How to read excel file data into datatable in c# to store in db

 protected void Page_Load(object sender, EventArgs e)
    {
       DataTable dt=  ReadExcelToTable("E:\\31october\\Excel\\Files\\empdata.xlsx");
    }

private DataTable ReadExcelToTable(string path)    
 {

     //Connection String

     string connstring = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties='Excel 8.0;HDR=NO;IMEX=1';";  
     //the same name 
     //string connstring = Provider=Microsoft.JET.OLEDB.4.0;Data Source=" + path + //";Extended Properties='Excel 8.0;HDR=NO;IMEX=1';"; 

     using(OleDbConnection conn = new OleDbConnection(connstring))
     {
        conn.Open();
        //Get All Sheets Name
        DataTable sheetsName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables,new object[]{null,null,null,"Table"});  

        //Get the First Sheet Name
        string firstSheetName = sheetsName.Rows[0][2].ToString(); 

        //Query String 
        string sql = string.Format("SELECT * FROM [{0}]",firstSheetName); 
        OleDbDataAdapter ada =new OleDbDataAdapter(sql,connstring);
        DataSet set = new DataSet();
        ada.Fill(set);
        return set.Tables[0];   
   }
 }

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JS FIDDLE LINK 

SQL SERVER PIVOT TABLE

create table DailyIncome
(
VendorId nvarchar(10),
IncomeDay nvarchar(10),
IncomeAmount int
 )

insert into DailyIncome values ('SPIKE', 'FRI', 100)
insert into DailyIncome values ('SPIKE', 'MON', 300)
insert into DailyIncome values ('FREDS', 'SUN', 400)
insert into DailyIncome values ('SPIKE', 'WED', 500)
insert into DailyIncome values ('SPIKE', 'TUE', 200)
insert into DailyIncome values ('JOHNS', 'WED', 900)
insert into DailyIncome values ('SPIKE', 'FRI', 100)
insert into DailyIncome values ('JOHNS', 'MON', 300)
insert into DailyIncome values ('SPIKE', 'SUN', 400)
insert into DailyIncome values ('JOHNS', 'FRI', 300)
insert into DailyIncome values ('FREDS', 'TUE', 500)
insert into DailyIncome values ('FREDS', 'TUE', 200)
insert into DailyIncome values ('SPIKE', 'MON', 900)
insert into DailyIncome values ('FREDS', 'FRI', 900)
insert into DailyIncome values ('FREDS', 'MON', 500)
insert into DailyIncome values ('JOHNS', 'SUN', 600)
insert into DailyIncome values ('SPIKE', 'FRI', 300)
insert into DailyIncome values ('SPIKE', 'WED', 500)
insert into DailyIncome values ('SPIKE', 'FRI', 300)
insert into DailyIncome values ('JOHNS', 'THU', 800)
insert into DailyIncome values ('JOHNS', 'SAT', 800)
insert into DailyIncome values ('SPIKE', 'TUE', 100)
insert into DailyIncome values ('SPIKE', 'THU', 300)
insert into DailyIncome values ('FREDS', 'WED', 500)
insert into DailyIncome values ('SPIKE', 'SAT', 100)
insert into DailyIncome values ('FREDS', 'SAT', 500)
insert into DailyIncome values ('FREDS', 'THU', 800)
insert into DailyIncome values ('JOHNS', 'TUE', 600)
SELECT * FROM DailyIncome
select * from DailyIncome
pivot (avg (IncomeAmount) for IncomeDay in ([MON],[TUE],[WED],[THU],[FRI],[SAT],[SUN])) as AvgIncomePerDay
select * from DailyIncome
pivot (max (IncomeAmount) for IncomeDay in ([MON],[TUE],[WED],[THU],[FRI],[SAT],[SUN])) as MaxIncomePerDay

select * from DailyIncome
pivot (min (IncomeAmount) for IncomeDay in ([MON],[TUE],[WED],[THU],[FRI],[SAT],[SUN])) as MaxIncomePerDay
select * from DailyIncome
pivot (sum (IncomeAmount) for IncomeDay in ([MON],[TUE],[WED],[THU],[FRI],[SAT],[SUN])) as MaxIncomePerDay

drop table DailyIncome

 

WEB API

http://www.asp.net/web-api/overview/creating-web-apis/using-web-api-with-entity-framework/using-web-api-with-entity-framework,-part-1

insert multiple rows sql server 2008

For inserting multiple rows using one insert statement you can do as following example :

declare @dept table
 (
   DeptId int identity(1,1) not null,
   DeptName nvarchar(500)
 )

 insert into @dept values ('sales'),('marketting'),('hr'),('IT')

 select * from @dept 

SQL fiddle can be check here  

Get random rows from a table in mysql

if you want to get random rows from your table  so you can use rand() function of my sql in order by clause. 

so for using this you have to use this in order by clause. 

SELECT id,title,publishDate FROM mytable ORDER BY RAND()  LIMIT 5

but how its works ? how rand() function generates rows randomly . 

actually rand() function generates  a random floating-point value v in the range 0 <= v < 1.0. If a constant integer argument N is specified, it is used as the seed value, which produces a repeatable sequence of column values

SHOW SERIAL NUMBER IN RDLC REPORT

may be you need to show serial number in your rdlc report then you can use following syntax for showing 1,2,3... continuous on in table field

=RowNumber(Nothing)

and if you want to re-generate serial number for each  group in rdlc then you can use following syntax

   =RowNumber("table1_Group1")

where table1_Group1 is group name . 

Thanks