Question

我的问题仍然没有解决，因此我从C＃OleDbDataAdapter回来了更新dbf文件[free table -vfp]的不同问题。

string MyConStr = "Provider=VFPOLEDB.1; Data Source='C:\\Temp'; Persist Security Info=False";

VFPDAp = new OleDbDataAdapter();
VFPDAp.InsertCommand = new OleDbCommand();
VFPDAp.UpdateCommand = new OleDbCommand();

VFPDAp.InsertCommand.CommandText = "insert into my_table1 (my_time,reminder) values(?, ?, ?)";
VFPDAp.UpdateCommand.CommandText = "update my_table1 set my_time=?, reminder=? where sl_no=? ";

VFPDAp.InsertCommand.Connection = OleCon1;
VFPDAp.UpdateCommand.Connection = OleCon1; 

OleDbParameter Par1 = new OleDbParameter("my_time", -1);
Par1.DbType = DbType.String;
Par1.SourceColumn = "my_time";
Par1.ParameterName = "my_time";

OleDbParameter Par2 = new OleDbParameter("reminder", -1);
Par2.DbType = DbType.String;
Par2.SourceColumn = "reminder";
Par2.ParameterName = "reminder";

OleDbParameter Par3 = new OleDbParameter("my_time", -1);
Par3.DbType = DbType.String;
Par3.SourceColumn = "my_time";
Par3.ParameterName = "my_time";

OleDbParameter Par4 = new OleDbParameter("reminder", -1);
Par4.DbType = DbType.String;
Par4.SourceColumn = "reminder";
Par4.ParameterName = "reminder";

VFPDAp.InsertCommand.Parameters.Add(Par1);
VFPDAp.InsertCommand.Parameters.Add(Par2);
VFPDAp.UpdateCommand.Parameters.Add(Par3);
VFPDAp.UpdateCommand.Parameters.Add(Par4);

OleCon1.ConnectionString = MyConStr;
OleCon1.Open();
VFPDAp.Update(VfpTbl);
OleCon1.Close();

感谢帮助

Answer 1

您的Insert语句有3个“？”但只有2个parms

insert into my_table1 (my_time,reminder) values(?, ?, ?)
(should it be 3 columns inserted or 2...)

update my_table1 set my_time=?, reminder=? where sl_no=?

每个“？”需要它自己的参数，所以你需要总共5（或6通过插入）

OleDbException未处理：SQL：Column＆＃39; Q0P2＆＃39;找不到[从oledataadapter更新dbf免费表]

1 个答案: