//////////////数据访问类
using System;
using System.ComponentModel;
using System.Collections;
using System.Web.Security;
using System.Diagnostics;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Text.RegularExpressions;
namespace WebApp.Components
{
/// <summary>
/// 通用的数据库处理类，通过ado.net与数据库连接
/// </summary>
public class Database : IDisposable
{
// 连接数据源
private SqlConnection con;
#region 执行不带参数的存储过程，返回存储过程返回值
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">不带参数的存储过程的名称</param>
/// <returns>返回存储过程返回值</returns>
public int RunProc(string procName)
{
SqlCommand cmd = CreateCommand(procName, null);
cmd.ExecuteNonQuery();
this.Close();
return (int)cmd.Parameters["ReturnValue"].Value;
}
#endregion
#region 执行带参数的存储过程，返回存储过程返回值
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">带参数存储过程名称</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 = CreateCommand(procName,prams);
cmd.ExecuteNonQuery();
this.Close();
return (int)cmd.Parameters["ReturnValue"].Value;
}
#endregion
#region 执行不带参数的存储过程，通过输出参数返回SqlDataReader对象
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">不带参数的存储过程的名称</param>
/// <param name="dataReader">通过输出参数返回SqlDataReader对象</param>
public void RunProc(string procName, out SqlDataReader dataReader)
{
SqlCommand cmd = CreateCommand(procName, null);
dataReader = cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
}
#endregion
#region 执行带参数的存储过程，通过输出参数返回SqlDataReader对象
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">带参数的存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <param name="dataReader">通过输出参数返回SqlDataReader对象</param>
public void RunProc(string procName, SqlParameter[] prams, out SqlDataReader dataReader)
{
SqlCommand cmd = CreateCommand(procName, prams);
dataReader = cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
}
#endregion
#region 创建SqlCommand对象
/// <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 CreateCommand(string procName, SqlParameter[] prams)
{
// 确认打开连接
Open();
SqlCommand cmd = new SqlCommand(procName, con);
cmd.CommandType = CommandType.StoredProcedure;
// 依次把参数传入存储过程
if (prams != null)
{
foreach (SqlParameter parameter in prams)
cmd.Parameters.Add(parameter);
}
// 加入返回参数
cmd.Parameters.Add(
new SqlParameter("ReturnValue", SqlDbType.Int, 4,
ParameterDirection.ReturnValue, false, 0, 0,
string.Empty, DataRowVersion.Default, null));
return cmd;
}
#endregion
#region 打开数据库连接
/// <summary>
/// 打开数据库连接.
/// </summary>
private void Open()
{
// 打开数据库连接
if (con == null)
{
con = new SqlConnection(ConfigurationManager.AppSettings["ConnectionString"]);
}
if(con.State == System.Data.ConnectionState.Closed)
con.Open();
}
#endregion
#region 关闭数据库连接
/// <summary>
/// 关闭数据库连接
/// </summary>
public void Close()
{
if (con != null)
con.Close();
}
#endregion
#region 释放资源
/// <summary>
/// 释放资源
/// </summary>
public void Dispose()
{
// 确认连接是否已经关闭
if (con != null)
{
con.Dispose();
con = null;
}
}
#endregion
#region 传入输入参数
/// <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 name="Size">参数大小</param>
/// <param name="Value">参数值</param>
/// <returns>新的 parameter 对象</returns>
public SqlParameter MakeInParam(string ParamName, SqlDbType DbType, int Size, object Value)
{
return MakeParam(ParamName, DbType, Size, ParameterDirection.Input, Value);
}
#endregion
#region 传入输出参数
/// <summary>
/// 传入输出参数
/// </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 MakeOutParam(string ParamName, SqlDbType DbType, int Size)
{
return MakeParam(ParamName, DbType, Size, ParameterDirection.Output, null);
}
#endregion
#region 传入返回值参数
/// <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 MakeReturnParam(string ParamName, SqlDbType DbType, int Size)
{
return MakeParam(ParamName, DbType, Size, ParameterDirection.ReturnValue, null);
}
#endregion
#region 生成存储过程参数
/// <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 MakeParam(string ParamName, SqlDbType DbType, Int32 Size, ParameterDirection Direction, object Value)
{
SqlParameter param;
if(Size > 0)
param = new SqlParameter(ParamName, DbType, Size);
else
param = new SqlParameter(ParamName, DbType);
param.Direction = Direction;
if (!(Direction == ParameterDirection.Output && Value == null))
param.Value = Value;
return param;
}
#endregion
#region 将DataReader 转为 DataTable
/// <summary>
/// 将DataReader 转为 DataTable
/// </summary>
/// <param name="DataReader">DataReader</param>
public static DataTable ConvertDataReaderToDataTable(SqlDataReader reader)
{
try
{
DataTable objDataTable = new DataTable();
int intFieldCount = reader.FieldCount;
for (int intCounter = 0; intCounter < intFieldCount; ++intCounter)
{
objDataTable.Columns.Add(reader.GetName(intCounter), reader.GetFieldType(intCounter));
}
objDataTable.BeginLoadData();
object[] objValues = new object[intFieldCount];
while (reader.Read())
{
reader.GetValues(objValues);
objDataTable.LoadDataRow(objValues, true);
}
reader.Close();
objDataTable.EndLoadData();
return objDataTable;
}
catch(Exception ex)
{
throw new Exception("转换DataReader为DataTable出错!",ex);
}
}
#endregion
#region 数字判定
/// <summary>
/// 数字判定
/// </summary>
/// <param name="str">字符串参数</param>
public static bool IsNumber(String strNumber)
{
Regex objNotNumberPattern = new Regex("[^0-9.-]");
Regex objTwoDotPattern = new Regex("[0-9]*[.][0-9]*[.][0-9]*");
Regex objTwoMinusPattern = new Regex("[0-9]*[-][0-9]*[-][0-9]*");
String strValidRealPattern = "^([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]+$";
String strValidIntegerPattern = "^([-]|[0-9])[0-9]*$";
Regex objNumberPattern = new Regex("(" + strValidRealPattern + ")|(" + strValidIntegerPattern + ")");
return !objNotNumberPattern.IsMatch(strNumber) &&
!objTwoDotPattern.IsMatch(strNumber) &&
!objTwoMinusPattern.IsMatch(strNumber) &&
objNumberPattern.IsMatch(strNumber);
}
#endregion
}
}
///////////使用
SqlDataReader dataReader = null;
Database data = new Database();
SqlParameter[] prams = {
data.MakeInParam("@LinkID",SqlDbType.Int, 4, LinkID),
};
try
{
data.RunProc("存储过程", prams, out dataReader);
return dataReader;
}
catch (Exception ex)
{
throw new Exception("友情链接读取出错!", ex);
}
//这些是关于数据访问的部分代码，关于存储过程，分三种：无返回查询，返回数据集，返回单值
