本文实例讲述了ASP.NET数据库操作类。分享给大家供大家参考,具体如下:
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.Data.SqlClient;
namespace Mysqlserver{
/// <summary> /// SqlServerDataBase 的摘要说明 /// </summary> public class SqlServerDataBase {
private string strError = null;
private int intCount = 0;
public SqlServerDataBase() {
// // TODO: 在此处添加构造函数逻辑 // }
/// <summary> /// 公开方法DBConn,返回数据库连接 /// </summary> /// <returns></returns> public SqlConnection DBconn() {
string strConn = "Server=(local);
Database=GlobalMeetings;
Uid=sa;
pwd=";
try {
return new SqlConnection(strConn);
}
catch (Exception) {
return null;
}
}
/// <summary> /// 公开属性ErrorMessage,返回错误信息 /// </summary> public string ErrorMessage {
get {
return strError;
}
}
/// <summary> /// 根据查询语句从数据库检索数据 /// </summary> /// <param name="strSelect">查询语句</param> /// <param name="SqlConn">数据库连接</param> /// <returns>有数据则返回DataSet对象,否则返回null</returns> public DataSet Select(string SelectString, SqlConnection sqlConn) {
strError = "";
SqlConnection conn;
if (sqlConn == null) {
conn = DBconn();
}
else {
conn = sqlConn;
}
try {
//若数据库连接的当前状态是关闭的,则打开连接 if (conn.State == ConnectionState.Closed) {
conn.Open();
}
SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
SqlCommand selectCommand = new SqlCommand(SelectString, conn);
selectCommand.CommandType = CommandType.Text;
mySqlDataAdapter.SelectCommand = selectCommand;
DataSet myDS = new DataSet();
mySqlDataAdapter.Fill(myDS);
return myDS;
}
catch (Exception e) {
strError = "数据检索失败:" + e.Message;
return null;
}
finally {
if (conn.State != ConnectionState.Closed) {
conn.Close();
}
}
}
/// <summary> /// 更新数据库 /// </summary> /// <param name="UpdateString">Update Sql语句</param> /// <param name="SqlConn">数据库连接</param> /// <returns>更新成功返回true</returns> public bool Update(string UpdateString, SqlConnection SqlConn) {
return udiDataBase(UpdateString, SqlConn);
}
/// <summary> /// 从数据库中删除数据 /// </summary> /// <param name="DeleteString">Delete Sql语句</param> /// <param name="SqlConn">数据库连接</param> /// <returns>删除成功返回true</returns> public bool Delete(string DeleteString, SqlConnection SqlConn) {
return udiDataBase(DeleteString, SqlConn);
}
/// <summary> /// 把数据插入数据库 /// </summary> /// <param name="InsertString">Insert Sql语句</param> /// <param name="SqlConn">数据库连接</param> /// <returns>插入成功返回true</returns> public bool Insert(string InsertString, SqlConnection SqlConn) {
return udiDataBase(InsertString, SqlConn);
}
/// <summary> /// 根据Sql语句更新数据库 /// </summary> /// <param name="UDIString">更新语句</param> /// <param name="SqlConn">数据库连接</param> /// <returns>更新成功则返回true</returns> public bool udiDataBase(string UDIString, SqlConnection SqlConn) {
strError = "";
SqlConnection conn;
if (SqlConn == null) {
conn = DBconn();
}
else {
conn = SqlConn;
}
try {
if (conn.State == ConnectionState.Closed) {
conn.Open();
}
SqlCommand cmd = new SqlCommand(UDIString, conn);
cmd.CommandType = CommandType.Text;
intCount = cmd.ExecuteNonQuery();
return !(intCount < 1);
}
catch (Exception e) {
strError = "更新数据库失败:" + e.Message;
return false;
}
finally {
if (conn.State != ConnectionState.Closed) {
conn.Close();
}
}
}
}
}
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