RT，对于asp.net导出页面数据到Excel，图片一直是个问题，这里我把我的处理方法分享给大家，用第三方组件NPOI来实现，同时玩玩二维码生成。
首先，新建一个webApplication，添加NPOI引用，这里还要添加一个二维码的dll
添加引用之后，新建一个aspx页面，我取名为QrEncoderPage.aspx
前台页面html源码如下：
[html]
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="QrEncoderPage.aspx.cs"
Inherits="WebQrCodeNet.QrEncoderPage" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="https://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<p>
<asp:GridView ID="gvCardList" runat="server" Width="100%" AutoGenerateColumns="False"
RowStyle-CssClass="DataAlign" OnRowCommand="gvCardList_RowCommand" Style="margin-top: 15px">
<Columns>
<asp:BoundField DataField="CardCode" HeaderText="卡号" SortExpression="CardCode" ReadOnly="True"
ControlStyle-CssClass="text">
<ControlStyle CssClass="text"></ControlStyle>
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" />
</asp:BoundField>
<asp:BoundField DataField="Password" HeaderText="密码" SortExpression="Password" ReadOnly="True"
ControlStyle-CssClass="text">
<ControlStyle CssClass="text"></ControlStyle>
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" />
</asp:BoundField>
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandArgument='<%# Eval("CardCode") %>'
Text="选择"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<RowStyle CssClass="GridViewRowStyle" />
<SelectedRowStyle CssClass="GridViewSelectedRowStyle" />
<PagerTemplate>
</PagerTemplate>
<AlternatingRowStyle CssClass="GridViewAlternatingRowStyle" />
<HeaderStyle CssClass="GridViewHeaderStyle" />
</asp:GridView>
</p>
<p>
<%-- 输入QR code内容：
<asp:TextBox ID="txtContent" runat="server"></asp:TextBox>--%>
<asp:Button ID="btnGenerateCode" runat="server" Text="生成二维码" OnClick="btnGenerateCode_Click" />
</p>
</form>
</body>
</html>
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="QrEncoderPage.aspx.cs"
Inherits="WebQrCodeNet.QrEncoderPage" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="https://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<p>
<asp:GridView ID="gvCardList" runat="server" Width="100%" AutoGenerateColumns="False"
RowStyle-CssClass="DataAlign" OnRowCommand="gvCardList_RowCommand" Style="margin-top: 15px">
<Columns>
<asp:BoundField DataField="CardCode" HeaderText="卡号" SortExpression="CardCode" ReadOnly="True"
ControlStyle-CssClass="text">
<ControlStyle CssClass="text"></ControlStyle>
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" />
</asp:BoundField>
<asp:BoundField DataField="Password" HeaderText="密码" SortExpression="Password" ReadOnly="True"
ControlStyle-CssClass="text">
<ControlStyle CssClass="text"></ControlStyle>
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" />
</asp:BoundField>
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandArgument='<%# Eval("CardCode") %>'
Text="选择"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<RowStyle CssClass="GridViewRowStyle" />
<SelectedRowStyle CssClass="GridViewSelectedRowStyle" />
<PagerTemplate>
</PagerTemplate>
<AlternatingRowStyle CssClass="GridViewAlternatingRowStyle" />
<HeaderStyle CssClass="GridViewHeaderStyle" />
</asp:GridView>
</p>
<p>
<%-- 输入QR code内容：
<asp:TextBox ID="txtContent" runat="server"></asp:TextBox>--%>
<asp:Button ID="btnGenerateCode" runat="server" Text="生成二维码" OnClick="btnGenerateCode_Click" />
</p>
</form>
</body>
</html>
接着，解释后台代码，很简单，我就不解释了，大家应该看的懂，
[csharp]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Gma.QrCodeNet.Encoding;
using System.IO;
using System.Drawing.Imaging;
using System.Drawing;
using NPOI;
using NPOI.HSSF.UserModel;
using Gma.QrCodeNet.Encoding.Windows.Render;
using NPOI.SS.UserModel;
using System.Text;
using NPOI.SS.Util;
using System.Collections;
using System.Text.RegularExpressions;
using NPOI.HPSF;
namespace WebQrCodeNet
{
public partial class QrEncoderPage : System.Web.UI.Page
{
private static readonly string imageBasePath = "D:\\PathConfig\\";
private static readonly string excelBasePath = "D:\\PathConfig\\";
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Bind();
}
}
protected void Bind()
{
//string jsonobjstr = HttpHelper.QueryString("json", "");
List<PrintCard> cards = new List<PrintCard>()
{
new PrintCard{ CardCode="0230010900010336",Password= "123456"},
new PrintCard{ CardCode="0230010900010339",Password="123456"},
new PrintCard{ CardCode="0230010900010340",Password= "123456"},
new PrintCard{ CardCode="0230000900010340",Password= "123456"},
new PrintCard{ CardCode="0230020900010349",Password="123456"}
};
try
{
// cards = JsonHelper.JsonDeserialize<List<Card>>(jsonobjstr);
Session["ListPrintCard"] = cards;
gvCardList.DataSource = cards;
gvCardList.DataBind();
}
catch (Exception ex)
{
Page.ClientScript.RegisterStartupScript(this.GetType(), "key", "<script>alert('" + ex.Message.ToString() + "');</script>");
return;
}
}
public class PrintCard
{
public string CardCode { get; set; }
public string Password { get; set; }
}
/// <summary>
/// 生成二维码
/// </summary>
/// <param name="QrCodeStr">二维码字符串</param>
/// <returns></returns>
public string GetQrCode(string QrCodeStr)
{
string FileName = imageBasePath + Guid.NewGuid().ToString() + ".png";
try
{
QrEncoder qrEncoder = new QrEncoder(ErrorCorrectionLevel.L);
QrCode qrCode = new QrCode();
qrEncoder.TryEncode(QrCodeStr, out qrCode);
GraphicsRenderer renderer = new GraphicsRenderer(new FixedModuleSize(5, QuietZoneModules.Two), Brushes.Black, Brushes.White);
using (FileStream stream = new FileStream(FileName, FileMode.Create))
{
renderer.WriteToStream(qrCode.Matrix, ImageFormat.Png, stream);
}
}
catch (Exception ex)
{
FileName = "";
throw ex;
}
return FileName;
}
protected void btnGenerateCode_Click(object sender, EventArgs e)
{
//GenerateQrCodeNet();
AddPicture();
}
/// <summary>
/// 二维码导出到Excel
/// </summary>
protected void AddPicture()
{
try
{
if (!Directory.Exists(imageBasePath))
{
Directory.CreateDirectory(imageBasePath);
}
if (!Directory.Exists(excelBasePath))
{
Directory.CreateDirectory(excelBasePath);
}
//创建工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
//create sheet
HSSFSheet sheet = (HSSFSheet)workbook.CreateSheet("Sheet1");
string FileName = excelBasePath + DateTime.Now.ToString("yyyyMMddhh24mss") + ".xls";
#region 右击文件 属性信息
//{
// DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
// dsi.Company = "https://....../";
// workbook.DocumentSummaryInformation = dsi;
// SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
// if (HttpContext.Current.Session["realname"] != null)
// {
// si.Author = HttpContext.Current.Session["realname"].ToString();
// }
// else
// {
// if (HttpContext.Current.Session["username"] != null)
// {
// si.Author = HttpContext.Current.Session["username"].ToString();
// }
// } //填加xls文件作者信息
// si.ApplicationName = "NPOI"; //填加xls文件创建程序信息
// si.LastAuthor = "OA系统"; //填加xls文件最后保存者信息
// si.Comments = "OA系统自动创建文件"; //填加xls文件作者信息
// si.Title = "ddd"; //填加xls文件标题信息
// si.Subject = "ddd"; //填加文件主题信息
// si.CreateDateTime = DateTime.Now;
// workbook.SummaryInformation = si;
//}
#endregion
string strQrCodePath = "";
//填充列标题以及样式
int rowsNum = 0; //行号
HSSFRow headerRow = (HSSFRow)sheet.CreateRow(rowsNum);
HSSFCellStyle headStyle = (HSSFCellStyle)workbook.CreateCellStyle();
headStyle.Alignment = (HorizontalAlignment)HorizontalAlignment.CENTER;
headerRow.HeightInPoints = 30;
HSSFFont font = (HSSFFont)workbook.CreateFont();
font.FontHeightInPoints = 13;
font.Boldweight = 700;
headStyle.SetFont(font);
headerRow.CreateCell(0, CellType.STRING).SetCellValue("卡号");
headerRow.CreateCell(1, CellType.STRING).SetCellValue("密码");
headerRow.CreateCell(2, CellType.STRING).SetCellValue("卡二维码");
//合并列头单元格
//CellRangeAddress cellRangeAddress = new CellRangeAddress(0, 0, 2, 4);
//sheet.AddMergedRegion(cellRangeAddress);
//设置列的宽度
for (int columnindex = 0; columnindex < 3; columnindex++)
{
headerRow.GetCell(columnindex).CellStyle = headStyle;
sheet.SetColumnWidth(columnindex, 5000);
}
//填充数据行
HSSFRow row = null;
rowsNum = 1; //行号，从第2行开始
List<PrintCard> list = (List<PrintCard>)Session["ListPrintCard"];
foreach (PrintCard p in list)
{
//写入字段值
row = (HSSFRow)sheet.CreateRow(rowsNum);
HSSFCellStyle cellStyle = (HSSFCellStyle)workbook.CreateCellStyle();
cellStyle.Alignment = (HorizontalAlignment)HorizontalAlignment.CENTER;
row.HeightInPoints = 120;
HSSFFont cellfont = (HSSFFont)workbook.CreateFont();
cellfont.FontHeightInPoints = 10;
cellStyle.SetFont(cellfont);
row.CreateCell(0, CellType.STRING).SetCellValue(p.CardCode);
row.CreateCell(1, CellType.STRING).SetCellValue(p.Password);
row.CreateCell(2, CellType.BLANK).SetCellValue("");
//合并单元格
//CellRangeAddress rowCellRangeAddress = new CellRangeAddress(rowsNum, rowsNum, 2, 4);
//sheet.AddMergedRegion(rowCellRangeAddress);
strQrCodePath = GetQrCode(p.CardCode);
byte[] bytes = System.IO.File.ReadAllBytes(strQrCodePath);
int pictureIdx = workbook.AddPicture(bytes, PictureType.PNG);
// Create the drawing patriarch. This is the top level container for all shapes.
HSSFPatriarch patriarch = (HSSFPatriarch)sheet.CreateDrawingPatriarch();
//add a picture
HSSFClientAnchor anchor = new HSSFClientAnchor(0, 10, 1023, 0, 2, rowsNum, 2, rowsNum);
HSSFPicture pict = (HSSFPicture)patriarch.CreatePicture(anchor, pictureIdx);
pict.Resize();
//设置行的高度
for (int rowindex = 0; rowindex < 3; rowindex++)
{
row.GetCell(rowindex).CellStyle = cellStyle;
}
rowsNum++;
//删除图片文件
if (File.Exists(strQrCodePath))
{
File.Delete(strQrCodePath);
}
}
//供浏览器下载Excel
if (HttpContext.Current.Request.Browser.Browser == "IE")
FileName = HttpUtility.UrlEncode(FileName);
using (MemoryStream ms = new MemoryStream())
{
workbook.Write(ms);
ms.Flush();
ms.Position = 0;
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();
}
}
catch (Exception ex)
{
Page.ClientScript.RegisterStartupScript(this.GetType(), "key", "<script>alert('" + ex.Message.ToString() + "');</script>");
}
}
protected void gvCardList_RowCommand(object sender, GridViewCommandEventArgs e)
{
string cardCode = e.CommandArgument.ToString();
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Gma.QrCodeNet.Encoding;
using System.IO;
using System.Drawing.Imaging;
using System.Drawing;
using NPOI;
using NPOI.HSSF.UserModel;
using Gma.QrCodeNet.Encoding.Windows.Render;
using NPOI.SS.UserModel;
using System.Text;
using NPOI.SS.Util;
using System.Collections;
using System.Text.RegularExpressions;
using NPOI.HPSF;
namespace WebQrCodeNet
{
public partial class QrEncoderPage : System.Web.UI.Page
{
private static readonly string imageBasePath = "D:\\PathConfig\\";
private static readonly string excelBasePath = "D:\\PathConfig\\";
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Bind();
}
}
protected void Bind()
{
//string jsonobjstr = HttpHelper.QueryString("json", "");
List<PrintCard> cards = new List<PrintCard>()
{
new PrintCard{ CardCode="0230010900010336",Password= "123456"},
new PrintCard{ CardCode="0230010900010339",Password="123456"},
new PrintCard{ CardCode="0230010900010340",Password= "123456"},
new PrintCard{ CardCode="0230000900010340",Password= "123456"},
new PrintCard{ CardCode="0230020900010349",Password="123456"}
};
try
{
// cards = JsonHelper.JsonDeserialize<List<Card>>(jsonobjstr);
Session["ListPrintCard"] = cards;
gvCardList.DataSource = cards;
gvCardList.DataBind();
}
catch (Exception ex)
{
Page.ClientScript.RegisterStartupScript(this.GetType(), "key", "<script>alert('" + ex.Message.ToString() + "');</script>");
return;
}
}
public class PrintCard
{
public string CardCode { get; set; }
public string Password { get; set; }
}
/// <summary>
/// 生成二维码
/// </summary>
/// <param name="QrCodeStr">二维码字符串</param>
/// <returns></returns>
public string GetQrCode(string QrCodeStr)
{
string FileName = imageBasePath + Guid.NewGuid().ToString() + ".png";
try
{
QrEncoder qrEncoder = new QrEncoder(ErrorCorrectionLevel.L);
QrCode qrCode = new QrCode();
qrEncoder.TryEncode(QrCodeStr, out qrCode);
GraphicsRenderer renderer = new GraphicsRenderer(new FixedModuleSize(5, QuietZoneModules.Two), Brushes.Black, Brushes.White);
using (FileStream stream = new FileStream(FileName, FileMode.Create))
{
renderer.WriteToStream(qrCode.Matrix, ImageFormat.Png, stream);
}
}
catch (Exception ex)
{
FileName = "";
throw ex;
}
return FileName;
}
protected void btnGenerateCode_Click(object sender, EventArgs e)
{
//GenerateQrCodeNet();
AddPicture();
}
/// <summary>
/// 二维码导出到Excel
/// </summary>
protected void AddPicture()
{
try
{
if (!Directory.Exists(imageBasePath))
{
Directory.CreateDirectory(imageBasePath);
}
if (!Directory.Exists(excelBasePath))
{
Directory.CreateDirectory(excelBasePath);
}
//创建工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
//create sheet
HSSFSheet sheet = (HSSFSheet)workbook.CreateSheet("Sheet1");
string FileName = excelBasePath + DateTime.Now.ToString("yyyyMMddhh24mss") + ".xls";
#region 右击文件 属性信息
//{
// DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
// dsi.Company = "https://....../";
// workbook.DocumentSummaryInformation = dsi;
// SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
// if (HttpContext.Current.Session["realname"] != null)
// {
// si.Author = HttpContext.Current.Session["realname"].ToString();
// }
// else
// {
// if (HttpContext.Current.Session["username"] != null)
// {
// si.Author = HttpContext.Current.Session["username"].ToString();
// }
// } //填加xls文件作者信息
// si.ApplicationName = "NPOI"; //填加xls文件创建程序信息
// si.LastAuthor = "OA系统"; //填加xls文件最后保存者信息
// si.Comments = "OA系统自动创建文件"; //填加xls文件作者信息
// si.Title = "ddd"; //填加xls文件标题信息
// si.Subject = "ddd"; //填加文件主题信息
// si.CreateDateTime = DateTime.Now;
// workbook.SummaryInformation = si;
//}
#endregion
string strQrCodePath = "";
//填充列标题以及样式
int rowsNum = 0; //行号
HSSFRow headerRow = (HSSFRow)sheet.CreateRow(rowsNum);
HSSFCellStyle headStyle = (HSSFCellStyle)workbook.CreateCellStyle();
headStyle.Alignment = (HorizontalAlignment)HorizontalAlignment.CENTER;
headerRow.HeightInPoints = 30;
HSSFFont font = (HSSFFont)workbook.CreateFont();
font.FontHeightInPoints = 13;
font.Boldweight = 700;
headStyle.SetFont(font);
headerRow.CreateCell(0, CellType.STRING).SetCellValue("卡号");
headerRow.CreateCell(1, CellType.STRING).SetCellValue("密码");
headerRow.CreateCell(2, CellType.STRING).SetCellValue("卡二维码");
//合并列头单元格
//CellRangeAddress cellRangeAddress = new CellRangeAddress(0, 0, 2, 4);
//sheet.AddMergedRegion(cellRangeAddress);
//设置列的宽度
for (int columnindex = 0; columnindex < 3; columnindex++)
{
headerRow.GetCell(columnindex).CellStyle = headStyle;
sheet.SetColumnWidth(columnindex, 5000);
}
//填充数据行
HSSFRow row = null;
rowsNum = 1; //行号，从第2行开始
List<PrintCard> list = (List<PrintCard>)Session["ListPrintCard"];
foreach (PrintCard p in list)
{
//写入字段值
row = (HSSFRow)sheet.CreateRow(rowsNum);
HSSFCellStyle cellStyle = (HSSFCellStyle)workbook.CreateCellStyle();
cellStyle.Alignment = (HorizontalAlignment)HorizontalAlignment.CENTER;
row.HeightInPoints = 120;
HSSFFont cellfont = (HSSFFont)workbook.CreateFont();
cellfont.FontHeightInPoints = 10;
cellStyle.SetFont(cellfont);
row.CreateCell(0, CellType.STRING).SetCellValue(p.CardCode);
row.CreateCell(1, CellType.STRING).SetCellValue(p.Password);
row.CreateCell(2, CellType.BLANK).SetCellValue("");
//合并单元格
//CellRangeAddress rowCellRangeAddress = new CellRangeAddress(rowsNum, rowsNum, 2, 4);
//sheet.AddMergedRegion(rowCellRangeAddress);
strQrCodePath = GetQrCode(p.CardCode);
byte[] bytes = System.IO.File.ReadAllBytes(strQrCodePath);
int pictureIdx = workbook.AddPicture(bytes, PictureType.PNG);
// Create the drawing patriarch. This is the top level container for all shapes.
HSSFPatriarch patriarch = (HSSFPatriarch)sheet.CreateDrawingPatriarch();
//add a picture
HSSFClientAnchor anchor = new HSSFClientAnchor(0, 10, 1023, 0, 2, rowsNum, 2, rowsNum);
HSSFPicture pict = (HSSFPicture)patriarch.CreatePicture(anchor, pictureIdx);
pict.Resize();
//设置行的高度
for (int rowindex = 0; rowindex < 3; rowindex++)
{
row.GetCell(rowindex).CellStyle = cellStyle;
}
rowsNum++;
//删除图片文件
if (File.Exists(strQrCodePath))
{
File.Delete(strQrCodePath);
}
}
//供浏览器下载Excel
if (HttpContext.Current.Request.Browser.Browser == "IE")
FileName = HttpUtility.UrlEncode(FileName);
using (MemoryStream ms = new MemoryStream())
{
workbook.Write(ms);
ms.Flush();
ms.Position = 0;
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();
}
}
catch (Exception ex)
{
Page.ClientScript.RegisterStartupScript(this.GetType(), "key", "<script>alert('" + ex.Message.ToString() + "');</script>");
}
}
protected void gvCardList_RowCommand(object sender, GridViewCommandEventArgs e)
{
string cardCode = e.CommandArgument.ToString();
}
}
}
