Check Type of Object at Runtime in C#

If You want to check the TYPE of an object at runtime in C#
then you have to use IS Keyword

example :

using System;

class CApp
{
public static void Main()
{
string s = "Shubhank";
long i = 900;

Console.WriteLine( "{0} is {1}an integer", s, (IsIntegerType(s) ? "" : "not ") );
Console.WriteLine( "{0} is {1}an integer", i, (IsIntegerType(i) ? "" : "not ") );
}

static bool IsIntegerType( object obj )
{
if( obj is int || obj is long )
return true;
else
return false;
}
}




Output will be

Shubhank is not an integer
900 is an integer

Comments

Post a Comment

Popular posts from this blog

How to Use Not IN operator

Hello Friends Here i am explaining an example of NOT IN operator. Suppose you have two tables one is employee and Bademployee employee and Bademployee has relationship. Bademployee contains records who are bad Now you want to show the Good employee so following is the example Step : 1 create Table emp Run this Query in your Query Analyzer for table emp 1) CREATE TABLE [dbo].[emp]( [empId] [int] NOT NULL, [empName] [nvarchar](max) NULL, CONSTRAINT [PK_emp] PRIMARY KEY CLUSTERED ( [empId] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] Now Run this Query in your Query Analyzer for table bademp CREATE TABLE [dbo].[bademp]( [empid] [int] NOT NULL, [bademp] [nvarchar](50) NOT NULL, CONSTRAINT [PK_bademp] PRIMARY KEY CLUSTERED ( [empid] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY...
Read more

SQL Interview Questions

Image
SQL Interview Questions Q. Display names of all salesperson whose customers are john? Q. Display names of all salesperson whose customers are not john? Q. Insert   those records into a table highvale(name,age) from saleperson whose salary is 2000 or greater than ? Q.   Display name of customer who have 2 or more order ? Q. Display name of saleperson who have maximum amt in orders ? Q. Display name of saleperson,total of amt   who have maximum amt in orders ? Q.   Display 3 rd highest salary of salesperson (Assume there are 1000 records in salesperson table). Q. Difference between Delete and Truncate ? Q.   Select substr(‘shubh’,2) from dual ? Is this Query will run ? yes /No .If not then what will be correct Query ? Q.   Select Round(2.75,2) from dual, Select   trunc(2.75,2) from dual ? what will be output ? Q. Difference between CAST and Convert ? (note : both function may be or may...
Read more

String Function in SQL-Substring,Reverse,CharIndex

Suppose You have String "~/ABC/PQR.xxx" in your tables Now u Want to string PQR.xxx fromm above string So For That Follow the Steps 1) Open NewQuery Window 2) Paste following Code declare @str as varchar(200),@str1 as varchar(200),@rev as varchar(200) set @str ='~/ABC/PQR.xxx' select @rev = reverse(@str) SELECT @str1 = CHARINDEX('/', reverse(@str)) select @str1,@rev'@rev',reverse(substring(@rev,0,convert(int,@str1))) 3) Execute the Code 4) You will get the Output Like that PQR.xxx
Read more