使用 oledb 插入到 oracle db

Question

您好，我是一名学生，我们的教授要求我们做一个基本的 CRUD 程序。现在，我在 C# + mysql 中做了很多 CRUD 程序，但现在我们的教授让我们使用 oracle db，（忘记它是什么。像 10g XE 之类的）并说我们应该使用 oledb。我试图迁移我以前的 c# + mysql 代码，但显然它不起作用。我做了很多搜索，最终导致我这样做

private void button2_Click(object sender, EventArgs e)
    {
        string commandText = "insert into Procedures (procedureID,petID,visitDate,procedureType) values(:procedureID,:petID,:visitDate,:procedureType)";
        con = new OleDbConnection(connectionstring);    
        OleDbCommand cmd = new OleDbCommand(commandText, con);
        con.Open();

        dtpDate.Format = DateTimePickerFormat.Custom;
        dtpDate.CustomFormat = "dd-MMM-yy";

        cmd.Parameters.AddWithValue("procedureID", null);
        //i think this line above is the error. correct me if im wrong.
        //but how do you pass a null value to a foreign key in oracle?
        //in mysql i'd just set my primary key to autoincrement and I would
        //just pass a null value and it would automatically set a unique ID
        //but in oracle i cannot find autoincrement and i cannot set my primary
        //key to nullable. is this the error or did I do something else wrong?
        //is oracle's primary key set to autoincrement by default?

        cmd.Parameters.AddWithValue("petID", tbName.Text);
        cmd.Parameters.AddWithValue("visitDate", dtpDate.Text);
        cmd.Parameters.AddWithValue("procedureType", tbProcedure.Text);
        cmd.ExecuteNonQuery();

        OleDbDataAdapter da = new OleDbDataAdapter("select * from Procedures", con);
        DataSet ds = new DataSet();
        da.Fill(ds, "Procedures");
        dgvTable.DataSource = ds.Tables[0];
        con.Dispose();
    }

当我尝试插入数据时，它给了我一个“ORA-01008: not all variables bound”错误。

附：如果有帮助，我正在使用 MS Visual Studio 2013。

Answer 1

首先你需要创建一个如下所示的序列

CREATE SEQUENCE procedures_seq
   MINVALUE 1
   START WITH 1
   INCREMENT BY 1
   CACHE 20;

那么你的推荐文字会在下面：

string commandText = "insert into Procedures (procedureID,petID,visitDate,procedureType) values(procedures_seq.NEXTVAL,'" + tbName.Text + "','" + dtpDate.Text + "','" + tbProcedure.Text + "')";

Answer 2

你需要传递带有@前缀的参数。即@procedureID