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C# How to check prammatically if null value exists in database table (using stored procedure)?

Posted By:      Posted Date: October 10, 2010    Points: 0   Category :Windows Application
 
Folks!

How to programattically check if null value exists in database table (using stored procedure)?

I know it's possble in the Query Analyzer (see last SQL query batch statements)?

But how can I pass null value as parameter to the database stored procedure programattically using C#?

Although I can check for empty column (the following code passes string.Empty as parameter but how to pass null value?), I cannot check for null value in the following code snippet:

SQL Queries:

USE [master]
GO

IF EXISTS (SELECT name FROM sys.databases WHERE name = 'ExampleDatabase')
DROP DATABASE [ExampleDatabase];
GO

CREATE DATABASE [ExampleDatabase];
GO

USE [ExampleDatabase];
GO

IF EXISTS (SELECT NAME FROM SYS.TABLES WHERE NAME = 'ExampleTable')
DROP TABLE dbo.ExampleTable;
GO

CREATE TABLE
dbo.ExampleTable
(
ID INT IDENTITY(1,1) NOT NULL,
UserID INT NULL,
Name NVARCHAR(50) NULL,
DateOfBirth DATETIME,
IsActive BIT,
Phone NVARCHAR(50) NULL,
Fax NVARCHAR(50) NULL,
CONSTRAINT PK_ID PRIMARY KEY(ID),
CONSTRAINT UNIQUE_Phone UNIQUE(Phone),
CONSTRAINT FK_UserID FOREIGN KEY(UserID) REFERENCES ExampleTable(ID),
CONSTRAINT FK_Fax FOREIGN KEY(Fax) REFERENCES ExampleTable(Phone)
);
GO

INSERT INT


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