/// <summary>
/// return File(bs, "application/vnd.ms-excel");
/// </summary>
/// <param name="tb"></param>
/// <returns></returns>
public static byte[] DataTableToExcel(DataTable tb)
{
tb = tb ?? throw new Exception($"无法把空{nameof(DataTable)}转成Excel");
using (var ms = new MemoryStream())
{
var workbook = new NPOI.XSSF.UserModel.XSSFWorkbook();
var sheet = workbook.CreateSheet(ValidateHelper.IsPlumpString(tb.TableName) ? tb.TableName : "sheet");
var style = GetStyle(workbook,
NPOI.HSSF.Util.HSSFColor.White.Index, NPOI.HSSF.Util.HSSFColor.Black.Index);
for (int i = 0; i < tb.Rows.Count; ++i)
{
var row = sheet.CreateRow(i);
for (int j = 0; j < tb.Columns.Count; ++j)
{
var cell = row.CreateCell(j);
var data = tb.Rows[i][j];
cell.SetCellValue(ConvertHelper.GetString(data));
cell.CellStyle = style;
}
}
workbook.Write(ms);
workbook.Clear();
tb.Clear();
var bs = ms.ToArray();
return(bs);
}
}
/// <summary>
/// return File(bs, "application/vnd.ms-excel");
/// </summary>
public byte[] DataTableToExcel(DataTable tb, bool show_header = true)
{
tb = tb ?? throw new ArgumentNullException($"无法把空{nameof(DataTable)}转成Excel");
using (var ms = new MemoryStream())
{
var workbook = new NPOI.XSSF.UserModel.XSSFWorkbook();
var sheet = workbook.CreateSheet(ValidateHelper.IsNotEmpty(tb.TableName) ? tb.TableName : "sheet");
var columns = tb.Columns.AsEnumerable_ <DataColumn>();
var row_index = 0;
IRow NewRow() => sheet.CreateRow(row_index++);
if (show_header)
{
//头部
var header_style = this.GetStyle(workbook,
NPOI.HSSF.Util.HSSFColor.Black.Index,
NPOI.HSSF.Util.HSSFColor.White.Index);
var header = NewRow();
var cell_index = 0;
foreach (var col in columns)
{
var cell = header.CreateCell(cell_index++, CellType.String);
var data = col.ColumnName;
cell.SetCellValue(data);
cell.CellStyle = header_style;
}
}
var style = this.GetStyle(workbook,
NPOI.HSSF.Util.HSSFColor.White.Index,
NPOI.HSSF.Util.HSSFColor.Black.Index);
foreach (var tb_row in tb.Rows.AsEnumerable_ <DataRow>())
{
var row = NewRow();
var cell_index = 0;
foreach (var tb_col in columns)
{
var cell = row.CreateCell(cell_index++, CellType.String);
var data = tb_row[tb_col.ColumnName];
cell.SetCellValue(ConvertHelper.GetString(data));
cell.CellStyle = style;
}
}
workbook.Write(ms);
workbook.Clear();
tb.Clear();
var bs = ms.ToArray();
return(bs);
}
}
/// <summary>
/// return File(bs, "application/vnd.ms-excel");
/// </summary>
/// <param name="tb"></param>
/// <returns></returns>
public static byte[] DataTableToExcel(DataTable tb)
{
if (tb == null)
{
return(null);
}
using (var ms = new MemoryStream())
{
var workbook = new NPOI.XSSF.UserModel.XSSFWorkbook();
var sheet = workbook.CreateSheet(ValidateHelper.IsPlumpString(tb.TableName) ? tb.TableName : "sheet");
var style = GetStyle(workbook,
NPOI.HSSF.Util.HSSFColor.Red.Index, NPOI.HSSF.Util.HSSFColor.White.Index);
NPOI.SS.UserModel.IRow row = null;
NPOI.SS.UserModel.ICell cell = null;
for (int i = 0; i < tb.Rows.Count; ++i)
{
row = sheet.CreateRow(i);
for (int j = 0; j < tb.Columns.Count; ++j)
{
cell = row.CreateCell(j);
cell.SetCellValue(ConvertHelper.GetString(tb.Rows[i][j]));
cell.CellStyle = style;
}
}
workbook.Write(ms);
workbook.Clear();
tb.Clear();
var bs = ms.ToArray();
return(bs);
}
}
