关于csharp的实例教程

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Microsoft.SqlServer.Management.Common;//需添加microsoft.sqlserver.connectioninfo.dll的引用
using Microsoft.SqlServer.Management;//
using Microsoft.SqlServer.Management.Smo;//在microsoft.sqlserver.smo.dll中
using Microsoft.SqlServer.Management.Smo.RegisteredServers;//Microsoft.SqlServer.SmoExtended
using Microsoft.SqlServer.Management.Smo.Broker;
using Microsoft.SqlServer.Management.Smo.Agent;
using Microsoft.SqlServer.Management.Smo.SqlEnum;
using Microsoft.SqlServer.Management.Smo.Mail;
using Microsoft.SqlServer.Management.Smo.Internal;
using System.IO;
using System.Data.SqlClient;
using System.Text;
using System.Text.RegularExpressions;

////引用位置： C:\Program Files\Microsoft SQL Server\100\SDK\Assemblies\


       /// <summary>
        /// 涂聚文 2017-06-02
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {
            //Connect to the local, default instance of SQL Server.   
            Microsoft.SqlServer.Management.Common.ServerConnection conn = new ServerConnection(@"GEOVI-BD87B6B9C\GEOVINDU", "geovindu", "888888");
            Server srv = new Server(conn);
            //Reference the AdventureWorks2012 database.   
            Database db = srv.Databases["du"];

            //Define a UserDefinedFunction object variable by supplying the parent database and the name arguments in the constructor.   
            UserDefinedFunction udf = new UserDefinedFunction(db, "IsOWeek");

            //Set the TextMode property to false and then set the other properties.   
            udf.TextMode = false;
            udf.DataType = DataType.Int;
            udf.ExecutionContext = ExecutionContext.Caller;
            udf.FunctionType = UserDefinedFunctionType.Scalar;
            udf.ImplementationType = ImplementationType.TransactSql;

            //Add a parameter.   

            UserDefinedFunctionParameter par = new UserDefinedFunctionParameter(udf, "@DATE", DataType.DateTime);
            udf.Parameters.Add(par);

            //Set the TextBody property to define the user-defined function.   
            udf.TextBody = "BEGIN DECLARE @ISOweek int SET @ISOweek= DATEPART(wk,@DATE)+1 -DATEPART(wk,CAST(DATEPART(yy,@DATE) as CHAR(4))+&#39;0104&#39;) IF (@ISOweek=0) SET @ISOweek=dbo.ISOweek(CAST(DATEPART(yy,@DATE)-1 AS CHAR(4))+&#39;12&#39;+ CAST(24+DATEPART(DAY,@DATE) AS CHAR(2)))+1 IF ((DATEPART(mm,@DATE)=12) AND ((DATEPART(dd,@DATE)-DATEPART(dw,@DATE))>= 28)) SET @ISOweek=1 RETURN(@ISOweek) END;";

            //Create the user-defined function on the instance of SQL Server.   
            udf.Create();

            //Remove the user-defined function.   
           // udf.Drop();  
        }
        /// <summary>
        /// 涂聚文 2017-06-02
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            try
            {

                //涂聚文 2017-06-02
                Microsoft.SqlServer.Management.Common.ServerConnection serverconn = new ServerConnection(@"GEOVI-BD87B6B9C\GEOVINDU", "geovindu", "888888");
                string sqlConnectionString = @"Data Source=GEOVI-BD87B6B9C\GEOVINDU;Initial Catalog=Du;User ID=Geovin Du;Password=888888";
                //1.有报错问题
                //FileInfo file = new FileInfo("fu.sql");
                //string script = file.OpenText().ReadToEnd();
                //script = script.Replace("\t", " ").Replace("\n", " ");
                //SqlConnection conn = new SqlConnection(sqlConnectionString);
                //Server server = new Server(serverconn);//new ServerConnection(conn)
                //Database db = server.Databases["du"];
                //server.ConnectionContext.ExecuteNonQuery(script);//出问题

                    SqlConnection conn = new SqlConnection(sqlConnectionString);
                    conn.Open();
                string script = File.ReadAllText("fu.sql");

                    // split script on GO command
                    IEnumerable<string> commandStrings = Regex.Split(script, @"^\s*GO\s*$", RegexOptions.Multiline | RegexOptions.IgnoreCase);
                    foreach (string commandString in commandStrings)
                    {
                        if (commandString.Trim() != "")
                        {
                            new SqlCommand(commandString, conn).ExecuteNonQuery();
                        }
                    }
                    MessageBox.Show("Database updated successfully.");

               
               
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message.ToString());
            }
        }

        /// <summary>
        /// Run an .sql script trough sqlcmd.
        /// </summary>
        /// <param name="fileName">the .sql script</param>
        /// <param name="machineName">The name of the server.</param>
        /// <param name="databaseName">The name of the database to connect to.</param>
        /// <param name="trustedConnection">Use a trusted connection.</param>
        /// <param name="args">The arguments passed to the sql script.</param>
        public void RunSqlScript(string fileName, string machineName, string databaseName, bool trustedConnection, string[] args)
        {
            // simple checks
            if (!Path.GetExtension(fileName).Equals(".sql", StringComparison.InvariantCulture))
                throw new Exception("The file doesn&#39;t end with .sql.");

            // check for used arguments
            foreach (var shortArg in new[] { "S", "d", "E", "i" })
            {
                var tmpArg = args.SingleOrDefault(a => a.StartsWith(string.Format("-{0}", shortArg), StringComparison.InvariantCulture));
                if (tmpArg != null)
                    throw new ArgumentException(string.Format("Cannot pass -{0} argument to sqlcmd for a second time.", shortArg));
            }

            // check the params for trusted connection.
            var userArg = args.SingleOrDefault(a => a.StartsWith("-U", StringComparison.InvariantCulture));
            var passwordArg = args.SingleOrDefault(a => a.StartsWith("-P", StringComparison.InvariantCulture));
            if (trustedConnection)
            {
                if (userArg != null)
                    throw new ArgumentException("Cannot pass -H argument when trustedConnection is used.");
                if (passwordArg != null)
                    throw new ArgumentException("Cannot pass -P argument when trustedConnection is used.");
            }
            else
            {
                if (userArg == null)
                    throw new ArgumentException("Exspecting username(-H) argument when trustedConnection is not used.");
                if (passwordArg == null)
                    throw new ArgumentException("Exspecting password(-P) argument when trustedConnection is not used.");
            }


            // set the working directory. (can be needed with ouputfile)
            // TODO: Test if the above statement is correct
            var tmpDirectory = Directory.GetCurrentDirectory();
            var directory = Path.IsPathRooted(fileName) ? Path.GetDirectoryName(fileName) : Path.Combine(fileName);//this.ProjectRoot
            var file = Path.GetFileName(fileName);
            Directory.SetCurrentDirectory(directory);

            // create cmd line
            var cmd = string.Format(string.Format("SQLCMD -S {0} -d {1} -i \"{2}\"", machineName, databaseName, file));
            foreach (var argument in args.Where(a => a.StartsWith("-", StringComparison.InvariantCultureIgnoreCase)))
                cmd += " " + argument;
            if (trustedConnection)
                cmd += " -E";

            // create the process
            var process = new System.Diagnostics.Process();
            process.StartInfo.FileName = "cmd";
            process.StartInfo.CreateNoWindow = true;
            process.StartInfo.UseShellExecute = false;
            process.StartInfo.RedirectStandardOutput = true;
            process.StartInfo.RedirectStandardInput = true;

            // start the application
            process.Start();
            process.StandardInput.WriteLine("@ECHO OFF");
            process.StandardInput.WriteLine(string.Format("cd {0}", directory));
            process.StandardInput.WriteLine(cmd);
            process.StandardInput.WriteLine("EXIT");
            process.StandardInput.Flush();
            process.WaitForExit();

            // write the output to my debug folder and restore the current directory
           // Debug.Write(process.StandardOutput.ReadToEnd());
            Directory.SetCurrentDirectory(tmpDirectory);
        }

//              public void Restore(OdbcConnection sqlcon, string DatabaseFullPath, string backUpPath)
//           {
//               using (sqlcon)
//               {
//                   string UseMaster = "USE master";
//                   OdbcCommand UseMasterCommand = new OdbcCommand(UseMaster, sqlcon);
//                   UseMasterCommand.ExecuteNonQuery();
//                   // The below query will rollback any transaction which is running on that database and brings SQL Server database in a single user mode.
//                   string Alter1 = @"ALTER DATABASE
//                   [" + DatabaseFullPath + "] SET Single_User WITH Rollback Immediate";
//                   OdbcCommand Alter1Cmd = new OdbcCommand(Alter1, sqlcon);
//                   Alter1Cmd.ExecuteNonQuery();
//                   // The below query will restore database file from disk where backup was taken ....
//                   string Restore = @"RESTORE DATABASE
//                   [" + DatabaseFullPath + "] FROM DISK = N&#39;" +
//                   backUpPath + @"&#39; WITH  FILE = 1,  NOUNLOAD,  STATS = 10";
//                   OdbcCommand RestoreCmd = new OdbcCommand(Restore, sqlcon);
//                   RestoreCmd.ExecuteNonQuery();
//                   // the below query change the database back to multiuser
//                   string Alter2 = @"ALTER DATABASE
//                   [" + DatabaseFullPath + "] SET Multi_User";
//                   OdbcCommand Alter2Cmd = new OdbcCommand(Alter2, sqlcon);
//                   Alter2Cmd.ExecuteNonQuery();
//                   Cursor.Current = Cursors.Default;
//               }
//            }

　　

VS 2010 报错：

+ $exception {"混合模式程序集是针对“v2.0.50727”版的运行时生成的，在没有配置其他信息的情况下，无法在 4.0 运行时中加载该程序集。":null} System.Exception {System.IO.FileLoadException}

App.config 配置：

1.一种方式

<startup  useLegacyV2RuntimeActivationPolicy="true">
  <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
  <supportedRuntime version="v2.0.50727"/>
</startup>

2.二种方式

<startup useLegacyV2RuntimeActivationPolicy="true">
    <supportedRuntime version="v4.0"/>
  </startup>

　　

　

 

Atas ialah kandungan terperinci 关于csharp的实例教程. Untuk maklumat lanjut, sila ikut artikel berkaitan lain di laman web China PHP!