dr.read()
string path = dr["ImageUrl"].ToString();
System.Drawing.Image oImage = System.Drawing.Image.FromFile(path);
会出现“在没有任何数据时进行无效的读取”的错误如果改为
if (dr.Read())
{
string path = dr["ImageUrl"].ToString();
}
System.Drawing.Image oImage = System.Drawing.Image.FromFile(path);
------------
就会出现FromFile(path)的path没定义。请问大大们如何把里面参数取出来?
string path = dr["ImageUrl"].ToString();
System.Drawing.Image oImage = System.Drawing.Image.FromFile(path);
会出现“在没有任何数据时进行无效的读取”的错误如果改为
if (dr.Read())
{
string path = dr["ImageUrl"].ToString();
}
System.Drawing.Image oImage = System.Drawing.Image.FromFile(path);
------------
就会出现FromFile(path)的path没定义。请问大大们如何把里面参数取出来?
if (dr.Read())
{
path = dr["ImageUrl"].ToString();
}
System.Drawing.Image oImage = System.Drawing.Image.FromFile(path);
if (dr.Read())
{
path = dr["ImageUrl"].ToString();
} if(!string.IsNullOrEmpty(path))
System.Drawing.Image oImage = System.Drawing.Image.FromFile(path);
if (dr.Read())
{
path = dr["ImageUrl"].ToString();
}
System.Drawing.Image oImage = System.Drawing.Image.FromFile(path);
你看看SQL语句,直接执行返回什么内容
或将相关代码也贴出来帮你看看