Hi Zhang,
If you want to have different contents in the different RadTileViewItem TileStates you should use the RadFluidContentControl. You can read more about it here and here and you can see a demo with a RadTileView and a FluidContentControl here.
I've also attached a sample project so could you please examine it and if you have more questions feel free to ask.
Greetings,
Zarko
the Telerik team
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