1 //Datatable导出Excel
2 private static void GridToExcelByNPOI(DataTable dt, string strExcelFileName)
3 {
4 try
5 {
6 HSSFWorkbook workbook = new HSSFWorkbook();
7 ISheet sheet = workbook.CreateSheet("Sheet1");
8
9 ICellStyle HeadercellStyle = workbook.CreateCellStyle();
10 HeadercellStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
11 HeadercellStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
12 HeadercellStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
13 HeadercellStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;
14 HeadercellStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;
15 //字体
16 NPOI.SS.UserModel.IFont headerfont = workbook.CreateFont();
17 headerfont.Boldweight = (short)FontBoldWeight.Bold;
18 HeadercellStyle.SetFont(headerfont);
19
20
21 //用column name 作为列名
22 int icolIndex = 0;
23 IRow headerRow = sheet.CreateRow(0);
24 foreach (DataColumn item in dt.Columns)
25 {
26 ICell cell = headerRow.CreateCell(icolIndex);
27 cell.SetCellValue(item.ColumnName);
28 cell.CellStyle = HeadercellStyle;
29 icolIndex++;
30 }
31
32 ICellStyle cellStyle = workbook.CreateCellStyle();
33
34 //为避免日期格式被Excel自动替换，所以设定 format 为 『@』 表示一率当成text來看
35 cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("@");
36 cellStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
37 cellStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
38 cellStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
39 cellStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;
40
41
42 NPOI.SS.UserModel.IFont cellfont = workbook.CreateFont();
43 cellfont.Boldweight = (short)FontBoldWeight.Normal;
44 cellStyle.SetFont(cellfont);
45
46 //建立内容行
47 int iRowIndex = 1;
48 int iCellIndex = 0;
49 foreach (DataRow Rowitem in dt.Rows)
50 {
51 IRow DataRow = sheet.CreateRow(iRowIndex);
52 foreach (DataColumn Colitem in dt.Columns)
53 {
54
55 ICell cell = DataRow.CreateCell(iCellIndex);
56 cell.SetCellValue(Rowitem[Colitem].ToString());
57 cell.CellStyle = cellStyle;
58 iCellIndex++;
59 }
60 iCellIndex = 0;
61 iRowIndex++;
62 }
63
64 //自适应列宽度
65 for (int i = 0; i < icolIndex; i++)
66 {
67 sheet.AutoSizeColumn(i);
68 }
69
70 //写Excel
71 FileStream file = new FileStream(strExcelFileName, FileMode.OpenOrCreate);
72 workbook.Write(file);
73 file.Flush();
74 file.Close();
75
76 MessageBox.Show(m_Common_ResourceManager.GetString("Export_to_excel_successfully"), m_Common_ResourceManager.GetString("Information"), MessageBoxButtons.OK, MessageBoxIcon.Information);
77 }
78 catch (Exception ex)
79 {
80 ILog log = LogManager.GetLogger("Exception Log");
81 log.Error(ex.Message + Environment.NewLine + ex.StackTrace);
82 //记录AuditTrail
83 CCFS.Framework.BLL.AuditTrailBLL.LogAuditTrail(ex);
84
85 MessageBox.Show(m_Common_ResourceManager.GetString("Export_to_excel_failed"), m_Common_ResourceManager.GetString("Information"), MessageBoxButtons.OK, MessageBoxIcon.Information);
86 }
87 finally { workbook = null; }
88
89 }
*********************************
/// <summary>
/// Excel文件导成Datatable
/// </summary>
/// <param name="strFilePath">Excel文件目录地址</param>
/// <param name="strTableName">Datatable表名</param>
/// <param name="iSheetIndex">Excel sheet index</param>
/// <returns></returns>
public static DataTable XlSToDataTable(string strFilePath, string strTableName,int iSheetIndex)
{
string strExtName = Path.GetExtension(strFilePath);
DataTable dt = new DataTable();
if (!string.IsNullOrEmpty(strTableName))
{
dt.TableName = strTableName;
}
if (strExtName.Equals(".xls") || strExtName.Equals(".xlsx"))
{
using (FileStream file = new FileStream(strFilePath, FileMode.Open, FileAccess.Read))
{
HSSFWorkbook workbook = new HSSFWorkbook(file);
ISheet sheet = workbook.GetSheetAt(iSheetIndex);
//列头
foreach (ICell item in sheet.GetRow(sheet.FirstRowNum).Cells)
{
dt.Columns.Add(item.ToString(),typeof(string));
}
//写入内容
System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
while(rows.MoveNext())
{
IRow row = (HSSFRow)rows.Current;
if (row.RowNum == sheet.FirstRowNum)
{
continue;
}
DataRow dr = dt.NewRow();
foreach (ICell item in row.Cells)
{
switch (item.CellType)
{
case CellType.Boolean:
dr[item.ColumnIndex] = item.BooleanCellValue;
break;
case CellType.Error:
dr[item.ColumnIndex] = ErrorEval.GetText(item.ErrorCellValue);
break;
case CellType.Formula:
switch (item.CachedFormulaResultType)
{
case CellType.Boolean:
dr[item.ColumnIndex] = item.BooleanCellValue;
break;
case CellType.Error:
dr[item.ColumnIndex] = ErrorEval.GetText(item.ErrorCellValue);
break;
case CellType.Numeric:
if (DateUtil.IsCellDateFormatted(item))
{
dr[item.ColumnIndex] = item.DateCellValue.ToString("yyyy-MM-dd hh:MM:ss");
}
else
{
dr[item.ColumnIndex] = item.NumericCellValue;
}
break;
case CellType.String:
string str = item.StringCellValue;
if (!string.IsNullOrEmpty(str))
{
dr[item.ColumnIndex] = str.ToString();
}
else
{
dr[item.ColumnIndex] = null;
}
break;
case CellType.Unknown:
case CellType.Blank:
default:
dr[item.ColumnIndex] = string.Empty;
break;
}
break;
case CellType.Numeric:
if (DateUtil.IsCellDateFormatted(item))
{
dr[item.ColumnIndex] = item.DateCellValue.ToString("yyyy-MM-dd hh:MM:ss");
}
else
{
dr[item.ColumnIndex] = item.NumericCellValue;
}
break;
case CellType.String:
string strValue = item.StringCellValue;
if (string.IsNullOrEmpty(strValue))
{
dr[item.ColumnIndex] = strValue.ToString();
}
else
{
dr[item.ColumnIndex] = null;
}
break;
case CellType.Unknown:
case CellType.Blank:
default:
dr[item.ColumnIndex] = string.Empty;
break;
}
}
dt.Rows.Add(dr);
}
}
}
return dt;
}
。。。
转载别人的；
自己做个记录；
以后万一再用到了呢···
时间： 2024-10-26 04:54:17