错误求助：ConnectionString 属性尚未初始化

Question

 public static OleDbConnection getConnOra()
    {
        if (connOra == null)
            initalConnect();
        connOra.Open();
        return connOra;
    }高手在帮忙给看下啊~！谢谢

Answer 1

就是说你没有给connectionstring赋值。

Answer 2

全部代码在：http://topic.csdn.net/u/20081122/13/df22f129-4638-4d0b-91b8-aa7e4bbda07b.html这个帖子里。
帮忙在看下啊，谢谢

Answer 3

Connection 的 ConnectionString为null或Empty

Answer 4

initalConnect() 此方法没有调用执行，因此未初始化。

Answer 5

查看下App中连接字符串配置了没？

Answer 6

我帮你改了，你看看    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.OleDb; /// <summary> 
/// doubleConn 的摘要说明 
/// </summary> 
public class doubleConn 
{ 
    protected static string connectionStringOra = ConfigurationSettings.AppSettings["ConnectionStringOracle"]; 
    protected static string connectionStringAccess = ConfigurationSettings.AppSettings["ConnectionStringAccess"];     private static System.Data.OleDb.OleDbConnection connOra = null; 
    private static System.Data.OleDb.OleDbConnection connAccess = null;     private static void initalConnect() 
    { 
        connOra = new System.Data.OleDb.OleDbConnection(connectionStringOra); 
        connAccess = new System.Data.OleDb.OleDbConnection(connectionStringAccess); 
    }     
    public static OleDbConnection getConnOra() 
    { 
        if (connOra == null) 
            initalConnect(); 
        connOra.Open(); 
        return connOra; 
    }     public static OleDbConnection getConnAccess() 
    { 
        if (connAccess == null) 
            initalConnect(); 
        connAccess.Open(); 
        return connAccess; 
    } 
}
public class demo
{    public void addDemo()
    {
        OleDbConnection connOra = doubleConn.getConnOra();
        OleDbConnection connAccess = doubleConn.getConnAccess();        String strAddOra = @"insert into or_user_tb(id,name,password,username,sex,phone)values(1,'MAQH','mybrother','MAQH','1','1390123456')";
        String strAddAcc = @"insert into acc_user_tb(id,name,password,username,sex,phone)values(1,'MAQH','mybrother','MAQH','1','1390123456')";        System.Data.OleDb.OleDbCommand cmdOra = new System.Data.OleDb.OleDbCommand(strAddOra, connOra);
        System.Data.OleDb.OleDbCommand cmdAcc = new System.Data.OleDb.OleDbCommand(strAddAcc, connAccess);        cmdOra.ExecuteNonQuery();
        cmdAcc.ExecuteNonQuery();
    }
}

Answer 7

把connectionStringOra = ConfigurationSettings.AppSettings["ConnectionStringOracle"]; 
和connectionStringAccess = ConfigurationSettings.AppSettings["ConnectionStringAccess"];
这两句写到：
    private static void initalConnect() 
    {
connectionStringOra = ConfigurationSettings.AppSettings["ConnectionStringOracle"]; 
connectionStringAccess = ConfigurationSettings.AppSettings["ConnectionStringAccess"];
 
        connOra = new System.Data.OleDb.OleDbConnection(connectionStringOra); 
        connAccess = new System.Data.OleDb.OleDbConnection(connectionStringAccess); 
    }