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我正在將datagridview中單元格的內容移動到文本框中。但是，我似乎無法讓它工作。將用戶添加到數據庫按鈕我已經測試並且工作正常，它只是從數據網格視圖中選擇的。在Datagridview中選擇文本框中的行
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace TEST
{
public partial class AddUsers : Form
{
SqlConnection con = new SqlConnection(@"Data Source(LocalDB)\MSSQLLocalDB;AttachDbFilename=mydb;Integrated Security=True;Connect Timeout=30");
SqlCommand cmd;
SqlDataAdapter adapt;
int ID = 0;
public AddUsers()
{
InitializeComponent();
DisplayData();
}
private void selectRow(object sender, DataGridViewCellMouseEventArgs e)
{
ID = Convert.ToInt32(dataGridView1.Rows[e.RowIndex].Cells[0].Value.ToString());
textBox1.Text = dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();
textBox2.Text = dataGridView1.Rows[e.RowIndex].Cells[2].Value.ToString();
}
//Update Record
private void button2_Click(object sender, EventArgs e)
{
if (textBox1.Text != "" && textBox2.Text != "")
{
cmd = new SqlCommand("update tblLOGIN set [email protected],[email protected] where [email protected]", con);
con.Open();
cmd.Parameters.AddWithValue("@Id", ID);
cmd.Parameters.AddWithValue("@USERNAME", textBox1.Text);
cmd.Parameters.AddWithValue("@PASSWORD", textBox2.Text);
cmd.ExecuteNonQuery();
MessageBox.Show("Record Updated Successfully");
con.Close();
DisplayData();
ClearData();
}
else
{
MessageBox.Show("Please Select Record to Update");
}
}
//New User
private void button1_Click(object sender, EventArgs e)
{
if (textBox1.Text != "" && textBox2.Text != "")
{
cmd = new SqlCommand("insert into tblLOGIN(USERNAME,PASSWORD) values(@USERNAME,@PASSWORD)", con);
con.Open();
cmd.Parameters.AddWithValue("@USERNAME", textBox1.Text);
cmd.Parameters.AddWithValue("@PASSWORD", textBox2.Text);
cmd.ExecuteNonQuery();
con.Close();
MessageBox.Show("User created successfully");
DisplayData();
ClearData();
}
else
{
MessageBox.Show("Please enter username and password");
}
}
private void DisplayData()
{
con.Open();
DataTable dt = new DataTable();
adapt = new SqlDataAdapter("select * from tblLOGIN", con);
adapt.Fill(dt);
dataGridView1.DataSource = dt;
con.Close();
}
private void ClearData()
{
textBox1.Text = "";
textBox2.Text = "";
ID = 0;
}
//Delete user
private void button3_Click(object sender, EventArgs e)
{
if (ID != 0)
{
cmd = new SqlCommand("delete tblLOGIN where [email protected]", con);
con.Open();
cmd.Parameters.AddWithValue("@id", ID);
cmd.ExecuteNonQuery();
con.Close();
MessageBox.Show("Record Deleted Successfully!");
DisplayData();
ClearData();
}
else
{
MessageBox.Show("Please Select Record to Delete");
}
}
private void AddUsers_Load(object sender, EventArgs e)
{
this.tblLOGINTableAdapter.Fill(this.usersDataSet.tblLOGIN);
}
private void button4_Click(object sender, EventArgs e)
{
AuthenicationForm ss = new AuthenicationForm();
this.Close();
ss.Show();
}
}
}