class ExcelHelper
{
/// <summary>
/// 將excel導入到datatable
/// </summary>
/// <param name="filePath">excel路徑</param>
/// <param name="isColumnName">第一行是否是列名</param>
/// <returns>返回datatable</returns>
public static DataTable ExcelToDataTable(bool isColumnName, string filePath = "")
{
DataTable dataTable = null;
FileStream fs = null;
DataColumn column = null;
DataRow dataRow = null;
if (filePath == "")
{
System.Windows.Forms.OpenFileDialog ofd = new System.Windows.Forms.OpenFileDialog();
ofd.Filter = "Excel 2007-13文件(*.xlsx)|*.xlsx|Excel 2003文件(*.xls)|*.xls";
if (ofd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
filePath = ofd.FileName;
}
else
{
return null;
}
}
IWorkbook workbook = null;
ISheet sheet = null;
IRow row = null;
int startRow = 0;
try
{
using (fs = File.OpenRead(filePath))
{
// 2007版本
if (filePath.IndexOf(".xlsx") > 0)
workbook = new XSSFWorkbook(fs);
// 2003版本
else if (filePath.IndexOf(".xls") > 0)
workbook = new HSSFWorkbook(fs);
if (workbook != null)
{
int sheetnum = workbook.NumberOfSheets;
for (int s = 0; s < sheetnum; s++)
{
sheet = workbook.GetSheetAt(s);
if (s == 0)
{
dataTable = new DataTable();
if (sheet != null)
{
int rowCount = sheet.LastRowNum;//總行數
if (rowCount > 0)
{
IRow firstRow = sheet.GetRow(0);//第一行
IRow header = sheet.GetRow(sheet.FirstRowNum);
int cellCount = firstRow.LastCellNum;//列數
List<int> columns = new List<int>();
//構建datatable的列
if (isColumnName)
{
startRow = 1;//如果第一行是列名，則從第二行開始讀取
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
object obj = GetValueType(header.GetCell(i));
if (obj == null || obj.ToString() == string.Empty)
{
dataTable.Columns.Add(new DataColumn("Columns" + i.ToString()));
}
else
{
dataTable.Columns.Add(new DataColumn(obj.ToString()));
}
columns.Add(i);
}
}
else
{
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
column = new DataColumn("column" + (i + 1));
dataTable.Columns.Add(column);
}
}
//填充行
for (int i = startRow; i <= rowCount; ++i)
{
row = sheet.GetRow(i);
if (row == null) continue;
dataRow = dataTable.NewRow();
bool hasValue = false;
foreach (int j in columns)
{
dataRow[j] = GetValueType(sheet.GetRow(i).GetCell(j));
if (dataRow[j] != null && dataRow[j].ToString() != string.Empty)
{
hasValue = true;
}
}
if (hasValue)
{
dataTable.Rows.Add(dataRow);
}
}
}
}
}
else
{
isColumnName = false;
if (sheet != null)
{
int rowCount = sheet.LastRowNum;//總行數
if (rowCount > 0)
{
IRow firstRow = sheet.GetRow(0);//第一行
IRow header = sheet.GetRow(sheet.FirstRowNum);
int cellCount = firstRow.LastCellNum;//列數
//填充行
for (int i = 1; i <= rowCount; ++i)
{
row = sheet.GetRow(i);
if (row == null) continue;
dataRow = dataTable.NewRow();
bool hasValue = false;
for (int j = 0; j < dataTable.Columns.Count; j++)
{
dataRow[j] = GetValueType(sheet.GetRow(i).GetCell(j));
if (dataRow[j] != null && dataRow[j].ToString() != string.Empty)
{
hasValue = true;
}
}
if (hasValue)
{
dataTable.Rows.Add(dataRow);
}
}
}
}
}
}
}
}
return dataTable;
}
catch (Exception)
{
if (fs != null)
{
fs.Close();
}
return null;
}
}
/// <summary>
/// 獲取單元格類型
/// </summary>
/// <param name="cell"></param>
/// <returns></returns>
private static object GetValueType(ICell cell)
{
if (cell == null)
return null;
switch (cell.CellType)
{
case CellType.Blank: //BLANK:
return null;
case CellType.Boolean: //BOOLEAN:
return cell.BooleanCellValue;
case CellType.Numeric: //NUMERIC:
if (DateUtil.IsCellDateFormatted(cell))
{
return cell.DateCellValue;
}
else
{
return cell.NumericCellValue;
}
short format = cell.CellStyle.DataFormat;
if (format != 0) { return cell.DateCellValue; } else { return cell.NumericCellValue; }
case CellType.String: //STRING:
return cell.StringCellValue;
case CellType.Error: //ERROR:
return cell.ErrorCellValue;
case CellType.Formula: //FORMULA:
default:
return "=" + cell.CellFormula;
}
}
/// <summary>
/// Datable導出成Excel
/// </summary>
/// <param name="dt">需要導出的datatable</param>
/// <param name="file">導出路徑(包括文件名與擴展名)</param>
public static void DataTableToExcel(DataTable dt, string file = "", bool isShowResult = true)
{
IWorkbook workbook;
if (file == "")
{
System.Windows.Forms.SaveFileDialog sfd = new System.Windows.Forms.SaveFileDialog();
sfd.Filter = "Excel 2007-13文件(*.xlsx)|*.xlsx|Excel 2003文件(*.xls)|*.xls";
sfd.DefaultExt = "xlsx";
sfd.AddExtension = true;
if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
file = sfd.FileName;
}
else
{
return;
}
}
string fileExt = Path.GetExtension(file).ToLower();
if (fileExt == ".xlsx")
{
workbook = new XSSFWorkbook();
}
else if (fileExt == ".xls")
{
workbook = new HSSFWorkbook();
}
else
{
workbook = null;
}
if (workbook == null)
{
return;
}
ISheet sheet = string.IsNullOrEmpty(dt.TableName) ? workbook.CreateSheet("Sheet1") : workbook.CreateSheet(dt.TableName);
//表頭
IRow row = sheet.CreateRow(0);
for (int i = 0; i < dt.Columns.Count; i++)
{
ICell cell = row.CreateCell(i);
cell.SetCellValue(dt.Columns[i].ColumnName);
}
//數據
for (int i = 0; i < dt.Rows.Count; i++)
{
IRow row1 = sheet.CreateRow(i + 1);
for (int j = 0; j < dt.Columns.Count; j++)
{
ICell cell = row1.CreateCell(j);
cell.SetCellValue(dt.Rows[i][j].ToString());
}
}
//轉爲字節數組
MemoryStream stream = new MemoryStream();
workbook.Write(stream);
var buf = stream.ToArray();
//保存爲Excel文件
using (FileStream fs = new FileStream(file, FileMode.Create, FileAccess.Write))
{
fs.Write(buf, 0, buf.Length);
fs.Flush();
if (isShowResult)
{
System.Windows.MessageBox.Show("保存成功!");
}
}
}
}
public class CSVHelper
{
/// <summary>
/// 寫入CSV文件
/// </summary>
/// <param name="dt">DataTable</param>
/// <param name="fileName">文件全名</param>
/// <returns>是否寫入成功</returns>
public static bool SaveCSV(DataTable dt, string fullFileName = "")
{
if (fullFileName == "")
{
System.Windows.Forms.SaveFileDialog sfd = new System.Windows.Forms.SaveFileDialog();
sfd.Filter = "CSV文件(*.csv)|*.csv";
sfd.DefaultExt = "csv";
if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
fullFileName = sfd.FileName;
}
else
{
return false;
}
}
try
{
FileStream fs = new FileStream(fullFileName, System.IO.FileMode.Create, System.IO.FileAccess.Write);
StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.Default);
string data = "";
//寫出列名稱
for (int i = 0; i < dt.Columns.Count; i++)
{
data += dt.Columns[i].ColumnName.ToString();
if (i < dt.Columns.Count - 1)
{
data += ",";
}
}
sw.WriteLine(data);
//寫出各行數據
for (int i = 0; i < dt.Rows.Count; i++)
{
data = "";
for (int j = 0; j < dt.Columns.Count; j++)
{
data += dt.Rows[i][j].ToString();
if (j < dt.Columns.Count - 1)
{
data += ",";
}
}
sw.WriteLine(data);
}
sw.Close();
fs.Close();
return true;
}
catch (Exception e)
{
System.Windows.MessageBox.Show(e.Message);
return false;
}
}
/// <summary>
/// 打開CSV 文件
/// </summary>
/// <param name="fileName">文件全名</param>
/// <returns>DataTable</returns>
public static DataTable OpenCSV(string fileName = "")
{
if (fileName == "")
{
System.Windows.MessageBox.Show("目標CSV文件不存在,請手動選擇數據文件.");
System.Windows.Forms.OpenFileDialog ofd = new System.Windows.Forms.OpenFileDialog();
ofd.Filter = "CSV文件(*.csv)|*.csv";
ofd.DefaultExt = "csv";
if (ofd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
fileName = ofd.FileName;
return OpenCSV(fileName, 0, 0, 0, 0, true);
}
else
{
return null;
}
}
else
{
try
{
return OpenCSV(fileName, 0, 0, 0, 0, true);
}
catch (Exception e)
{
System.Windows.MessageBox.Show(e.Message);
return null;
}
}
}
/// <summary>
/// 打開CSV 文件
/// </summary>
/// <param name="fileName">文件全名</param>
/// <param name="firstRow">開始行</param>
/// <param name="firstColumn">開始列</param>
/// <param name="getRows">獲取多少行</param>
/// <param name="getColumns">獲取多少列</param>
/// <param name="haveTitleRow">是有標題行</param>
/// <returns>DataTable</returns>
public static DataTable OpenCSV(string fullFileName, Int16 firstRow = 0, Int16 firstColumn = 0, Int16 getRows = 0, Int16 getColumns = 0, bool haveTitleRow = true)
{
DataTable dt = new DataTable();
FileStream fs = new FileStream(fullFileName, System.IO.FileMode.Open, System.IO.FileAccess.Read);
StreamReader sr = new StreamReader(fs, System.Text.Encoding.Default);
//記錄每次讀取的一行記錄
string strLine = "";
//記錄每行記錄中的各字段內容
string[] aryLine;
//標示列數
int columnCount = 0;
//是否已建立了表的字段
bool bCreateTableColumns = false;
//第幾行
int iRow = 1;
//去除無用行
if (firstRow > 0)
{
for (int i = 1; i < firstRow; i++)
{
sr.ReadLine();
}
}
// { ",", ".", "!", "?", ";", ":", " " };
string[] separators = { "," };
//逐行讀取CSV中的數據
while ((strLine = sr.ReadLine()) != null)
{
strLine = strLine.Trim();
aryLine = strLine.Split(separators, System.StringSplitOptions.RemoveEmptyEntries);
if (bCreateTableColumns == false)
{
bCreateTableColumns = true;
columnCount = aryLine.Length;
//創建列
for (int i = firstColumn; i < (getColumns == 0 ? columnCount : firstColumn + getColumns); i++)
{
DataColumn dc
= new DataColumn(haveTitleRow == true ? aryLine[i] : "COL" + i.ToString());
dt.Columns.Add(dc);
}
bCreateTableColumns = true;
if (haveTitleRow == true)
{
continue;
}
}
DataRow dr = dt.NewRow();
//for (int j = firstColumn; j < (getColumns == 0 ? columnCount : firstColumn + getColumns); j++)
//{
// dr[j - firstColumn] = aryLine[j];
//}
for (int j = firstColumn; j < aryLine.Length; j++)
{
dr[j - firstColumn] = aryLine[j];
}
dt.Rows.Add(dr);
iRow = iRow + 1;
if (getRows > 0)
{
if (iRow > getRows)
{
break;
}
}
}
sr.Close();
fs.Close();
return dt;
}
}
