Path Details in Asp.net - Absolute Path and Relative Path in asp.net

Path Details in Asp.net - Absolute Path and Relative Path in asp.net

        string applicationPath = string.Empty;
        string executionFilePath=string.Empty;
        string filePath = string.Empty;
        string path = string.Empty;

        string physicalApplicationPath = string.Empty;
        string physicalPath = string.Empty;
        string rawUrl = string.Empty;

        String rootPath = string.Empty;
        string mapPath = string.Empty;


        //Relative path
        //Only a Portion of full path

        //Absolute path
        //Contains Root directory and all Sub directory


       // Gets the ASP.NET application's virtual application root path on the server.

         applicationPath = Request.ApplicationPath + "/images/Nature.gif";

        //Output : /ApplicationPathInWeb/images/Nature.gif

        //Gets the virtual path of the current request.

         executionFilePath = Request.CurrentExecutionFilePath;

        //Output : /ApplicationPathInWeb/Default.aspx

         //Gets the virtual path of the current request.for the URL http://www.contoso.com/virdir/page.html/tail,      //the FilePath value is /virdir/page.html.

         filePath = Request.FilePath;

        //Output : /ApplicationPathInWeb/Default.aspx

         //Gets the virtual path of the current request.

         path = Request.Path;

        //Output : /ApplicationPathInWeb/Default.aspx

         physicalApplicationPath = Request.PhysicalApplicationPath;
        //Output:D:\Arun\SupportTools\ApplicationPathInWeb\

         physicalPath = Request.PhysicalPath;
        //Output:D:\Arun\SupportTools\ApplicationPathInWeb\Default.aspx

         rawUrl = Request.RawUrl;
        //Output:/ApplicationPathInWeb/Default.aspx

         rootPath = Server.MapPath("~");
        //Output:D:\Arun\SupportTools\ApplicationPathInWeb

         mapPath = Request.MapPath("~\\nature.jpg");
        //Output:D:\Arun\SupportTools\ApplicationPathInWeb\nature.jpg

Select statement and Case Statement in Sql Server

Select statement and Case Statement in Sql Server



SELECT   ProductNumber, Name, "Price Range" =
      CASE
         WHEN ListPrice =  0 THEN 'Mfg item - not for resale'
         WHEN ListPrice < 50 THEN 'Under $50'
         WHEN ListPrice >= 50 and ListPrice < 250 THEN 'Under $250'
         WHEN ListPrice >= 250 and ListPrice < 1000 THEN 'Under $1000'
         ELSE 'Over $1000'
      END
FROM Production.Product
ORDER BY ProductNumber ;

Use Application Wrapper Class To Access Web.Config Values

Use Application Wrapper Class To Access Web.Config Values

Make sure you have a Reference to the System.Configuration.DLL

using System;using System.Collections.Generic;using System.Configuration;using System.Web;

public static class ApplicationWrapper{    #region public members
    public static string DBConnection
    {
        get { return ConfigurationManager.ConnectionStrings["DBConnection"].ConnectionString; }
    }
    public static int MaxLoginAttempts
    {
        get { return int.Parse(ConfigurationManager.AppSettings["MaxLoginAttempts"]); }
    }
    public static string Company
    {
        get { return ConfigurationManager.AppSettings["Company"]; }
    }    #endregion}

SQL Server Where 1=0

SQL Server Where 1=0

Used in both static and dynamic query.

WHERE 1 = 0 (or any always false condition) 

It is used to create a table of identical structure, sans data: In the below query empty table is created in the same structure.

SELECT * INTO dbo.NewTable FROM dbo.SomeTable WHERE 0 = 1;

SQL Server Where 1=1

SQL Server Where 1=1


where 1=1 condition are most probably used in dynamic query in Sql Server.

where 1=1 equal to no where condition [i.e] always return the true value.

While building dynamic query some times there is no need of where condition, To handle this kind of situation this condition SQL Server Where 1=1 is used.

SET @SelectStatement = 'SELECT SomeData FROM dbo.SomeTable WHERE 1  = 1';
IF @Column1 IS NOT NULL SET @SelectStatement = @SelectStatement + ' AND Column1 = @Column1';
IF @Column2 IS NOT NULL SET @SelectStatement = @SelectStatement + ' AND Column2 = @Column2';

WHILE in Sqlserver

WHILE in Sqlserver


Sets a condition for the repeated execution of an SQL statement or statement block. The statements are executed repeatedly as long as the specified condition is true. The execution of statements in the WHILE loop can be controlled from inside the loop with the BREAK and CONTINUE keywords.

Example:

WHILE (SELECT AVG(ListPrice) FROM Production.Product) < $300
BEGIN
   UPDATE Production.Product
      SET ListPrice = ListPrice * 2
   SELECT MAX(ListPrice) FROM Production.Product
   IF (SELECT MAX(ListPrice) FROM Production.Product) > $500
      BREAK
   ELSE
      CONTINUE
END

PIVOT and UNPIVOT Query in Sql Server

PIVOT and UNPIVOT Query in Sql Server

PIVOT rotates a table-valued expression by turning the unique values from one column in the expression into multiple columns in the output, and performs aggregations where they are required on any remaining column values that are wanted in the final output.


UNPIVOT performs the opposite operation to PIVOT by rotating columns of a table-valued expression into column values.

Basic PIVOT Example

The following code example produces a two-column table that has four rows.

USE AdventureWorks2008R2 ;
GO
SELECT DaysToManufacture, AVG(StandardCost) AS AverageCost 
FROM Production.Product
GROUP BY DaysToManufacture;

Here is the result set.



DaysToManufacture          AverageCost

0                          5.0885

1                          223.88

2                          359.10

The following code displays the same result, pivoted so that the DaysToManufacture values become the column headings. A column is provided for three [3] days, even though the results are NULL.










-- Pivot table with one row and five columns
SELECT 'AverageCost' AS Cost_Sorted_By_Production_Days, 
[0], [1], [2], [3], [4]
FROM
(SELECT DaysToManufacture, StandardCost 
    FROM Production.Product) AS SourceTable
PIVOT
(
AVG(StandardCost)
FOR DaysToManufacture IN ([0], [1], [2], [3], [4])
) AS PivotTable;







Here is the result set.

Cost_Sorted_By_Production_Days    0         1         2           3       4       

AverageCost                       5.0885    223.88    359.1082    NULL    949.4105

http://msdn.microsoft.com/en-us/library/ms177410(v=sql.105).aspx