# vtkXMLMultiBLockDataReader and simple.XMLMultiBLockDataReader

**URL:** https://discourse.paraview.org/t/vtkxmlmultiblockdatareader-and-simple-xmlmultiblockdatareader/11485
**Category:** ParaView Support
**Created:** [February 24, 2023, 10:38am UTC](https://discourse.paraview.org/t/vtkxmlmultiblockdatareader-and-simple-xmlmultiblockdatareader/11485 "2023-02-24T10:38:04Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![4leaf321](https://discourse.paraview.org/user_avatar/discourse.paraview.org/4leaf321/32/10987_2.png) [@4leaf321](https://discourse.paraview.org/u/4leaf321)
#### Post date: [February 24, 2023, 10:38am UTC](https://discourse.paraview.org/t/vtkxmlmultiblockdatareader-and-simple-xmlmultiblockdatareader/11485/1 "2023-02-24T10:38:04Z")

</div>

Now I’m constructing my server for reading simulation result, result from LS Dyna d3plot.  
When I import D3PLOT in paraview and export to vtm file,  
file structure is as follows

fileName\_1.vtm (time-step1)  
fileName\_1/fileName\_0\_0\_0.vtu (block1)  
fileName\_1/fileName\_0\_1\_0.vtu (block2)  
fileName\_1/fileName\_0\_2\_0.vtu (block3)  
…  
fileName\_2.vtm (time-step2)  
fileName\_3.vtm (time-step3)  
fileName\_4.vtm (time-step4)  
…

In here, I want to open this file for paraview.simple/trame

so, i read them by using simple.XMLMultiBLockDataReader, and render as example07\_timeanimation.

now, I have one problem.  
There are so many “block” for each file,  
so i want to make drop-down button for choose block and show that and hideall others.

It is simple show and hide all, because i just use simple.ShowAll(view) and simple.ShowAll(view).  
But if i want to show only ones,  
because blockselector is not working for paraview.simple server envronment.  
How can i show and hide only chosen block?  
I can make block name list, but I cant make subsource(sub proxy?) for one block

Help me please… I spent time almost 2days…