C#数据集访问数据库

Question

我有一个从csv文件动态创建的数据集.我想要做的是将行插入我的MS Access表,但我无法弄清楚从哪里开始.

数据集中数据的标题可以根据顺序而变化,但标题的名称将始终与访问数据库匹配.我是否必须在insert命令中静态调用标题名称,还是可以从数据集中构建标题？

我知道如何创建连接并将其打开到数据库但不知道如何在insert命令中创建动态拉动表头.

在C#编程方面我很绿,所以如果你能为我拼出来,我真的很感激!

以下是访问表标头的示例:

ID,项目,成本,零售

然后是CSV,它将填充数据集表.它可能有零售或可能没有:

物品,成本

这是我到目前为止的代码,但它没有写入访问表.如果我发现dtAccess它正确显示.

 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

弄清楚了。这是我使用的代码：

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();