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using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.OleDb;
using NGuestBook.IDAL;
using NGuestBook.Entity;
namespace NGuestBook.AccessDAL
{
public class AdminDAL : IAdminDAL
{
/**//// <summary>
/// 插入管理員
/// </summary>
/// <param name="admin">管理員實(shí)體類</param>
/// <returns>是否成功</returns>
public bool Insert(AdminInfo admin)
{
string SQLCommand = "insert into [TAdmin]([Name],[Password]) values(@name,@password)";
OleDbParameter[] parameters ={
new OleDbParameter("name",admin.Name),
new OleDbParameter("password",admin.Password)
};
try
{
AccessDALHelper.ExecuteSQLNonQuery(SQLCommand, parameters);
return true;
}
catch
{
return false;
}
}
/**//// <summary>
/// 刪除管理員
/// </summary>
/// <param name="id">欲刪除的管理員的ID</param>
/// <returns>是否成功</returns>
public bool Delete(int id)
{
string SQLCommand = "delete from [TAdmin] where [ID]=@id";
OleDbParameter[] parameters ={
new OleDbParameter("id",id)
};
try
{
AccessDALHelper.ExecuteSQLNonQuery(SQLCommand, parameters);
return true;
}
catch
{
return false;
}
}
/**//// <summary>
/// 更新管理員信息
/// </summary>
/// <param name="admin">管理員實(shí)體類</param>
/// <returns>是否成功</returns>
public bool Update(AdminInfo admin)
{
string SQLCommand = "update [TAdmin] set [Name]=@name,[Password]=@password where [ID]=@id";
OleDbParameter[] parameters ={
new OleDbParameter("id",admin.ID),
new OleDbParameter("name",admin.Name),
new OleDbParameter("password",admin.Password)
};
try
{
AccessDALHelper.ExecuteSQLNonQuery(SQLCommand, parameters);
return true;
}
catch
{
return false;
}
}
/**//// <summary>
/// 按ID取得管理員信息
/// </summary>
/// <param name="id">管理員ID</param>
/// <returns>管理員實(shí)體類</returns>
public AdminInfo GetByID(int id)
{
string SQLCommand = "select * from [TAdmin] where [ID]=@id";
OleDbParameter[] parameters ={
new OleDbParameter("id",id)
};
try
{
OleDbDataReader dataReader = AccessDALHelper.ExecuteSQLDataReader(SQLCommand, parameters);
if (!dataReader.HasRows)
{
throw new Exception();
}
AdminInfo admin = new AdminInfo();
dataReader.Read();
admin.ID=(int)dataReader["ID"];
admin.Name=(string)dataReader["Name"];
admin.Password=(string)dataReader["Password"];
return admin;
}
catch
{
return null;
}
}
/**//// <summary>
/// 按用戶名及密碼取得管理員信息
/// </summary>
/// <param name="name">用戶名</param>
/// <param name="password">密碼</param>
/// <returns>管理員實(shí)體類，不存在時(shí)返回null</returns>
public AdminInfo GetByNameAndPassword(string name, string password)
{
string SQLCommand = "select * from [TAdmin] where [Name]=@name and [Password]=@password";
OleDbParameter[] parameters ={
new OleDbParameter("name",name),
new OleDbParameter("password",password),
};
try
{
OleDbDataReader dataReader = AccessDALHelper.ExecuteSQLDataReader(SQLCommand, parameters);
if (!dataReader.HasRows)
{
throw new Exception();
}
AdminInfo admin = new AdminInfo();
dataReader.Read();
admin.ID = (int)dataReader["ID"];
admin.Name = (string)dataReader["Name"];
admin.Password = (string)dataReader["Password"];
return admin;
}
catch
{
return null;
}
}
/**//// <summary>
/// 按管理員名取得管理員信息
/// </summary>
/// <param name="name">管理員名</param>
/// <returns>管理員實(shí)體類</returns>
public AdminInfo GetByName(string name)
{
string SQLCommand = "select * from [TAdmin] where [Name]=@name";
OleDbParameter[] parameters ={
new OleDbParameter("name",name),
};
try
{
OleDbDataReader dataReader = AccessDALHelper.ExecuteSQLDataReader(SQLCommand, parameters);
if (!dataReader.HasRows)
{
throw new Exception();
}
AdminInfo admin = new AdminInfo();
dataReader.Read();
admin.ID = (int)dataReader["ID"];
admin.Name = (string)dataReader["Name"];
admin.Password = (string)dataReader["Password"];
return admin;
}
catch
{
return null;
}
}
/**//// <summary>
/// 取得全部管理員信息
/// </summary>
/// <returns>管理員實(shí)體類集合</returns>
public IList<AdminInfo> GetAll()
{
string SQLCommand = "select * from [TAdmin]";
try
{
OleDbDataReader dataReader = AccessDALHelper.ExecuteSQLDataReader(SQLCommand, null);
if (!dataReader.HasRows)
{
throw new Exception();
}
IList<AdminInfo> adminCollection = new List<AdminInfo>();
int i = 0;
while (dataReader.Read())
{
AdminInfo admin = new AdminInfo();
admin.ID = (int)dataReader["ID"];
admin.Name = (string)dataReader["Name"];
admin.Password = (string)dataReader["Password"];
adminCollection.Add(admin);
i ;
}
return adminCollection;
}
catch
{
return null;
}
}
}
}
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