how to change connection string entity framework in runtime

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C#

C#4.0

connectionstring

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how to change connection string entity framework in runtime

code in my appconfig file :

XML

<?xml version="1.0"?>
<configuration>
  <connectionStrings>
    <add name="RelationAtOfficeEntities" connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=System.Data.SqlClient;provider connection string="Data Source=.;Initial Catalog=RelationAtOffice;Integrated Security=True;MultipleActiveResultSets=True"" providerName="System.Data.EntityClient"/>
  </connectionStrings>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>

I want to change the following code :

XML

    <?xml version="1.0"?>
<configuration>
  <connectionStrings>
    <add name="RelationAtOfficeEntities" connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=System.Data.SqlClient;provider connection string="Data Source=127.10.10.23,1356;Initial Catalog=RelationAtOffice;Integrated Security=True;MultipleActiveResultSets=True"" providerName="System.Data.EntityClient"/>
  </connectionStrings>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>

just data source changed.

How is it done?

Posted 17-Oct-12 7:25am

mmd20092010

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Comments

ZurdoDev 17-Oct-12 13:46pm

You want to change a config file? I'm confused, all you do is change the file. What's the question?

fjdiewornncalwe 17-Oct-12 14:42pm

Why would you need to change the connection string at runtime. I completely understand if you want to change the connection string on a deployment, but at runtime doesn't really make sense. Could you explain why, please?

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Rohit Shrivastava · Answer 1 · 2012-10-17T16:41:00

You can create objectcontext based on dynamic connection string if you use the non-default overloaded constructor. Keep the format of connection string in appsettings and change the datasource dynamically and create your ObjectContext, till the time schema remains same it will work perfectly.

Please refer documentation at. http://msdn.microsoft.com/en-us/library/system.data.objects.objectcontext.objectcontext.aspx[^]