Insert Entire Datatable into Database at Once Instead of Row by Row

Insert entire DataTable into database at once instead of row by row?

I discovered SqlBulkCopy is an easy way to do this, and does not require a stored procedure to be written in SQL Server.

Here is an example of how I implemented it:

// take note of SqlBulkCopyOptions.KeepIdentity , you may or may not want to use this for your situation.  

using (var bulkCopy = new SqlBulkCopy(_connection.ConnectionString, SqlBulkCopyOptions.KeepIdentity))
{
      // my DataTable column names match my SQL Column names, so I simply made this loop. However if your column names don't match, just pass in which datatable name matches the SQL column name in Column Mappings
      foreach (DataColumn col in table.Columns)
      {
          bulkCopy.ColumnMappings.Add(col.ColumnName, col.ColumnName);
      }

      bulkCopy.BulkCopyTimeout = 600;
      bulkCopy.DestinationTableName = destinationTableName;
      bulkCopy.WriteToServer(table);
}

How to insert a data table into SQL Server database table?

Create a User-Defined TableType in your database:

CREATE TYPE [dbo].[MyTableType] AS TABLE(
    [Id] int NOT NULL,
    [Name] [nvarchar](128) NULL
)

and define a parameter in your Stored Procedure:

CREATE PROCEDURE [dbo].[InsertTable]
    @myTableType MyTableType readonly
AS
BEGIN
    insert into [dbo].Records select * from @myTableType 
END

and send your DataTable directly to sql server:

using (var command = new SqlCommand("InsertTable") {CommandType = CommandType.StoredProcedure})
{
    var dt = new DataTable(); //create your own data table
    command.Parameters.Add(new SqlParameter("@myTableType", dt));
    SqlHelper.Exec(command);
}

To edit the values inside stored-procedure, you can declare a local variable with the same type and insert input table into it:

DECLARE @modifiableTableType MyTableType 
INSERT INTO @modifiableTableType SELECT * FROM @myTableType

Then, you can edit @modifiableTableType:

UPDATE @modifiableTableType SET [Name] = 'new value'

Inserting data into datatable based on row value

Is it possible to update the value column of a specific row based on
the value of the ID of that row

Yes, you can use DataRow.SetField and a little bit of Linq:

var rowsToUdate = dt.AsEnumerable()
    .Where(r => r.Field<int>("ID") == id);
foreach(DataRow row in rowsToUpDate)
    row.SetField("Value", newValue);

...pretty much to be able to run a SQL query of there is faster or
better way?

So do you want to update the database instead of the DataTable? This part is confusing.

Insert datatable into existing Access file

If at all possible, your best bet is to let Access do the work with built-in tools. I would link the SQL Server table to your Access DB, and then create a Make-Table query in Access that creates a new table from your linked SQL Server table. You can pull the whole table or just a subset of it, depending on how you set up your query.

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