C#写csv文件
1、在项目中经常需要把报表下载为csv格式的文件,如何在C#中写csv文件,以下为一个简化的例子,不使用任何控件,旨在说明用法。
前端view
下载结果
2、创建一个MVC项目(Intranet Application),项目结构如下
3、各部分代码:
3.1、定义实体
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web; namespace MvcDownLoadCsv.Models
{
public class Person
{
public string Name { get; set; }
public string Code { get; set; }
public string Department { get; set; }
}
}
3.2、定义共用方法,将object数据转换为HtmlString,
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web; namespace MvcDownLoadCsv.Extensions
{
public static class DataTypeExtensions
{
public static HtmlString ToHtmlCsv(this object o)
{
if (o == null) return new HtmlString(""); var s = o.ToString(); if (s.Length == ) return new HtmlString(s); s = s.Replace("\"", "\"\"");
HtmlString hs = new HtmlString(s.ToString()); return new HtmlString(string.Concat("\"", s, "\"")); } }
}
3.3、定义公用方法,把Model数据转换为csv格式文件
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Text;
using System.IO;
using System.Text.RegularExpressions; namespace MvcDownLoadCsv
{
public class CsvDownloadResult : ActionResult
{ public CsvDownloadResult(string name, object model)
{ this.name = name;
this.model = model; } private string name;
private object model; public override void ExecuteResult(ControllerContext context)
{ context.HttpContext.Response.Clear();
context.HttpContext.Response.AddHeader("content-disposition", string.Format("attachment; filename=My.{0}.csv", name));
context.HttpContext.Response.ContentEncoding = Encoding.GetEncoding();// Use ANSI encoding
context.HttpContext.Response.ContentType = "application/vnd.ms-excel"; var csv = ""; using (StringWriter sw = new StringWriter())
{ var viewResult = ViewEngines.Engines.FindPartialView(context, name + "Csv");
var viewContext = new ViewContext(context, viewResult.View, new ViewDataDictionary(model), new TempDataDictionary(), sw);
viewResult.View.Render(viewContext, sw); csv = sw.GetStringBuilder().ToString(); csv = Regex.Replace(csv, "\r\n[ ]+\r\n[ ]+", "\r\n");
csv = Regex.Replace(csv, ",\r\n[ ]*", ","); } context.HttpContext.Response.Write(csv); context.HttpContext.Response.End(); } }
}
此例子中context最后为:
\Person Report\"\r\n\r\n\"Name\",\"Person Code\",\"Person Department\",\r\n\"a\" ,\"1\" ,\"Developer\" ,\r\n\"b\" ,\"2\" ,\"Test\" ,\r\n\"c\" ,\"3\" ,\"HR\" ,\r\n"
\r是回车,英文是Carriage return,表示使光标下移一格
\n是换行,英文是New line,表示使光标到行首
\r\n表示回车换行
3.4、定义csv文件格式
@using MvcDownLoadCsv.Extensions
@model List<MvcDownLoadCsv.Models.Person>
"Person Report"
@if (Model.Count == )
{<text>"No Person find."</text>
}
else
{<text>
"Name",
"Person Code",
"Person Department",
</text> foreach (var item in Model)
{ @item.Name.ToHtmlCsv() <text>,</text>
@item.Code.ToHtmlCsv() <text>,</text>
@item.Department.ToHtmlCsv() <text>,</text>
<text></text>
}
}
3.5、后台方法,构造数据,定义响应前端下载的方法
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MvcDownLoadCsv.Models; namespace MvcDownLoadCsv.Controllers
{
public class HomeController : Controller
{
public ActionResult Index()
{
ViewBag.Message = "Welcome to ASP.NET MVC!"; return View(GetPerson());
} public ActionResult About()
{
return View();
} public List<Person> GetPerson()
{
List<Person> lst = new List<Person>()
{
new Person() { Name = "a", Code = "", Department = "Developer" },
new Person() { Name = "b", Code = "", Department = "Test" },
new Person() { Name = "c", Code = "", Department = "HR" }
};
return lst;
} [HttpPost]
public ActionResult DownloadCsv()
{
//Person为定义报表格式的cshtml文件名称, GetPerson()返回的是报表数据
return new CsvDownloadResult("Person", GetPerson());
} } }
3.6、前端页面view
@model List<MvcDownLoadCsv.Models.Person>
@{
ViewBag.Title = "Home Page";
}
<script type="text/javascript"> $(document).ready(function () {
$("#downloadData").click(function (e) {
e.preventDefault();
$("#downloadCriteria")[].submit();
}); $("#copyData").toggle(!!(document.body.createControlRange)).click(function (e) {
e.preventDefault();
try {
var range = document.body.createControlRange();
range.add($("#pis")[]);
range.execCommand("Copy");
alert("Report data was copied to the clipboard.");
}
catch (e) { alert("Failed to copy the report data to the clipboard:\n\n" + e.message); }
});
});
</script> <h2>@ViewBag.Message</h2>
<p>
To learn more about ASP.NET MVC visit <a href="http://asp.net/mvc" title="ASP.NET MVC Website">http://asp.net/mvc</a>.
</p> <div style="height:30px" class="actions">
@if (Model.Count > )
{
<a href="javascript:void(0);" id="downloadData" class="action" title="Download Data to Excel">download</a>
<a href="" id="copyData" class="action" title="Copy Results to Clipboard">copy</a>
<a href="" id="downloadDataForPopup" class="action" title="Download Data to Excel" style="display:none">downloadForPopup</a>
}
</div> <div class="fieldset">
<form action="@Url.Action("DownloadCsv", "Home")" method="post" id="downloadCriteria"> </form>
<table id="projects" class="data">
<tr>
<th>Name</th>
<th>Code</th>
<th>Department</th>
</tr>
@{ foreach (var item in Model)
{
<tr>
<td>@item.Name</td>
<td>@item.Code</td>
<td>@item.Department</td>
</tr>
}
}
</table>
</div>
。
C#写csv文件的更多相关文章
- PLSQL_PLSQL读和写CSV文件方式(案例)
2012-01-06 Created By BaoXinjin
- JavaCSV之写CSV文件
与JavaCSV读CSV文件相对应,JavaCSV也可以用来写数据到CSV文件中. 1.准备工作 (1)第三方包库下载地址:https://sourceforge.net/projects/javac ...
- 【python】写csv文件时遇到的错误
1.错误 在许多文件中,写入csv文件时都加"wb",w指写入,b指二进制 如: csvwrite=csv.writer(open("output.csv",& ...
- spark 写csv文件出现乱码 以及写文件读文件总结
参考链接:https://blog.csdn.net/qq_56870570/article/details/118492373 result_with_newipad.write.mode(&quo ...
- python 写csv文件
一.只有一列内容: def create_file(self, a, b): # 上传csv 文件 # os.remove('openfile.csv') open_file = open('5000 ...
- python笔记5-python2写csv文件中文乱码问题
前言 python2最大的坑在于中文编码问题,遇到中文报错首先加u,再各种encode.decode. 当list.tuple.dict里面有中文时,打印出来的是Unicode编码,这个是无解的. 对 ...
- .NET 创建并写CSV文件
/// <summary> /// 创建并写日志 /// </summary> /// <param name="SuccessA100">&l ...
- python3 写CSV文件多一个空行的解决办法
Python文档中有提到: open('eggs.csv', newline='') 也就是说,打开文件的时候多指定一个参数.Python文档中也有这样的示例: import csvwith open ...
- python写csv文件
name=['lucy','jacky','eric','man','san'] place=['chongqing','guangzhou','beijing','shanghai','shenzh ...
随机推荐
- 阿里云服务器上使用apt-get install出现404 Not Found
阿里云服务器上使用apt-get install出现404 Not Found 刚申请了的阿里云服务器,在其Ubuntu上用apt-get install安装软件时,会遇到 Failed to fet ...
- java的io操作(将字符串写入到txt文件中)
import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java ...
- jquery 为表单动态添加元素
$('<input />').attr('type','hidden') .attr('name','type') .attr('value', ...
- 网络防嗅探工具SniffJoke
网络防嗅探工具SniffJoke 在渗透测试中,通过网络嗅探,可以获取网络通信主机的各种信息.为了防止嗅探,Kali Linux提供了专用工具SniffJoke.该工具能够自动对用户的网络数据进行 ...
- [JSOI2009] 有趣的游戏
1444: [Jsoi2009]有趣的游戏 Time Limit: 10 Sec Memory Limit: 64 MBSubmit: 1800 Solved: 645[Submit][Statu ...
- hdu 1506 Largest Rectangle in a Histogram 构造
题目链接:HDU - 1506 A histogram is a polygon composed of a sequence of rectangles aligned at a common ba ...
- iOS import framework头文件时报错could not build module xxx
导致这个错误的原因有多种: 1.库的search paths没有设置对. 2.库里面某些头文件找不到. 而导致.h头文件找不到的原因也有多种: (a)search paths没设置对,文件可能换过位置 ...
- 跟着Sedgewick学算法(week 1 UnionFind)
发现笔记转过来,没有图的~~~~~~~~~~~悲剧,给出共享笔记链接 https://www.evernote.com/pub/yanbinliu/algorithm 很久之前就在coursera看到 ...
- [置顶]
docker--基础镜像和dockerfile
制作基础镜像 注意:需要在CentOS6下操作 准备工作 yum -y install febootstrap 下载ISO镜像文件到服务器 mkdir /mnt/centos6/ mount -o l ...
- 今天终于看了一下tanh函数的形式,双曲正切函数
tanh = sinh / cosh sinh = Hyperbolic sin cosh = Hyperbolic cos