Display Linq data with Ms Access database: "Missing semicolon (;) at the end of the SQL statement."

Question

I am using Linq data mapping with the Ms Access database. I create OleDbConnectionas usual and pass it on DataContext.

So far, it worked fine to retrieve data from tables based on complex queries, and even relationships work to automatically populate the list of child objects in a 1-N ratio.

However, when I try to insert data using the following code:

    [Table(Name = "test_table")]
    public class test_item {
        [Column(IsPrimaryKey = true, IsDbGenerated = true)]
        public int field1;
        [Column]
        public int field2;
    }
    public void Test() {
        Table<test_item> tbl = this.GetTable<test_item>();
        test_item x = new test_item();
        x.field2 = 1222;
        tbl.InsertOnSubmit(x);
        this.SubmitChanges();
    }

I get the following error:

"Missing semicolon (;) at end of SQL statement."
at System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr)
at System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult)
at System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult)
at System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult)
at System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method)
at System.Data.OleDb.OleDbCommand.ExecuteReader(CommandBehavior behavior)
at System.Data.OleDb.OleDbCommand.ExecuteDbDataReader(CommandBehavior behavior)
at System.Data.Common.DbCommand.ExecuteReader()
at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
at System.Data.Linq.ChangeDirector.StandardChangeDirector.DynamicInsert(TrackedObject item)
at System.Data.Linq.ChangeDirector.StandardChangeDirector.Insert(TrackedObject item)
at System.Data.Linq.ChangeProcessor.SubmitChanges(ConflictMode failureMode)
at System.Data.Linq.DataContext.SubmitChanges(ConflictMode failureMode)
at System.Data.Linq.DataContext.SubmitChanges()
at MyClass.Test() in C:\...\MyClass.cs:line 123

If I remove the flag IsDbGenerated, it does not crash, but in this case I have to specify the primary key ( x.field1 = 55), but I would like it to be assigned automatically.

How to avoid an exception?

Answer 1

:). , , Linq2SQL .). Linq2SQL Access, , - Access SQL TSQL, , - . , Linq ( , ), Access. , , DataContext, Insert * ( InsertTest_Table), -

void InsertTest_Table(Test_Table t)
{
    IDbCommand cmd;
    cmd = Connection.CreateCommand();
    cmd.Transaction = this.Transaction;
    cmd.CommandText = "INSERT INTO [Test_Table] ([Field2]) VALUES (@p0)";
    cmd.Parameters.Add(new OleDbParameter("p0", t.field2));
    cmd.ExecuteNonQuery();

    cmd = Connection.CreateCommand();
    cmd.Transaction = this.Transaction;
    cmd.CommandText = "SELECT @@IDENTITY";
    t.field1 = Convert.ToInt32(cmd.ExecuteScalar());
}

, , , SQLExpress ( .SDF) crea

Answer 2

, Linq SQL. Linq to SQL SQL Server, Access.

Linq Entities?

, , Access ADO.NET, EF.

Answer 3

Code generation was left without SQL Server generation, for SQL Server there is no need to have a semicolon for MS SQL Server. Try changing the partial methods for your classes, use this link - http://www.devart.com/linqconnect/docs/ExecuteDynamicMethods.html . Maybe this can help you.