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  • odbc连接数据库

    using System;
    using System.Collections.Generic;
    using System.Text;
    using Console = System.Console;
    using Microsoft.Data.Odbc;
     
    using System.Data;
    using System.Data.SqlClient;
     
     
    namespace ConsoleApplication1
    {
        class Program
        {
            static void Main(string[] args)
            {
     
                try
                {
                    connSqlserver();
                }
                catch (OdbcException MyOdbcException)
                {
                    for (int i = 0; i < MyOdbcException.Errors.Count; i++)
                    {
                        Console.Write("ERROR #" + i + " " +
                        "Message: " + MyOdbcException.Errors[i].Message + " " +
                        "Native: " + MyOdbcException.Errors[i].NativeError.ToString() + " " +
                        "Source: " + MyOdbcException.Errors[i].Source + " " +
                        "SQL: " + MyOdbcException.Errors[i].SQLState + " ");
                    }
                }
     
                
                Console.ReadLine();
     
            }
     
            public void ceshi()
            {
                try
                {
                    string MyConString = "DRIVER={MySQL ODBC 3.51 Driver};" +
                    "SERVER=localhost;" +
                    "DATABASE=jy;" +
                    "UID=root;" +
                    "PASSWORD=123;" +
                    "OPTION=3;CharSet=gb2312;";
     
                    OdbcConnection MyConnection = new OdbcConnection(MyConString);
                    MyConnection.Open();
     
                    Console.WriteLine(" !!! success, connected successfully !!! ");
     
     
                    //Create a sample table
                    OdbcCommand MyCommand = new OdbcCommand("DROP TABLE IF EXISTS my_odbc_net", MyConnection);
                    MyCommand.ExecuteNonQuery();
                    MyCommand.CommandText = "CREATE TABLE my_odbc_net(id int, name varchar(20), idb bigint)";
                    MyCommand.ExecuteNonQuery();
     
                    //Insert
                    MyCommand.CommandText = "INSERT INTO my_odbc_net VALUES(10,'" + filter("中国,''") + "', 300)";
                    Console.WriteLine("INSERT, Total rows affected:" + MyCommand.ExecuteNonQuery()); ;
     
                    //Insert
                    MyCommand.CommandText = "INSERT INTO my_odbc_net VALUES(20,'mysql',400)";
                    Console.WriteLine("INSERT, Total rows affected:" + MyCommand.ExecuteNonQuery());
     
                    //Insert
                    MyCommand.CommandText = "INSERT INTO my_odbc_net VALUES(20,'mysql',500)";
                    Console.WriteLine("INSERT, Total rows affected:" + MyCommand.ExecuteNonQuery());
     
                    //Update
                    MyCommand.CommandText = "UPDATE my_odbc_net SET id=999 WHERE id=20";
                    Console.WriteLine("Update, Total rows affected:" + MyCommand.ExecuteNonQuery());
     
                    //COUNT(*) 
                    MyCommand.CommandText = "SELECT COUNT(*) as TRows FROM my_odbc_net";
                    Console.WriteLine("Total Rows:" + MyCommand.ExecuteScalar());
     
                    //Fetch
                    MyCommand.CommandText = "SELECT * FROM my_odbc_net";
                    OdbcDataReader MyDataReader;
                    MyDataReader = MyCommand.ExecuteReader();
                    while (MyDataReader.Read())
                    {
                        if (string.Compare(MyConnection.Driver, "myodbc3.dll") == 0)
                        {
                            Console.WriteLine("Data:" + MyDataReader.GetInt32(0) + " " +
                            MyDataReader.GetString(1) + " " +
                            MyDataReader.GetInt64(2)); //Supported only by Connector/ODBC 3.51
                        }
                        else
                        {
                            Console.WriteLine("Data:" + MyDataReader.GetInt32(0) + " " +
                            MyDataReader.GetString(1) + " " +
                            MyDataReader.GetInt32(2)); //BIGINTs not supported by Connector/ODBC
                        }
                    }
     
                    //Close all resources
                    MyDataReader.Close();
                    MyConnection.Close();
                }
                catch (OdbcException MyOdbcException)//Catch any ODBC exception ..
                {
                    for (int i = 0; i < MyOdbcException.Errors.Count; i++)
                    {
                        Console.Write("ERROR #" + i + " " +
                        "Message: " + MyOdbcException.Errors[i].Message + " " +
                        "Native: " + MyOdbcException.Errors[i].NativeError.ToString() + " " +
                        "Source: " + MyOdbcException.Errors[i].Source + " " +
                        "SQL: " + MyOdbcException.Errors[i].SQLState + " ");
                    }
                }
            }
     
     
            public static void connSqlserver()
            {
                string MyConString = "DRIVER={MySQL ODBC 3.51 Driver};" +
                    "SERVER=localhost;" +
                    "DATABASE=zs;" +
                    "UID=root;" +
                    "PASSWORD=123;" +
                    "OPTION=3;CharSet=gb2312;";
     
                OdbcConnection MyConnection = new OdbcConnection(MyConString);
                MyConnection.Open();
                OdbcCommand MyCommand = new OdbcCommand("DROP TABLE IF EXISTS my_odbc_net", MyConnection);
                MyCommand.ExecuteNonQuery();
     
     
                //使用轻量级的SqlDataReader显示数据
                //指定Sql Server提供者的连接字符串
                string connString = "Data Source=PC-200908231053\SQLEXPRESS;database=occupationNew;User id=sa;PWD=123";
     
                //建立连接对象
     
                SqlConnection Sqlconn = new SqlConnection(connString);
                //打开连接
                Sqlconn.Open();
     
                
                string thisCommand = "select * from Article where ID >"+ 1243931905062 +"order by ID";
     
                //创建SqlDataAdapter对象,有两个参数,一个是查询字符串,一个是连接对象
                SqlDataAdapter SqlDap = new SqlDataAdapter(thisCommand, Sqlconn);
     
                //创建DataSet对象
     
                DataSet thisDataset = new DataSet();
     
                //使用SqlDataAdapter的Fill方法填充DataSet,有两个参数,一个是创建的DataSet实例,一个是填入的表
     
                SqlDap.Fill(thisDataset, "informations");
     
                //显示查询结果
     
                foreach (DataRow theRow in thisDataset.Tables["informations"].Rows)
                {
                    //Console.WriteLine(theRow["InformationId"] + " " + theRow["companyName"]);
                    //MyCommand.CommandText = "INSERT INTO information(companyname,course,major,number,sex,pay,request,informationsource,datetime,job,workprovinci,detailplace,isbin,enddate,existcourse,academymajororder) "
                    //    + "VALUES('" + filter(theRow["CompanyName"]) + "','" + filter(theRow["Course"]) + "','" + filter(theRow["Major"]) + "','" + filter(theRow["Number"]) + "','" + filter(theRow["Sex"]) + "','" + filter(theRow["Pay"]) + "','" + filter(theRow["request"]) + "','" + filter(theRow["informationSource"]) + "','" + filter(theRow["DateTime"]) + "','" + filter(theRow["Job"]) + "','" + filter(theRow["WorkProvince"]) + "','" + filter(theRow["DetailPlace"]) + "','" + filter(theRow["IsBin"]) + "','" + filter(theRow["EndDate"]) + "','" + filter(theRow["ExistCourse"]) + "','" + filter(theRow["AcademyMajorOrder"]) + "')";
     
     
                    Console.WriteLine(theRow["ID"] + " " + theRow["Title"]);
                    MyCommand.CommandText = "INSERT INTO downloads(title,fenlei,content,lint,updatetime,click) "
                        + "VALUES('" + filter(theRow["Title"]) + "','" + filter(theRow["CategoryID"]) + "','" + filter(theRow["Content"]) + "','" + filter(theRow["Author"]) + "','" + filter(theRow["DateTime"]) + "','" + filter(theRow["Hits"]) + "')";
     
                    //Console.WriteLine(theRow["ID"] + " " + theRow["Title"]);
                    //MyCommand.CommandText = "INSERT INTO xinwens(title,fenlei,content,username,updatetime,click) "
                    //    + "VALUES('" + filter(theRow["Title"]) + "','" + "" + "','" + filter(theRow["Content"]) + "','" + filter("大学生就业指导中心") + "','" + filter(theRow["DateTime"]) + "','" + 0 + "')";
                    
     
     
     
                    Console.WriteLine("INSERT, Total rows affected:" + MyCommand.ExecuteNonQuery());
                }
                Sqlconn.Close();
     
                Console.ReadLine();
     
     
            }
     
            public static string filter(object text)
            {
                System.Text.Encoding GB2312 = System.Text.Encoding.GetEncoding("GB2312");
                System.Text.Encoding UTF8 = System.Text.Encoding.UTF8;
                byte[] data = GB2312.GetBytes(text.ToString());
                string msg = GB2312.GetString(data);
                return msg.Replace(",", ",").Replace("'", "’").Replace("―", "-");
     
            }
        }
    }
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  • 原文地址:https://www.cnblogs.com/zhangruisoldier/p/4935091.html
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