如何重写EF DBContext 获取链接字符串的方法？

u014440193 2015-08-27 09:04:22

如题：如何重写EF DBContext 获取链接字符串的方法？

下面这一段是放在web.config的EF链接字符串，我想能否实现我先去获取这一段链接字符串然后再传给DBContext，而不是让它去自动加载读取

<add name="EntitiesContext" connectionString="metadata=res://*/Entities.csdl|res://*/Entities.ssdl|res://*/Entities.msl;provider=Oracle.DataAccess.Client;provider connection string="data source=192.168.1.50:1521/transdb;password=iqs;persist security info=True;user id=IQS""
providerName="System.Data.EntityClient;Max Pool Size=20;Min Pool Size=10;Pooling=true;" />

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圣殿骑士18 2015-08-28

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你应该有些EF基础的吧， public partial class leadmw2DbFirst : DbContext 继承DbContext的地方只有一处，你全文搜索

u014440193 2015-08-27

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引用 1 楼 daixf_csdn 的回复:

请看：

public partial class leadmw2DbFirst : DbContext
    {
        //使用自定义连接串
        private static string GetEFConnctionString()
        {
            //string connString = "metadata=res://*/EFModel_FromDb.csdl|res://*/EFModel_FromDb.ssdl|res://*/EFModel_FromDb.msl;provider=System.Data.SqlClient;provider connection string=\"data source=localhost;initial catalog=leadmw2_ef;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework\"";
            //string enString = SecurityHelper.DESEncrypt(connString);
            //string enString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
            
            string enString = ConfigurationManager.AppSettings["customConnString"];
            string connString = SecurityHelper.DESDecrypt(enString);

            return connString;
        }
        public leadmw2DbFirst()
            : base(GetEFConnctionString())
        {
        }

        //public leadmw2DbFirst()
        //    : base("name=leadmw2DbFirst")
        //{
        //}

这一段应该放在哪里呢

圣殿骑士18 2015-08-27

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请看：

public partial class leadmw2DbFirst : DbContext
    {
        //使用自定义连接串
        private static string GetEFConnctionString()
        {
            //string connString = "metadata=res://*/EFModel_FromDb.csdl|res://*/EFModel_FromDb.ssdl|res://*/EFModel_FromDb.msl;provider=System.Data.SqlClient;provider connection string=\"data source=localhost;initial catalog=leadmw2_ef;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework\"";
            //string enString = SecurityHelper.DESEncrypt(connString);
            //string enString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
            
            string enString = ConfigurationManager.AppSettings["customConnString"];
            string connString = SecurityHelper.DESDecrypt(enString);

            return connString;
        }
        public leadmw2DbFirst()
            : base(GetEFConnctionString())
        {
        }

        //public leadmw2DbFirst()
        //    : base("name=leadmw2DbFirst")
        //{
        //}