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public partial class Business : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string StrSql;
if (!IsPostBack)
{
AreaList.Items.Clear();
//获取医院地区列表;
StrSql = "select AreaName from Area";
DataBase DB = new DataBase();
SqlDataReader DR = DB.RunProcGetReader(StrSql);
AreaList.Items.Add(new ListItem(""));
while (DR.Read())
{
AreaList.Items.Add(new ListItem(DR["AreaName"].ToString()));
}
//绑定医院数据表
StrSql = "select * from Hospital ";
ViewState["SortExpression"] = "Area";//第一次赋值
ViewState["SortDirection"] = "Asc";//第一次赋值
SelectHospital(StrSql, 0);
}
} 执行到这个括号就出错了,之前都没有出错
using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Collections;
namespace MLapp
{
/// <summary>
/// DataBase 的摘要说明。
/// </summary>
public class DataBase
{
private string ConnStr = null;
public DataBase()
{
ConnStr = ConfigurationSettings.AppSettings["dsn"];
//ConnStr = ConfigurationManager.AppSettings["dsn"];
}
public DataBase(string Str)
{
try
{
this.ConnStr = Str;
}
catch(Exception ex)
{
throw ex;
}
}
/// <summary>
/// 返回connection对象
/// </summary>
/// <returns></returns>
public SqlConnection ReturnConn()
{
SqlConnection Conn = new SqlConnection(ConnStr);
Conn.Open();
return Conn;
}
public void Dispose(SqlConnection Conn)
{
if(Conn!=null)
{
Conn.Close();
Conn.Dispose();
}
GC.Collect(); ///控制系统垃圾回收器(一种自动回收未使用内存的服务)。
}
/// <summary>
/// 运行SQL语句
/// </summary>
/// <param name="SQL"></param>
public void RunProc(string SQL)
{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlCommand Cmd ;
Cmd = CreateCmd(SQL, Conn);
try
{
Cmd.ExecuteNonQuery();
}
catch
{
throw new Exception(SQL);
}
Dispose(Conn);
return;
}
/// <summary>
/// 运行SQL语句返回DataReader
/// </summary>
/// <param name="SQL"></param>
/// <returns>SqlDataReader对象.</returns>
public SqlDataReader RunProcGetReader(string SQL)
{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlCommand Cmd ;
Cmd = CreateCmd(SQL, Conn); /// Cmd = nwe SqlCommand(SQL, Conn)
SqlDataReader Dr;
try
{
Dr = Cmd.ExecuteReader(CommandBehavior.Default); ///备忘:此查询可能返回多个结果集。执行查询可能会影响数据库状态。Default 不设置 CommandBehavior 标志,因此调用 ExecuteReader(CommandBehavior.Default) 在功能上等效于调用 ExecuteReader()。
}
catch
{
throw new Exception(SQL);
}
//Dispose(Conn);
//Dispose(Conn); //把注释销掉,看看有什么变化。 会出错,导致阅读器关闭
return Dr;
}
/// <summary>
/// 生成Command对象
/// </summary>
/// <param name="SQL"></param>
/// <param name="Conn"></param>
/// <returns></returns>
public SqlCommand CreateCmd(string SQL, SqlConnection Conn)
{
SqlCommand Cmd ;
Cmd = new SqlCommand(SQL, Conn);
return Cmd;
}
/// <summary>
/// 生成Command对象
/// </summary>
/// <param name="SQL"></param>
/// <returns></returns>
public SqlCommand CreateCmd(string SQL)
{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlCommand Cmd ;
Cmd = new SqlCommand(SQL, Conn);
return Cmd;
}
/// <summary>
/// 返回adapter对象
/// </summary>
/// <param name="SQL"></param>
/// <param name="Conn"></param>
/// <returns></returns>
public SqlDataAdapter CreateDa(string SQL)
{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlDataAdapter Da;
Da = new SqlDataAdapter(SQL, Conn);
return Da;
}
/// <summary>
/// 运行SQL语句,返回DataSet对象
/// </summary>
/// <param name="procName">SQL语句</param>
/// <param name="prams">DataSet对象</param>
public DataSet RunProc(string SQL ,DataSet Ds)
{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlDataAdapter Da;
//Da = CreateDa(SQL, Conn);
Da = new SqlDataAdapter(SQL,Conn);
try
{
Da.Fill(Ds);
}
catch(Exception Err)
{
throw Err;
}
Dispose(Conn); ///数据连接关闭,数据仍然在数据集里边。
return Ds;
}
/// <summary>
/// 运行SQL语句,返回DataSet对象
/// </summary>
/// <param name="procName">SQL语句</param>
/// <param name="prams">DataSet对象</param>
/// <param name="dataReader">表名</param>
public DataSet RunProc(string SQL ,DataSet Ds,string tablename)
{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlDataAdapter Da;
Da = CreateDa(SQL);
try
{
Da.Fill(Ds,tablename);
}
catch(Exception Ex)
{
throw Ex;
}
Dispose(Conn);
return Ds;
}
/// <summary>
/// 运行SQL语句,返回DataSet对象
/// </summary>
/// <param name="procName">SQL语句</param>
/// <param name="prams">DataSet对象</param>
/// <param name="dataReader">表名</param>
public DataSet RunProc(string SQL , DataSet Ds ,int StartIndex ,int PageSize, string tablename )
{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlDataAdapter Da ;
Da = CreateDa(SQL);
try
{
Da.Fill(Ds, StartIndex, PageSize, tablename);
}
catch(Exception Ex)
{
throw Ex;
}
Dispose(Conn);
return Ds;
}
/// <summary>
/// 检验是否存在数据
/// </summary>
/// <returns></returns>
public bool ExistDate(string SQL)
{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlDataReader Dr ;
Dr = CreateCmd(SQL,Conn).ExecuteReader();
if (Dr.Read())
{
Dispose(Conn);
return true;
}
else
{
Dispose(Conn);
return false;
}
}
/// <summary>
/// 返回SQL语句执行结果的第一行第一列
/// </summary>
/// <returns>字符串</returns>
public string ReturnValue(string SQL)
{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
string result;
SqlDataReader Dr ;
try
{
Dr = CreateCmd(SQL,Conn).ExecuteReader();
if (Dr.Read())
{
result = Dr[0].ToString();
Dr.Close();
}
else
{
result = "";
Dr.Close();
}
}
catch
{
throw new Exception(SQL);
}
Dispose(Conn);
return result;
}
/// <summary>
/// 返回SQL语句第一列,第ColumnI列,
/// </summary>
/// <returns>字符串</returns>
public string ReturnValue(string SQL, int ColumnI)
{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
string result;
SqlDataReader Dr ;
try
{
Dr = CreateCmd(SQL,Conn).ExecuteReader();
}
catch
{
throw new Exception(SQL);
}
if (Dr.Read())
{
result = Dr[ColumnI].ToString();
}
else
{
result = "";
}
Dr.Close();
Dispose(Conn);
return result;
}
/// <summary>
/// 生成一个存储过程使用的sqlcommand.
/// </summary>
/// <param name="procName">存储过程名.</param>
/// <param name="prams">存储过程入参数组.</param>
/// <returns>sqlcommand对象.</returns>
public SqlCommand CreateCmd(string procName, SqlParameter[] prams)
{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlCommand Cmd = new SqlCommand(procName, Conn);
Cmd.CommandType = CommandType.StoredProcedure;
if (prams != null)
{
foreach (SqlParameter parameter in prams)
{
if(parameter != null)
{
Cmd.Parameters.Add(parameter);
}
}
}
return Cmd;
}
/// <summary>
/// 为存储过程生成一个SqlCommand对象
/// </summary>
/// <param name="procName">存储过程名</param>
/// <param name="prams">存储过程参数</param>
/// <returns>SqlCommand对象</returns>
private SqlCommand CreateCmd(string procName, SqlParameter[] prams,SqlDataReader Dr)
{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlCommand Cmd = new SqlCommand(procName, Conn);
Cmd.CommandType = CommandType.StoredProcedure;
if (prams != null)
{
foreach (SqlParameter parameter in prams)
Cmd.Parameters.Add(parameter);
}
Cmd.Parameters.Add(
new SqlParameter("ReturnValue", SqlDbType.Int, 4,
ParameterDirection.ReturnValue, false, 0, 0,
string.Empty, DataRowVersion.Default, null));
return Cmd;
}
/// <summary>
/// 运行存储过程,返回.
/// </summary>
/// <param name="procName">存储过程名</param>
/// <param name="prams">存储过程参数</param>
/// <param name="dataReader">SqlDataReader对象</param>
public void RunProc(string procName, SqlParameter[] prams, SqlDataReader Dr)
{
SqlCommand Cmd = CreateCmd(procName, prams, Dr);
Dr = Cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
return;
}
/// <summary>
/// 运行存储过程,返回.
/// </summary>
/// <param name="procName">存储过程名</param>
/// <param name="prams">存储过程参数</param>
public string RunProc(string procName, SqlParameter[] prams)
{
SqlDataReader Dr;
SqlCommand Cmd = CreateCmd(procName, prams);
Dr = Cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
if(Dr.Read())
{
return Dr.GetValue(0).ToString();
}
else
{
return "";
}
}
/// <summary>
/// 运行存储过程,返回dataset.
/// </summary>
/// <param name="procName">存储过程名.</param>
/// <param name="prams">存储过程入参数组.</param>
/// <returns>dataset对象.</returns>
public DataSet RunProc(string procName,SqlParameter[] prams,DataSet Ds)
{
SqlCommand Cmd = CreateCmd(procName,prams);
SqlDataAdapter Da = new SqlDataAdapter(Cmd);
try
{
Da.Fill(Ds);
}
catch(Exception Ex)
{
throw Ex;
}
return Ds;
}
}
}
//绑定医院数据表
StrSql = "select * from Hospital ";
ViewState["SortExpression"] = "Area";//第一次赋值
ViewState["SortDirection"] = "Asc";//第一次赋值
SelectHospital(StrSql, 0);
}
} 执行到这个括号就出错了,之前都没有出错