Update app.py

app.py

@@ -64,12 +64,16 @@ if uploaded_files:
     
     selected_values = st.multiselect("เลือกค่าจากคอลัมน์", df.columns)
 
-    convert_to_float = st.checkbox("convert columns to float", value=False)
+    
+    convert_to_String = st.checkbox("convert columns to String", value=False)
+    convert_to_float = st.checkbox("convert columns to Float", value=False)
+    if convert_to_String:
+        df[selected_values] = df[selected_values].astype(str)
     if convert_to_float:
         df[selected_values] = df[selected_values].astype(float)
 
     
-
+    
 
     
     show_dataframes = st.checkbox("Show DataFrames", value=True)