VB.Net login form error

[dreamslanka]

api hadapu VB.Net aplication ekaka users la enter karana form ekedi add karana data SQL data base ekaka save wenawa.

so kawru hari same user name ekak apahu enter kaloth aluth ekak enter karanna kiyala message ekak ena widiyata hadanne kohomadA?

[blacknwhite]

api hadapu VB.Net aplication ekaka users la enter karana form ekedi add karana data SQL data base ekaka save wenawa.

so kawru hari same user name ekak apahu enter kaloth aluth ekak enter karanna kiyala message ekak ena widiyata hadanne kohomadA?


name eka daala button eka press kalama, ara database eke usernames ekath ekka meka match wenawada kiyala condition ekak danna.
name eka same nan message box ekak daala username textbox eka clear karanna.
name eka not same nan next step ekata yanna.