The machine crashed. After I installed it again, I had no software. I will wait until tomorrow. It's okay today :)
The last time I talked about the interface, I should pay attention to it. Next I will talk about the interface. The efficiency may be the reason why I used the simulator. I always feel that the smartphone refresh is too slow, for example, it may take a while to draw a few lable textfields. If you encounter a ComboBox, it will be a disaster. If you want to fill the ComboBox during initialization, it will take a while, so you are forced to be helpless, after initialization, let's see it again (as mentioned last time ).
Because smartphone uses the Compact framework, it looks similar. net Framework is somewhat changed here, and many method attributes disappear. For example, bind a data source to ComboBox. datasource = ?, Databind (); just fine. Here, databind () is canceled. It feels that the data is directly filled with datasource after the data source is specified, and even if the data source content changes in the future, there is no way to get rid of anything in ComboBox. If you want to update it? I didn't find a good solution. I used datasource = NULL, and then re-bound it to the data source. However, the problem is that it is refreshing, not refreshing, but adding a data refresh. It will be slow, so it will be even slower. I will use the trick to fill in the visible = false; after the data is added, it is changed. It seems a lot faster. But this is not authentic, because in. net Framework has a way to prevent him from refreshing updates, but CF does not. Someone has implemented the method on CF that does not need to refresh the screen, and forgot where to put it, after the machine is created, find the machine and send it again.
The feeling is that binding data sources is far faster than filling items. Although it will be a little difficult to handle in the future, it is obvious that the initialization speed is different.
I don't know how many things I 've ever forgotten. I can't remember it when I learn it later.
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