Question

我是新手，目前我的代码部分出现问题，单击数据库中的按钮后会出现语法错误。

 private void button1_Click(object sender, EventArgs e)
    {
         FlightConn.Open();
        oleDbCmd.Connection = FlightConn;

        oleDbCmd.CommandText = "insert into tbl_flight (fld_PassengerName, fld_destination, fld_class, fld_date, fld_time) ('" +
        this.textBox1.Text + "', '" + this.textBox2.Text + "', '" + this.comboBox1.SelectedItem + "', '" + this.comboBox2.SelectedItem + "','" + this.dateTimePicker1.Value + "');";
        int temp = oleDbCmd.ExecuteNonQuery();

        if (temp > 0)
        {
            textBox1.Text = null;
            textBox2.Text = null;
            comboBox1.Text = null;
            comboBox2.Text = null;
            dateTimePicker1.Text = null; 


            MessageBox.Show("Record Successfully Added");
        }
        else
        {
            MessageBox.Show("Record Failed to Add");
        }
       FlightConn.Close();
    }

任何想法是什么问题？谢谢你的任何未来答案

Answer 1

您插入的查询缺少Values关键字。 Insert into tablename(field1,field2) values(value1,value2)

Answer 2

您的SQL命令缺少一个子句。您还应该使用参数化查询，而不是将纯文本值输入到查询中。它使查询更安全，因为您不必担心SQL注入。

改变这个：

oleDbCmd.CommandText = "insert into tbl_flight (fld_PassengerName, fld_destination, fld_class, fld_date, fld_time) ('" +
    this.textBox1.Text + "', '" + this.textBox2.Text + "', '" + this.comboBox1.SelectedItem + "', '" + this.comboBox2.SelectedItem + "','" + this.dateTimePicker1.Value + "');";

更像这样的事情：

oleDbCmd.CommandText = "insert into tbl_flight(fld_PassengerName, fld_destination, fld_class, fld_date, fld_time) values(@PassengerName, @Destination, @Class, @Date, @Time)";

List<OleDbParameter> args = new List<OleDbParameter>();
args.Add(new OleDbParameter("@PassengerName", textBox1.Text));
args.Add(new OleDbParameter("@Destination", textBox2.Text));
args.Add(new OleDbParameter("@Class", comboBox1.SelectedItem));
args.Add(new OleDbParameter("@Date", comboBox2.SelectedItem));
args.Add(new OleDbParameter("@Time", dateTimePicker1.Value));

oleDbCmd.Parameters.Add(args.ToArray());

Answer 3

您错过了指定“值”关键字..试试这个

oleDbCmd.CommandText = "insert into tbl_flight (fld_PassengerName, fld_destination, fld_class, fld_date, fld_time) values('" +
    this.textBox1.Text + "', '" + this.textBox2.Text + "', '" + this.comboBox1.SelectedItem + "', '" + this.comboBox2.SelectedItem + "','" + this.dateTimePicker1.Value + "');";

Answer 4

您的sql语句中似乎缺少＆＃34; VALUES＆＃34; 关键字

Answer 5

你的sql字符串必须是;

string.Format(@"INSERT INTO tbl_flight (fld_PassengerName, fld_destination, fld_class, fld_date, fld_time) 
                                        VALUES ('{0}', '{1}', '{2}', '{3}', '{4}', '{5}');",
                              this.textBox1.Text, this.textBox2.Text, this.comboBox1.SelectedItem,
                              this.comboBox2.SelectedItem, this.dateTimePicker1.Value);

INSERT到语句vb c中的语法错误＃

5 个答案: