如何在浏览器中将数据从数据库显示为pdf [英] How to display data from database as pdf in browser
问题描述
实际上我的代码正在用于在文件中打开pdf格式，但我想在浏览器中以pdf格式从数据库中检索数据
下面是代码任何一个helpme或给我的例子
使用System;
使用System.Collections.Generic;
使用System.Linq;
使用System.Web;
使用System.Web.UI;
使用System.Web.UI.WebControls;
使用System.Web.UI.WebControls.WebParts;
使用System.Web.UI.HtmlControls;
使用System.Data.SqlClient;
使用System.IO;
使用iTextSharp.text;
使用iTextSharp.text.pdf;
使用iTextSharp.text.html;
使用iTextSharp.text.html .simpleparser;
使用System.Text;
使用System.Data;
使用System.Data.SqlClient;
public partial class _Default：System.Web.UI.Page
{
protected void Page_Load（object sender，EventArgs e）
{
s tring cs =Data Source = HOME; Initial Catalog = Registration; Integrated Security = True;
SqlConnection con = new SqlConnection（cs）;
SqlCommand cmd = new SqlCommand （select * from employeep，con）;
DataTable dt = GetData（cmd）;
GridView1.DataSource = dt;
GridView1 .DataBind（）;
}
私有DataTable GetData（SqlCommand cmd）
{
DataTable dt = new DataTable（）;
String strConnString =Data Source = HOME; Initial Catalog = Registration; Integrated Security = True;
SqlConnection con = new SqlConnection（strConnString）;
SqlDataAdapter sda = new SqlDataAdapter（）;
cmd.CommandType = CommandType.Text;
cmd.Connection = con;
尝试
{
con.Open（）;
sda.SelectCommand = cmd;
sda.Fill（dt）;
返回dt;
}
catch（Exception ex）
{
抛出前;
}
终于
{
con.Close（）;
sda.Dispose（）;
con。 Dispose（）;
}
}
public override void VerifyRenderingInServerForm （控制控制）
{
/ *验证控件是否呈现* /
}
protected void OnPaging（对象发送者，GridViewPageEventArgs e）
{
GridView1.PageIndex = e.NewPageIndex;
GridView1.DataBind（）;
}
void btnExportPDF_Click（object sender，EventArgs e）
{
Response.ContentType =application / pdf;
Response.AddHeader（content-disposition，attachment; filename = GridViewExport.pdf）;
响应。 Cache.SetCacheability（HttpCacheability.NoCache）;
StringWriter sw = new StringWriter（）;
HtmlTextWriter hw = new HtmlTextWriter（sw）;
GridView1.AllowPaging = false;
GridView1.DataBind（）;
GridView1.RenderControl（hw）;
StringReader sr = new StringReader（sw.ToString（））;
文件pdfDoc = new Document（ PageSize.A4,10f，10f，10f，0f）;
HTMLWorker htmlparser = new HTMLWorker（pdfDoc）;
PdfWriter.GetInstance（pdfDoc，Response.OutputStream）;
pdfDoc.Open（）;
htmlparser.Parse（sr）;
pdfDoc.Close（）;
Response.Write（pdfDoc）;
Response.Cache.SetCacheability（HttpCacheability.NoCache）;
Response.End（）;
}
actually my code is working for opening pdf format in file but i want retrieved data from databse in pdf format in browser
below is the code any one helpme or give me examples
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.text.html;
using iTextSharp.text.html.simpleparser;
using System.Text;
using System.Data;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string cs = "Data Source=HOME;Initial Catalog=Registration;Integrated Security=True";
SqlConnection con = new SqlConnection(cs);
SqlCommand cmd = new SqlCommand("select * from employeep",con);
DataTable dt = GetData(cmd);
GridView1.DataSource = dt;
GridView1.DataBind();
}
private DataTable GetData(SqlCommand cmd)
{
DataTable dt = new DataTable();
String strConnString = "Data Source=HOME;Initial Catalog=Registration;Integrated Security=True";
SqlConnection con = new SqlConnection(strConnString);
SqlDataAdapter sda = new SqlDataAdapter();
cmd.CommandType = CommandType.Text;
cmd.Connection = con;
try
{
con.Open();
sda.SelectCommand = cmd;
sda.Fill(dt);
return dt;
}
catch (Exception ex)
{
throw ex;
}
finally
{
con.Close();
sda.Dispose();
con.Dispose();
}
}
public override void VerifyRenderingInServerForm(Control control)
{
/* Verifies that the control is rendered */
}
protected void OnPaging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
GridView1.DataBind();
}
void btnExportPDF_Click(object sender, EventArgs e)
{
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.pdf");
Response.Cache.SetCacheability(HttpCacheability.NoCache);
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
GridView1.AllowPaging = false;
GridView1.DataBind();
GridView1.RenderControl(hw);
StringReader sr = new StringReader(sw.ToString());
Document pdfDoc = new Document(PageSize.A4, 10f,10f,10f,0f);
HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
pdfDoc.Open();
htmlparser.Parse(sr);
pdfDoc.Close();
Response.Write(pdfDoc);
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.End();
}
推荐答案
您已完成绝大部分工作。下一步是在btnExportPDF_Click方法中遍历DataTable中的数据，并将元素添加到PDF文档中。这为您要做的事情提供了一个很好的例子：
http://stackoverflow.com/questions/24361141/how-to-export-grid-view-data-to-pdf-using-itext -sharp [ ^ ]
或者这个：
< a href =http://www.c-sharpcorner.com/UploadFile/raj1979/export-grid-view-data-to-pdf-using-itextsharp/> http://www.c-sharpcorner.com/ UploadFile / raj1979 / export-grid-view-data-to-pdf-using-itextsharp / [ ^ ]
You have already completed the vast majority of your work. The next step is to loop through the data in your DataTable in the btnExportPDF_Click method and add elements to your PDF document. This provides a good example of what you are trying to do:
http://stackoverflow.com/questions/24361141/how-to-export-grid-view-data-to-pdf-using-itext-sharp[^]
or this:
http://www.c-sharpcorner.com/UploadFile/raj1979/export-grid-view-data-to-pdf-using-itextsharp/[^]
这篇关于如何在浏览器中将数据从数据库显示为pdf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！
