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現在我使用Access數據庫作爲虛擬ODBC數據庫(所以我不會在開發期間損壞任何有價值的信息),並且在插入記錄時遇到問題。ODBC插入不能在Access數據庫上工作
我可以從該DB就好了Insert命令經歷,但是當我嘗試讀取記錄回它不存在
using (OdbcConnection conn = new OdbcConnection(@"Driver={Microsoft Access Driver (*.mdb, *.accdb)}; Dbq=" + Directory.GetCurrentDirectory() + @"\Setup DB.accdb"))
{
conn.Open();
int ID;
//Autoincrement doesn't work, so new ID is LASTID++
using (OdbcCommand query = new OdbcCommand("SELECT MAX(ID) AS LASTID FROM Setups", conn))
{
using (var reader = query.ExecuteReader())
{
reader.Read();
ID = int.Parse(reader["LASTID"].ToString()) + 1;
}
}
transaction = conn.BeginTransaction();
using (OdbcCommand insert = new OdbcCommand("INSERT INTO Setups (ID, PartNumber,LeafSide,Width) VALUES (?, ?, ?, ?)", conn))
{
//If ID is left out^then an error is thrown about the ID being null
insert.Parameters.Add("@ID", OdbcType.Int).Value = ID;
insert.Parameters.Add("@PartNumber", OdbcType.VarChar).Value = PartNo;
insert.Parameters.Add("@LeafSide", OdbcType.VarChar).Value = AorB;
insert.Parameters.Add("@Width", OdbcType.Double).Value = Width;
insert.Transaction = transaction;
//This temp shows that 1 record is modified
int temp = insert.ExecuteNonQuery();
transaction.Commit();
}
}
//try catch and rollback removed for display
我有一種感覺,我想的東西真正讀懂簡單,但對於我的生活,我無法弄清楚它是什麼。