using System;
using System.Data ;
using System.Data.SqlClient ;
using System.Data.SqlTypes ;
using System.Windows.Forms ;
using System.Collections;
namespace Database
{
///
1<summary>
2/// Database 的摘要说明。
3/// </summary>
public class Database
{
///
1<summary>
2/// 属性
3/// </summary>
// public DataSet dataSet
// {
// get
// {
// return m_DataSet;
// }
//
// }
public Database()
{
//
// TODO: 在此处添加构造函数逻辑
//
XmlRead ConStr=new XmlRead();
if (ConStr.ReadAllConnectNode())
{
constr= ConStr.connstring ;
// try
// {
//
// Open();
// }
// catch(Exception Ex)
// {
// MessageBox.Show("数据库连接错误"+Ex.ToString () );
//
// }
}
else
{
constr="-1";
//throw new SqlErrorCollection();
}
}
// public bool Open()
// {
//
// mcn.ConnectionString = constr;
// try
// {
// mcn.Open();
//
// }
// catch( Exception)
// {
// return false;
// }
// return true;
// }
///
1<summary>
2/// 默认获取DataSet
3/// </summary>
///
1<param name="pMyTableName"/>
///
1<param name="tmpMyComputerName"/>
///
1<returns></returns>
// public virtual int getData (string pMyTableName ,string tmpMyComputerName)
// {
// return -1;
//
// }
#region ExecuteNonQuery
///
1<summary>
2/// 执行一个SQL Command(使用ConnectString)
3/// </summary>
///
1<param name="connString"/>
ConnectString（Sql连接字符串）
///
1<param name="cmdType"/>
Command类型
///
1<param name="cmdText"/>
Command的语句（SQL语句）
///
1<param name="cmdParms"/>
Command的参数（SqlParameter[]数组类型）
///
1<returns>Command的返回值（受影响的行数）</returns>
public int ExecuteNonQuery(string connString, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms)
{
SqlCommand cmd = new SqlCommand();
using (SqlConnection conn = new SqlConnection(connString))
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
}
///
1<summary>
2/// 执行一个SQL Command(使用隐含的ConnectString)
3/// </summary>
///
1<param name="cmdType"/>
Command类型
///
1<param name="cmdText"/>
Command的语句（SQL语句）
///
1<param name="cmdParms"/>
Command的参数（SqlParameter[]数组类型）
///
1<returns>Command的返回值（受影响的行数）</returns>
public int ExecuteNonQuery(CommandType cmdType, string cmdText, params SqlParameter[] cmdParms)
{
SqlCommand cmd = new SqlCommand();
using (SqlConnection conn = new SqlConnection(constr))
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
}
// public static int ExecuteNonQuery(string cmdText)
// {
// }
///
1<summary>
2/// 执行一个简单的查询, 只需要输入SQL语句, 一般用于更新或者删除
3/// </summary>
///
1<param name="sqlText"/>
///
1<returns></returns>
public int ExecuteNonQuery(string sqlText)
{
return ExecuteNonQuery(CommandType.Text,sqlText);
}
///
1<summary>
2/// 执行一个SQL Command(使用SqlTransaction)
3/// </summary>
///
1<param name="trans"/>
使用的SqlTransaction
///
1<param name="cmdType"/>
Command类型
///
1<param name="cmdText"/>
Command的语句（SQL语句）
///
1<param name="cmdParms"/>
Command的参数（SqlParameter[]数组类型）
///
1<returns>Command的返回值（受影响的行数）</returns>
public int ExecuteNonQuery(SqlTransaction trans, CommandType cmdType,string cmdText, params SqlParameter[] cmdParms)
{
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
///
1<summary>
2/// 根据指定DsCommandType类型，自动生成cmd执行dataset的更新
3/// </summary>
///
1<param name="connString"/>
ConnectString（Sql连接字符串）
///
1<param name="cmdType"/>
Command类型
///
1<param name="dsCommandType"/>
Enum类型
///
1<param name="cmdText"/>
Command的语句（SQL语句）
///
1<param name="dataset"/>
dataset
///
1<param name="tablename"/>
表名
///
1<param name="cmdParms"/>
Command的参数（SqlParameter[]数组类型）
///
1<returns>是否更新成功</returns>
public bool ExecuteNonQuery(string connString,CommandType cmdType,CommandEnum.DsCommandType dsCommandType,string cmdText,DataSet dataset,string tablename,params SqlParameter[] cmdParms)
{
SqlDataAdapter dsCommand = new SqlDataAdapter();
SqlCommand cmd = new SqlCommand();
using (SqlConnection conn = new SqlConnection(connString))
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
foreach (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
switch(dsCommandType)
{
case CommandEnum.DsCommandType.InsertCommand:
dsCommand.InsertCommand = cmd;
break;
case CommandEnum.DsCommandType.UpdateCommand:
dsCommand.UpdateCommand = cmd;
break;
case CommandEnum.DsCommandType.DeleteCommand:
dsCommand.DeleteCommand = cmd;
break;
default:break;
}
dsCommand.Update(dataset,tablename);
if ( dataset.HasErrors )
{
dataset.Tables[tablename].GetErrors()[0].ClearErrors();
return false;
}
else
{
dataset.AcceptChanges();
return true;
}
}
}
///
1<summary>
2/// 更新一个记录集(使用connString)
3/// </summary>
///
1<param name="connString"/>
ConnectString（Sql连接字符串）
///
1<param name="cmdInsertType"/>
commandInsert类型
///
1<param name="cmdInsertText"/>
SQL语句（Insert）
///
1<param name="cmdUpdateType"/>
commandUpdate类型
///
1<param name="cmdUpdateText"/>
SQL语句（Update）
///
1<param name="cmdInsertType"/>
commandDelete类型
///
1<param name="cmdDeleteText"/>
SQL语句（Delete）
///
1<param name="cmdInsertParms"/>
InsertCommand参数
///
1<param name="cmdUpdateParms"/>
UpdateCommand参数
///
1<param name="cmdDeleteParms"/>
DeleteCommand参数
///
1<param name="dataset"/>
dataset
///
1<param name="tablename"/>
表名
///
1<returns>是否更新成功</returns>
public bool UpdateDataset(string connString,CommandType cmdInsertType,string cmdInsertText,CommandType cmdUpdateType,string cmdUpdateText,CommandType cmdDeleteType,string cmdDeleteText,SqlParameter[] cmdInsertParms,SqlParameter[] cmdUpdateParms,SqlParameter[] cmdDeleteParms,DataSet dataset,string tablename)
{
SqlDataAdapter dsCommand = new SqlDataAdapter();
using (SqlConnection conn = new SqlConnection(connString))
{
if (conn.State != ConnectionState.Open)
conn.Open();
if(cmdInsertText != String.Empty)
{
SqlCommand cmdInsert = new SqlCommand();
cmdInsert.Connection = conn;
cmdInsert.CommandText = cmdInsertText;
cmdInsert.CommandType = cmdInsertType;
if (cmdInsertParms != null)
{
foreach (SqlParameter parm in cmdInsertParms)
cmdInsert.Parameters.Add(parm);
}
dsCommand.InsertCommand = cmdInsert;
}
if(cmdUpdateText != String.Empty)
{
SqlCommand cmdUpdate = new SqlCommand();
cmdUpdate.Connection = conn;
cmdUpdate.CommandText = cmdUpdateText;
cmdUpdate.CommandType = cmdUpdateType;
if (cmdUpdateParms != null)
{
foreach (SqlParameter parm in cmdUpdateParms)
cmdUpdate.Parameters.Add(parm);
}
dsCommand.UpdateCommand = cmdUpdate;
}
if(cmdDeleteText != String.Empty)
{
SqlCommand cmdDelete = new SqlCommand();
cmdDelete.Connection = conn;
cmdDelete.CommandText = cmdDeleteText;
cmdDelete.CommandType = cmdDeleteType;
if (cmdDeleteParms != null)
{
foreach (SqlParameter parm in cmdDeleteParms)
cmdDelete.Parameters.Add(parm);
}
dsCommand.DeleteCommand = cmdDelete;
}
if(cmdInsertText == String.Empty && cmdUpdateText == String.Empty && cmdDeleteText == String.Empty)
{
SqlCommandBuilder scb = new SqlCommandBuilder(dsCommand);
return false;
}
dsCommand.Update(dataset,tablename);
if ( dataset.HasErrors )
{
dataset.Tables[tablename].GetErrors()[0].ClearErrors();
return false;
}
else
{
dataset.AcceptChanges();
return true;
}
}
}
#endregion
#region ExecuteReader
///
1<summary>
2/// 获取一个SqlDataReader(使用connString)
3/// </summary>
///
1<param name="connString"/>
ConnectString
///
1<param name="cmdType"/>
类型
///
1<param name="cmdText"/>
Command的语句(select语句)
///
1<param name="cmdParms"/>
Command的参数
///
1<returns>所需要的SqlDataReader</returns>
public SqlDataReader ExecuteReader(string connString, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms)
{
SqlCommand cmd = new SqlCommand();
SqlConnection conn = new SqlConnection(connString);
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return rdr;
}
catch
{
conn.Close();
throw;
}
}
///
1<summary>
2/// 获取一个SqlDataReader(使用connString), 使用缺省的ConnectionString
3/// </summary>
///
1<param name="cmdType"/>
类型
///
1<param name="cmdText"/>
Command的语句(select语句)
///
1<param name="cmdParms"/>
Command的参数
///
1<returns>SqlDataReader</returns>
public SqlDataReader ExecuteReader(CommandType cmdType, string cmdText, params SqlParameter[] cmdParms)
{
SqlCommand cmd = new SqlCommand();
SqlConnection conn = new SqlConnection(constr);
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return rdr;
}
catch
{
conn.Close();
throw;
}
}
///
1<summary>
2/// 获取一个SqlDataReader, 使用缺省的ConnectionString
3/// </summary>
///
1<param name="cmdtxt"/>
语句命令
///
1<returns></returns>
public SqlDataReader ExecuteReader(string cmdtxt)
{
SqlCommand cmd = new SqlCommand();
SqlConnection conn = new SqlConnection(constr);
try
{
cmd=new SqlCommand(cmdtxt,conn);
conn.Open();
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return rdr;
}
catch
{
conn.Close();
throw;
}
}
#endregion
#region private函数
///
1<summary>
2/// 准备一个Command(使用SqlParameter[]数组)
3/// </summary>
private void PrepareCommand (SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
{
try
{
conn.Open();
}
catch(Exception Ex)
{
throw Ex;
//string a = Ex.ToString();
//return;
}
}
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
foreach (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
private void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameterCollection cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
foreach (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
///
1<summary>
2/// 加入一个以字段名为名称的param
3/// </summary>
///
1<param name="fld"/>
///
1<returns></returns>
private SqlParameter NewFieldParam(string fld)
{
SqlParameter param = new SqlParameter();
param.ParameterName = "@" + fld;
param.SourceColumn = fld;
return param;
}
///
1<summary>
2/// 判断字符是否在一个集合中
3/// </summary>
///
1<param name="str"/>
///
1<param name="ExcludeFields"/>
///
1<returns></returns>
private bool InColleciton(string str,IList ExcludeFields)
{
foreach(string s in ExcludeFields)
{
if(s.ToUpper()==str.ToUpper())
return true;
}
return false;
}
#endregion
#region 填充DataSet
///
1<summary>
2/// 将数据填充到DataSet中(无connString)
3/// </summary>
///
1<param name="cmdType"/>
类型
///
1<param name="cmdText"/>
Command的语句
///
1<param name="tablename"/>
表名
///
1<param name="cmdParms"/>
Command的参数
public void FillData(CommandType cmdType,string cmdText,DataSet dataset,string tablename,params SqlParameter[] cmdParms)
{
SqlDataAdapter dsCommand = new SqlDataAdapter();
SqlCommand cmd = new SqlCommand();
dsCommand.SelectCommand = cmd;
//dsCommand.TableMappings.Add("Table",tablename);
using (SqlConnection conn = new SqlConnection(constr))
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
dsCommand.Fill(dataset,tablename);
}
}
///
1<summary>
2/// 将数据填充到DataSet中(使用connString + SqlParameterCollection)
3/// </summary>
///
1<param name="connString"/>
ConnectString
///
1<param name="cmdType"/>
类型
///
1<param name="cmdText"/>
Command的语句
///
1<param name="tablename"/>
表名
///
1<param name="cmdParms"/>
Command的参数(SqlParameterCollection)
public void FillDataEx(string connString, CommandType cmdType,string cmdText,DataSet dataset,string tablename,SqlParameterCollection cmdParms)
{
SqlDataAdapter dsCommand = new SqlDataAdapter();
SqlCommand cmd = new SqlCommand();
dsCommand.SelectCommand = cmd;
dsCommand.TableMappings.Add("Table",tablename);
using (SqlConnection conn = new SqlConnection(connString))
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
dsCommand.Fill(dataset);
}
}
#endregion
internal string constr= null;//= "Uid =sa ;Pwd=sa ;Server = Drago;Database =Northwind";
internal SqlConnection mcn = new SqlConnection();
internal DataSet m_DataSet =new System.Data.DataSet() ;
}
}