C＃ - 如何筛选使用组合框在DataGridView [英] C# - how to filter the DataGridView using ComboBox

问题描述

我需要过滤我的 DataGridView的使用组合框

下面是我的显示代码

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数据：

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

我组合框名为 cboFilter ，如果我改变了指数登录，将显示在 dataGridView1 仅在登录

I have ComboBox named cboFilter and if I changed the index to LOGIN the data that will show on the dataGridView1 is only LOGINs.

推荐答案

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;
}

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