Question

I have a dataset that is dynamically created from a csv file. What I want to do is insert the rows into my MS Access table but I cannot figure out where to start with this.

The headers of the data in the dataset can vary as far as the order but the name of the header will always match the access database. Do I have to statically call out the header name in the insert command or can I build the headers from the dataset?

I know how to create the connection and open it to the database but am not sure how to create in insert command to dynamically pull the table headers.

I am pretty green when it comes to C# programming so if you can spell it out for me I would really appreciate it!

Here is an example of the access table headers:

ID, Item, Cost, Retail

Then the CSV which will fill the dataset table. It might have Retail or it might not:

Item, Cost

Here is the code I have so far but it doesn’t write to the access table. If I vew the dtAccess it shows correctly.

 OleDbConnection myConnection = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=\"C:\\Database.accdb\";Persist Security Info=False;");
                myConnection.Open();

                string queryString = "SELECT * from " + lblTable.Text;

                OleDbDataAdapter adapter = new OleDbDataAdapter(queryString, myConnection);

                DataTable dtAccess = new DataTable();

                DataTable dtCSV = new DataTable();

                dtCSV = ds.Tables[0];

                using (new OleDbCommandBuilder(adapter))
                {
                    adapter.Fill(dtAccess);
                    dtAccess.Merge(dtCSV);
                    adapter.Update(dtAccess);
                }

                myConnection.Close();

Answer 1

Figured it out. Here is the code I used:

OleDbConnection myConnection = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=\"Database.accdb\";Persist Security Info=False;");

                //command to insert each ASIN
                OleDbCommand cmd = new OleDbCommand();

                //command to update each column (ASIN, Retail... from CSV)
                OleDbCommand cmd1 = new OleDbCommand();

                //load csv data to dtCSV datatabe
                DataTable dtCSV = new DataTable();

                dtCSV = ds.Tables[0];

                // Now we will collect data from data table and insert it into database one by one
                // Initially there will be no data in database so we will insert data in first two columns
                // and after that we will update data in same row for remaining columns
                // The logic is simple. 'i' represents rows while 'j' represents columns

                cmd.Connection = myConnection;
                cmd.CommandType = CommandType.Text;
                cmd1.Connection = myConnection;
                cmd1.CommandType = CommandType.Text;

                myConnection.Open();

                for (int i = 0; i <= dtCSV.Rows.Count - 1; i++)
                {
                    cmd.CommandText = "INSERT INTO " + lblTable.Text + "(ID, " + dtCSV.Columns[0].ColumnName.Trim() + ") VALUES (" + (i + 1) + ",'" + dtCSV.Rows[i].ItemArray.GetValue(0) + "')";

                    cmd.ExecuteNonQuery();

                    for (int j = 1; j <= dtCSV.Columns.Count - 1; j++)
                    {
                        cmd1.CommandText = "UPDATE " + lblTable.Text + " SET [" + dtCSV.Columns[j].ColumnName.Trim() + "] = '" + dtCSV.Rows[i].ItemArray.GetValue(j) + "' WHERE ID = " + (i + 1);

                        cmd1.ExecuteNonQuery();
                    }
                }

                myConnection.Close();