public DataTable QueryPhotos(string usersID)
{
DataTable dt = new DataTable();
string str = "SELECT * FROM photos where usersID='" + usersID + "' order by isDir asc";
DataSet ds = new DataSet();
ds=DBOperation.GetDataSet(DBOperation.CONN_STRING_NON_DTC, CommandType.Text, str, null); dt = ds.Tables[0];
return dt;
} 未将对象引用设置到对象的实例。
各位大侠求解,我这样写哪里错了
{
DataTable dt = new DataTable();
string str = "SELECT * FROM photos where usersID='" + usersID + "' order by isDir asc";
DataSet ds = new DataSet();
ds=DBOperation.GetDataSet(DBOperation.CONN_STRING_NON_DTC, CommandType.Text, str, null); dt = ds.Tables[0];
return dt;
} 未将对象引用设置到对象的实例。
各位大侠求解,我这样写哪里错了
if(ds!=null && ds.Tables.Count>0)
dt=ds.Tables[0];
{
ds=DBOperation.GetDataSet(DBOperation.CONN_STRING_NON_DTC, CommandType.Text, str, null);
dt = ds.Tables[0];
}