I have a MVC WebAPI project and a ADO.NET Entity Framework project in one solution. I am connecting and working with the database from the ADO.NET Entity Framework project, but when I add the ado.net project to the MVC WebAPI project so that I can store data in the database the same connection string is not working that works in the ADO.NET project.
I've copied the connection string from the ado.net project and pasted it into the web.config file of the mvc project and I am getting the initial catalog keyword not supported.
Below is the connection string that connects perfectly from the ADO.NET project but does not work in the MVC project.
<add name="StorefrontSystemEntities1"
connectionString="metadata=res://*/StorefrontSystemDB.csdl|res://*/StorefrontSystemDB.ssdl|res://*/StorefrontSystemDB.msl;provider=System.Data.SqlClient;provider connection string=data source=localhost;initial catalog=StorefrontSystem;persist security info=True;user id=xxxxx;password=xxxxx;MultipleActiveResultSets=True;App=EntityFramework"
providerName="System.Data.EntityClient" />
What am I missing here?
I am not sure exactly what happened here but it is working now.. I noticed that for provider connection string the " " are " ".
<add name="StorefrontSystemEntities1"
connectionString="metadata=res://*/StorefrontSystemDB.csdl|res://*/StorefrontSystemDB.ssdl|res://*/StorefrontSystemDB.msl;
provider=System.Data.SqlClient;
provider connection string="data source=localhost;initial catalog=StorefrontSystem;persist security info=True;
user id=XXX;password=XXXXX
MultipleActiveResultSets=True;App=EntityFramework""
providerName="System.Data.EntityClient" />
I have no idea what happened here.
Related
I have WebApi solution which has WebApI project and DataModel project(Class Library).
DataModel project has WebApiDbModel.edmx.
Below is the connectionstring :
<connectionStrings>
<add name="WebApiDbEntities" connectionString="metadata=res://*/WebApiDbModel.csdl|res://*/WebApiDbModel.ssdl|res://*/WebApiDbModel.msl;provider=System.Data.SqlClient;provider connection string="data source=MachineName\SQLEXPRESS;initial catalog=DbName;integrated security=True;multipleactiveresultsets=True;application name=EntityFramework"" providerName="System.Data.EntityClient" />
</connectionStrings>
I have copied my connectionstring to Web.config of WebApi project.
When I run the project locally and make call using postman, I am getting below exception in DataModel project code:
System.Data.Entity.Core.MetadataException: 'Unable to load the specified metadata resource.
I tried changing connectionstring portion as below:
connectionString="metadata=res://*/ but this don't work.
Using VS 2017 and EF version is 6.1.3
i'm new in LINQ.I have used LINQ to SQL class in my asp.net mvc 3.now when it comes to deployment in iis how can i manage connection ?i'm stuck here.help plz ,thankx in advance
Are you managing the connection via Web.config?
<connectionStrings>
<remove name="MyConnectionString"/>
<add name="MyConnectionString" connectionString="XXXXXXXXXX"
providerName="System.Data.SqlClient" />
</connectionStrings>
You should verify that the connectionStrings is pointing to the right SQL server
edit-1
Just to be sure we are on the same page on "managing the connection via Web.config" I mean via the partial class:
public partial class MyDataContext{
public MyDataContext()
: base(ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString,mappingSource)
{
}
}
And of course you need to change also:
I know this is a common issue faced by beginners in EF and there have been multiple questions and answers on the same here, but still I have not been able to still resolve the issue.
I am using EF 4.1 and MVC 3 and have generated the EF model from the DB in a separate library. I have copied the connection string from the app.config in the supporting library to the web.config of my application. I am also instantiating the object context by passing the web.config connection string.
string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["MasterDataContainer"].ConnectionString;
context = new MasterDataContainer(connectionString);
The connection string in web.config is as below
<connectionStrings>
<add name="MasterDataContainer" connectionString="metadata=res://*/MasterData.csdl|res://*/MasterData.ssdl|res://*/MasterData.msl;provider=System.Data.SqlClient;provider connection string="Data Source=.;Initial Catalog=MasterData;Integrated Security=True;MultipleActiveResultSets=True;Application Name=EntityFramework"" providerName="System.Data.EntityClient" />
</connectionStrings>
I am getting the error "Keyword not supported : data source".
Any help on this is appreciated.
You don't need the EntityConnectionStringBuilder since you already have an EF connection string. i.e. just
string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["MasterDataContainer"].ConnectionString;
context = new MasterDataContainer(connectionString);
EntityConnectionStringBuilder can be used to build up an EF connection from e.g. a vanilla .NET one.
Edit
It looks like you've encountered this problem here. The workaround is to escape the load the connection string and then replace the " with "'"
What might be easier altogether is to use the name=ConnStringName overload of ObjectContext / DbContext. In your case, this would be
context = new MasterDataContainer("name=MasterDataContainer");
Note also if you view the source of the generated Context (probably MasterDataContainer.Context.cs) that the default constructor should have the EntityContainerName property hardcoded into it, so you might not need to provide a connectionstring at all to the constructor, provided that you keep the same EntityContainerName.
http://msdn.microsoft.com/en-us/library/bb739017.aspx
easiest way to solve this issue is rewrite your EF conn string (replacing the amp; and quot;):
from ORIGINAL
<add name="Entities" connectionString="metadata=res://*/EntityModel.csdl|res://*/EntityModel.ssdl|res://*/EntityModel.msl;provider=System.Data.SqlClient;provider connection string="metadata=res://*/EntityModel.csdl|res://*/EntityModel.ssdl|res://*/EntityModel.msl;provider=System.Data.SqlClient;provider connection string="data source=<SERVER\INSTANCE>;initial catalog=<BDD>;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework""" providerName="System.Data.EntityClient" />
to FIXED
<add name="Entities" connectionString="metadata=res://*/EntityModel.csdl|res://*/EntityModel.ssdl|res://*/EntityModel.msl;provider=System.Data.SqlClient;provider connection string='metadata=res://*/EntityModel.csdl|res://*/EntityModel.ssdl|res://*/EntityModel.msl;provider=System.Data.SqlClient';provider connection string='data source=<SERVER\INSTANCE>;initial catalog=<BDD>;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework;'" providerName="System.Data.EntityClient" />
Just change then Entities name and the tags SERVER\INSTANCE and BDD with your values and that's it.
I hope this saves you a few days of research. Enjoy!
I am new to ASP.net's MVC 3 (using VB) and I am trying to create an application that would connect to an SQL 2008 server database. I have gone through a tutorial (Microsoft ASP.net's Movie DB tutorial) but the tutorial uses SQL compact edition. I am having a hard time connecting. Am I correct in assuming that once I create a model, I should be able to just connect to SQL 2008 by changing the connection string in the Web.config file, found at the root of the application folder? I deleted the sql ce database from the App_Data folder. In Microsoft SQL Server Management Studio I created a new database. I then added this to my Web.config file:
<connectionStrings>
<add name="ConnectionName"
providerName="System.Data.SqlClient"
connectionString="Data Source=DELERIUM-PC;Initial Catalog=iDjItDb;Integrated Security=True" />
</connectionStrings>
The when I run the app, and try to view the controller associated with the model, i get this error:
The model backing the 'iDjItDBContext' context has changed since
the database was created. Either manually delete/update the database,
or call Database.SetInitializer with an IDatabaseInitializer instance.
For example, the DropCreateDatabaseIfModelChanges strategy will
automatically delete and recreate the database, and optionally seed it
with new data.
What must I do to connect and work with a 2008 SQL database?
Thanks
jason
You can remove the IncludeMetadataConvention in your context class if you are positive that your model is compatible with the database.
public class iDjItDBContext : DBContext
{
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<IncludeMetadataConvention>();
}
}
Otherwise you need to set the initializer in the Application_Start() method of your Global.asax.cs file.
Database.SetInitializer<iDjItDBContext>(
new DropCreateDatabaseIfModelChanges<iDjItDBContext>());
Otherwise you can take the Migrations option where an external tool will generate the change script.
Edit
Change the connection string name to iDjItDBContext so that the name matches with the DbContext name.
<connectionStrings>
<add name="iDjItDBContext"
providerName="System.Data.SqlClient"
connectionString="Data Source=DELERIUM-PC;Initial Catalog=iDjItDb;Integrated Security=True" />
</connectionStrings>
Or create a constructor in your context and pass the name of the connection string.
public class iDjItDBContext : DBContext
{
public iDjItDBContext() : base("ConnectionName")
{
}
}
I'm trying to generate a Controller usind the Scaffolding Template "Controller with read/write actions and views, using Entity Framework".
I created an ADO.net Data Entity Model and connected it to an MSSQL 2008 DB (hosted by GoDaddy) and I am able to select the correct Model class and Data context class, but when I click "Add", I get the following error:
Unable to retrieve metadata for 'Project.Models.ModelClass'. The entry 'ProjectDataContext' has already been added. (C:\Users...\Temp\tmpD167.tmp line 13)
The file "tmpD167.tmp" is a copy of my web.config
Line 13 is a connection string that looks like this (post sanitation):
<add name="ProjectDataContext" connectionString="metadata=res://*/Models.Project.csdl|res://*/Models.Project.ssdl|res://*/Models.Project.msl;provider=System.Data.SqlClient;provider connection string="data source=project.db.12345678.hostedresource.com;initial catalog=projectdb;persist security info=True;user id=projectdbuser;password=Password00##;multipleactiveresultsets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
I have 2 other connection strings (one for ApplicationServices and the other for the project data) that are on lines 11 and 12.
Is my connection string formatted correctly?
can you remove your .edmx file and the reference to it in the web config and thenrecreate it?