.NET使用NPOI实现读取带有图片的excel数据

admin ASP.NET

2024-04-16 0 431

前言

在.net使用npoi插件进行批量导入时，获取excel中的图片数据，存到集合中。

使用步骤

1.定义类PictureData

代码如下：

public class PictureData
{
public byte[] Data { get; set; }
}

2.数据集引用

using NPOI.XSSF.UserModel;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel.Extensions;

npoi插件需要自己下载。

3.定义获取excel图片数据的方法GetDTWithImg

/// <summary>
/// 获取excel中图片数据
/// </summary>
/// <param name=\”path\”>文件路径</param>
/// <returns>list</returns>
private List<PictureData> GetDTWithImg(string path)
{
using (FileStream file = new FileStream(path, FileMode.Open, FileAccess.Read))
{
IWorkbook workbook = null;
ISheet sheet = null;

workbook = WorkbookFactory.Create(file);
sheet = workbook.GetSheet(\”Sheet1\”);
if (sheet == null)
{
sheet = workbook.GetSheetAt(0);
}

// 获取绘图对象
XSSFDrawing drawing = (XSSFDrawing)sheet.CreateDrawingPatriarch();
List<XSSFPicture> picturesInColumnA = new List<XSSFPicture>();
List<XSSFShape> shapes = drawing.GetShapes();
foreach (XSSFShape shape in shapes)
{
if (shape is XSSFPicture)
{
XSSFPicture picture = (XSSFPicture)shape;
XSSFClientAnchor anchor = (XSSFClientAnchor)picture.GetPreferredSize();
picturesInColumnA.Add(picture);
}
}
List<PictureData> pictureDataList = new List<PictureData>();
//将图片数据放到集合中
foreach (XSSFPicture picture in picturesInColumnA)
{
byte[] pictureData = picture.PictureData.Data;
PictureData data = new PictureData
{
Data = pictureData
};
pictureDataList.Add(data);
}
return pictureDataList;
}