使用OleDbParamater创建查询时出现C#语法错误

Question

我正在使用OleDbParameter构建一个OleDbCommand，以便将记录INSERT到MS Access中。但是当我执行语句时，我得到了语法错误。如果任何人都能看到阻止查询成功执行的原因，这将是一个巨大的帮助。

这是我的代码：

string query = "INSERT INTO Customer (customerID, date, time, telephone, fax,"
    + "name, sourceAddress, destAddress, via1, via2, via3,"
    + "priority, ourReference) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";

OleDbCommand oleDbCommand = new OleDbCommand(query, oleDbConnection);

OleDbParameter customerID = new OleDbParameter();
OleDbParameter date = new OleDbParameter();
OleDbParameter time = new OleDbParameter();
OleDbParameter telephone = new OleDbParameter();
OleDbParameter fax = new OleDbParameter();
OleDbParameter name = new OleDbParameter();
OleDbParameter sourceAddress = new OleDbParameter();
OleDbParameter destAddress = new OleDbParameter();
OleDbParameter via1 = new OleDbParameter();
OleDbParameter via2 = new OleDbParameter();
OleDbParameter via3 = new OleDbParameter();
OleDbParameter priority = new OleDbParameter();
OleDbParameter ourReference = new OleDbParameter();

oleDbCommand.Parameters.Add(customerID);
oleDbCommand.Parameters.Add(date);
oleDbCommand.Parameters.Add(time);
oleDbCommand.Parameters.Add(telephone);
oleDbCommand.Parameters.Add(fax);
oleDbCommand.Parameters.Add(name);
oleDbCommand.Parameters.Add(sourceAddress);
oleDbCommand.Parameters.Add(destAddress);
oleDbCommand.Parameters.Add(via1);
oleDbCommand.Parameters.Add(via2);
oleDbCommand.Parameters.Add(via3);
oleDbCommand.Parameters.Add(priority);
oleDbCommand.Parameters.Add(ourReference);

customerID.Value = 4;
date.Value = "01/01/01";
time.Value = "01:01:01";
telephone.Value = 01010101;
fax.Value = 01010101;
name.Value = "test 4";
sourceAddress.Value = "test 4 source address";
destAddress.Value = "test 4 dest address";
via1.Value = "test 4 via 1";
via2.Value = "test 4 via 2";
via3.Value = "test 4 via 3";
priority.Value = 1;
ourReference.Value = "test 4 ref";

MessageBox.Show(oleDbCommand.CommandText.ToString());

OleDbDataAdapter oleDbDataAdapter = new OleDbDataAdapter(oleDbCommand);

oleDbCommand.CommandText = query;

oleDbConnection.Open();

oleDbCommand.ExecuteNonQuery();

Answer 1

字段date和time是reserved words for JET/Access，所以您应该将它们封装在方括号中。(这是语法错误消息的真正来源)

"INSERT INTO Customer (customerID, [date], [time], telephone, fax, name, " + 
"sourceAddress, destAddress, via1, via2, via3," + "priority, ourReference) VALUES " + 
"(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)"; 

当然，参数的数量应该匹配。(12个占位符与13个字段/参数，添加另一个占位符?)，但这将给出另一条错误消息，而不是所述的语法错误

Answer 2

你有13个参数，但只有12个？

Answer 3

正如其他人提到的，您的参数与占位符不同步，但是，如果您的CustomerID是一个自动编号，那么您可以在sql和参数列表中省略它。