In a C# 2008 application I am getting the error message "Object reference not set to an instance of an object."
The line of code that is causing this to occur is the following:
I have a reference set to system.configuration and I have a using System.Configuration.
Below you will find my app.config file and code that I am referring to:
app.config file code:
The actual code:
Thus can you tell me how to fix this code?
The line of code that is causing this to occur is the following:
public eDataContext() : base(ConfigurationManager.ConnectionStrings["DEVConnectionString"].ConnectionString, mappingSource)
I have a reference set to system.configuration and I have a using System.Configuration.
Below you will find my app.config file and code that I am referring to:
app.config file code:
C#:
<connectionStrings>
<add name="esample.Properties.Settings.RPCSS_DEVConnectionString"
connectionString="Data Source=DEV2;Initial Catalog=DEV;Integrated Security=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
namespace eclient { using System.Data.Linq; using System.Data.Linq.Mapping; using System.Data; using System.Collections.Generic; using System.Reflection; using System.Linq; using System.Linq.Expressions; using System.ComponentModel; using System; using System.Configuration; public partial class eDataContext : System.Data.Linq.DataContext { [System.Data.Linq.Mapping.DatabaseAttribute(Name = "DEV")] private static System.Data.Linq.Mapping.MappingSource mappingSource = new AttributeMappingSource(); public eDataContext() : base(ConfigurationManager.ConnectionStrings["DEVConnectionString"].ConnectionString, mappingSource) { OnCreated(); } public eDataContext(string connection) : base(connection, mappingSource) { OnCreated(); } public eDataContext(System.Data.IDbConnection connection) : base(connection, mappingSource) { OnCreated(); } public eDataContext(string connection, System.Data.Linq.Mapping.MappingSource mappingSource) : base(connection, mappingSource) { OnCreated(); } public eDataContext(System.Data.IDbConnection connection, System.Data.Linq.Mapping.MappingSource mappingSource) : base(connection, mappingSource) { OnCreated(); }
Thus can you tell me how to fix this code?
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