NPOI API: http://www.cnblogs.com/atao/archive/2009/11/15/1603528.html
http://blog.csdn.net/pan_junbiao/article/details/39717443 -- NPOI使用手册
http://www.cnblogs.com/wei325/p/4748324.html
每一张表只能有一个HSSFPatriarch对象，如果把它的创建放到了setPic方法中，那么一行只会出现一张图片，最后的图片会消掉之前的图片。也不能放到for循环里
HSSFClientAnchor(dx1,dy1,dx2,dy2,col1,row1,col2,row2)的参数，有必要在这里说明一下：
dx1：起始单元格的x偏移量，如例子中的255表示直线起始位置距A1单元格左侧的距离；
dy1：起始单元格的y偏移量，如例子中的125表示直线起始位置距A1单元格上侧的距离；
dx2：终止单元格的x偏移量，如例子中的1023表示直线起始位置距C3单元格左侧的距离；
dy2：终止单元格的y偏移量，如例子中的150表示直线起始位置距C3单元格上侧的距离；
col1：起始单元格列序号，从0开始计算；
row1：起始单元格行序号，从0开始计算，如例子中col1=0,row1=0就表示起始单元格为A1；
col2：终止单元格列序号，从0开始计算；
row2：终止单元格行序号，从0开始计算，如例子中col2=2,row2=2就表示起始单元格为C3；
//添加多个图片时:多个pic应该share同一个DrawingPatriarch在同一个sheet里面。
//获取枚举类型的Display特性的name值
public string GetEnumTxt(Enum eEnum)
{
var enumType = eEnum.GetType();
var field = enumType.GetField(eEnum.ToString());
var display = field.GetCustomAttributes(typeof(DisplayAttribute), false).FirstOrDefault() as DisplayAttribute;
return display != null ? display.Name : eEnum.ToString();
}
private void setPic(HSSFWorkbook workbook, HSSFPatriarch patriarch,string path, ISheet sheet, int rowline, int col)
{
if(string.IsNullOrEmpty(path))return;
byte[] bytes = System.IO.File.ReadAllBytes(Server.MapPath(path));
int pictureIdx = workbook.AddPicture(bytes, PictureType.JPEG);
// 插图片的位置 HSSFClientAnchor（dx1,dy1,dx2,dy2,col1,row1,col2,row2) 后面再作解释
HSSFClientAnchor anchor = new HSSFClientAnchor(70, 10, 0, 0, col, rowline, col+1, rowline + 1);
//把图片插到相应的位置
HSSFPicture pict = (HSSFPicture)patriarch.CreatePicture(anchor, pictureIdx);
}
private void setPic(HSSFWorkbook workbook, HSSFPatriarch patriarch,string path, ISheet sheet, int rowline, int col)
{
if(string.IsNullOrEmpty(path))return;
byte[] bytes = System.IO.File.ReadAllBytes(Server.MapPath(path));
int pictureIdx = workbook.AddPicture(bytes, PictureType.JPEG);
// 插图片的位置 HSSFClientAnchor（dx1,dy1,dx2,dy2,col1,row1,col2,row2) 后面再作解释
HSSFClientAnchor anchor = new HSSFClientAnchor(70, 10, 0, 0, col, rowline, col+1, rowline + 1);
//把图片插到相应的位置
HSSFPicture pict = (HSSFPicture)patriarch.CreatePicture(anchor, pictureIdx);
}
导出多个sheet,一列图片
/// <summary>
/// 导出EXCEL,可以导出多个sheet(图片)
/// </summary>
/// <param name="dtSources">sheet数据源</param>
/// <param name="lstColname">sheet列名数据</param>
/// <param name="sheetname">sheet名</param>
/// <param name="filename">文件名</param>
/// <param name="mColImage">图像列</param>
/// <returns></returns>
public static string ExporMultiSheetImage(List<DataTable> dtSources, List<List<string>> lstColname, List<string> sheetname, string filename,int mColImage)
{
//创建工作薄
IWorkbook workbook = new HSSFWorkbook();
string FileName = filename + ".xls";
for (int k = 0; k < dtSources.Count; k++)
{
//DataTable dt = dtSources[k];
int iSheetCount = Convert.ToInt32(Math.Ceiling(Convert.ToDouble(dtSources[k].Rows.Count) / 10000));
iSheetCount = iSheetCount == 0 ? 1 : iSheetCount;
for (int iSheetIndex = 0; iSheetIndex < iSheetCount; iSheetIndex++)
{
#region 图最大列
int mImageColMerage = 0; // 图最大列
Dictionary<int, List<string>> dicImagePath = new Dictionary<int, List<string>>();
if (mColImage > -1)
{
List<int> lstImageColLen = new List<int>();
for (int i = iSheetIndex * 10000; i < dtSources[k].Rows.Count; i++)
{
List<string> lstImagePath = dtSources[k].Rows[i][mColImage].ToString().Trim(‘,‘).Split(new char[] { ‘,‘ }, StringSplitOptions.RemoveEmptyEntries).ToList();
dicImagePath[i] = lstImagePath;
lstImageColLen.Add(lstImagePath.Count());
}
mImageColMerage = lstImageColLen.Max();
}
#endregion
//create sheet
string sheetName = string.Empty;
if (iSheetCount>1)
{
sheetName = sheetname[k] + iSheetIndex;
}
else
{
sheetName = sheetname[k];
}
ISheet sheet = workbook.CreateSheet(sheetName);
sheet.PrintSetup.Landscape = true; //是否横向排版
sheet.FitToPage = false; //是否自适应页面
sheet.PrintSetup.Scale = 50; //缩放比例
//填充列标题以及样式
int rowsNum = 0; //行号
IRow headerRow = sheet.CreateRow(rowsNum);
ICellStyle headStyle = workbook.CreateCellStyle();
headStyle.Alignment = HorizontalAlignment.CENTER;
headerRow.HeightInPoints = 20;
headStyle.VerticalAlignment = VerticalAlignment.CENTER;
//换行
//headStyle.WrapText = true;
IFont font = workbook.CreateFont();
font.FontHeightInPoints = 13;
font.Boldweight = 700;
headStyle.SetFont(font);
for (int i = 0; i < lstColname[k].Count; i++)
{
if (i < mColImage)
{
//合并列前
headerRow.CreateCell(i, CellType.STRING).SetCellValue(lstColname[k][i]);
headerRow.GetCell(i).CellStyle = headStyle;
}
else if (mColImage > -1 && i == mColImage)
{
headerRow.CreateCell(i, CellType.STRING).SetCellValue(lstColname[k][i]);
headerRow.GetCell(i).CellStyle = headStyle;
sheet.AddMergedRegion(new CellRangeAddress(0, 0, mColImage, mColImage + mImageColMerage));
}
else
{
//合并列后
headerRow.CreateCell(i + mImageColMerage, CellType.STRING).SetCellValue(lstColname[k][i]);
headerRow.GetCell(i + mImageColMerage).CellStyle = headStyle;
}
//sheet.AutoSizeColumn(i);
sheet.SetColumnWidth(i, 5000); //列宽
//headerRow.Cells[i].SetCellValue(new HSSFRichTextString("\r\n")); //强制换行
}
ICellStyle cellStyle = workbook.CreateCellStyle();
cellStyle.Alignment = HorizontalAlignment.CENTER;
cellStyle.VerticalAlignment = VerticalAlignment.CENTER;
IFont cellfont = workbook.CreateFont();
cellfont.FontHeightInPoints = 10;
cellStyle.SetFont(cellfont);
cellStyle.WrapText = true;
#region MyRegion
//填充数据行
IRow dataRow = null;
rowsNum = 1; //行号，从第2行开始
/// patriarch 画图的顶级管理器，一个sheet只能获取一个（一定要注意这点）
HSSFPatriarch patriarch = (HSSFPatriarch)sheet.CreateDrawingPatriarch();
//填充内容
for (int i = iSheetIndex * 10000; i < dtSources[k].Rows.Count; i++)
{
dataRow = sheet.CreateRow(i + 1);
for (int j = 0; j < dtSources[k].Columns.Count; j++)
{
//sheet.SetColumnWidth(j, 5000);
//sheet.AutoSizeColumn(j);
if (j < mColImage)
{
//合并列前
dataRow.CreateCell(j).SetCellValue(dtSources[k].Rows[i][j].ToString());
dataRow.GetCell(j).CellStyle = cellStyle;
}
else if (mColImage > -1 && j == mColImage)
{
int mImgIndex = 0;
foreach (var item in dicImagePath[i])
{
string imgPath = HttpContext.Current.Server.MapPath(item);
if (File.Exists(imgPath))
{
byte[] bytes = System.IO.File.ReadAllBytes(imgPath);
int pictureIdx = workbook.AddPicture(bytes, PictureType.JPEG);
///// patriarch 画图的顶级管理器，一个sheet只能获取一个（一定要注意这点）
//HSSFPatriarch patriarch = (HSSFPatriarch)sheet.CreateDrawingPatriarch();
// 插图片的位置 HSSFClientAnchor（dx1,dy1,dx2,dy2,col1,row1,col2,row2)
//图片左上角为（col, row）第row+1行col+1列，右下角为（ col +1, row +1）第 col +1+1行row +1+1列，宽为100，高为50
HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 1000, 250, mColImage + mImgIndex, i + 1, mColImage + mImgIndex, i + 1);
//把图片插到相应的位置
HSSFPicture pict = (HSSFPicture)patriarch.CreatePicture(anchor, pictureIdx);
//pict.Resize(0.7); //用图片原始大小来显示
}
mImgIndex++;
}
dataRow.CreateCell(j).SetCellValue("");
dataRow.GetCell(j).CellStyle = cellStyle;
sheet.AddMergedRegion(new CellRangeAddress(i + 1, i + 1, mColImage, mColImage + mImageColMerage));
}
else
{
//合并列后
dataRow.CreateCell(j + mImageColMerage).SetCellValue(dtSources[k].Rows[i][j].ToString());
dataRow.GetCell(j + mImageColMerage).CellStyle = cellStyle;
}
}
}
#endregion
}
}
string strPhysicsPath = HttpContext.Current.Server.MapPath(Config.AccPath + "Temp/Export");
if (!Directory.Exists(strPhysicsPath))
{
Directory.CreateDirectory(strPhysicsPath);
}
//string resultUrl = Config.LogPath.Replace("~", HttpContext.Current.Request.Url.Host + ":" + HttpContext.Current.Request.Url.Port) + "Temp/" + DateTime.Today.Year;
string tempUrl = "/" + DateTime.Today.ToString("MMdd-") + Guid.NewGuid().ToString() + ".xls";
strPhysicsPath = strPhysicsPath.TrimEnd(‘\\‘) + tempUrl;
//-------
using (MemoryStream ms = new MemoryStream())
{
ms.Flush();
ms.Position = 0;
workbook.Write(ms);
using (FileStream fs = new FileStream(strPhysicsPath, FileMode.Create, FileAccess.Write))
{
byte[] fData = ms.ToArray();
fs.Write(fData, 0, fData.Length);
fs.Flush();
}
LogHelper.WriteExportLog(filename);
return Config.AccPath.Replace("~", "") + "Temp/Export" + tempUrl;
}
#region 浏览器下载
//供浏览器下载Excel
//if (HttpContext.Current.Request.Browser.Browser == "IE")
// FileName = HttpUtility.UrlEncode(FileName);
//using (MemoryStream ms = new MemoryStream())
//{
// ms.Position = 0;
// workbook.Write(ms);
// ms.Flush();
// HttpContext curContext = HttpContext.Current;
// // 设置编码和附件格式
// curContext.Response.ContentType = "application/vnd.ms-excel";
// curContext.Response.ContentEncoding = Encoding.UTF8;
// curContext.Response.Charset = "";
// curContext.Response.AppendHeader("Content-Disposition",
// "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8));
// curContext.Response.BinaryWrite(ms.GetBuffer());
// ms.Close();
// ms.Dispose();
// curContext.Response.End();
//}
#endregion
}
导出EXCEL,可以导出多个sheet
/// <summary>
/// 导出EXCEL,可以导出多个sheet
/// </summary>
/// <param name="dtSources">原始数据数组类型</param>
/// <param name="strFileName">路径</param>
public static string ExporMultiSheet(DataTable[] dtSources, List<List<string>> lstname, List<string> sheetname, string filename)
{
//创建工作薄
IWorkbook workbook = new HSSFWorkbook();
string FileName = filename + ".xls";
for (int k = 0; k < dtSources.Length; k++)
{
ISheet sheet = workbook.CreateSheet(sheetname[k]);
//设置列宽
sheet.SetColumnWidth(0, 30 * 256);
sheet.SetColumnWidth(1, 30 * 256);
sheet.SetColumnWidth(2, 20 * 256);
sheet.SetColumnWidth(3, 20 * 256);
sheet.SetColumnWidth(4, 20 * 256);
sheet.SetColumnWidth(5, 25 * 256);
//填充表头
//填充列标题以及样式
int rowsNum = 0; //行号
IRow headerRow = sheet.CreateRow(rowsNum);
ICellStyle headStyle = workbook.CreateCellStyle();
headStyle.Alignment = HorizontalAlignment.CENTER;
headStyle.VerticalAlignment = VerticalAlignment.CENTER;
//换行
headStyle.WrapText = true;
headerRow.HeightInPoints = 20;
IFont font = workbook.CreateFont();
font.FontHeightInPoints = 13;
font.Boldweight = 700;
headStyle.SetFont(font);
for (int i = 0; i < lstname[k].Count; i++)
{
headerRow.CreateCell(i, CellType.STRING).SetCellValue(lstname[k][i]);
headerRow.GetCell(i).CellStyle = headStyle;
//headerRow.Cells[i].SetCellValue(new HSSFRichTextString("\r\n")); //强制换行
}
ICellStyle cellStyle = workbook.CreateCellStyle();
cellStyle.Alignment = HorizontalAlignment.CENTER;
cellStyle.VerticalAlignment = VerticalAlignment.CENTER;
IFont cellfont = workbook.CreateFont();
cellfont.FontHeightInPoints = 10;
cellStyle.SetFont(cellfont);
cellStyle.WrapText = true;
//填充数据行
IRow dataRow = null;
rowsNum = 1; //行号，从第2行开始
//填充内容
for (int i = 0; i < dtSources[k].Rows.Count; i++)
{
dataRow = sheet.CreateRow(i + 1);
for (int j = 0; j < dtSources[k].Columns.Count; j++)
{
dataRow.CreateCell(j).SetCellValue(dtSources[k].Rows[i][j].ToString());
dataRow.GetCell(j).CellStyle = cellStyle;
}
}
}
//保存
string strPhysicsPath = HttpContext.Current.Server.MapPath(Config.AccPath + "Temp/Export");
if (!Directory.Exists(strPhysicsPath))
{
Directory.CreateDirectory(strPhysicsPath);
}
string tempUrl = "/" + DateTime.Today.ToString("MMdd-") + Guid.NewGuid().ToString() + ".xls";
strPhysicsPath = strPhysicsPath.TrimEnd(‘\\‘) + tempUrl;
using (MemoryStream ms = new MemoryStream())
{
ms.Flush();
ms.Position = 0;
workbook.Write(ms);
using (FileStream fs = new FileStream(strPhysicsPath, FileMode.Create, FileAccess.Write))
{
byte[] fData = ms.ToArray();
fs.Write(fData, 0, fData.Length);
fs.Flush();
}
LogHelper.WriteExportLog(filename);
return Config.AccPath.Replace("~", "") + "Temp/Export" + tempUrl;
}
}
图片base64形式怎么转为图片
String u = "Base64";
// Base64解码
byte[] b = new BASE64Decoder().decodeBuffer(u);
// 生成图片
String imgName = "echartsPhoto";
String filePath = ServletActionContext.getServletContext().getRealPath("/") + "echarts";
String fileName = filePath +"/"+ imgName +".png";
File file = new File(filePath);
if(!file.exists()){
file.mkdir();
}
OutputStream out = new FileOutputStream(new File(fileName));
out.write(b);18 out.close();
时间： 2024-10-10 07:46:30