将数据从我的数据库放入我的 PDF (C#)

Question

我在 C# 中创建了一个 from，它将在学生登录时生成一个 PDF。我完成了模板，我的问题是如何将数据库上的数据放入我的 PDF。

PDF 中需要显示的数据是学生的姓名、学生的课程、学分以及他/她注册的所有科目。

所有数据都存储在学生和注册表中。 这是表格：

mysql> describe enroll;
+-----------------+---------+------+-----+---------+----------------+
| Field           | Type    | Null | Key | Default | Extra          |
+-----------------+---------+------+-----+---------+----------------+
| Eid             | int(11) | NO   | PRI | NULL    | auto_increment |
| Students_studid | int(11) | NO   | MUL | NULL    |                |
| Subjects_Subjid | int(11) | NO   | MUL | NULL    |                |
+-----------------+---------+------+-----+---------+----------------+

和

mysql> describe students;
+------------+-------------+------+-----+---------+----------------+
| Field      | Type        | Null | Key | Default | Extra          |
+------------+-------------+------+-----+---------+----------------+
| studid     | int(11)     | NO   | PRI | NULL    | auto_increment |
| StudName   | varchar(45) | YES  |     | NULL    |                |
| StudCourse | varchar(45) | YES  |     | NULL    |                |
| StudYr     | int(11)     | YES  |     | NULL    |                |
| StudGender | varchar(45) | YES  |     | NULL    |                |
+------------+-------------+------+-----+---------+----------------+

这是我生成的 PDF 表单：

    class Form_PDF : Form {

        public Form_PDF(){
        Text = "PDF";

        CenterToScreen();

        System.IO.FileStream fs = new FileStream(""+Form_Login.getUser+".pdf", FileMode.Create);

           Document document = new Document(PageSize.A4, 25, 25, 30, 30);

           PdfWriter writer = PdfWriter.GetInstance(document, fs);


           document.AddAuthor("The Author");

           document.AddCreator("using iTextSharp");

           document.AddKeywords("C# PDF");

           document.AddSubject("C# PDF");

           document.AddTitle("PDF creation using iTextSharp");


           document.Open();




           PdfContentByte cb = writer.DirectContent;
           PdfContentByte xy = writer.DirectContent;

           //BaseFont f_cb = BaseFont.CreateFont("c:\\windows\\fonts\\calibri.ttf", BaseFont.CP1252, BaseFont.EMBEDDED);
            BaseFont f_cn = BaseFont.CreateFont("c:\\windows\\fonts\\calibri.ttf", BaseFont.CP1252, BaseFont.EMBEDDED);


           //XY
           xy.BeginText();
           xy.SetFontAndSize(f_cn, 9);

           xy.SetTextMatrix(110, 661); // Left, Top
           xy.ShowText("Student Name: " +Form_Login.getUser);

           xy.SetTextMatrix(110, 637); // Left, Top
           xy.ShowText("Semester: ");



           xy.SetTextMatrix(230, 661); // Left, Top
           xy.ShowText("Course: "); 
            sqlConnection1.Close();

           xy.SetTextMatrix(230, 637); // Left, Top
           xy.ShowText("Section: ");

           xy.SetTextMatrix(230, 613); // Left, Top
           xy.ShowText("Division: ");

           xy.SetTextMatrix(375, 661); // Left, Top
           xy.ShowText("School Year: ");

           xy.SetTextMatrix(375, 637); // Left, Top
           xy.ShowText("Credit Units: ");

           cb.SetLineWidth(0f);
           cb.MoveTo(100, 601);
           cb.LineTo(510, 601);
           cb.Stroke();

           xy.SetTextMatrix(120, 577); // Left, Top
           xy.ShowText("Subject Code");

           xy.SetTextMatrix(195, 577); // Left, Top
           xy.ShowText("Subject Description");

           xy.SetTextMatrix(310, 577); // Left, Top
           xy.ShowText("Subject Schedule");

           xy.SetTextMatrix(405, 577); // Left, Top
           xy.ShowText("Room #");

           xy.SetTextMatrix(470, 577); // Left, Top
           xy.ShowText("Units");

           cb.SetLineWidth(0f);
           cb.MoveTo(100, 560);
           cb.LineTo(510, 560);
           cb.Stroke();

           xy.SetTextMatrix(120, 313); // Left, Top
           xy.ShowText("NOTE: Assessment on this Registration Card is TEMPORARY only. Final assessment will be determined by");

           xy.SetTextMatrix(145, 301); // Left, Top
           xy.ShowText("the Finance office.");

           cb.SetLineWidth(0f);
           cb.MoveTo(400, 253);
           cb.LineTo(510, 253);
           cb.Stroke();

           xy.SetTextMatrix(425, 241); // Left, Top
           xy.ShowText("Registrar Officer");

           int row = 1;
            for (int y = 0; y != 70; y++)
            {
               xy.SetTextMatrix(10, row);
               xy.ShowText("Y: " + row.ToString());
               row += 12; // The spacing between the rows is set to 12 "points"
            }
            int col = 35;
            for (int x = 0; x != 22; x++)
            {
               xy.SetTextMatrix(col, 829);
               xy.ShowText("X: " + col.ToString());
               col += 25; // The spacing between the columns is set to 25 "points"
            }
            xy.EndText();


            cb.BeginText();
            cb.SetFontAndSize(f_cn, 16);


            //START DIRI
            iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance("C:\\Users\\db\\Desktop\\addu-logo.jpg");
            img.SetAbsolutePosition(185, 697);
            img.ScalePercent(10f);
            cb.AddImage(img);


            cb.SetTextMatrix(240, 733); // Left, Top
            cb.ShowText("Ateneo de Davao University");

            cb.SetTextMatrix(280, 718);
            cb.ShowText("Registrar's Office");

            cb.SetTextMatrix(266, 703);
            cb.ShowText("Student Registration");


            cb.EndText();



           //document.Add(new Paragraph("Ateneo de Davao University"));
           document.Close();
           writer.Close();
           fs.Close();



    }
}

Answer 1

这只是一个例子：

using System;
using MySql.Data.MySqlClient; 

public class Example
{

    static void Main() 
    {
        string cs = @"server=localhost;userid=user12;
            password=34klq*;database=mydb";

        MySqlConnection conn = null;
        MySqlDataReader rdr = null;

        try 
        {
            conn = new MySqlConnection(cs);
            conn.Open();

            string stm = "SELECT * FROM Authors";
            MySqlCommand cmd = new MySqlCommand(stm, conn);
            rdr = cmd.ExecuteReader();

            while (rdr.Read()) 
            {
                Console.WriteLine(rdr.GetInt32(0) + ": " 
                    + rdr.GetString(1));
            }

        } catch (MySqlException ex) 
        {
            Console.WriteLine("Error: {0}",  ex.ToString());

        } finally 
        {
            if (rdr != null) 
            {
                rdr.Close();
            }

            if (conn != null) 
            {
                conn.Close();
            }

        }
    }
}

如需了解完整信息，请访问

http://zetcode.com/db/mysqlcsharptutorial/

mysql的数据会进来这个

while (rdr.Read()) 
            {
                Console.WriteLine(rdr.GetInt32(0) + ": " 
                    + rdr.GetString(1));
            }

这里的循环会让你一一记录，

修改代码

Console.WriteLine(rdr.GetInt32(0) + ": " + rdr.GetString(1));

如你所愿