how to validate a form before clicking button

Question

i am having textbox checkbox and after entering values the button should become clickable before that it should not go to next page.how to do that and i have addTextChangedListener in that. in textchange and aftertextchange

Ramesh Maruthi · Answer

You can use CustomValidator fo this. Check this code.. ErrorMessage=Please fill TextBox >* function CheckBoxValidation(oSrouce args) { var myCheckBox = document.getElementById(' '); var myTextBox = document.getElementById(' '); if(myCheckBox.checked) { if(myTextBox.value==) args.IsValid = false; else args.IsValid = true; } }

Nandhini Jayachandran · Answer

The validations has to be done before clicking button

Sivaranjani Sundarraj · Answer

plz refEr this link https://sites.google.com/site/khetiyachintan/sample-example/edit-text-validation-example http://tausiq.wordpress.com/2013/01/19/android-input-field-validation/ for checkbox validation chkIos = ( CheckBox ) findViewById ( R . id . chkIos ); chkAndroid = ( CheckBox ) findViewById ( R . id . chkAndroid ); chkWindows = ( CheckBox ) findViewById ( R . id . chkWindows ); btnDisplay = ( Button ) findViewById ( R . id . btnDisplay ); btnDisplay . setOnClickListener ( new OnClickListener () { //Run when button is clicked @Override public void onClick ( View v ) { if ( chkIos . isChecked () || chkAndroid . isChecked () || chkWindows . isChecked ()){ //do some validation } } }); }