关于csharp的实例教程
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2022-03-10 17:23:02
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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))+'0104') IF (@ISOweek=0) SET @ISOweek=dbo.ISOweek(CAST(DATEPART(yy,@DATE)-1 AS CHAR(4))+'12'+ 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'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'" +
// backUpPath + @"' 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>
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