private void btnTest_Click(object sender, EventArgs e)
{
var servername = txtServer.Text.Trim();
var uid = txtUser.Text.Trim();
var pwd = txtPwd.Text.Trim();
var constr = service.GetConnectioning(servername, uid, pwd);
if (service.ConnectionTest(constr))
{
MessageBox.Show("连接数据库成功！");
comboBox1.DataSource = service.GetDBNameList(constr);
}
else
{
MessageBox.Show("连接数据库失败！");
}
}