C# 插入/删除数据后，datagridview不显示插入的项

DataGridView.Refresh（）

是图形刷新，而不是数据刷新。 将DatagridView重新绑定到源

private void btndelete_Click(object sender, EventArgs e)
{
    if (txtserch.Text == "")
    {
        MessageBox.Show("Enter Customer name to delete");
    }
    else
    {
        l1.conn();
        SqlCommand cmd = new SqlCommand("delete from CUSTOMER where NAME='" + txtserch.Text + "'", l1.connection);
        int a = cmd.ExecuteNonQuery();
        if (a == 1)
        {
            MessageBox.Show("Deleted Sucessfully");
            dataGridView1.Refresh();
            dataGridView1.RefreshEdit();
            dataGridView1.Update();
            txtserch.Text = "";
        }
        else
        {
            MessageBox.Show("Customer Not Exist");
            txtserch.Text = "";
        }
    }
}

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为了刷新网格，请重新绑定它

DataGridView dataGridView1 = new DataGridView();
dataGridView1.DataSource = source;

// Update Data in src1

dataGridView1.DataSource = null;
dataGridView1.DataSource = source;

这里ds是您提供给网格的数据源

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有关详细信息，请参阅此

如果要在编辑/删除/更新操作后将数据绑定到Gridview，则需要在下面的行代码中写入

MyGridView.DataSource = ds;
MyGridView.DataBind();

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亲爱的，你必须重新绑定网格

GridviewName.DataSource = ds;// retrieve the details and store in ds
GridViewName.DataBind();