gridview display + multiple where clause

Question

I have a gridview which should display only usernames based on the email written in textbox1 and textbox2. How can I do this? I bound the gridview to a sql data source and in tht, I used the where clause like

SELECT [Username] FROM [Users] WHERE (([Email] = @Email) AND ([Email] = @Email2))

Where control ID on email is textbox 1 and control ID of email2 is textbox 2. But the result is null. The gridview is not displaying anything.

Answer 1

SELECT [Username] FROM [Users] WHERE [Email] in (@Email, @Email2)

is the correct SELECT statement.

Alternatively, you could do

SELECT [Username] FROM [Users] WHERE (([Email] = @Email) OR ([Email] = @Email2))

(note the OR instead of AND )

The problem with your SELECT is that it retrieves the rows that are equal to both @Email and @Email2. You could test that by trying to set the same email value in both text boxes - that should bring some results.

Answer 2

您可能希望在WHERE子句中使用OR而不是AND。