?

新建ConnectionTestInfo類
using System.Data.SqlClient;
using System.Data;

public class ConnectionTestInfo
??? {
??????? private static SqlConnection mySqlConnection;? //mySqlConnection?? is?? a?? SqlConnection?? object
??????? private static string ConnectionString = "";
??????? private static bool IsCanConnectioned = false;

??????? /// <summary>
??????? /// 測試連接數據庫是否成功
??????? /// </summary>
??????? /// <returns></returns>
??????? public static bool ConnectionTest()
??????? {
??????????? //獲取數據庫連接字符串
??????????? ConnectionString = ConnectionInfo.ConnectionString();
??????????? //創建連接對象
??????????? mySqlConnection = new SqlConnection(ConnectionString);
??? ??? ??? //ConnectionTimeout 在.net 1.x 可以設置 在.net 2.0后是只讀屬性，則需要在連接字符串設置
??????????? //如：server=.;uid=sa;pwd=;database=PMIS;Integrated Security=SSPI; Connection Timeout=30
??????????? //mySqlConnection.ConnectionTimeout = 1;//設置連接超時的時間
??????????? try
??????????? {
??????????????? //Open DataBase
??????????????? //打開數據庫
??????????????? mySqlConnection.Open();
??????????????? IsCanConnectioned = true;
??????????? }
??????????? catch
??????????? {
??????????????? //Can not Open DataBase
??????????????? //打開不成功 則連接不成功
??????????????? IsCanConnectioned = false;
??????????? }
??????????? finally
??????????? {
??????????????? //Close DataBase
??????????????? //關閉數據庫連接
??????????????? mySqlConnection.Close();
??????????? }
??????????? //mySqlConnection?? is?? a?? SqlConnection?? object
??????????? if (mySqlConnection.State == ConnectionState.Closed || mySqlConnection.State == ConnectionState.Broken)
??????????? {
??????????????? //Connection?? is?? not?? available?
??????????????? return IsCanConnectioned;
??????????? }
??????????? else
??????????? {
??????????????? //Connection?? is?? available?
??????????????? return IsCanConnectioned;
??????????? }
??????? }
??? }

其中數據庫字符串調用了類ConnectionInfo的方法ConnectionString
public class ConnectionInfo
??? {
??????? public ConnectionInfo() { }

??????? /// <summary>
??????? /// 從配置文件中讀取數據庫聯接字符串
??????? /// </summary>
??????? /// <returns></returns>
??????? public static string ConnectionString()
??????? {
??????????? return (ConfigurationSettings.AppSettings["ConnectionString"]);
??????? }

??? }

轉載于:https://www.cnblogs.com/52yixin/articles/1822534.html

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