update Textinput value based on selected value of list box

[JackWu1123]

Hi, 

I generated a text input box (Textinput1) and a list box (Listbox1). 

The Listbox1 will show a batch of data which was filtered in the source database based on the input of Textinput1.

What I want is to set the Textinput1 value to the selected value in Listbox1. I have tried to set Textinput1 default value as ListBox1.Selected.Material. It works in another textinput2 But not work in textinput1. Here is the error message.

do anyone know how to set the textinput1 value to the selected value in the list box which was filtered based on textinput1 itself? 

Thanks!

[mdevaney]

@JackWu1123 

Your question was:  "Do anyone know how to set the textinput1 value to the selected value in the list box which was filtered based on textinput1 itself? "

This is the definition of a circular reference.  You cannot:

• Use control A 
• To set control B
• Which sets control A

You many only:

• Use control A
• To set control B
• (Which optionally sets control C)

Note: A, B, C are made up control names for the purpose of a basic example

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[JackWu1123 · Accepted solution]

Hi, 

This has been resolved when I create a variable to store the item which is selected in list box and set the input box default as the variable. 

Thanks!