C # listview flicker load data-CodePudding

If the UI is the main thread to load will not flicker, put the code through an authorized load data into the child thread will be flashing, I am a custom controls, also USES the double caching mechanisms such as online said, also tried beginupdata method, are useless, do not know to have bosses to know why, and loading before 9 rows of data not flashing, flashing began from the first ten lines in question,

CodePudding user response:

Modified double cache TreeView, a list of don't know work, don't give it a try, the TreeView flash

 
Public class ListViewEx: ListView 
{
Protected override void OnHandleCreated (EventArgs e) 
{
SendMessage (this Handle, TVM_SETEXTENDEDSTYLE, IntPtr TVS_EX_DOUBLEBUFFER, IntPtr TVS_EX_DOUBLEBUFFER); 
Base. OnHandleCreated (e); 
} 
Private const int TVM_SETEXTENDEDSTYLE=0 x1100 + 44; 
Private const int TVM_GETEXTENDEDSTYLE=0 x1100 + 45; 
Private const int TVS_EX_DOUBLEBUFFER=0 x0004; 
[DllImport (" user32. DLL)] 
Private static extern IntPtr SendMessage (IntPtr hWnd, int MSG, IntPtr wp, IntPtr lp); 
}

CodePudding user response:

reference 1st floor desperaso response:

modify the double cache TreeView, I don't know the list don't work, don't give it a try, the TreeView flash

 
Public class ListViewEx: ListView 
{
Protected override void OnHandleCreated (EventArgs e) 
{
SendMessage (this Handle, TVM_SETEXTENDEDSTYLE, IntPtr TVS_EX_DOUBLEBUFFER, IntPtr TVS_EX_DOUBLEBUFFER); 
Base. OnHandleCreated (e); 
} 
Private const int TVM_SETEXTENDEDSTYLE=0 x1100 + 44; 
Private const int TVM_GETEXTENDEDSTYLE=0 x1100 + 45; 
Private const int TVS_EX_DOUBLEBUFFER=0 x0004; 
[DllImport (" user32. DLL)] 
Private static extern IntPtr SendMessage (IntPtr hWnd, int MSG, IntPtr wp, IntPtr lp); 
}

You mean double cache is only applicable to the treeview?

CodePudding user response:

The

reference autumn, maple falls on the second floor response:

what do you mean double cache only apply treeview?

ListView tried? Have the effect?

CodePudding user response:

Listview virtual loading

CodePudding user response:

Used double cache didn't encounter this problem, or your code where there is a problem, you can post up code

CodePudding user response:

Don't need to bother, before update with a listView. SuspendLayout layout (), and update is completed with a listView. ResumeLayout () to restore the layout is ok

CodePudding user response:

Double buffer should be,