C#：导入Excel通用类（Xlsx格式）
2024-10-09 11:35:25
- 一、引用插件EPPlus.dll
插件下载地址：https://pan.baidu.com/s/1jEl7iu1H_C7-j9Wq37xIRQ 提取密码：pdy6
- 二、定义通用类XlsxExcelData.cs
public class XlsxExcelData:IExcelData
{
#region 属性值
private Dictionary<string, DataTable> m_tableDic;
public Dictionary<string, DataTable> DataTableDictionary
{
get { return m_tableDic; }
}
public List<string> SheetNames
{
get
{
if (m_tableDic == null)
return null;
return m_tableDic.Keys.ToList();
}
}
public List<DataTable> DataTableList
{
get
{
if (m_tableDic == null)
return null;
return m_tableDic.Values.ToList();
}
}
public int SheetCount
{
get
{
if (m_tableDic == null)
return ;
return SheetNames.Count;
}
}
private string m_filePath;
public string FilePath
{
get { return m_filePath; }
}
private Stream m_stream;
public Stream ExcelStream
{
get { return m_stream; }
}
public ExcelType ExcelType
{
get { return Interface.ExcelType.xlsx; }
}
#endregion
#region 构造
public XlsxExcelData(string path)
{
m_filePath = path;
}
public XlsxExcelData(Stream stream)
{
m_stream = stream;
}
#endregion
#region 方法
public List<Dictionary<string, string>> DataTableToDictionary(DataTable dt)
{
List<Dictionary<String, String>> dicList = new List<Dictionary<string, string>>();
foreach (DataRow row in dt.Rows)
{
Dictionary<String, String> dic = new Dictionary<String, String>();
foreach (DataColumn col in dt.Columns)
{
dic.Add(col.ColumnName, row[col].ToString());
}
dicList.Add(dic);
}
return dicList;
} /// <summary>
/// 执行方法
/// </summary>
public void Load()
{
if (m_filePath != null)
Load(m_filePath);
else
Load(m_stream);
} /// <summary>
/// 执行方法
/// </summary>
/// <param name="path">文件路径</param>
public void Load(string path)
{
m_filePath = path;
ExcelPackage package = null;
try
{
using (FileStream fs=File.Open(path,FileMode.OpenOrCreate,FileAccess.Read))
{
package = new ExcelPackage(fs);
}
}
catch
{
throw;
}
LoadExcel(package);
package.Dispose();
} /// <summary>
/// 执行方法
/// </summary>
/// <param name="stream">文件流</param>
private void Load(Stream stream)
{
m_stream = stream;
ExcelPackage package = null;
try
{
package = new ExcelPackage(stream);
}
catch
{
throw;
}
LoadExcel(package);
package.Dispose();
} /// <summary>
/// 获取Excel对应字典
/// </summary>
/// <param name="package"></param>
private void LoadExcel(ExcelPackage package)
{
m_tableDic = new Dictionary<string, DataTable>();
var sheets = package.Workbook.Worksheets.GetEnumerator();
while (sheets.MoveNext())
{
DataTable dt = new DataTable();
var sheet = sheets.Current;
string name = sheet.Name;
if (sheet.Dimension!=null)
{
for (int i = ; i <=sheet.Dimension.Columns ; i++)
{
string header = ExcelHeaderGenerator.GetExcelHeader(i);
DataColumn col = new DataColumn(header);
dt.Columns.Add(col);
}
for (int i = ; i <= sheet.Dimension.Rows ; i++)
{
try
{
ExcelRow excelRow = sheet.Row(i);
DataRow dRow = dt.NewRow();
for (int j = ; j <=sheet.Dimension.Columns; j++)
{
ExcelRange range = sheet.Cells[i, j];
if (string.IsNullOrEmpty(range.Text))
{
dRow[j - ] = string.Empty;
}
else
{
dRow[j - ] = range.Text;
}
}
dt.Rows.Add(dRow);
}
catch (Exception e)
{
throw;
}
}
}
m_tableDic.Add(name, dt);
}
} /// <summary>
/// 获取第一列
/// </summary>
/// <returns></returns>
public List<Dictionary<string, string>> GetFirstRecords()
{
List<Dictionary<string, string>> result = new List<Dictionary<string, string>>();
DataTable dt = GetDataTable(, );
foreach (DataRow row in dt.Rows)
{
Dictionary<string, string> dic = new Dictionary<string, string>();
foreach (DataColumn column in dt.Columns)
{
dic.Add(column.ColumnName, row[column].ToString());
}
result.Add(dic);
}
return result;
} /// <summary>
/// 获取DataTable
/// </summary>
/// <param name="sheetIndex">工作薄索引</param>
/// <param name="columnNum">列数</param>
/// <returns></returns>
public DataTable GetDataTable(int sheetIndex, int columnNum)
{
DataTable dt = GetDataTable(sheetIndex);
Convert(columnNum, ref dt);
return dt;
} /// <summary>
/// 获取DataTable
/// </summary>
/// <param name="sheetIndex">工作薄索引</param>
/// <returns></returns>
public DataTable GetDataTable(int sheetIndex)
{
if (m_tableDic == null)
return null;
if (sheetIndex >= SheetCount)
throw new Exception("表格索引超出序列，当前索引数量为" + SheetCount);
DataTable dt = DataTableList[sheetIndex];
DataTable dt_copy = new DataTable();
foreach (DataColumn col in dt.Rows)
{
dt_copy.Columns.Add(new DataColumn(col.ColumnName));
}
foreach (DataRow row in dt.Rows)
{
DataRow r = dt_copy.NewRow();
r.ItemArray = row.ItemArray;
dt_copy.Rows.Add(r);
}
return dt_copy;
} /// <summary>
/// 检测重复列
/// </summary>
/// <param name="colNum">列数</param>
/// <param name="dt">DataTable</param>
private void Convert(int colNum, ref DataTable dt)
{
if (colNum < )
throw new Exception("指定作为标题的行数必须是大于0");
if (colNum > dt.Rows.Count)
throw new Exception("指定作为标题的行数不能大于表格的总行数" + dt.Rows.Count);
List<string> columnArray = new List<string>();
for (int i = ; i < dt.Columns.Count; i++)
{
if (columnArray.Contains(dt.Rows[colNum - ].ItemArray[i].ToString()))
throw new Exception("指定为DataTable标题的行不能存在重复值，重复值为" + dt.Rows[colNum - ].ItemArray[i].ToString());
columnArray.Add(dt.Rows[colNum - ].ItemArray[i].ToString());
}
int r = ;
for (int i = ; i < colNum; i++)
{
dt.Rows.RemoveAt(i - r);
r++;
}
for (int i = ; i < columnArray.Count; i++)
{
dt.Columns[i].ColumnName = columnArray[i];
}
}
#endregion
}
原著：清风一人醉http://www.cnblogs.com/W--Jing/
以上方法可以个人分享研究！
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