如何文本字段值插入到數據庫在C＃以下代碼

Question

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Text; 
using System.Windows.Forms; 
using System.Data.OleDb; 
using System.Data.Odbc; 

namespace Username 
{ 
    public partial class Form2 : Form 
    { 
     public Form2() 
     { 
      InitializeComponent(); 
     } 

     private void textBox1_TextChanged(object sender, EventArgs e) 
     { 

     } 

     private void textBox2_TextChanged(object sender, EventArgs e) 
     { 

     } 

     private void textBox3_TextChanged(object sender, EventArgs e) 
     { 

     } 

     private void dateTimePicker1_ValueChanged(object sender, EventArgs e) 
     { 

     } 

     private void button1_Click(object sender, EventArgs e) 
     { 
      if (textBox1.Text == "" && textBox2.Text == "" && textBox3.Text == "") 
       MessageBox.Show("Plz Specify the UserName & Password","ERROR",MessageBoxButtons.OKCancel,MessageBoxIcon.Error); 
      else if (textBox2.Text == "" && textBox3.Text == "") 
       MessageBox.Show("Plz Specify the Password", "ERROR", MessageBoxButtons.OKCancel, MessageBoxIcon.Error); 
      else if (textBox3.Text == "") 
       MessageBox.Show("Plz RE Enter the Password", "ERROR", MessageBoxButtons.OKCancel, MessageBoxIcon.Error); 
      else 
      { 
       string connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\Samples\\login.mdb"; 
       String uname, pass; 
       uname = textBox1.Text; 
       //System.Windows.Forms.MessageBox.Show(uname); 
       pass = textBox2.Text; 
       OleDbConnection myConnection = new OleDbConnection(connectionString); 
       myConnection.Open(); 
       int i=107; 
       string query = "insert into EMPLOYEE_TABLE (ID,UserName,Password) VALUES (118,@uname,@pass)"; 

       //string query = "insert into LOGIN_TABLE (ID,UserName,Password) VALUES (i,'uname',' pass')"; 
       i++; 

       OleDbCommand myCommand = new OleDbCommand(); 
       myCommand.CommandText = query; 
       myCommand.Connection = myConnection; 
       myCommand.ExecuteNonQuery(); 
       myConnection.Close(); 


       System.Windows.Forms.MessageBox.Show("User Account Succefully Created", "Caption", MessageBoxButtons.OKCancel, MessageBoxIcon.Information); 

      } 
     } 
    } 
} 

Answer 1

就快，但需要填寫您在查詢創建的參數：

OleDbCommand myCommand = new OleDbCommand(); 
myCommand.CommandText = query; 

//TODO: Review the datatypes and lengths for these parameters 
OleDbParameter myParm = myCommand.Parameters.Add("@uname", OleDbType.VarChar, 50); 
myParm.Value = textBox1.Text; 

myParm = myCommand.Parameters.Add("@pass", OleDbType.VarChar, 50); 
myParm.Value = textBox2.Text; 

myConnection.Open(); 
myCommand.ExecuteNonQuery(); 
myConnection.Close(); 

更多見this MSDN article有關命令參數的信息。