using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Collections;
using MySql.Data.MySqlClient;
namespace skylark.SqlTool
{
public class MySqlDBHelper
{
public static string connectionString = ConnectConfig.DBConnectionString;
public MySqlDBHelper()
{
}
private static void init(DataTable dtStru, MySql.Data.MySqlClient.MySqlDataAdapter adapter, MySqlConnection connection)
{
string strTableName = dtStru.TableName;
DataColumn[] colPkName = dtStru.PrimaryKey;
string strInsertField = "";
string strInsertValue = "";
string strUpdate = "";
//插入语句
string strInsertSql = "";
//修改语句
string strUpdateSql = "";
//删除语句
string strDeleteSql = "";
string strWhereSql = "";
foreach (DataColumn dc in colPkName)
{
if (strWhereSql == "")
strWhereSql = " where " + dc.ColumnName + @" = ?Original_" + dc.ColumnName;
else
strWhereSql += " and " + dc.ColumnName + @" = ?Original_" + dc.ColumnName;
}
MySql.Data.MySqlClient.MySqlCommand sqlInsertComm = new MySql.Data.MySqlClient.MySqlCommand();
MySql.Data.MySqlClient.MySqlCommand sqlUpdateComm = new MySql.Data.MySqlClient.MySqlCommand();
MySql.Data.MySqlClient.MySqlCommand sqlDeleteComm = new MySql.Data.MySqlClient.MySqlCommand();
//动态生成映射列
System.Data.Common.DataTableMapping dTableMap = new System.Data.Common.DataTableMapping("Table", strTableName);
foreach (DataColumn dcField in dtStru.Columns)
{
dTableMap.ColumnMappings.Add(dcField.ColumnName, dcField.ColumnName);
//如果不是自动增长的字段
if (!dcField.AutoIncrement)
{
if (strInsertField == "")
{
strInsertField = dcField.ColumnName;
strInsertValue = "?" + dcField.ColumnName;
}
else
{
strInsertField += "," + dcField.ColumnName;
strInsertValue += ",?" + dcField.ColumnName;
}
if (!dcField.Unique)
{
if (strUpdate == "")
{
strUpdate = dcField.ColumnName + "=?" + dcField.ColumnName;
}
else
{
strUpdate += "," + dcField.ColumnName + "=?" + dcField.ColumnName;
}
}
}
}
strInsertSql = @"INSERT INTO " + strTableName + " (" + strInsertField + ") values(" + strInsertValue + ")";
strUpdateSql = @"update " + strTableName + " set " + strUpdate + strWhereSql;
strDeleteSql = @"delete from " + strTableName + strWhereSql;
adapter.TableMappings.AddRange(new System.Data.Common.DataTableMapping[] { dTableMap });
//
// Adapter
//
adapter.DeleteCommand = sqlDeleteComm;
adapter.InsertCommand = sqlInsertComm;
adapter.UpdateCommand = sqlUpdateComm;
//
// sqlInsertComm
//
//动态生成插入语句
sqlInsertComm.CommandText = strInsertSql;
sqlInsertComm.Connection = connection;
BuildPara(sqlInsertComm, dtStru);
//
// sqlUpdateComm
//
sqlUpdateComm.CommandText = strUpdateSql;
sqlUpdateComm.Connection = connection;
BuildPara(sqlUpdateComm, dtStru);
BuildWherePara(sqlUpdateComm, dtStru);
//
// sqlDeleteComm
//
sqlDeleteComm.CommandText = strDeleteSql;
sqlDeleteComm.Connection = connection;
BuildWherePara(sqlDeleteComm, dtStru);
}
/// <summary>
/// 验证表结构
/// </summary>
/// <param name="dtStru">DataTable</param>
/// <param name="adapter"></param>
/// <param name="arlCol">在SQlServer表中的列名称</param>
private static void init(DataTable dtStru, MySqlDataAdapter adapter, MySqlConnection connection, ArrayList arlCol)
{
string strTableName = dtStru.TableName;
DataColumn[] colPkName = dtStru.PrimaryKey;
string strInsertField = "";
string strInsertValue = "";
string strUpdate = "";
//插入语句
string strInsertSql = "";
//修改语句
string strUpdateSql = "";
//删除语句
string strDeleteSql = "";
string strWhereSql = "";
foreach (DataColumn dc in colPkName)
{
if (strWhereSql == "")
strWhereSql = " where " + dc.ColumnName + @" = ?Original_" + dc.ColumnName;
else
strWhereSql += " and " + dc.ColumnName + @" = ?Original_" + dc.ColumnName;
}
MySqlCommand sqlInsertComm = new MySqlCommand();
MySqlCommand sqlUpdateComm = new MySqlCommand();
MySqlCommand sqlDeleteComm = new MySqlCommand();
//动态生成映射列
System.Data.Common.DataTableMapping dTableMap = new System.Data.Common.DataTableMapping("Table", strTableName);
foreach (DataColumn dcField in dtStru.Columns)
{
bool bnlIsExistCol = false;
dTableMap.ColumnMappings.Add(dcField.ColumnName, dcField.ColumnName);
//检查在表结构中是否存在
foreach (string aStr in arlCol)
{
if (aStr.Equals(dcField.ColumnName))
{
bnlIsExistCol = true;
}
}
//如果不是自动增长的字段
if (!dcField.AutoIncrement && bnlIsExistCol)
{
if (strInsertField == "")
{
strInsertField = dcField.ColumnName;
strInsertValue = "?" + dcField.ColumnName;
strUpdate = dcField.ColumnName + "=?" + dcField.ColumnName;
}
else
{
strInsertField += "," + dcField.ColumnName;
strInsertValue += ",?" + dcField.ColumnName;
strUpdate += "," + dcField.ColumnName + "=?" + dcField.ColumnName;
}
}
}
strInsertSql = @"INSERT INTO " + strTableName + " (" + strInsertField + ") values(" + strInsertValue + ")";
strUpdateSql = @"update " + strTableName + " set " + strUpdate + strWhereSql;
strDeleteSql = @"delete from " + strTableName + strWhereSql;
adapter.TableMappings.AddRange(new System.Data.Common.DataTableMapping[] { dTableMap });
//
// Adapter
//
adapter.DeleteCommand = sqlDeleteComm;
adapter.InsertCommand = sqlInsertComm;
adapter.UpdateCommand = sqlUpdateComm;
//
// sqlInsertComm
//
//动态生成插入语句
sqlInsertComm.CommandText = strInsertSql;
sqlInsertComm.Connection = connection;
BuildPara(sqlInsertComm, dtStru);
//
// sqlUpdateComm
//
sqlUpdateComm.CommandText = strUpdateSql;
sqlUpdateComm.Connection = connection;
BuildPara(sqlUpdateComm, dtStru);
BuildWherePara(sqlUpdateComm, dtStru);
//
// sqlDeleteComm
//
sqlDeleteComm.CommandText = strDeleteSql;
sqlDeleteComm.Connection = connection;
BuildWherePara(sqlDeleteComm, dtStru);
}
private static void BuildPara(MySql.Data.MySqlClient.MySqlCommand mSqlommand, DataTable dt)
{
foreach (DataColumn dc in dt.Columns)
{
//如果不是自动增长的字段， 创建参数
if (!dc.AutoIncrement)
{
switch (dc.DataType.Name.ToString())
{
case "String":
mSqlommand.Parameters.Add(new MySqlParameter("?" + dc.ColumnName, MySqlDbType.VarChar, 0, dc.ColumnName));
break;
case "Int16":
mSqlommand.Parameters.Add(new MySqlParameter("?" + dc.ColumnName, MySqlDbType.Int16, 0, dc.ColumnName));
break;
case "Int32":
mSqlommand.Parameters.Add(new MySqlParameter("?" + dc.ColumnName, MySqlDbType.Int32, 0, dc.ColumnName));
break;
case "Int64":
mSqlommand.Parameters.Add(new MySqlParameter("?" + dc.ColumnName, MySqlDbType.Int64, 0, dc.ColumnName));
break;
case "Decimal":
mSqlommand.Parameters.Add(new MySqlParameter("?" + dc.ColumnName, MySqlDbType.Decimal, 0, dc.ColumnName));
break;
case "Boolean":
mSqlommand.Parameters.Add(new MySqlParameter("?" + dc.ColumnName, MySqlDbType.Bit, 0, dc.ColumnName));
break;
case "DateTime":
mSqlommand.Parameters.Add(new MySqlParameter("?" + dc.ColumnName, MySqlDbType.DateTime, 0, dc.ColumnName));
break;
case "VarBinary":
mSqlommand.Parameters.Add(new MySqlParameter("?" + dc.ColumnName, MySqlDbType.VarBinary, 2147483647, dc.ColumnName));
break;
case "Byte[]":
mSqlommand.Parameters.Add(new MySqlParameter("?" + dc.ColumnName, MySqlDbType.VarBinary, 2147483647, dc.ColumnName));
break;
}
}
}
}
private static void BuildWherePara(MySql.Data.MySqlClient.MySqlCommand mSqlommand, DataTable dt)
{
foreach (DataColumn dc in dt.PrimaryKey)
{
switch (dc.DataType.Name.ToString())
{
case "String":
mSqlommand.Parameters.Add(new MySqlParameter("?Original_" + dc.ColumnName, MySqlDbType.VarChar, 0, dc.ColumnName));
break;
case "Int16":
mSqlommand.Parameters.Add(new MySqlParameter("?Original_" + dc.ColumnName, MySqlDbType.Int16, 0, dc.ColumnName));
break;
case "Int32":
mSqlommand.Parameters.Add(new MySqlParameter("?Original_" + dc.ColumnName, MySqlDbType.Int32, 0, dc.ColumnName));
break;
case "Int64":
mSqlommand.Parameters.Add(new MySqlParameter("?Original_" + dc.ColumnName, MySqlDbType.Int64, 0, dc.ColumnName));
break;
case "Decimal":
mSqlommand.Parameters.Add(new MySqlParameter("?Original_" + dc.ColumnName, MySqlDbType.Decimal, 0, dc.ColumnName));
break;
case "Boolean":
mSqlommand.Parameters.Add(new MySqlParameter("?Original_" + dc.ColumnName, MySqlDbType.Bit, 0, dc.ColumnName));
break;
case "DateTime":
mSqlommand.Parameters.Add(new MySqlParameter("?Original_" + dc.ColumnName, MySqlDbType.DateTime, 0, dc.ColumnName));
break;
}
}
}
/// <summary>
/// 根据表名返回所有列名称
/// </summary>
/// <param name="strTablename">表名称</param>
/// <returns></returns>
private static ArrayList GetColumn(string strTablename, MySqlTransaction myTrans)
{
try
{
MySqlParameter[] paramss =
{
new MySqlParameter{ParameterName="?table_name",Direction = ParameterDirection.Input, Value = strTablename}
};
// 执行存储过程，返回指定的结果集行数，同时返回总行数
DataSet ds = Query("select column_name from information_schema.COLUMNS where table_name= ?table_name",paramss);
if (ds != null && ds.Tables.Count > 0)
{
ArrayList arlCol = new ArrayList();
foreach (DataRow dr in ds.Tables[0].Rows)
{
arlCol.Add(dr["column_name"].ToString());
}
return arlCol;
};
return null;
}
catch (System.Exception e)
{
throw e;
}
}
private static void PrepareCommand(MySqlCommand cmd, MySqlConnection conn, MySqlTransaction trans, string cmdText, MySqlParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = CommandType.Text;
if (cmdParms != null)
{
foreach (MySqlParameter parameter in cmdParms)
{
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
(parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
cmd.Parameters.Add(parameter);
}
}
}
#region 查询
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
public static DataSet Query(string SQLString, params MySqlParameter[] cmdParms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlCommand cmd = new MySqlCommand();
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.Fill(ds, "ds");
cmd.Parameters.Clear();
}
catch (MySql.Data.MySqlClient.MySqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
}
public static DataSet Query(string SQLString,string strTablename, params MySqlParameter[] cmdParms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlCommand cmd = new MySqlCommand();
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
if (strTablename != "")
da.Fill(ds, strTablename);
else
da.Fill(ds);
cmd.Parameters.Clear();
}
catch (MySql.Data.MySqlClient.MySqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
}
/// <summary>
/// 根据SQLString 获取记录集
/// </summary>
/// <param name="commandText"></param>
/// <param name="strTabname"></param>
/// <returns></returns>
public static DataSet Query(string commandText, string strTabname)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlCommand cmd = new MySqlCommand();
PrepareCommand(cmd, connection, null, commandText, null);
using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
if (strTabname != "")
da.Fill(ds, strTabname);
else
da.Fill(ds);
}
catch (System.Exception e)
{
throw e;
}
return ds;
}
}
}
/// <summary>
/// 执行多条SQL
/// 2011-04-11 解决排序问题
/// </summary>
/// <param name="hstSQlTabel">Key： TableName Value： SQLs</param>
/// <returns></returns>
public static DataSet Query(ArrayList hstSQlTabel)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
connection.Open();
using (MySqlDataAdapter da = new MySqlDataAdapter())
{
DataSet data = new DataSet();
MySqlTransaction myTrans = connection.BeginTransaction();
da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
try
{
for (int i = 0; i < hstSQlTabel.Count; i++)
{
Hashtable hst = (Hashtable)hstSQlTabel[i];
foreach (DictionaryEntry hstSql in hst)
{
DataSet ds = new DataSet();
MySqlCommand cmd = new MySqlCommand();
PrepareCommand(cmd, connection,myTrans, hstSql.Value.ToString(), null);
da.SelectCommand = cmd;
if (hstSql.Key.ToString() != "")
da.Fill(ds, hstSql.Key.ToString());
else
da.Fill(ds);
data.Merge(ds);
}
}
myTrans.Commit();
}
catch (System.Exception e)
{
myTrans.Rollback();
throw e;
}
return data;
}
}
}
/// <summary>
/// 执行多条SQL
/// 2011-04-11 解决多表问题
/// </summary>
/// <param name="hstSQlTabel">Key： TableName Value： SQLs</param>
/// <returns></returns>
public static DataSet Query(Hashtable hstSqlTable)
{
ArrayList arList = new ArrayList();
arList.Add(hstSqlTable);
return Query(arList);
}
#endregion
#region 更新数据
/// <summary>
/// 根据记录集更新数据
/// </summary>
/// <param name="data">用户进行增加删除修改操作的记录集</param>
/// <returns></returns>
public static string UpdateData(DataSet data)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
connection.Open();
string blnResult = "";
int intTableNum = data.Tables.Count;
MySqlDataAdapter[] adapter = new MySqlDataAdapter[intTableNum];
MySqlTransaction myTrans = connection.BeginTransaction();
try
{
for (int i = 0; i < intTableNum; i++)
{
MySqlDataAdapter adapterTmp = new MySqlDataAdapter();
adapter[i] = adapterTmp;
init(data.Tables[i], adapter[i],connection);
adapter[i].UpdateCommand.Transaction = myTrans;
adapter[i].DeleteCommand.Transaction = myTrans;
adapter[i].InsertCommand.Transaction = myTrans;
}
for (int i = 0; i < intTableNum; i++)
{
if (data.GetChanges(DataRowState.Deleted) != null) adapter[intTableNum - i - 1].Update(data.GetChanges(DataRowState.Deleted));
if (data.GetChanges(DataRowState.Added) != null) adapter[i].Update(data.GetChanges(DataRowState.Added));
if (data.GetChanges(DataRowState.Modified) != null) adapter[i].Update(data.GetChanges(DataRowState.Modified));
}
myTrans.Commit();
}
catch (Exception e)
{
myTrans.Rollback();
blnResult = e.Message;
throw e;
}
return blnResult;
}
}
/// <summary>
/// 根据记录集更新数据
/// 参数记录集data， 与SQlServer表结构不一致时使用（--待更新表的字段关联了一些其他表的字段）
/// ***
/// </summary>
/// <param name="data">用户进行增加删除修改操作的记录集</param>
/// <returns></returns>
public static string UpdateDataCheckField(DataSet data)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
string blnResult = "";
int intTableNum = data.Tables.Count;
connection.Open();
MySqlDataAdapter[] adapter = new MySqlDataAdapter[intTableNum];
MySqlTransaction myTrans = connection.BeginTransaction();
try
{
for (int i = 0; i < intTableNum; i++)
{
ArrayList arlCol = GetColumn(data.Tables[i].TableName, myTrans);
MySqlDataAdapter adapterTmp = new MySqlDataAdapter();
adapter[i] = adapterTmp;
init(data.Tables[i], adapter[i],connection, arlCol);
adapter[i].UpdateCommand.Transaction = myTrans;
adapter[i].DeleteCommand.Transaction = myTrans;
adapter[i].InsertCommand.Transaction = myTrans;
}
for (int i = 0; i < intTableNum; i++)
{
if (data.GetChanges(DataRowState.Deleted) != null) adapter[intTableNum - i - 1].Update(data.GetChanges(DataRowState.Deleted));
if (data.GetChanges(DataRowState.Added) != null) adapter[i].Update(data.GetChanges(DataRowState.Added));
if (data.GetChanges(DataRowState.Modified) != null) adapter[i].Update(data.GetChanges(DataRowState.Modified));
}
myTrans.Commit();
}
catch (Exception e)
{
myTrans.Rollback();
blnResult = e.Message;
throw e;
}
return blnResult;
}
}
#endregion
#region 获取主键，更新主键表
/// <summary>
/// 更新当前主键编号，获取主键编号
/// </summary>
/// <param name="strFieldKey">主键标识--两位</param>
/// <returns>Return[0]：成功与否；Return[1]：返回主键</returns>
public static string[] getOrderNO(string strFieldKey)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
string[] blnResult = new string[2];
blnResult[0] = "";
blnResult[1] = "";
connection.Open();
string scommandtext = "SELECT KeyGroup,KeyNumber FROM PriOrders where KeyGroup = '" + strFieldKey + "'";
MySqlCommand cmd = new MySqlCommand();
MySqlTransaction myTrans = connection.BeginTransaction();
PrepareCommand(cmd, connection,myTrans, scommandtext, null);
using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
{
try
{
DataSet dsOrder = new DataSet();
da.Fill(dsOrder, basOrderData.BASORDER_TABLE);
string strKeyNum = dsOrder.Tables[basOrderData.BASORDER_TABLE].Rows[0][basOrderData.START_NUMBER_FIELD].ToString();
if (strKeyNum == DBNull.Value.ToString() || strKeyNum == "")
{
strKeyNum = strFieldKey + DateTime.Today.ToString("yyyyMMdd") + "000001";
}
else
{
if (DateTime.Today.ToString("yyyyMMdd") == strKeyNum.Substring(2, 8))
{
int intNum = int.Parse(strKeyNum.Substring(10, 6));
intNum = 1000001 + intNum;
strKeyNum = strKeyNum.Substring(0, 10) + intNum.ToString().Substring(1, 6);
}
else
{
strKeyNum = strFieldKey + DateTime.Today.ToString("yyyyMMdd") + "000001";
}
}
//更新主键值
MySqlCommand updatecommand = new MySqlCommand("update PriOrders set KeyNumber = '" + strKeyNum + "' where KeyGroup = '" + strFieldKey + "'", connection);
updatecommand.Transaction = myTrans;
updatecommand.ExecuteNonQuery();
blnResult[1] = strKeyNum;
myTrans.Commit();
}
catch (Exception e)
{
myTrans.Rollback();
blnResult[0] = e.Message;
throw e;
}
return blnResult;
}
}
}
public static string[] getOrderNO(string strFieldKey, int OrderNum)
{
string[] blnResult = new string[2];
blnResult[0] = "";
blnResult[1] = "";
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
connection.Open();
MySqlTransaction myTrans = connection.BeginTransaction();
try
{
string scommandtext = "SELECT KeyGroup,KeyNumber FROM PriOrders where KeyGroup = '" + strFieldKey + "'";
MySqlCommand cmd = new MySqlCommand();
PrepareCommand(cmd, connection, myTrans, scommandtext, null);
using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
{
DataSet dsOrder = new DataSet();
da.Fill(dsOrder, basOrderData.BASORDER_TABLE);
string strKeyNum = dsOrder.Tables[basOrderData.BASORDER_TABLE].Rows[0][basOrderData.START_NUMBER_FIELD].ToString();
string strKeyNumB = dsOrder.Tables[basOrderData.BASORDER_TABLE].Rows[0][basOrderData.START_NUMBER_FIELD].ToString();
if (strKeyNum == DBNull.Value.ToString() || strKeyNum == "")
{
int intNum = 1000001 + OrderNum;
strKeyNum = strFieldKey + DateTime.Today.ToString("yyyyMMdd") + intNum.ToString().Substring(1, 6);
strKeyNumB = strFieldKey + DateTime.Today.ToString("yyyyMMdd") + "000001";
}
else
{
if (DateTime.Today.ToString("yyyyMMdd") == strKeyNum.Substring(2, 8))
{
int intNum = int.Parse(strKeyNum.Substring(10, 6));
intNum = 1000001 + intNum + OrderNum;
int intNumB = 1000001 + intNum;
strKeyNum = strKeyNum.Substring(0, 10) + intNum.ToString().Substring(1, 6);
strKeyNumB = strKeyNum.Substring(0, 10) + intNumB.ToString().Substring(1, 6);
}
else
{
int intNum = 1000001 + OrderNum;
strKeyNum = strFieldKey + DateTime.Today.ToString("yyyyMMdd") + intNum.ToString().Substring(1, 6);
strKeyNumB = strFieldKey + DateTime.Today.ToString("yyyyMMdd") + "000001";
}
}
//更新主键值
MySqlCommand updatecommand = new MySqlCommand("update PriOrders set KeyNumber = '" + strKeyNum + "' where KeyGroup = '" + strFieldKey + "'", connection);
updatecommand.Transaction = myTrans;
updatecommand.ExecuteNonQuery();
blnResult[1] = strKeyNumB;
myTrans.Commit();
}
}
catch (Exception e)
{
myTrans.Rollback();
blnResult[0] = e.Message;
throw e;
}
return blnResult;
}
}
#endregion
/// <summary>
/// 执行SQL语句，返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string SQLString)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
{
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
connection.Close();
throw e;
}
}
}
}
/// <summary>
/// 执行SQL语句，返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string SQLString, params MySqlParameter[] cmdParms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
int rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
throw e;
}
}
}
}
/// <summary>
/// 是否存在
/// </summary>
/// <param name="strSql"></param>
/// <returns></returns>
public static bool Exists(string strSql)
{
object obj = GetSingle(strSql);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
/// <summary>
/// 是否存在（基于MySqlParameter）
/// </summary>
/// <param name="strSql"></param>
/// <param name="cmdParms"></param>
/// <returns></returns>
public static bool Exists(string strSql, params MySqlParameter[] cmdParms)
{
object obj = GetSingle(strSql, cmdParms);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（object）。
/// </summary>
/// <param name="SQLString">计算查询结果语句</param>
/// <returns>查询结果（object）</returns>
public static object GetSingle(string SQLString)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
{
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
connection.Close();
throw e;
}
}
}
}
public static object GetSingle(string SQLString, int Times)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
{
try
{
connection.Open();
cmd.CommandTimeout = Times;
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
connection.Close();
throw e;
}
}
}
}
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（object）。
/// </summary>
/// <param name="SQLString">计算查询结果语句</param>
/// <returns>查询结果（object）</returns>
public static object GetSingle(string SQLString, params MySqlParameter[] cmdParms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
object obj = cmd.ExecuteScalar();
cmd.Parameters.Clear();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
throw e;
}
}
}
}
/// <summary>
/// 执行存储过程，返回影响的行数
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="rowsAffected">影响的行数</param>
/// <returns></returns>
public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
int result;
connection.Open();
MySqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
rowsAffected = command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
//Connection.Close();
return result;
}
}
/// <summary>
/// 创建 SqlCommand 对象实例(用来返回一个整数值)
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlCommand 对象实例</returns>
private static MySqlCommand BuildIntCommand(MySqlConnection connection, string storedProcName, IDataParameter[] parameters)
{
MySqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.Parameters.Add(new MySqlParameter("ReturnValue",
MySqlDbType.Int16, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
return command;
}
/// <summary>
/// 构建 SqlCommand 对象(用来返回一个结果集，而不是一个整数值)
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlCommand</returns>
private static MySqlCommand BuildQueryCommand(MySqlConnection connection, string storedProcName, IDataParameter[] parameters)
{
MySqlCommand command = new MySqlCommand(storedProcName, connection);
command.CommandType = CommandType.StoredProcedure;
if (parameters != null)
{
foreach (MySqlParameter parameter in parameters)
{
if (parameter != null)
{
// 检查未分配值的输出参数,将其分配以DBNull.Value.
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
(parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
command.Parameters.Add(parameter);
}
}
}
return command;
}
private static DataSet RunProcedureNoConn(string storedProcName, IDataParameter[] parameters, MySqlTransaction myTrans)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlDataAdapter adapter = new MySqlDataAdapter();
DataSet data = new DataSet();
try
{
adapter.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
adapter.SelectCommand.Transaction = myTrans;
adapter.Fill(data, storedProcName);
}
catch (System.Exception e)
{
throw e;
}
return data;
}
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="tableName">DataSet结果中的表名</param>
/// <returns>DataSet</returns>
public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
DataSet dataSet = new DataSet();
MySqlDataAdapter sqlDA = new MySqlDataAdapter();
try
{
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
sqlDA.Fill(dataSet, tableName);
}
catch (Exception)
{
throw;
}
return dataSet;
}
}
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">多条SQL语句</param>
public static int ExecuteSqlTran(List<String> SQLStringList)
{
using (MySqlConnection conn = new MySqlConnection(connectionString))
{
conn.Open();
MySqlCommand cmd = new MySqlCommand();
cmd.Connection = conn;
MySqlTransaction tx = conn.BeginTransaction();
cmd.Transaction = tx;
try
{
int count = 0;
for (int n = 0; n < SQLStringList.Count; n++)
{
string strsql = SQLStringList[n];
if (strsql.Trim().Length > 1)
{
cmd.CommandText = strsql;
count += cmd.ExecuteNonQuery();
}
}
tx.Commit();
return count;
}
catch
{
tx.Rollback();
return 0;
}
}
}
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的MySqlParameter[]）</param>
public static void ExecuteSqlTran(Hashtable SQLStringList)
{
using (MySqlConnection conn = new MySqlConnection(connectionString))
{
conn.Open();
using (MySqlTransaction trans = conn.BeginTransaction())
{
MySqlCommand cmd = new MySqlCommand();
try
{
//循环
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText = myDE.Key.ToString();
MySqlParameter[] cmdParms = (MySqlParameter[])myDE.Value;
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
}
trans.Commit();
}
catch
{
trans.Rollback();
throw;
}
}
}
}
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的MySqlParameter[]）</param>
public static void ExecuteSqlTranWithIndentity(Hashtable SQLStringList)
{
using (MySqlConnection conn = new MySqlConnection(connectionString))
{
conn.Open();
using (MySqlTransaction trans = conn.BeginTransaction())
{
MySqlCommand cmd = new MySqlCommand();
try
{
int indentity = 0;
//循环
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText = myDE.Key.ToString();
MySqlParameter[] cmdParms = (MySqlParameter[])myDE.Value;
foreach (MySqlParameter q in cmdParms)
{
if (q.Direction == ParameterDirection.InputOutput)
{
q.Value = indentity;
}
}
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
foreach (MySqlParameter q in cmdParms)
{
if (q.Direction == ParameterDirection.Output)
{
indentity = Convert.ToInt32(q.Value);
}
}
cmd.Parameters.Clear();
}
trans.Commit();
}
catch
{
trans.Rollback();
throw;
}
}
}
}
}
}
