Bei MysqlDataAdapter müssen wir nur den selectCommand setzen. Der insertCommand wird automatisch von MySqlCommandBuilder generiert
Ihr Code ist fast korrekt, nur 2 Änderungen sind erforderlich.
1. Fügen Sie die folgende Zeile vor dataAdapterCurrentTest.Update(ds.Tables["currentTest"]) hinzu
new MySqlCommandBuilder(dataAdapterCurrentTest);
2. Kommentieren Sie die folgende Codezeile
dataAdapterCurrentTest.InsertCommand=insertCmd
Der letzte Code ist also
class Program
{
static void Main(string[] args)
{
MySqlConnectionStringBuilder connBuilder = new MySqlConnectionStringBuilder();
connBuilder.Server = "ds2";
connBuilder.Database = "fhem";
connBuilder.UserID = "fhemdbuser";
connBuilder.Port = 3307;
connBuilder.Password = "!2345Abcde";
//connBuilder.DefaultCommandTimeout = 120;
//connBuilder.UseDefaultCommandTimeoutForEF = true;
//connBuilder.AllowUserVariables = true;
MySqlConnection conn = new MySqlConnection(connBuilder.ConnectionString);
conn.Open();
MySqlCommand selectCmdCurrent = new MySqlCommand("select `TIMESTAMP`, `DEVICE`, `TYPE`, `EVENT`, `READING`, `VALUE`, `UNIT` from current;", conn);
MySqlCommand selectCmdCurrentTest = new MySqlCommand("select `TIMESTAMP`, `DEVICE`, `TYPE`, `EVENT`, `READING`, `VALUE`, `UNIT` from currentTest;", conn);
MySqlCommand updateCmd = new MySqlCommand("update `currentTest` set `TIMESTAMP`[email protected],`DEVICE`[email protected],`TYPE`[email protected],`EVENT`[email protected],`READING`[email protected],`VALUE`[email protected],`UNIT`[email protected]", conn);
updateCmd.Parameters.Add("@p1", MySql.Data.MySqlClient.MySqlDbType.DateTime);
updateCmd.Parameters.Add("@p2", MySql.Data.MySqlClient.MySqlDbType.VarString, 128);
updateCmd.Parameters.Add("@p3", MySql.Data.MySqlClient.MySqlDbType.VarString, 128);
updateCmd.Parameters.Add("@p4", MySql.Data.MySqlClient.MySqlDbType.VarString, 512);
updateCmd.Parameters.Add("@p5", MySql.Data.MySqlClient.MySqlDbType.VarString, 128);
updateCmd.Parameters.Add("@p6", MySql.Data.MySqlClient.MySqlDbType.VarString, 128);
updateCmd.Parameters.Add("@p7", MySql.Data.MySqlClient.MySqlDbType.VarString, 128);
MySqlCommand insertCmd = new MySqlCommand("insert into `currentTest` values(@p1, @p2, @p3, @p4, @p5, @p6, @p7)", conn);
insertCmd.Parameters.Add("@p1", MySql.Data.MySqlClient.MySqlDbType.DateTime);
insertCmd.Parameters.Add("@p2", MySql.Data.MySqlClient.MySqlDbType.VarString, 128);
insertCmd.Parameters.Add("@p3", MySql.Data.MySqlClient.MySqlDbType.VarString, 128);
insertCmd.Parameters.Add("@p4", MySql.Data.MySqlClient.MySqlDbType.VarString, 512);
insertCmd.Parameters.Add("@p5", MySql.Data.MySqlClient.MySqlDbType.VarString, 128);
insertCmd.Parameters.Add("@p6", MySql.Data.MySqlClient.MySqlDbType.VarString, 128);
insertCmd.Parameters.Add("@p7", MySql.Data.MySqlClient.MySqlDbType.VarString, 128);
MySqlDataAdapter dataAdapterCurrent = new MySqlDataAdapter(selectCmdCurrent);
MySqlDataAdapter dataAdapterCurrentTest = new MySqlDataAdapter(selectCmdCurrentTest);
// MySqlCommandBuilder builder = new MySqlCommandBuilder(dataAdapterCurrent);
// dataAdapterCurrentTest.InsertCommand = insertCmd;
dataAdapterCurrentTest.UpdateCommand = updateCmd;
DataSet ds = new DataSet();
MySqlCommand prepareCmd = new MySqlCommand("truncate currentTest;", conn);
prepareCmd.ExecuteNonQuery();
//prepareCmd = new MySqlCommand("insert into currentTest select * from current;", conn);
//prepareCmd.ExecuteNonQuery();
prepareCmd = new MySqlCommand("INSERT INTO `currentTest` VALUES(\"2020-06-06 12:45:23\",\"DEVICE\", \"TYPE\", \"EVENT\", \"READING\", \"VALUE\", \"UNIT\")", conn);
for (int i = 0; i < 10; i++)
prepareCmd.ExecuteNonQuery();
dataAdapterCurrentTest.Fill(ds, "currentTest");
dataAdapterCurrent.Fill(ds, "current");
int row = 0;
Stopwatch sw = new Stopwatch();
for (int i = 0; i < 10; i++)
{
DataRow newrow = ds.Tables["currentTest"].NewRow();
newrow["Timestamp"] = DateTime.Now;
newrow["Device"] = "Device";
newrow["TYPE"] = "Type";
newrow["EVENT"] = "Event";
newrow["READING"] = "Reading";
newrow["VALUE"] = "Value";
newrow["UNIT"] = "Unit";
ds.Tables["currentTest"].Rows.Add(newrow);
}
new MySqlCommandBuilder(dataAdapterCurrentTest);
dataAdapterCurrentTest.Update(ds.Tables["currentTest"]);
ds.Tables["currentTest"].AcceptChanges();
}
}
