public static System.Data.DataTable GetDataTable(string fileName, string sheetName, bool firstRowIsColumnHead, int maxColumnCount, int startColumnIndex, int startRowIndex)
{
NPOI.SS.UserModel.IWorkbook iWorkbook = Extension.NPOIMethod.GetWorkbookFromExcelFile(fileName);
if (iWorkbook == null)
{
return(null);
}
NPOI.SS.UserModel.ISheet iSheet = iWorkbook.GetSheet(sheetName);
return(GetDataTable(iSheet, firstRowIsColumnHead, maxColumnCount, startColumnIndex, startRowIndex));
}
public static System.Data.DataTable GetDataTableFromExcelFile(string fileName, string sheetName, int startRowIndex, int startColumnIndex, bool firstRowIsColumnHead = true, bool autoAddColumn = false, bool ignoreBlankRow = true)
{
NPOI.SS.UserModel.IWorkbook workbook = GetWorkbookFromExcelFile(fileName);
if (workbook == null)
{
return(null);
}
NPOI.SS.UserModel.ISheet sheet = workbook.GetSheet(sheetName);
if (sheet == null)
{
return(null);
}
return(GetDataTableFromSheet(sheet, startRowIndex, startColumnIndex, firstRowIsColumnHead, autoAddColumn, ignoreBlankRow));
}
public static System.Data.DataTable GetDataTableFromExcelFile(string fileName, string sheetName, int startRowIndex, int startColumnIndex, bool ignoreBlankRow, params string[] columnHeadNames)
{
NPOI.SS.UserModel.IWorkbook workbook = GetWorkbookFromExcelFile(fileName);
if (workbook == null)
{
return(null);
}
NPOI.SS.UserModel.ISheet sheet = workbook.GetSheet(sheetName);
if (sheet == null)
{
return(null);
}
System.Data.DataTable dataTable = new System.Data.DataTable(sheet.SheetName);
for (int i = 0; i < columnHeadNames.Length; i++)
{
dataTable.Columns.Add(columnHeadNames[i]);
}
if (columnHeadNames.Length > 0)
{
for (int rowIndex = startRowIndex; rowIndex < sheet.PhysicalNumberOfRows; rowIndex++)
{
NPOI.SS.UserModel.IRow row = sheet.GetRow(rowIndex);
if (row != null)
{
System.Data.DataRow dataRow = dataTable.NewRow();
dataTable.Rows.Add(dataRow);
int dataTableColumnIndex = 0;
for (int columnIndex = startColumnIndex; columnIndex < row.PhysicalNumberOfCells; columnIndex++)
{
if (dataTableColumnIndex >= dataTable.Columns.Count)
{
break;
}
dataRow[dataTableColumnIndex] = GetCellValue(row.GetCell(columnIndex));
dataTableColumnIndex++;
}
}
}
}
return(dataTable);
}
/// <summary>
/// 将excel文件内容读取到DataTable数据表中
/// </summary>
/// <param name="fileName">文件完整路径名</param>
/// <param name="sheetName">指定读取excel工作薄sheet的名称</param>
/// <param name="isFirstRowColumn">第一行是否是DataTable的列名：true=是，false=否</param>
/// <returns>DataTable数据表</returns>
public static DataTable ReadExcelToDataTable(string fileName, string sheetName = null, bool isFirstRowColumn = true)
{
//定义要返回的datatable对象
DataTable data = new DataTable();
//excel工作表
NPOI.SS.UserModel.ISheet sheet = null;
//数据开始行(排除标题行)
int startRow = 0;
try
{
if (!File.Exists(fileName))
{
return(null);
}
//根据指定路径读取文件
FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
//根据文件流创建excel数据结构
NPOI.SS.UserModel.IWorkbook workbook = NPOI.SS.UserModel.WorkbookFactory.Create(fs);
//IWorkbook workbook = new HSSFWorkbook(fs);
//如果有指定工作表名称
if (!string.IsNullOrEmpty(sheetName))
{
sheet = workbook.GetSheet(sheetName);
//如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
if (sheet == null)
{
sheet = workbook.GetSheetAt(0);
}
}
else
{
//如果没有指定的sheetName，则尝试获取第一个sheet
sheet = workbook.GetSheetAt(0);
}
if (sheet != null)
{
NPOI.SS.UserModel.IRow firstRow = sheet.GetRow(0);
//一行最后一个cell的编号 即总的列数
int cellCount = firstRow.LastCellNum;
//如果第一行是标题列名
if (isFirstRowColumn)
{
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
NPOI.SS.UserModel.ICell cell = firstRow.GetCell(i);
cell.SetCellType(NPOI.SS.UserModel.CellType.String);
if (cell != null)
{
string cellValue = cell.StringCellValue;
if (cellValue != null)
{
DataColumn column = new DataColumn(cellValue);
data.Columns.Add(column);
}
}
}
startRow = sheet.FirstRowNum + 1;
}
else
{
startRow = sheet.FirstRowNum;
}
//最后一列的标号
int rowCount = sheet.LastRowNum;
for (int i = startRow; i <= rowCount; ++i)
{
NPOI.SS.UserModel.IRow row = sheet.GetRow(i);
if (row == null)
{
continue; //没有数据的行默认是null
}
DataRow dataRow = data.NewRow();
for (int j = row.FirstCellNum; j < cellCount; ++j)
{
if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null
{
dataRow[j] = row.GetCell(j).ToString();
}
}
data.Rows.Add(dataRow);
}
}
return(data);
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// 将excel中的数据导入到DataTable中
/// </summary>
/// <param name="sheetName">excel工作薄sheet的名称</param>
/// <param name="isFirstRowColumn">第一行是否是DataTable的列名</param>
/// <returns>返回的DataTable</returns>
/// <author>范永坚 2017-08-09</author>
public DataTable ExcelToDataTable(string sheetName, bool isFirstRowColumn)
{
NPOI.SS.UserModel.ISheet sheet = null;
var data = new DataTable();
data.TableName = sheetName;
int startRow = 0;
try
{
sheet = sheetName != null?_workbook.GetSheet(sheetName) : _workbook.GetSheetAt(0);
if (sheet != null)
{
var firstRow = sheet.GetRow(0);
if (firstRow == null)
{
return(data);
}
int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数
startRow = isFirstRowColumn ? sheet.FirstRowNum + 1 : sheet.FirstRowNum;
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
//.StringCellValue;
var column = new DataColumn(Convert.ToChar(((int)'A') + i).ToString());
if (isFirstRowColumn)
{
var columnName = firstRow.GetCell(i).StringCellValue;
column = new DataColumn(columnName);
}
data.Columns.Add(column);
}
//最后一列的标号
int rowCount = sheet.LastRowNum;
for (int i = startRow; i <= rowCount; ++i)
{
NPOI.SS.UserModel.IRow row = sheet.GetRow(i);
if (row == null)
{
continue; //没有数据的行默认是null
}
DataRow dataRow = data.NewRow();
for (int j = row.FirstCellNum; j < cellCount; ++j)
{
if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null
{
dataRow[j] = row.GetCell(j, NPOI.SS.UserModel.MissingCellPolicy.RETURN_NULL_AND_BLANK).ToString();
}
}
data.Rows.Add(dataRow);
}
}
else
{
throw new Exception("Don not have This Sheet");
}
return(data);
}
catch (Exception ex)
{
Console.WriteLine("Exception: " + ex.Message);
return(null);
}
}
