Code Master - A reference guide for programmer's

Tuesday, October 28, 2014

JavaScript to change the opacity for an element

 <html>  
 <body>  
 <p id="p1">Select a value from the list below, to change this element's opacity!</p>  
 <select onchange="myFunction(this);" size="5">  
  <option>0  
  <option>0.2  
  <option>0.5  
  <option>0.8  
  <option selected="selected">1  
 </select>  
 <script>  
 function myFunction(x) {  
 // Return the text of the selected option  
   var opacity = x.options[x.selectedIndex].text;  
   var el = document.getElementById("p1");  
   if (el.style.opacity !== undefined) {  
     el.style.opacity = opacity;  
   } else {  
     alert("Your browser doesn't support this example!");  
   }  
 }  
 </script>  
 </body>  
 </html>

OutPut
Output Image

Calculate difference between two dates (number of days)?

Assuming StartDate and EndDate are of type DateTime:

(EndDate - StartDate).TotalDays

Easiest way to subtract time - C#

 DateTime original = new DateTime(year, month, day, 8, 0, 0);  
 DateTime updated = original.Add(new TimeSpan(5,0,0));  
 DateTime original = new DateTime(year, month, day, 17, 0, 0);  
 DateTime updated = original.Add(new TimeSpan(-2,0,0));  
 DateTime original = new DateTime(year, month, day, 17, 30, 0);  
 DateTime updated = original.Add(new TimeSpan(0,45,0));

Sunday, October 26, 2014

Query to list number of records in each table in a database

 SELECT   
   t.NAME AS TableName,  
   i.name as indexName,  
   p.[Rows],  
   sum(a.total_pages) as TotalPages,   
   sum(a.used_pages) as UsedPages,   
   sum(a.data_pages) as DataPages,  
   (sum(a.total_pages) * 8) / 1024 as TotalSpaceMB,   
   (sum(a.used_pages) * 8) / 1024 as UsedSpaceMB,   
   (sum(a.data_pages) * 8) / 1024 as DataSpaceMB  
 FROM   
   sys.tables t  
 INNER JOIN     
   sys.indexes i ON t.OBJECT_ID = i.object_id  
 INNER JOIN   
   sys.partitions p ON i.object_id = p.OBJECT_ID AND i.index_id = p.index_id  
 INNER JOIN   
   sys.allocation_units a ON p.partition_id = a.container_id  
 WHERE   
   t.NAME NOT LIKE 'dt%' AND  
   i.OBJECT_ID > 255 AND    
   i.index_id <= 1  
 GROUP BY   
   t.NAME, i.object_id, i.index_id, i.name, p.[Rows]  
 ORDER BY   
   --object_name(i.object_id)   
   rows desc

 SELECT sc.name +'.'+ ta.name TableName  
 ,SUM(pa.rows) RowCnt  
 FROM sys.tables ta  
 INNER JOIN sys.partitions pa  
 ON pa.OBJECT_ID = ta.OBJECT_ID  
 INNER JOIN sys.schemas sc  
 ON ta.schema_id = sc.schema_id  
 WHERE ta.is_ms_shipped = 0 AND pa.index_id IN (1,0)  
 GROUP BY sc.name,ta.name  
 ORDER BY SUM(pa.rows) DESC