Aktualisierung Der Datenbank Mit Datagridview

Kann ich hinzufügen, Bearbeiten, löschen-Datenbank mit listbox. Aber ich will es tun, mit DatagridView ich schon binden Sie es an meiner Datenbank.

Wie muss ich hinzufügen,Bearbeiten,löschen, aktualisieren meiner Datenbank in datagridview die Verwendung von codes?

Diese sind meine codes:

namespace Icabales.Homer
{
    public partial class Form1 : Form
{
    SqlConnection cn = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=c:\users\homer\documents\visual studio 2010\Projects\Icabales.Homer\Icabales.Homer\Database1.mdf;Integrated Security=True;User Instance=True");
    SqlCommand cmd = new SqlCommand();
    SqlDataReader dr;
    SqlDataAdapter da;
    DataTable dt = new DataTable();
    public Form1()
    {
        InitializeComponent();
    }
    private void bindgrid()
    {
        string command = "select * from info";
        da = new SqlDataAdapter(command, cn);
        da.Fill(dt);
        dataGridView1.DataSource = dt;
    }
    private void Form1_Load(object sender, EventArgs e)
    {
        //TODO: This line of code loads data into the 'database1DataSet.info' table. You can move, or remove it, as needed.
        this.infoTableAdapter.Fill(this.database1DataSet.info);
        cmd.Connection = cn;
        loadlist();
        bindgrid();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        if (txtid.Text != "" & txtname.Text != "")
        {
            cn.Open();
            cmd.CommandText = "insert into info (id,name) values ('" + txtid.Text + "' , '" + txtname.Text + "')";
            cmd.ExecuteNonQuery();
            cmd.Clone();
            MessageBox.Show("Record Inserted");
            cn.Close();
            txtid.Text = "";
            txtname.Text = "";
            loadlist();
        }
    }
    private void loadlist()
    {
        listBox1.Items.Clear();
        listBox2.Items.Clear();
        cn.Open();
        cmd.CommandText = "select * from info";
        dr = cmd.ExecuteReader();
        if (dr.HasRows)
        {
            while (dr.Read())
            {
                listBox1.Items.Add(dr[0].ToString());
                listBox2.Items.Add(dr[1].ToString());
            }
        }
        cn.Close();             
    }

    private void listBox2_SelectedIndexChanged(object sender, EventArgs e)
    {
        ListBox l = sender as ListBox;
        if (l.SelectedIndex != -1)
        {
            listBox1.SelectedIndex = l.SelectedIndex;
            listBox2.SelectedIndex = l.SelectedIndex;
            txtid.Text = listBox1.SelectedItem.ToString();
            txtname.Text = listBox2.SelectedItem.ToString();
        }

    }

    private void button2_Click(object sender, EventArgs e)
    {
        if (txtid.Text != "" & txtname.Text != "")
        {
            cn.Open();
            cmd.CommandText = "delete from info where id = '"+txtid.Text+"'and name = '"+txtname.Text+"'";
            cmd.ExecuteNonQuery();
            cn.Close();
            MessageBox.Show("Record Deleted");
            loadlist();
            txtid.Text = "";
            txtname.Text = "";
        }
    }

    private void button3_Click(object sender, EventArgs e)
    {
        if (txtid.Text != "" & txtname.Text != "" & listBox1.SelectedIndex != -1)
        {
            cn.Open();
            cmd.CommandText = "update info set id='"+txtid.Text+"',name='"+txtname.Text+"'where id='"+listBox1.SelectedItem.ToString()+"' and name='"+listBox2.SelectedItem.ToString()+"'";
            cmd.ExecuteNonQuery();
            cn.Close();
            MessageBox.Show("Record Updated");
            loadlist();
            txtid.Text = "";
            txtname.Text = "";
        }
    }
}

}

InformationsquelleAutor HOmer | 2012-12-28

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