C# 如何为.net核心MVC web应用程序创建和显示PDF文件?
我有一个asp应用程序,可以创建和显示PDF文件。我需要为.net核心应用程序复制相同的功能。我对.net核心MVC不是很有经验,所以我不知道如何才能做到这一点 DisplayPDF.aspx.csC# 如何为.net核心MVC web应用程序创建和显示PDF文件?,c#,asp.net,asp.net-core-mvc,C#,Asp.net,Asp.net Core Mvc,我有一个asp应用程序,可以创建和显示PDF文件。我需要为.net核心应用程序复制相同的功能。我对.net核心MVC不是很有经验,所以我不知道如何才能做到这一点 DisplayPDF.aspx.cs public partial class DisplayPDF : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { // get application id fr
public partial class DisplayPDF : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
// get application id from query string
string strFile = Request.QueryString["File"];
if (!string.IsNullOrEmpty(strFile))
{
string fileToOpen = string.Empty;
// get file path to requested application id's pdf file
string filePath = System.IO.Path.GetDirectoryName(Request.PhysicalApplicationPath) +
"\\Sessions\\" + Session.SessionID + "\\" + strFile;
fileToOpen = "sessions/" + Session.SessionID + "/" + strFile;
if (!System.IO.File.Exists(filePath))
{
LabelError.Visible = true;
LabelError.Text = "The pdf was not generated. Try the action again. If the problem persists contact website support.";
}
Response.Redirect(fileToOpen);
}
else
{
// need to have query string parameter
throw new ApplicationException("Query string parameter is missing");
}
}
}
DisplayPDF.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="DisplayPDF.aspx.cs" Inherits="Test.WS.App.DisplayPDF" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Display PDF</title>
<meta name="robots" content="noindex,nofollow" />
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="LabelError" runat="server" Visible="false"></asp:Label>
</div>
</form>
</body>
</html>
基于此Web表单代码,您可以在core mvc中显示pdf,如下所示: 请注意,我的pdf文件放在core的“wwwroot”文件夹下 项目 DisplayPDFController.cs:
public class DisplayPDFController : Controller
{
private IWebHostEnvironment _hostingEnvironment;
public DisplayPDFController(IWebHostEnvironment environment)
{
_hostingEnvironment = environment;
}
public IActionResult Index()
{
return View();
}
[HttpPost]
public string Index(string fileName)
{
string filePath = Path.Combine(_hostingEnvironment.WebRootPath, @"Files\" + fileName);
if (System.IO.File.Exists(filePath))
{
return filePath;
}
else
{
return "Report was not generated.";
}
}
public FileResult ShowPDF(string path)
{
var fileStream = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read);
return File(fileStream, "application/pdf");
}
}
Index.cshtml视图:
@{
布局=空;
}
指数
$(函数(){
$(“#显示”)。单击(函数(){
event.preventDefault();
$.ajax({
键入:“POST”,
数据:{fileName:$(“#Text1”).val()},
url:“/DisplayPDF/Index”,
成功:功能(响应){
如果(响应=='未生成报告'){
警报(响应);
}否则{
window.open(“/DisplayPDF/ShowPDF?path=“+response,”_blank”);
}
},
});
})
})
基于此Web表单代码,您可以在core mvc中显示pdf,如下所示:
请注意,我的pdf文件放在core的“wwwroot”文件夹下
项目
DisplayPDFController.cs:
public class DisplayPDFController : Controller
{
private IWebHostEnvironment _hostingEnvironment;
public DisplayPDFController(IWebHostEnvironment environment)
{
_hostingEnvironment = environment;
}
public IActionResult Index()
{
return View();
}
[HttpPost]
public string Index(string fileName)
{
string filePath = Path.Combine(_hostingEnvironment.WebRootPath, @"Files\" + fileName);
if (System.IO.File.Exists(filePath))
{
return filePath;
}
else
{
return "Report was not generated.";
}
}
public FileResult ShowPDF(string path)
{
var fileStream = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read);
return File(fileStream, "application/pdf");
}
}
Index.cshtml视图:
@{
布局=空;
}
指数
$(函数(){
$(“#显示”)。单击(函数(){
event.preventDefault();
$.ajax({
键入:“POST”,
数据:{fileName:$(“#Text1”).val()},
url:“/DisplayPDF/Index”,
成功:功能(响应){
如果(响应=='未生成报告'){
警报(响应);
}否则{
window.open(“/DisplayPDF/ShowPDF?path=“+response,”_blank”);
}
},
});
})
})