SqlCommand CommandTimeout Property

C# > Data > SqlCommand > CommandTimeout

The time in seconds to wait (timeout) for the command to execute. The default is 30 seconds.

A value of 0 indicates no limit and will wait indefinitely until command is executed.

Example:

SqlConnection con = new SqlConnection("connString");
SqlCommand com = new SqlCommand("exec your_stored_procedure", con);
com.CommandTimeout = 60;

Convert number to datetime SQL Server

SQL Server > Built-in Functions > CAST > Numbers to Date

Sometimes we need to convert numbers (year, month, day) to date like DateSerial.

In order to be independent of the language and locale settings, you should use the ISO 8601 YYYYMMDD format - this will work on any SQL Server system with any language and regional setting in effect.

Example:

declare @year int

declare @month int
declare @day int

set @year = 2012

set @month = 9
set @day = 30

SELECT

CAST(
CAST(@year AS VARCHAR(4)) +
RIGHT('0' + CAST(@month AS VARCHAR(2)), 2) +
RIGHT('0' + CAST(@day AS VARCHAR(2)), 2)
AS DATETIME)

Result:

2012-09-30 00:00:00.000

DBCC SHRINKDATABASE (Transact-SQL)

Shrinks the size of the data and log files in the specified database.


DBCC SHRINKDATABASE
( database_name | database_id | 0
[ , target_percent ]
[ , { NOTRUNCATE | TRUNCATEONLY } ]
)
[ WITH NO_INFOMSGS ]




Arguments

database_name | database_id | 0

Is the name or ID of the database to be shrunk. If 0 is specified, the current database is used.

target_percent

Is the percentage of free space that you want left in the database file after the database has been shrunk.

NOTRUNCATE

Compacts the data in data files by moving allocated pages from the end of a file to unallocated pages in the front of the file. target_percent is optional.

The free space at the end of the file is not returned to the operating system, and the physical size of the file does not change. Therefore, when NOTRUNCATE is specified, the database appears not to shrink.

NOTRUNCATE is applicable only to data files. The log files are not affected.

TRUNCATEONLY

Releases all free space at the end of the file to the operating system but does not perform any page movement inside the file. The data file is shrunk only to the last allocated extent. target_percent is ignored if specified with TRUNCATEONLY.

TRUNCATEONLY is applicable only to data files. The log files are not affected.

WITH NO_INFOMSGS
Suppresses all informational messages that have severity levels from 0 through 10.

IIS Error: This configuration section cannot be used at this path.

IIS Error: This configuration section cannot be used at this path.
This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault=”Deny”), or set explicitly by a location tag with overrideMode=”Deny” or the legacy allowOverride=”false”.
Note: When you meet this error you must consider where IIS locates your error. For example, in the image above the error relates to handlers tag. I have this error twice when publish WCF Services, one with handlers and one with modules.

Solution:
- Navigate to C:\Windows\System32\inetsrv\config
- Right click on file applicationHost.config and open it with Notepad
- Search and find the tag which IIS has error with it and edit overrideModeDefault = “Allow”. Remember to save file before close it

Mouse Cursor C#

C# > Cursors

Cursors provides a collection of Cursor objects for use by a Windows Forms application.
 
Example: 1. Wait cursor

public Form1()

{
    InitializeComponent();             
    this.Cursor = Cursors.WaitCursor; // Wait cursor, an hourglass shape.
     // do something
    this.Cursor = Cursors.Default; //default cursor, usually an arrow cursor.
}
 

While (c#)

C# > Statements > while

While statement executes a statement or a block of statements until a specified expression evaluates to false.
A while loop can be terminated with

• break
• goto
• return
• throw

Pass control to the next iteration with the continue statement.
   
Example:

int i = 0;

while (i < 10)
{
     if (i == 1)
   {
         i = 2;
     continue; // goto to next loop
   }
   if (i == 2)
     return; // exit while
   if (i==5)
     break; // exit while
  
   i= i + 1;
}

 

MS Excel: Concatenate strings

Excel > Operators> Concatenate

To concatenate multiple strings into a single string in Excel, you can use the "&" operator to separate the string values.

string_1 & string_2 & string_n