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Microsoft Access 2010을 사용하여 DataGridView에 레코드를 표시하려고합니다.하지만 문제는 button1을 클릭 할 때마다 "ConnectionString 속성이 초기화되지 않았습니다. "Microsoft Access를 사용하여 DataGridView를 업데이트 할 때 오류가 발생했습니다.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Attendance_Generation_System
{
public partial class Take_attendance : Form
{
OleDbConnection conn = new OleDbConnection();
public Take_attendance()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
[email protected]"Provider = Microsoft.ACE.OLEDB.12.0; Data Source = F:\UNI WORK\7th Semester\Visual Programming\Database31.accdb; " + "User id = admin; " + "Password = "; ;
OleDbCommand cmd =new OleDbCommand("SELECT * FROM Attendancerecord");
OleDbDataAdapter add = new OleDbDataAdapter(cmd);
DataTable dt = new DataTable();
add.Fill(dt);
dataGridView1.DataSource=dt;
cmd.ExecuteNonQuery();
}
}
}