为什么我的DataGridView中什么都没有显示？

Question

我正在尝试初始化DataGridView对象。 我所做的就是在不更改任何属性的情况下将对象添加到屏幕上。 当用户选择打开的面板时，我有运行的代码。 代码看起来像这样...

DataTable tbl = new DataTable();
string query = "SELECT viewfolder, status FROM Folders WHERE username = '" + Globals.usrName + "' ORDER BY viewfolder";

SqlConnection connect = new SqlConnection(@"Data Source=(LocalDB)\v11.0;" +
    @"AttachDbFilename=C:\Development\C-Sharp\LockItUp\Lockitup.mdf;Integrated Security=True");

SqlCommand cmd = new SqlCommand(query, connect);

connect.Open();
try
{
    SqlDataAdapter dAdapt = new SqlDataAdapter(cmd);
    dAdapt.Fill(tbl);
}
catch (Exception ex)
{
    MessageBox.Show(ex.Message);
    return;
}
connect.Close();

dataGridView1.DataSource = tbl;

那么，是否还需要添加其他代码或设置属性以使数据显示在网格上？ 谢谢您的帮助。

Answer 1

您可以尝试使用以下代码：

void FillData()
{

    using (SqlConnection c = new SqlConnection(
    @"Data Source=(LocalDB)\v11.0;" +
@"AttachDbFilename=C:\Development\C-Sharp\LockItUp\Lockitup.mdf;Integrated Security=True"))
    {
    c.Open();

           string query = "SELECT viewfolder, status FROM Folders WHERE username = '" + Globals.usrName + "' ORDER BY viewfolder";
    using (SqlDataAdapter a = new SqlDataAdapter(
        query , c))
    {
        DataTable tbl = new DataTable();
        a.Fill(tbl);
        dataGridView1.DataSource = tbl; 
    }
    }
}