更新不能從datagridview使用npgsql

Question

我有問題通過使用Npgsql的datagridview更新我的數據。我想從datagridview動態更新我的表。

這裏是我的代碼更新：

NpAdapter.UpdateCommand = new NpgsqlCommand("update sessions set \"Visit Number:\" = :visit_num, \"ID:\" = :id, \"ENTERED BY:\" = :entered " + 
"where \"Visit Number:\" = :visit_num_old, \"ID:\" = :id_old, \"ENTERED BY:\" = :entered_old", this.dataconnect); 
NpAdapter.UpdateCommand.Parameters.Add(new NpgsqlParameter("visit_num", DbType.Int32, 10) { Direction = ParameterDirection.Input, SourceColumn = "Visit Number:" }); 
NpAdapter.UpdateCommand.Parameters.Add(new NpgsqlParameter("id", DbType.AnsiStringFixedLength, 50) { Direction = ParameterDirection.Input, SourceColumn = "ID:" }); 
NpAdapter.UpdateCommand.Parameters.Add(new NpgsqlParameter("entered", DbType.AnsiStringFixedLength, 50) { Direction = ParameterDirection.Input, SourceColumn = "ENTERED BY:" }); 

NpAdapter.Update(dset, "sessions"); 

我不知道我做錯了。任何人都可以幫助我。我試圖弄清楚這很長一段時間。

Answer 1

這是我找到的解決方案。

NpgsqlCommand command = new NpgsqlCommand("UPDATE sessions SET \"Visit Number:\" = @visitnum,\"ENTERED BY:\" = @enteredby WHERE \"Visit Number:\" = @visitnum", this.connection); 

command.Parameters.Add("@visitnum", NpgsqlTypes.NpgsqlDbType.Integer, 12, "Visit Number:"); 
command.Parameters.Add("@enteredby", NpgsqlTypes.NpgsqlDbType.Varchar, 50, "ENTERED BY:"); 
NpgsqlParameter parameter = command.Parameters.Add("@oldvisitnum", NpgsqlTypes.NpgsqlDbType.Integer, 12, "Visit Number:"); 

parameter.SourceVersion = DataRowVersion.Original; 
NpAdapter.UpdateCommand = command; 
NpAdapter.Update(dset,"sessions"); 
MessageBox.Show("Data Updated!!!");