According to How can columns be set to 'autosize' in Excel documents created with NPOI? I did so:
foreach (DataColumn column in dataTable.Columns)
{
int rowIndex = 0;
foreach (DataRow row in dataTable.Rows)
{
HSSFRow dataRow = sheet.CreateRow(rowIndex);
dataRow.CreateCell(column.Ordinal).SetCellValue(row[column].ToString());
rowIndex++;
}
sheet.AutoSizeColumn(column.Ordinal);
}
But it doesn't work. How to do right?
Here is some code that is working for me, using your loops:
HSSFWorkbook spreadsheet = new HSSFWorkbook();
DataSet results = GetSalesDataFromDatabase();
//here, we must insert at least one sheet to the workbook. otherwise, Excel will say 'data lost in file'
HSSFSheet sheet1 = spreadsheet.CreateSheet("Sheet1");
foreach (DataColumn column in results.Tables[0].Columns)
{
int rowIndex = 0;
foreach (DataRow row in results.Tables[0].Rows)
{
HSSFRow dataRow = sheet1.CreateRow(rowIndex);
dataRow.CreateCell(column.Ordinal).SetCellValue(row[column].ToString());
rowIndex++;
}
sheet1.AutoSizeColumn(column.Ordinal);
}
//Write the stream data of workbook to the file 'test.xls' in the temporary directory
FileStream file = new FileStream(Path.Combine(Path.GetTempPath(), "test.xls") , FileMode.Create);
spreadsheet.Write(file);
file.Close();
If it doesn't work for you then we need to look at the kind of data you're pushing out, see if there's a difference that makes a difference there. (I'm assuming that we don't have a version discrepancy or anything like that).