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sqlHelper.cs

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Code
using?System.Data;
using?System.Data.SqlClient;

namespace?lsb.DBUtility
{
????///?<summary>
????///?SQL?Server?數據庫操作類
????///?</summary>
????public?class?SqlHelper?:?lsb.DBtility.IDBHelper
????{
????????private?string?ConnectionString;

????????private?SqlConnection?conn;
????????private?SqlDataAdapter?da;
????????private?SqlCommand?cmd;

????????public?bool?GetConnectionString(ref?string?ErrMsg)
????????{
????????????ConnectionString?=?"Data?Source=.;Initial?Catalog=Hotel;Integrated?Security=True";
????????????return?true;
????????}

????????public?bool?Open(ref?string?ErrMsg)
????????{
????????????try
????????????{
????????????????conn?=?new?SqlConnection();
????????????????if?((conn.State?==?ConnectionState.Broken)?||?(conn.State?==?ConnectionState.Closed))
????????????????{
????????????????????if?(!GetConnectionString(ref?ErrMsg))
????????????????????{
????????????????????????return?false;
????????????????????}
????????????????????conn.ConnectionString?=?ConnectionString;
????????????????????conn.Open();
????????????????????return?true;
????????????????}
????????????????return?false;
????????????}
????????????catch?(SqlException?ex)
????????????{
????????????????this.SetErrMsg(ex,?ref?ErrMsg);
????????????????return?false;
????????????}
????????}

????????public?bool?Close(ref?string?ErrMsg)
????????{
????????????try
????????????{
????????????????if?((conn.State?!=?ConnectionState.Broken)?&&?(conn.State?!=?ConnectionState.Closed))
????????????????{
????????????????????conn.Close();
????????????????????return?true;
????????????????}
????????????????return?false;
????????????}
????????????catch?(SqlException?ex)
????????????{
????????????????this.SetErrMsg(ex,?ref?ErrMsg);
????????????????return?false;
????????????}
????????}

????????public?bool?ExceuteNonQuery(string?sql,?ref?string?ErrMsg)
????????{
????????????throw?new?System.NotImplementedException();
????????}

????????public?bool?GetDataSet(string?sql,?ref?DataSet?ds,?ref?string?ErrMsg)
????????{
????????????throw?new?System.NotImplementedException();
????????}

????????private?bool?SetErrMsg(SqlException?ex,?ref?string?ErrMsg)
????????{
????????????ErrMsg?=?ex.Message;
????????????return?true;
????????}

????}
}

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IDBHelper.cs

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Code
using?System;
using?System.Data;

namespace?lsb.DBtility
{
????public?interface?IDBHelper
????{
????????///?<summary>
????????///?取得數據庫連接字符串
????????///?</summary>
????????///?<returns></returns>
????????bool?GetConnectionString(ref?string?ErrMsg);

????????///?<summary>
????????///?打開數據庫連接
????????///?</summary>
????????bool?Open(ref?string?ErrMsg);

????????///?<summary>
????????///?關閉數據庫連接
????????///?</summary>
????????bool?Close(ref?string?ErrMsg);

????????///?<summary>
????????///?執行?SQL?語句?無返回結果
????????///?</summary>
????????bool?ExceuteNonQuery(string?sql,?ref?string?ErrMsg);

????????///?<summary>
????????///?取得DataSet數據集
????????///?</summary>
????????bool?GetDataSet(string?sql,?ref?DataSet?ds,?ref?string?ErrMsg);

????}
}

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不知道這樣寫好不好， 心里還沒有數 ~~

上面的方法中要不要用 ref stirng ErrMsg 呢？

還是把上面的方法改為靜態方法?

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轉載于:https://www.cnblogs.com/LinFx/archive/2009/02/26/2123694.html

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