使用sql数据读取器时检查null

Question

I'm reading data using sql command and sql reader like

using (var reader = command.ExecuteReader())
{
   if (reader.Read())
   {
         // how can I check is reader["Name"] != null?
        myObj.Name = (string)reader["Name"];
   }
}

Answer 1

You can use IsDBNull

if(!reader.IsDBNull("Name")){
    myObj.Name = (string)reader["Name"];
}

Unless you can do as:

if (reader["Name"] != DBNull.Value)
{
   myObj.Name = (string)reader["Name"];
}

OR

myObj.Name  = (reader.IsDBNull("Name")? "": sqlreader.GetString(indexofName));