Question

我正在尝试开发一个表单，用于在数据库中搜索输入的名称。保存选定的行，然后移动到下一行。但是当我再次搜索时，它会清除以前保存的行。

private void textBox1_TextChanged(object sender, EventArgs e)
    {
        DataView DV = new DataView(datatable);
        DV.RowFilter = string.Format("proName LIKE '%{0}%'", textBox1.Text);
        dataGridView1.DataSource = DV;
    }

    private void Form1_Load(object sender, EventArgs e)
    {

        OleDbCommand command = new OleDbCommand("select * FROM productDetails",connection);
        DataSet dataset = new DataSet();
        OleDbDataAdapter dataAdapter = new OleDbDataAdapter();
        connection.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Documents and Settings\Zimad\Desktop\project1.accdb";           
        connection.Open();
        dataAdapter.SelectCommand = command;
        dataAdapter.Fill(datatable);
        dataGridView1.DataSource = datatable;
        connection.Close();
        nRow = dataGridView1.CurrentCell.RowIndex;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        if (nRow < dataGridView1.RowCount)
        {
            dataGridView1.Rows[nRow].Selected = false;
            dataGridView1.Rows[++nRow].Selected = true;
        }
    }

button1用于保存选定的行。

Answer 1

@Fabio是对的。我在这里做的是我将搜索结果加载到文本框中，然后在dataGridView

中加载项目的信息

     private void textBox1_TextChanged(object sender, EventArgs e)
    {
        listBox1.Visible = true;

        connection.Open();

        OleDbCommand command = new OleDbCommand();
        command.Connection = connection;
        command.CommandText = "select * FROM ProductDetails";
        OleDbDataReader reader = command.ExecuteReader();

        listBox1.Items.Clear();

        while (reader.Read())
        {
            if (reader["proName"].ToString().Contains(textBox1.Text))
            {
                listBox1.Items.Add(reader["proName"].ToString());
            }

        }
        connection.Close();
    }

    private void button1_Click(object sender, EventArgs e)
    {

        connection.Open();

        OleDbCommand command = new OleDbCommand();
        command.Connection = connection;
        command.CommandText = "select * FROM ProductDetails";
        OleDbDataReader reader = command.ExecuteReader();

        while (reader.Read())
        {
            if (reader["proName"].ToString().Contains(textBox1.Text))
            {
                dataGridView1.Rows.Add();
                dataGridView1[0, 0].Value = reader["proName"].ToString();
            }

        }
        connection.Close();

    }

移动到dataGridView中的下一行

1 个答案: