only three email domain accept

Question

In my registration form there is field to enter emailid of member i want to restrinct user so that he would able to enter to only three domain name like gmail hotmail yahoo like this emailids Is it possible pLease give me solution

dharmendr · Accepted Answer

Hi KALEEMI have made one sample that fullfill your requirementHTMLlthtml xmlns34httpwwww3org1999xhtml34gtlthead runat34server34gt    lttitlegtlttitlegtltheadgtltbodygt    ltform id34form134 runat34server34gt    ltdivgt        lttablegt            lttrgt                lttdgt                    Email                lttdgt                lttdgt                    ltaspTextBox runat34server34 ID34txtEmail34 gt                    ltaspRequiredFieldValidator ID34rfvEmail34 runat34server34 ControlToValidate34txtEmail34                        ErrorMessage34Required34 ValidationGroup34G134gtltaspRequiredFieldValidatorgt                    ltaspRegularExpressionValidator ErrorMessage34Invalid Email34 ControlToValidate34txtEmail34                        runat34server34 ValidationExpression34azAZ09gmai

only three email domain accept

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