SampleData()
{
System.Data.DataTable dt = new System.Data.DataTable();
dt.Columns.Add("ID");
dt.Columns.Add("Name");
dt.Columns.Add("Salary");
dt.Rows.Add("01", "Anis", "1000");
dt.Rows.Add("02", "AK", "2000");
dt.Rows.Add("03", "Mak", "3000");
return dt;
}
}
I have looked at the documentation of openXML but could not find anything so far.
[![enter image description here][1]][1]
enter code here
[1]: https://i.stack.imgur.com/EaPLh.png

Answer 1

I solved this...this is for someone who needs help. This code can be more refined you are welcome to do so and paste it.
SpreadsheetDocument spreadsheetDocument = SpreadsheetDocument.Create(#"C:\Users\nilam\Desktop\Work\project\GeneratedExcel.xlsx", SpreadsheetDocumentType.Workbook);
WorkbookPart workbookPart = spreadsheetDocument.AddWorkbookPart();
workbookPart.Workbook = new Workbook();
WorksheetPart worksheetPart = workbookPart.AddNewPart<WorksheetPart>();
worksheetPart.Worksheet = new Worksheet(new SheetData());
Sheets sheets = spreadsheetDocument.WorkbookPart.Workbook.AppendChild<Sheets>(new Sheets());
Sheet sheet = new Sheet()
{
Id = workbookPart.GetIdOfPart(worksheetPart),
SheetId = 1,
Name = "TestSheet2"
};
sheets.Append(sheet);
SheetData sheetData = worksheetPart.Worksheet.GetFirstChild<SheetData>();
DataTable dt = Data.SampleData();
//this is for Columns heading
Row rowHeading = new Row();
for (int j = 0; j < dt.Columns.Count; j++)
{
Cell cell1 = new Cell()
{
CellValue = new CellValue(dt.Columns[j].ColumnName.ToString()),
DataType = CellValues.String
};
rowHeading.Append(cell1);
}
sheetData.Append(rowHeading);
//this is for row content
foreach (DataRow item in dt.Rows)
{
Row row = new Row();
for (int i = 0; i < item.ItemArray.Length; i++)
{
Cell cell = new Cell()
{
CellValue = new CellValue(item[i].ToString()),
DataType = CellValues.String
};
row.Append(cell);
}
sheetData.Append(row);
}
workbookPart.Workbook.Save();
spreadsheetDocument.Close();
}