...
private Data data_ = new Data();
...
if(data_.str != "")
{
...
}
...
public class Data
{
name = "";
}
...
private Data data_ = new Data();
...
if(data_.str != null)
{
...
}
...
public class Data
{
name = "";
}
应该判断str.Length
...
private Data data_ = new Data();
...
if(data_.str.Length > 1)
{
...
}
...
public class Data
{
name = "";
}