Validate Cascading DropDownList (One dependent on another) using JavaScript

Question

Needing help to validate multiple dropdown lists I am needing to figure out how I can create a C code that allows this functionExDropDownList1 select option1  then DropDownList2 DropDownList4 DropDownList7 will be required to be filled outUsing Button click will make a pop up alert window to tell users that they need to fill out a certain dropdownlist if that dropdown list is blank

Mudassar · Accepted Answer

ReferValidate multiple ASPNet TextBoxes using JavaScript and List the empty TextBoxes in alert box

Shaiwal · Answer

Refer this codeHTMLltdiv id34Div134gt        ltaspDropDownList ID34DropDownList134 runat34server34gt        ltaspListItemgtltaspListItemgt            ltaspListItemgtOption1ltaspListItemgt            ltaspListItemgtOption2ltaspListItemgt            ltaspListItemgtOption3ltaspListItemgt        ltaspDropDownListgt        ltbr gt        ltbr gt        ltaspDropDownList ID34DropDownList234 runat34server34gt            ltaspListItemgtSelect CountryltaspListItemgt            ltaspListItemgtIndialtaspListItemgt            ltaspListItemgtUSAltaspListItemgt            ltaspListItemgtAustralialtaspListItemgt        ltaspDropDownListgt        ltbr gt        ltbr gt        ltaspDropDownList ID34DropDownList334 runat34server34gt            ltaspListItemgtSelect CityltaspListItemgt            ltaspList

compstuden · Answer

How can I make it where if textbox length is not 0 then do not alert message and submit  Would I use the   function Validate                                            if documentgetElementById34ltddlFinalActionClientIDgt34selectedIndex  3434                                    alert39Must Enter Final Action Taken39                    return false                                                if documentgetElementById34ltddlFinalActionClientIDgt34selectedIndex  34134  documentgetElementByID34ltTextBox5ClientIDgt34 value gt 0                                    alert39Must Enter Comment39                    return false                                                                                   return true           end validate  I am trying to make alert box not show up when value in TextBox5 is greater than 0 but alert box keeps showing up when value is  greater than 0

Shaiwal · Answer

Hi compstudenThis is your new requirement According to forums rule you can not ask more than one question in your single ThreadFirst of all you should mark the reply replies if multiple as answer if it helped you then  ask new question for your new requirement

Validate Cascading DropDownList (One dependent on another) using JavaScript

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