Question

c# 读取图片参数无效

SqlConnection sc = new SqlConnection("Data Source=PC-20101117ODAA\\SQLEXPRESS;DataBase=LiXiKS;pwd=sa;uid=sa");
sc.Open();
if (sc.State == ConnectionState.Open)
{
MessageBox.Show("ok");
}
else
{
MessageBox.Show("NO");
}
SqlCommand scd = new SqlCommand("select pic from StudentName where nostudent='"+this.label1.Text+"'",sc);
byte[] bytt = (byte[])scd.ExecuteScalar();
MemoryStream ms = new MemoryStream(bytt);
this.pictureBox1.Image = Image.FromStream(ms);
VS提示我ms参数无效，数据库里存有二进制图片呀

Answer 1

....
byte[] bytt = (byte[])scd.ExecuteScalar();
if (bytt != null)
{
MemoryStream ms = new MemoryStream(bytt);
this.pictureBox1.Image = Image.FromStream(ms);
}
else
MessageBox.Show("未查询到图片");

Answer 2

我也遇到了。。。。。是SElECT语句的问题吗。。。。。。