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打印出的sql 在数据里直接执行能查出数据吧,看看userName是什么类型是不是CHAR?这种会自动多出空格
[quote=引用 8 楼 qq_36617490 的回复:] [quote=引用 7 楼 大西瓜一块五一斤♏ 的回复:]这样执行看是不是还是0?Dim sql As String = "select count(1) from userinfo where userName = '" & user & "'" comm = New MySqlCommand(sql, con) Dim count As Integer = comm.ExecuteScalar()
[quote=引用 7 楼 大西瓜一块五一斤♏ 的回复:]这样执行看是不是还是0?Dim sql As String = "select count(1) from userinfo where userName = '" & user & "'" comm = New MySqlCommand(sql, con) Dim count As Integer = comm.ExecuteScalar()
这样执行看是不是还是0?Dim sql As String = "select count(1) from userinfo where userName = '" & user & "'" comm = New MySqlCommand(sql, con) Dim count As Integer = comm.ExecuteScalar()
Dim sql As String = "select count(1) from userinfo where userName = '" & user & "'"
comm = New MySqlCommand(sql, con)
Dim count As Integer = comm.ExecuteScalar()
这样执行看是不是还是0?