Question

我需要使用DataGridView

过滤ComboBox的帮助

这是我的显示代码

cm = new SqlCommand();
cn = new SqlConnection(lgn.connections);
cn.Open();
cm.Connection = cn;
query = "Select * from Trails";
cm.CommandText = query;
SqlDataAdapter dar = new SqlDataAdapter(cm);
DataTable dt = new DataTable();
dar.Fill(dt);
dataGridView1.DataSource = dt;

dataGridView1.Columns[0].Width = 0;
dataGridView1.Columns[1].Width = 130;
dataGridView1.Columns[2].Width = 100;
dataGridView1.Columns[3].Width = 360;
dataGridView1.Columns[4].Width = 130;
this.dataGridView1.Columns[0].Visible = false;

RAW DATA：

ID  | TRANSACTYPE | DESCRIPTION | AUTHORIZED BY
-----------------------------------------------
1   | LOGIN       | blah blah   | BOB
2   | LOGOUT      | blah blah   | BOB
3   | LOGIN       | blah blah   | TIM
4   | LOGOUT      | blah blah   | KURT

我ComboBox名为cboFilter，如果我将索引更改为LOGIN，则dataGridView1上显示的数据仅为LOGIN。

Answer 1

试试这个：

DataTable dt = new DataTable();

private void cboFilter_SelectedIndexChanged(object sender, EventArgs e)
{
    DataView dv = dt.DefaultView;
    dv.RowFilter = string.Format("TRANSACTYPE  LIKE '%{0}%'", cboFilter.SelectedItem.ToString());
    dataGridView1.DataSource = dv;
}

Answer 2

如果像我一样需要DataGridView数据源始终是DataTable。

            DataTable dt = (DataTable)dgv.DataSource;
            dgv.DataSource = dt.Select("IsActive = 1").CopyToDataTable();

如何使用ComboBox过滤DataGridView

2 个答案: