我有以下代码来获取对象中的表数据,但我收到错误,我不知道我错在哪里。
public List<ModelGetEmployeeList> GetEmployeeList()
{
List<ModelGetEmployeeList> empList = new List<ModelGetEmployeeList>();
DataTable dt = new DataTable();
string q = "select uid,fname,lname from nworksuser;";
MySqlCommand cmd = new MySqlCommand(q,conn);
MySqlDataAdapter adapter = new MySqlDataAdapter(cmd); ;
conn.Open();
adapter.Fill(dt);
conn.Close();
for (int i = 0; i < dt.Rows.Count; i++)
{
foreach (DataRow row in dt.Rows)
{
//Here I am getting following error
// Index was out of range. Must be non-negative and less than the size of the collection.
empList[i].uid = row["uid"].ToString();
empList[i].fname = row["fname"].ToString();
empList[i].lname = row["lname"].ToString();
}
}
return empList;
}
ModelGetEmployeeList Class就是这样 -
public class ModelGetEmployeeList
{
public string uid { get; set; }
public string fname { get; set; }
public string lname { get; set; }
}
答案 0 :(得分:0)
因为empList
为空。
将ModelGetEmployeeList
添加到列表中的正确方法是:
ModelGetEmployeeList employee;
foreach (DataRow row in dt.Rows)
{
employee = new ModelGetEmployeeList();
employee.uid = row["uid"].ToString();
employee.fname = row["fname"].ToString();
employee.lname = row["lname"].ToString();
empList.Add(employee);
}