链接到pdf文件(asp.net) [英] link to pdf file(asp.net)

问题描述

我已使用文件上载将pdf文件保存到数据库中.现在我想从数据库中检索pdf文件，它必须链接到动态创建的链接按钮.因此，对于每个链接按钮，我都有一个链接到它的pdf文件.-如何使用C#

i have saved the pdf file to the database using file upload . now i want to retrive the pdf file from the database and it has to be linked to the linkbuttons that are dynamically created . so for each link button i have a pdf file linked to it. - how to do this in asp.net using C#

推荐答案

首先，您必须从数据库中读取记录.

First you'd have to read the records from the database.

假设您具有以下表结构:

Let's say you have the following table structure:

Id，名称，BinaryPdfData

Id, Name, BinaryPdfData

您使用ADO.NET，Linq2SQL或任何用于选择" ID和名称的东西放入IEnumerable(例如List或DataSet).

You use ADO.NET, Linq2SQL or whatever you're using to "SELECT" Id and Name into an IEnumerable (for example a List or DataSet).

然后将其绑定到ASP Repeater，其中ItemTemplate包含一个LinkBut​​ton，而Click事件背后的代码将然后将您重定向到某个下载页面，例如"downloadpdf.aspx?id = {0}"

Then you bind that to an ASP Repeater where the ItemTemplate contains a LinkButton and the code behind for the Click event would then redirect you to some download page for example "downloadpdf.aspx?id={0}"

{0}是记录的ID.

Where {0} is the Id of the record.

download.aspx页从数据库中读取指定的记录并将二进制pdf数据放入缓冲区数组.

The download.aspx page reads the specified record from the database and puts the binary pdf data in a buffer array.

接下来，您必须设置内容类型等...

Next you'll have to set the content type etc...

我没有时间建立一个很好的例子，但是您可能需要这个:

I don't have time to build a good example, but you'll probably need this:

Response.Clear()

//set the content type to PDF
Response.ContentType = "application/pdf"

//add content type header 
Response.AddHeader("Content-Type", "application/pdf")

//set the content disposition
Response.AddHeader("Content-Disposition", "inline;filename=helloworld.pdf")

//write the buffer with pdf file to the output
Response.BinaryWrite(Buffer)

Response.End()

这篇关于链接到pdf文件(asp.net)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！