导出数据集到excle
作者：互联网
使用 NPOI 插件
//不带样式
public static string ToExcle(List<DataTable> datas, string fileName = "report", string exportpath = "", int from = 1)
{
//获取文件物理路径
string xlsPath = Path.Combine(Environment.CurrentDirectory, exportpath, fileName);
//判断路径，不存在则创建
if (!Directory.Exists(Path.Combine(Environment.CurrentDirectory, exportpath))) //存在则删除
{
Directory.CreateDirectory(Path.Combine(Environment.CurrentDirectory, exportpath));
}
FileStream file = new FileStream(xlsPath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
//获取文件虚拟路径
string saveFileName = Path.Combine(exportpath, fileName);
//创建文件
StreamWriter objStreamWriter = new StreamWriter(file, Encoding.Unicode);
IWorkbook hssfworkbook = new XSSFWorkbook();
//遍历Excel标签
var n = 0;
foreach (DataTable data in datas)
{
if (data.Rows.Count > 0)
{
if (string.IsNullOrEmpty(data.TableName))
data.TableName = "Sheet1";
//标签页名称
ISheet sheet = hssfworkbook.CreateSheet(data.TableName);
n++;
//标题行
XSSFRow dataRow = sheet.CreateRow(0) as XSSFRow;
for (int i = 0; i < data.Columns.Count; i++)
{
if (!string.IsNullOrWhiteSpace(data.Columns[i].ColumnName))
{
dataRow.CreateCell(i).SetCellValue(data.Columns[i].ColumnName); //列值
}
}
//内容行
for (int i = 0; i < data.Rows.Count; i++)
{
dataRow = sheet.CreateRow(i + from) as XSSFRow;
for (int j = 0; j < data.Columns.Count; j++)
{
Regex regex = new Regex(@"<(.|\n)+?>");
var result = regex.Replace(data.Rows[i][j].ToString(), "");
dataRow.CreateCell(j).SetCellValue(result); //列值
}
}
sheet.ForceFormulaRecalculation = true;
if (data.Columns.Contains("ID（勿删）"))
sheet.SetColumnHidden(0, true);
if (data.Columns.Contains("PID（勿删）"))
sheet.SetColumnHidden(1, true);
}
}
//hssfworkbook.RemoveSheetAt(0);
//file.Dispose();
objStreamWriter.Dispose();
using (FileStream fileWrite = new FileStream(xlsPath, FileMode.Create))
{
hssfworkbook.Write(fileWrite);
fileWrite.Dispose();
}
return saveFileName;
}
//带样式
public static string ToStyleExcle(List<DataTable> datas, int type, string fileName = "report", string exportpath = "", int from = 1, int selection = 0, string usercode = "")
{
//获取文件物理路径
string xlsPath = Path.Combine(Environment.CurrentDirectory, exportpath, fileName);
//判断路径，不存在则创建
if (!Directory.Exists(Path.Combine(Environment.CurrentDirectory, exportpath))) //存在则删除
{
Directory.CreateDirectory(Path.Combine(Environment.CurrentDirectory, exportpath));
}
FileStream file = new FileStream(xlsPath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
//获取文件虚拟路径
string saveFileName = Path.Combine(exportpath, fileName);
//创建文件
StreamWriter objStreamWriter = new StreamWriter(file, Encoding.Unicode);
IWorkbook hssfworkbook = new XSSFWorkbook();
//遍历Excel标签
var n = 0;
foreach (DataTable data in datas)
{
if (data.Rows.Count > 0)
{
//标签页名称
ISheet sheet = hssfworkbook.CreateSheet(data.TableName);
n++;
//背景
ICellStyle style = hssfworkbook.CreateCellStyle();
style.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.Yellow.Index;
style.FillPattern = FillPattern.SolidForeground;
style.BorderBottom = BorderStyle.Thin;
style.BorderLeft = BorderStyle.Thin;
style.BorderRight = BorderStyle.Thin;
style.BorderTop = BorderStyle.Thin;
style.Alignment = HorizontalAlignment.Center;
style.VerticalAlignment = VerticalAlignment.Center;
ICellStyle style1 = hssfworkbook.CreateCellStyle();
style1.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.Lime.Index;
style1.FillPattern = FillPattern.SolidForeground;
style1.BorderBottom = BorderStyle.Thin;
style1.BorderLeft = BorderStyle.Thin;
style1.BorderRight = BorderStyle.Thin;
style1.BorderTop = BorderStyle.Thin;
style1.Alignment = HorizontalAlignment.Center;
style1.VerticalAlignment = VerticalAlignment.Center;
ICellStyle style2 = hssfworkbook.CreateCellStyle();
style2.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.Grey25Percent.Index;
style2.FillPattern = FillPattern.SolidForeground;
style2.BorderBottom = BorderStyle.Thin;
style2.BorderLeft = BorderStyle.Thin;
style2.BorderRight = BorderStyle.Thin;
style2.BorderTop = BorderStyle.Thin;
style2.Alignment = HorizontalAlignment.Center;
style2.VerticalAlignment = VerticalAlignment.Center;
//边框
XSSFCellStyle cellStyleTitleNew = hssfworkbook.CreateCellStyle() as XSSFCellStyle;
cellStyleTitleNew.BorderBottom = BorderStyle.Thin;
cellStyleTitleNew.BorderLeft = BorderStyle.Thin;
cellStyleTitleNew.BorderRight = BorderStyle.Thin;
cellStyleTitleNew.BorderTop = BorderStyle.Thin;
//设置单元格的样式：水平对齐居中
cellStyleTitleNew.Alignment = HorizontalAlignment.Center;
cellStyleTitleNew.VerticalAlignment = VerticalAlignment.Center;
//标题行
XSSFRow dataRow = sheet.CreateRow(0) as XSSFRow;
for (int i = 0; i < data.Columns.Count; i++)
{
sheet.SetColumnWidth(i, 100 * 60);
if (!string.IsNullOrWhiteSpace(data.Columns[i].ColumnName))
{
dataRow.CreateCell(i).SetCellValue(data.Columns[i].ColumnName); //列值
int width = data.Columns[i].ColumnName.Length;
dataRow.GetCell(i).CellStyle = cellStyleTitleNew;
}
if (selection == 1)
{
if (i > 1)
{
dataRow.GetCell(i).CellStyle = style;
}
}
}
if (type == 3)
{
dataRow.Height = 25 * 20;//制定行高25
}
if (selection == 1)
{
dataRow.Height = 25 * 20;//制定行高25
}
string analyte = "";
//内容行
for (int i = 0; i < data.Rows.Count; i++)
{
dataRow = sheet.CreateRow(i + from) as XSSFRow;
for (int j = 0; j < data.Columns.Count; j++)
{
//列值
Regex regex = new Regex(@"<(.|\n)+?>");
var result = regex.Replace(data.Rows[i][j].ToString(), "");
var res = data.Rows[i][j];
dataRow.CreateCell(j).SetCellValue(result);
dataRow.GetCell(j).CellStyle = cellStyleTitleNew;
if (type == 3)
{
if (i == 2 && j > 2)
{
dataRow.GetCell(j).CellStyle = style;
}
}
//if (i > 2 && j > 3)
//{
// var aa = data.Rows[i][9].ToString();
//}
if (selection == 1)
{
if (i >= 0 && j > 1 && !string.IsNullOrEmpty(result) && result == "/")
{
dataRow.GetCell(j).CellStyle = style1;
}
}
try
{
analyte = data.Rows[2][j].ToString();
//1。实验室空白：分析项"干物质含量"为空时，标底色
//2。非实验室空白：除"干物质含量"分析项外，标底色
if (i > 2 && j > 2 && string.IsNullOrEmpty(result))
{
if (Convert.IsDBNull(res))
{
result = "-";
dataRow.CreateCell(j).SetCellValue(result);
dataRow.GetCell(j).CellStyle = style2;
}
else if (!(data.Rows[i]["监测点名称/QC类型"].ToString() != "实验室空白" && data.Rows[2][j].ToString().Contains("干物质含量")))
{
dataRow.GetCell(j).CellStyle = style1;
}
}
else if (i > 2 && j > 2 && usercode.Equals("luoy") && (analyte.IndexOf("称量样品质量") > -1 || analyte.IndexOf("萃取液体积") > -1))
{
dataRow.GetCell(j).CellStyle = style1;
}
}
catch
{
}
}
if (type == 3)
{
dataRow.Height = 25 * 20;//制定行高25
}
if (selection == 1)
{
dataRow.Height = 25 * 20;//制定行高25
}
}
////设置自适应宽度
//for (int columnNum = 0; columnNum <= data.Columns.Count; columnNum++)
//{
// int columnWidth = (sheet.GetColumnWidth(columnNum) / 256) + 10;
// for (int rowNum = 1; rowNum <= sheet.LastRowNum; rowNum++)
// {
// IRow currentRow = sheet.GetRow(rowNum);
// if (currentRow.GetCell(columnNum) != null)
// {
// NPOI.SS.UserModel.ICell currentCell = currentRow.GetCell(columnNum);
// int length = Encoding.Default.GetBytes(currentCell.ToString()).Length;
// if (columnWidth < length)
// {
// columnWidth = length;
// }
// }
// }
// sheet.SetColumnWidth(columnNum, columnWidth * 256);
//}
sheet.ForceFormulaRecalculation = true;
if (data.Columns.Contains("ID（勿删）"))
sheet.SetColumnHidden(0, true);
if (data.Columns.Contains("PID（勿删）"))
sheet.SetColumnHidden(1, true);
}
}
//hssfworkbook.RemoveSheetAt(0);
//file.Dispose();
objStreamWriter.Dispose();
using (FileStream fileWrite = new FileStream(xlsPath, FileMode.Create))
{
hssfworkbook.Write(fileWrite);
fileWrite.Dispose();
}
return saveFileName;
}
标签：集到,style1,string,导出,dataRow,Thin,excle,data,BorderStyle 来源： https://www.cnblogs.com/weixin18/p/15254148.html