无法找到表0
#define DEBUG
using System;
using System.ComponentModel;
using System.Collections;
using System.Diagnostics;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using HRManager.DataAccessHelper;
using HRManager.CommonComponent;
namespace HRManager.DataAccessLayer
{
/// <summary>
/// 类,用于数据访问的类。
/// </summary>
public class Database : IDisposable
{
/// <summary>
/// 保护变量,数据库连接。
/// </summary>
protected SqlConnection Connection;
/// <summary>
/// 保护变量,数据库连接串。
/// </summary>
protected String ConnectionString;
/// <summary>
/// 构造函数。
/// </summary>
/// <param name="DatabaseConnectionString">数据库连接串</param>
public Database()
{
ConnectionString = ConfigurationManager.AppSettings["DBConnectionString"];
}
/// <summary>
/// 析构函数,释放非托管资源
/// </summary>
~Database()
{
try
{
if (Connection != null)
Connection.Close();
}
catch(Exception e)
{
myEventLog.Log.Debug(e.Message);
}
try
{
Dispose();
}
catch{}
}
/// <summary>
/// 保护方法,打开数据库连接。
/// </summary>
protected void Open()
{
if (Connection == null)
{
try
{
Connection = new SqlConnection(ConnectionString);
}
catch(Exception e)
{
myEventLog.Log.Debug(e.Message);
}
}
if (Connection.State.Equals(ConnectionState.Closed))
{
try
{
Connection.Open();
}
catch(Exception e)
{
myEventLog.Log.Debug(e.Message);
}
}
}
/// <summary>
/// 公有方法,关闭数据库连接。
/// </summary>
public void Close()
{
try
{
if (Connection != null)
Connection.Close();
}
catch(Exception e)
{
myEventLog.Log.Debug(e.Message);
}
}
/// <summary>
/// 公有方法,释放资源。
/// </summary>
public void Dispose()
{
// 确保连接被关闭
try
{
if (Connection != null)
{
Connection.Dispose();
Connection = null;
}
}
catch(Exception e)
{
myEventLog.Log.Debug(e.Message);
}
}
/// <summary>
/// 公有方法,获取数据,返回一个SqlDataReader (调用后主意调用SqlDataReader.Close())。
/// </summary>
/// <param name="SqlString">Sql语句</param>
/// <returns>SqlDataReader</returns>
public SqlDataReader GetDataReader(String SqlString)
{
Open();
try
{
SqlCommand cmd = new SqlCommand(SqlString,Connection);
return cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
#if DEBUG
myEventLog.Log.Info(SqlString);
#endif
}
catch(Exception e)
{
myEventLog.Log.Debug("数据查询(GetDataReader)失败,SqlString=" + SqlString + ",系统异常信息:" + e.Message);
return null;
}
}
/// <summary>
/// 公有方法,获取数据,返回一个DataSet。
/// </summary>
/// <param name="SqlString">Sql语句</param>
/// <returns>DataSet</returns>
public DataSet GetDataSet(String SqlString)
{
DataSet dataset = new DataSet();
Open();
try
{
SqlDataAdapter adapter = new SqlDataAdapter(SqlString,Connection);
adapter.Fill(dataset);
#if DEBUG
myEventLog.Log.Info(SqlString);
#endif
}
catch(Exception e)
{
myEventLog.Log.Debug("数据查询(GetDataSet)失败,SqlString=" + SqlString + ",系统异常信息:" + e.Message);
}
finally
{
Close();
}
return dataset;
}
/// <summary>
/// 公有方法,获取数据,返回一个DataTable。
/// </summary>
/// <param name="SqlString">Sql语句</param>
/// <returns>DataTable</returns>
public DataTable GetDataTable(String SqlString)
{
DataSet dataset = GetDataSet(SqlString);
dataset.CaseSensitive = false;
return dataset.Tables[0];
}
/// <summary>
/// 公有方法,获取数据,返回一个DataRow。
/// </summary>
/// <param name="SqlString">Sql语句</param>
/// <returns>DataRow</returns>
public DataRow GetDataRow(String SqlString)
{
DataSet dataset = GetDataSet(SqlString);
dataset.CaseSensitive = false;
if (dataset.Tables[0].Rows.Count>0)
{
return dataset.Tables[0].Rows[0];
}
else
{
return null;
}
}
/// <summary>
/// 公有方法,执行Sql语句。
/// </summary>
/// <param name="SqlString">Sql语句</param>
/// <returns>对Update、Insert、Delete为影响到的行数,其他情况为-1</returns>
public int ExecuteSQL(String SqlString)
{
int count = -1;
Open();
try
{
SqlCommand cmd = new SqlCommand(SqlString,Connection);
count = cmd.ExecuteNonQuery();
#if DEBUG
myEventLog.Log.Info(SqlString);
#endif
}
catch(Exception e)
{
myEventLog.Log.Debug("执行数据操作(ExecuteSQL)失败,SqlString=" + SqlString + ",系统异常信息:" + e.Message);
count = -1;
}
finally
{
Close();
}
return count;
}
/// <summary>
/// 公有方法,执行一组Sql语句。
/// </summary>
/// <param name="SqlStrings">Sql语句组</param>
/// <returns>是否成功</returns>
public bool ExecuteSQL(String[] SqlStrings)
{
bool success = true;
Open();
SqlCommand cmd = new SqlCommand();
SqlTransaction trans = Connection.BeginTransaction();
cmd.Connection = Connection;
cmd.Transaction = trans;
int i=0;
try
{
foreach (String str in SqlStrings)
{
cmd.CommandText = str;
cmd.ExecuteNonQuery();
i++;
#if DEBUG
myEventLog.Log.Info(str);
#endif
}
trans.Commit();
}
catch(Exception e)
{
myEventLog.Log.Debug("执行数据操作(ExecuteSQL)失败,SqlString=" + SqlStrings[i] + ",系统异常信息:" + e.Message);
success = false;
trans.Rollback();
}
finally
{
Close();
}
return success;
}
/// <summary>
/// 公有方法,在一个数据表中插入一条记录。
/// </summary>
/// <param name="TableName">表名</param>
/// <param name="Cols">哈西表,键值为字段名,值为字段值</param>
/// <returns>是否成功</returns>
public bool Insert(String TableName,Hashtable Cols)
{
int Count = 0;
if (Cols.Count<=0)
{
return true;
}
String Fields = " (";
String Values = " Values(";
foreach(DictionaryEntry item in Cols)
{
if (Count!=0)
{
Fields += ",";
Values += ",";
}
Fields += "["+item.Key.ToString()+"]";
Values += item.Value.ToString();
Count ++;
}
Fields += ")";
Values += ")";
String SqlString = "Insert into "+TableName+Fields+Values;
String[] Sqls = {SqlString};
return ExecuteSQL(Sqls);
}
/// <summary>
/// 公有方法,更新一个数据表。
/// </summary>
/// <param name="TableName">表名</param>
/// <param name="Cols">哈西表,键值为字段名,值为字段值</param>
/// <param name="Where">Where子句</param>
/// <returns>是否成功</returns>
public bool Update(String TableName,Hashtable Cols,String Where)
{
int Count = 0;
if (Cols.Count<=0)
{
return true;
}
String Fields = " ";
foreach(DictionaryEntry item in Cols)
{
if (Count!=0)
{
Fields += ",";
}
Fields += "["+item.Key.ToString()+"]";
Fields += "=";
Fields += item.Value.ToString();
Count ++;
}
Fields += " ";
String SqlString = "Update "+TableName+" Set "+Fields+Where;
String[] Sqls = {SqlString};
return ExecuteSQL(Sqls);
}
}
}
vs2005 提示红色标记处错误,该如何解决?