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【CSharp】操作SQL Server数据库方法
作者:HYUO / 发布于2014/12/29/ 696
用于连接数据库，获取DataTable，DataSet, 执行非查询SQL语句，暴力Insert操作, 存储过程和SQL脚本文件

	//数据库操作类
	//HYUO
	//2014-08-30
	//Ver 1.0.1.2356
	//============================================//
	using System;
	using System.Configuration;
	using System.Data;
	using System.Data.SqlClient;
	using System.IO;
	using System.Text;
	using Microsoft.SqlServer.Management.Common;
	using Microsoft.SqlServer.Management.Smo;
	
	namespace HYCRM.Common.CommDB
	{
	 /// <summary>
	 /// 数据库操作类
	 /// </summary>
	 public class DbOperation
	 {
	 //从配置文件(App.config)中获取连接字符串
	 public static string connectionString = ConfigurationManager.AppSettings["HYCRM_DB_CONNECTION"].ToString();
	 //定义SqlConnection
	 private static SqlConnection objSqlConn = null;
	
	 /// <summary>
	 /// 连接数据库
	 /// </summary>
	 private static void GetConnection()
	 {
	 try
	 {
	 if(objSqlConn == null)
	 {
	 objSqlConn = new SqlConnection(connectionString);
	 objSqlConn.Open();
	 }
	 }
	 catch (Exception ex)
	 {
	 throw ex;
	 }
	 }
	
	 /// <summary>
	 /// 根据查询SQL字符串，获取DataTable
	 /// </summary>
	 ///<param name = "strSelectSql">查询SQL字符串</param>
	 ///<returns>返回DataSet</returns>
	 public static DataTable GetDataTable(string strSelectSql)
	 {
	 try
	 {
	 GetConnection();
	 DataTable dtTarget = new DataTable();
	 using (SqlDataAdapter objSqlDataAdapter = new SqlDataAdapter(strSelectSql, objSqlConn))
	 {
	 objSqlDataAdapter.Fill(dtTarget);
	 }
	 return dtTarget;
	 }
	 catch (Exception ex)
	 {
	 throw ex;
	 }
	 finally
	 {
	 if (objSqlConn != null)
	 {
	 objSqlConn.Close();
	 objSqlConn.Dispose();
	 objSqlConn = null;
	 }
	 }
	 }
	
	 /// <summary>
	 /// 根据查询SQL字符串数组，获取DataSet
	 /// </summary>
	 ///<param name = "strSelectSqlSet">查询SQL字符串数组</param>
	 ///<returns>返回DataSet</returns>
	 public static DataSet GetDataSet(string[] strSelectSqlSet)
	 {
	 try
	 {
	 GetConnection();
	 DataSet dsTarget = new DataSet();
	 if (strSelectSqlSet.Length > 0)
	 {
	 for (int i = 0; i < strSelectSqlSet.Length; i++)
	 {
	 dsTarget.Tables.Add(GetDataTable(strSelectSqlSet[i]));
	 dsTarget.Tables[i].TableName = "DT" + i.ToString();
	 }
	 }
	 return dsTarget;
	 }
	 catch (Exception ex)
	 {
	 throw ex;
	 }
	 finally
	 {
	 if (objSqlConn != null)
	 {
	 objSqlConn.Close();
	 objSqlConn.Dispose();
	 objSqlConn = null;
	 }
	 }
	 }
	
	 /// <summary>
	 /// 将DataGridView的数据源更新到数据库中
	 /// </summary>
	 /// <param name="dtResult">数据源</param>
	 /// <returns>执行状态</returns>
	 public static bool UpdateDataSource(DataTable dtResult, string strDestinationTableName)
	 {
	 try
	 {
	 StringBuilder sbSQL = new StringBuilder();
	 sbSQL.AppendLine("TRUNCATE TABLE [dbo].[" + strDestinationTableName + "]");
	 ExecuteNonQuery(sbSQL.ToString());
	 ExecuteSqlBulkCopy(dtResult, strDestinationTableName);
	 return true;
	 }
	 catch (Exception ex)
	 {
	 throw ex;
	 }
	 }
	
	 /// <summary>
	 /// 执行非查询SQL字符串，如Insert，Update，Delete
	 /// </summary>
	 ///<param name = "strSql">非查询SQL字符串</param>
	 ///<returns>返回受影响的行数</returns>
	 public static int ExecuteNonQuery(string strSql)
	 {
	 try
	 {
	 GetConnection();
	 int intResult = 0;
	 using (SqlCommand objSqlCmd = new SqlCommand(strSql, objSqlConn))
	 {
	 intResult = objSqlCmd.ExecuteNonQuery();
	 }
	 return intResult;
	 }
	 catch (Exception ex)
	 {
	 throw ex;
	 }
	 finally
	 {
	 if (objSqlConn != null)
	 {
	 objSqlConn.Close();
	 objSqlConn.Dispose();
	 objSqlConn = null;
	 }
	 }
	 }
	
	 /// <summary>
	 /// 执行数据快速插入或复制,要求数据源DataTable的表结构与目标表完全一致
	 /// </summary>
	 ///<param name = "dtSource">数据源DataTable</param>
	 ///<param name = "strDestinationTableName">目标表名称</param>
	 ///<returns>返回执行状态</returns>
	 public static bool ExecuteSqlBulkCopy(DataTable dtSource, string strDestinationTableName)
	 {
	 try
	 {
	 GetConnection();
	 using (SqlBulkCopy objSqlBulkCopy = new SqlBulkCopy(objSqlConn))
	 {
	 objSqlBulkCopy.DestinationTableName = strDestinationTableName;
	 for (int i = 0; i < dtSource.Columns.Count; i++)
	 {
	 objSqlBulkCopy.ColumnMappings.Add(i, i);
	 }
	 objSqlBulkCopy.WriteToServer(dtSource);
	 }
	 return true;
	 }
	 catch (Exception ex)
	 {
	 throw ex;
	 }
	 finally
	 {
	 if (objSqlConn != null)
	 {
	 objSqlConn.Close();
	 objSqlConn.Dispose();
	 objSqlConn = null;
	 }
	 }
	 }
	
	 /// <summary>
	 /// 执行存储过程
	 /// </summary>
	 /// <param name="strStoreProcName">存储过程名称</param>
	 /// <param name="strParametersName">参数名集合</param>
	 /// <param name="strParameterValue">参数值集合</param>
	 /// <returns>执行状态</returns>
	 public static bool ExecuteStoreProcedure(string strStoreProcName, string[] strParametersName, string[] strParameterValue)
	 {
	 try
	 {
	 GetConnection();
	 using (SqlCommand objSqlCmd = new SqlCommand(strStoreProcName, objSqlConn))
	 {
	 objSqlCmd.CommandType = CommandType.StoredProcedure;
	 int intParaCount = strParametersName.Length;
	 for (int i = 0; i < intParaCount; i++)
	 {
	 objSqlCmd.Parameters.Add(strParametersName[i], SqlDbType.NVarChar);
	 objSqlCmd.Parameters[strParametersName[i]].Value = strParameterValue[i];
	 }
	 objSqlCmd.ExecuteNonQuery();
	 }
	 return true;
	 }
	 catch (Exception ex)
	 {
	 throw ex;
	 }
	 finally
	 {
	 if (objSqlConn != null)
	 {
	 objSqlConn.Close();
	 objSqlConn.Dispose();
	 objSqlConn = null;
	 }
	 }
	 }
	
	 /// <summary>
	 /// 执行SQL脚本文件,必须引用Microsoft.SqlServer.ConnectionInfo.dll， Microsoft.SqlServer.Management.Sdk.Sfc.dll， Microsoft.SqlServer.Smo.dll缺一不可
	 /// </summary>
	 /// <param name="strFileFullPath">SQL脚本文件的完整路径</param>
	 public static void ExecuteSqlScriptFile(string strFileFullPath)
	 {
	 try
	 {
	 GetConnection();
	 FileInfo objFileInfo = new FileInfo(strFileFullPath);
	 string SqlScript = objFileInfo.OpenText().ReadToEnd();
	 Server objServer = new Server(new ServerConnection(objSqlConn));
	 objServer.ConnectionContext.ExecuteNonQuery(SqlScript);
	 }
	 catch (Exception ex)
	 {
	 throw ex;
	 }
	 finally
	 {
	 if (objSqlConn != null)
	 {
	 objSqlConn.Close();
	 objSqlConn.Dispose();
	 objSqlConn = null;
	 }
	 }
	 }
	 }
	}
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