.NET2.0学习笔记之--在线投票系统

类ASPNET2System.cs代码如下:

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

/// <summary>
/// ASPNET2System 的摘要说明
/// </summary>
public class ASPNET2System
{
public static string PROJECTNAME = "WebVote";
public static string PROJECTDESN = "网络在线投票系统";
public static string PROJECTTREEROOTNODEDATA = "0";

public static string OPERATIONADDSUCCESSMESSAGE = "添加数据项成功！！！";
public static string OPERATIONADDFAILUREMESSAGE = "添加数据项失败！！！";

public static string OPERATIONUPDATESUCCESSMESSAGE = "修改数据项成功！！！";
public static string OPERATIONUPDATEFAILUREMESSAGE = "修改数据项失败！！！";

public static string OPERATIONDELETESUCCESSMESSAGE = "删除数据项成功！！！";
public static string OPERATIONDELETEFAILUREMESSAGE = "删除数据项失败！！！";

public static string OPERATIONNOSELECTMESSAGE = "请选择操作的数据项！！！";
public static string OPERATIONDELETEMESSAGE = "你确定要删除所选择的数据项吗？";
public static string PasswordErrorMESSAGE = "旧密码输入错误，请重新输入密码！！！";

public static string OPERATIONDATANULL = "数据为空！！！";
public static string OPERATIONCHILADRENDATANOTNULL = "选择结点的孩子不为空！！！";
public static string OPERATIONATTACHMENTDATA = "该文档包含附件，请先删除附件！！！";
public static string OPERATIONPICTUREDATA = "该文档包含图片，请先删除图片！！！";
public static string OPERATIONATTACHMENTPICTUREDATA = "该文档包含附件和图片，请先删除附件和图片！！！";

/// <summary>
/// ListBox控件的错误信息
/// </summary>
public static string LISTBOX_NO_SELECT_ITEM = "请选择操作的数据项！";

public static string RedirectErrorUrl(String sErrorUrl)
{
if (sErrorUrl == null || sErrorUrl == "")
{
return ("");
}
return ((sErrorUrl.IndexOf("?") > -1) ? sErrorUrl.Substring(0, sErrorUrl.IndexOf("?")) : sErrorUrl);
}

public static void SetListBoxItem(ListBox listBox, string sItemValue)
{
int index = 0;
foreach (ListItem item in listBox.Items)
{
///判断值是否相等，并且设置控件的SelectedIndex
if (item.Value.ToLower() == sItemValue.ToLower())
{
listBox.SelectedIndex = index;
break;
}
index++;
}
}

public static void SetListBoxItem(DropDownList listBox, string sItemValue)
{
int index = 0;
foreach (ListItem item in listBox.Items)
{
///判断值是否相等，并且设置控件的SelectedIndex
if (item.Value.ToLower() == sItemValue.ToLower())
{
listBox.SelectedIndex = index;
break;
}
index++;
}
}

public static bool IsExistItem(ListBox listBox, string sItemValue)
{
foreach (ListItem item in listBox.Items)
{
if (item.Text.ToLower() == sItemValue.ToLower())
{
return true;
}
}
return false;
}
}
类SQLHelper.cs代码如下

using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.ComponentModel;

namespace SQLHelper
{
/// <summary>
/// SQLHelper类封装对SQL Server数据库的添加、删除、修改和选择等操作
/// </summary>
public class SQLHelper
{
/// 连接数据源
private SqlConnection myConnection = null;
private readonly string RETURNVALUE = "RETURNVALUE";

/// <summary>
/// 打开数据库连接.
/// </summary>
private void Open()
{
// 打开数据库连接
if (myConnection == null)
{
myConnection = new SqlConnection(ConfigurationSettings.AppSettings["SQLCONNECTIONSTRING"].ToString());
}
if(myConnection.State == ConnectionState.Closed)
{
try
{
///打开数据库连接
myConnection.Open();
}
catch(Exception ex)
{
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭已经打开的数据库连接
}
}
}

/// <summary>
/// 关闭数据库连接
/// </summary>
public void Close()
{
///判断连接是否已经创建
if(myConnection != null)
{
///判断连接的状态是否打开
if(myConnection.State == ConnectionState.Open)
{
myConnection.Close();
}
}
}

/// <summary>
/// 释放资源
/// </summary>
public void Dispose()
{
// 确认连接是否已经关闭
if (myConnection != null)
{
myConnection.Dispose();
myConnection = null;
}
}

/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <returns>返回存储过程返回值</returns>
public int RunProc(string procName)
{
SqlCommand cmd = CreateProcCommand(procName, null);
try
{
///执行存储过程
cmd.ExecuteNonQuery();
}
catch(Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}

///返回存储过程的参数值
return (int)cmd.Parameters[RETURNVALUE].Value;
}

/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <returns>返回存储过程返回值</returns>
public int RunProc(string procName, SqlParameter[] prams)
{
SqlCommand cmd = CreateProcCommand(procName, prams);
try
{
///执行存储过程
cmd.ExecuteNonQuery();
}
catch(Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}

///返回存储过程的参数值
return (int)cmd.Parameters[RETURNVALUE].Value;
}

/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="dataReader">返回存储过程返回值</param>
public void RunProc(string procName, out SqlDataReader dataReader)
{
///创建Command
SqlCommand cmd = CreateProcCommand(procName, null);

try
{
///读取数据
dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch(Exception ex)
{
dataReader = null;
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
}

/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <param name="dataSet">返回DataReader对象</param>
public void RunProc(string procName, SqlParameter[] prams, out SqlDataReader dataReader)
{
///创建Command
SqlCommand cmd = CreateProcCommand(procName, prams);

try
{
///读取数据
dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch(Exception ex)
{
dataReader = null;
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
}

/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="dataSet">返回DataSet对象</param>
public void RunProc(string procName, ref DataSet dataSet)
{
if(dataSet == null)
{
dataSet = new DataSet();
}
///创建SqlDataAdapter
SqlDataAdapter da = CreateProcDataAdapter(procName,null);

try
{
///读取数据
da.Fill(dataSet);
}
catch(Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}
}

/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <param name="dataSet">返回DataSet对象</param>
public void RunProc(string procName, SqlParameter[] prams,ref DataSet dataSet)
{
if(dataSet == null)
{
dataSet = new DataSet();
}
///创建SqlDataAdapter
SqlDataAdapter da = CreateProcDataAdapter(procName,prams);

try
{
///读取数据
da.Fill(dataSet);
}
catch(Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}
}

/// <summary>
/// 执行SQL语句
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <returns>返回值</returns>
public int RunSQL(string cmdText)
{
SqlCommand cmd = CreateSQLCommand(cmdText, null);
try
{
///执行存储过程
cmd.ExecuteNonQuery();
}
catch(Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}

///返回存储过程的参数值
return (int)cmd.Parameters[RETURNVALUE].Value;
}

/// <summary>
/// 执行SQL语句
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <param name="prams">SQL语句所需参数</param>
/// <returns>返回值</returns>
public int RunSQL(string cmdText, SqlParameter[] prams)
{
SqlCommand cmd = CreateSQLCommand(cmdText,prams);
try
{
///执行存储过程
cmd.ExecuteNonQuery();
}
catch(Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}

///返回存储过程的参数值
return (int)cmd.Parameters[RETURNVALUE].Value;
}

/// <summary>
/// 执行SQL语句
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <param name="dataReader">返回DataReader对象</param>
public void RunSQL(string cmdText, out SqlDataReader dataReader)
{
///创建Command
SqlCommand cmd = CreateSQLCommand(cmdText, null);

try
{
///读取数据
dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch(Exception ex)
{
dataReader = null;
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
}

/// <summary>
/// 执行SQL语句
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <param name="prams">SQL语句所需参数</param>
/// <param name="dataReader">返回DataReader对象</param>
public void RunSQL(string cmdText, SqlParameter[] prams, out SqlDataReader dataReader)
{
///创建Command
SqlCommand cmd = CreateSQLCommand(cmdText, prams);

try
{
///读取数据
dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch(Exception ex)
{
dataReader = null;
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
}

/// <summary>
/// 执行SQL语句
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <param name="dataSet">返回DataSet对象</param>
public void RunSQL(string cmdText, ref DataSet dataSet)
{
if(dataSet == null)
{
dataSet = new DataSet();
}
///创建SqlDataAdapter
SqlDataAdapter da = CreateSQLDataAdapter(cmdText,null);

try
{
///读取数据
da.Fill(dataSet);
}
catch(Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}
}

/// <summary>
/// 执行SQL语句
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <param name="prams">SQL语句所需参数</param>
/// <param name="dataSet">返回DataSet对象</param>
public void RunSQL(string cmdText, SqlParameter[] prams,ref DataSet dataSet)
{
if(dataSet == null)
{
dataSet = new DataSet();
}
///创建SqlDataAdapter
SqlDataAdapter da = CreateProcDataAdapter(cmdText,prams);

try
{
///读取数据
da.Fill(dataSet);
}
catch(Exception ex)
{
///记录错误日志
SystemError.CreateErrorLog(ex.Message);
}
finally
{
///关闭数据库的连接
Close();
}
}

/// <summary>
/// 创建一个SqlCommand对象以此来执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <returns>返回SqlCommand对象</returns>
private SqlCommand CreateProcCommand(string procName, SqlParameter[] prams)
{
///打开数据库连接
Open();

///设置Command
SqlCommand cmd = new SqlCommand(procName, myConnection);
cmd.CommandType = CommandType.StoredProcedure;

///添加把存储过程的参数
if (prams != null)
{
foreach (SqlParameter parameter in prams)
{
cmd.Parameters.Add(parameter);
}
}

///添加返回参数ReturnValue
cmd.Parameters.Add(
new SqlParameter(RETURNVALUE, SqlDbType.Int,4,ParameterDirection.ReturnValue,
false,0,0,string.Empty, DataRowVersion.Default,null));

///返回创建的SqlCommand对象
return cmd;
}

/// <summary>
/// 创建一个SqlCommand对象以此来执行存储过程
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <param name="prams">SQL语句所需参数</param>
/// <returns>返回SqlCommand对象</returns>
private SqlCommand CreateSQLCommand(string cmdText, SqlParameter[] prams)
{
///打开数据库连接
Open();

///设置Command
SqlCommand cmd = new SqlCommand(cmdText,myConnection);

///添加把存储过程的参数
if (prams != null)
{
foreach (SqlParameter parameter in prams)
{
cmd.Parameters.Add(parameter);
}
}

///添加返回参数ReturnValue
cmd.Parameters.Add(
new SqlParameter(RETURNVALUE, SqlDbType.Int,4,ParameterDirection.ReturnValue,
false,0,0,string.Empty, DataRowVersion.Default,null));

///返回创建的SqlCommand对象
return cmd;
}

/// <summary>
/// 创建一个SqlDataAdapter对象，用此来执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <returns>返回SqlDataAdapter对象</returns>
private SqlDataAdapter CreateProcDataAdapter(string procName,SqlParameter[] prams)
{
///打开数据库连接
Open();

///设置SqlDataAdapter对象
SqlDataAdapter da = new SqlDataAdapter(procName,myConnection);
da.SelectCommand.CommandType = CommandType.StoredProcedure;

///添加把存储过程的参数
if (prams != null)
{
foreach (SqlParameter parameter in prams)
{
da.SelectCommand.Parameters.Add(parameter);
}
}

///添加返回参数ReturnValue
da.SelectCommand.Parameters.Add(
new SqlParameter(RETURNVALUE, SqlDbType.Int,4,ParameterDirection.ReturnValue,
false,0,0,string.Empty, DataRowVersion.Default,null));

///返回创建的SqlDataAdapter对象
return da;
}

/// <summary>
/// 创建一个SqlDataAdapter对象，用此来执行SQL语句
/// </summary>
/// <param name="cmdText">SQL语句</param>
/// <param name="prams">SQL语句所需参数</param>
/// <returns>返回SqlDataAdapter对象</returns>
private SqlDataAdapter CreateSQLDataAdapter(string cmdText,SqlParameter[] prams)
{
///打开数据库连接
Open();

///设置SqlDataAdapter对象
SqlDataAdapter da = new SqlDataAdapter(cmdText,myConnection);

///添加把存储过程的参数
if (prams != null)
{
foreach (SqlParameter parameter in prams)
{
da.SelectCommand.Parameters.Add(parameter);
}
}

///添加返回参数ReturnValue
da.SelectCommand.Parameters.Add(
new SqlParameter(RETURNVALUE, SqlDbType.Int,4,ParameterDirection.ReturnValue,
false,0,0,string.Empty, DataRowVersion.Default,null));

///返回创建的SqlDataAdapter对象
return da;
}

/// <summary>
/// 生成存储过程参数
/// </summary>
/// <param name="ParamName">存储过程名称</param>
/// <param name="DbType">参数类型</param>
/// <param name="Size">参数大小</param>
/// <param name="Direction">参数方向</param>
/// <param name="Value">参数值</param>
/// <returns>新的 parameter 对象</returns>
public SqlParameter CreateParam(string ParamName, SqlDbType DbType, Int32 Size, ParameterDirection Direction, object Value)
{
SqlParameter param;

///当参数大小为0时，不使用该参数大小值
if(Size > 0)
{
param = new SqlParameter(ParamName, DbType, Size);
}
else
{
///当参数大小为0时，不使用该参数大小值
param = new SqlParameter(ParamName, DbType);
}

///创建输出类型的参数
param.Direction = Direction;
if (!(Direction == ParameterDirection.Output && Value == null))
{
param.Value = Value;
}

///返回创建的参数
return param;
}

/// <summary>
/// 传入输入参数
/// </summary>
/// <param name="ParamName">存储过程名称</param>
/// <param name="DbType">参数类型</param></param>
/// <param name="Size">参数大小</param>
/// <param name="Value">参数值</param>
/// <returns>新的parameter 对象</returns>
public SqlParameter CreateInParam(string ParamName, SqlDbType DbType, int Size, object Value)
{
return CreateParam(ParamName, DbType, Size, ParameterDirection.Input, Value);
}

/// <summary>
/// 传入返回值参数
/// </summary>
/// <param name="ParamName">存储过程名称</param>
/// <param name="DbType">参数类型</param>
/// <param name="Size">参数大小</param>
/// <returns>新的 parameter 对象</returns>
public SqlParameter CreateOutParam(string ParamName, SqlDbType DbType, int Size)
{
return CreateParam(ParamName, DbType, Size, ParameterDirection.Output, null);
}

/// <summary>
/// 传入返回值参数
/// </summary>
/// <param name="ParamName">存储过程名称</param>
/// <param name="DbType">参数类型</param>
/// <param name="Size">参数大小</param>
/// <returns>新的 parameter 对象</returns>
public SqlParameter CreateReturnParam(string ParamName, SqlDbType DbType, int Size)
{
return CreateParam(ParamName, DbType, Size, ParameterDirection.ReturnValue, null);
}
}
}

类SystemError.cs代码如下:
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
/// <summary>
/// SystemError 的摘要说明
/// </summary>
public class SystemError
{
public static string _fileName = "f://Systemlog.txt";
public static String FileName
{
get { return (_fileName); }
set { if (value != null || value != "") { _fileName = value; } }
}
public static void CreateErrorLog(string message)
{
if(File.Exists(FileName))
{
/**////如果日志文件已经存在，则直接写入日志文件
StreamWriter sr = File.AppendText(FileName);
sr.WriteLine ("/n");
sr.WriteLine (DateTime.Now.ToString()+message);
sr.Close();
}
else
{
/**////创建日志文件
StreamWriter sr = File.CreateText(FileName);
sr.Close();
}
}
public SystemError()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
}