Web Notes

SQL Server offers a lot of system views which allow to get information about each instance without interfering in system tables. All those system views are located in hidden system datadabase name 'Resource'. All system views can be divided into at least two groups: Structure views - which storing information about SQLSERVER properties and custom structure, and begins with schema INFORMATIN_SCHEMA.* . (compilant with ISO) Dynamic views - storing information at runtime from last time instance starts; this begins with sys.dm_* When we need to get information about executed connection in the all current opened session we can query to sys.dm_exec_connections. In this view we see two very important columns: session_id: represent the IDs of all current opened session; note that session ID is presented in each query tab in Managment Studio (ex. 52). most_recent_sql_handle: a handle to the most recent executed query for single session ID. Now assume that we want to preview

In MS SQL Server Managment Studio we can connect to any instance by using TCP/IP protocol. To do this we can use the following syntax: tcp: server_name\instance, port . For example: local instance:   tcp: .\R2,51550 remote instance: tcp: 192.168.11.5\R2,999 local alias: tcp: .\alias,51550

Sometimes solutiona that we create stores data from external suppliers. These data is stored in database and than presents to end-user. The problem occured when our suppliers user XML basen technology to send data package to us.  The  XML standard do not allow using some special characters in text (node attribute or value) so each occurance of special characters encoded. Each of us should know that and try do decode those entities before wtiring it to database and/or presents to user. But in real many thing may go wrong and in some rows of our product database these signs may appear. When You recognize the problem You can do three things but only two of them are correct. The first idea ( wrong ) is the attempt to create a CLR stored procedure or function with the System.Web.HttpUtility.HtmlDecode function. The problem is that You can`t add reference to System.Web in CLR projects! So this idea can not be executed. Second idea is to create a stand alone console application and impl

Sometimes it`s easier to reaload only part of the website witout reloading whole page. Thanks to AJAX technology such aproach is possible and easy to code. Let`s begin. Firstly we need to configure our environment so we must have a Visual Studio with MVC 3  Razor isntalled on it. Razor can be obtained from here . After installation process completed , the second step is to set up a new WebStie project (Picture 1.) Picture 1. After you confirm Your project type choise, next window starts. On it You should select the second web project type (with Forms autentication method)  and than choose RAZOR form dropdown (Picture 2.). Picture 2. Now You new web solution contains several folders and files by default. Their description is not a point of this article so allow myself to continue. Next step is to create a simple model for our PartialView. As an example I  created a simple _UserModel.cs in Models folder. The source code for this model is:  public class _UserModel     {