Hi, I am trying to create a simple PLM page, where i am facing issue in dependent selectbox, where value are populating after i click submit. Request help to check where i am going wrong. import streamlit as st import pandas as pd st.set_page_config(layout="wide") if "style_data" not in st.ses…

Similar question and similar answer: don’t use a form for that.

[page] not able select dropdown for product and class

That is because st.session_state.product is an empty string. So the selectbox options list is empty, which automatically disables it.

after commenting, still i am not able select. import streamlit as st import pandas as pd st.set_page_config(layout="wide") if "style_data" not in st.session_state: st.session_state.style_data = [] # if "product" not in st.session_state: # st.session_state.product = None # if "product_c…

@Goyo , Initially, i have created without form it was working fine. Now modified the code and included under form is it because of that.

Yes, because when you modify a widget, the updated return value is not available until the app reruns or in the callback. But, if the widget is inside a form, there will be no rerun and it cannot have a callback, so you cannot have the updated values until the submit button is pressed. If you want …

@Goyo , Got it. But is there any other way, i can achieve it. Because once i get the input from user. i need display the user input into table (multiple records) and save button to insert the data to the table.

Another way to achieve what? You don’t need a form in order to get the input from the user.

@Goyo , Form allows me select the values from dropdown and once i submit i displaying the input row in the table. [data] if don’t use form, it rerun’s and unable to display in the table.

I don’t understand why a rerun would prevent you from displaying the table. The data is still there in st.session_state.style_data, IIUC.

Streamlit selectbox

Using Streamlit

Dinesh_N January 26, 2024, 5:00am 12

@Goyo, Thanks for response.

i found similar question asked.

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Streamlit selectbox

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