如何在数据表vb.net中查找所有空项

' 连接数据库
Dim connectionString As String = "YourConnectionString"
Using connection As New SqlConnection(connectionString)
    connection.Open()

    ' 构建查询语句
    Dim tableName As String = "myTable"
    Dim fieldName As String = "myField"
    Dim query As String = $"SELECT * FROM {tableName} WHERE {fieldName} IS NULL"

    ' 执行查询
    Using command As New SqlCommand(query, connection)
        Using reader As SqlDataReader = command.ExecuteReader()
            ' 处理查询结果
            While reader.Read()
                ' 获取空项数据
                Dim id As Integer = reader.GetInt32(0) ' 假设第一列是ID字段
                Dim otherField As String = reader.GetString(1) ' 假设第二列是其他字段

                ' 进一步处理或显示数据
                Console.WriteLine($"空项ID: {id}, 其他字段值: {otherField}")
            End While
        End Using
    End Using
End Using